Merge branch 'master' into feature/allow_connection_timeout_to_be_set

.travis.yml

@@ -55,6 +55,7 @@ script:
     if [[ "$TRAVIS_RUST_VERSION" == "stable" ]]; then
       cd examples/basics && cargo check && cd ../..
       cd examples/hello-world && cargo check && cd ../..
+      cd examples/http-proxy && cargo check && cd ../..
       cd examples/multipart && cargo check && cd ../..
       cd examples/json && cargo check && cd ../..
       cd examples/juniper && cargo check && cd ../..
@@ -65,6 +66,7 @@ script:
       cd examples/tls && cargo check && cd ../..
       cd examples/websocket-chat && cargo check && cd ../..
       cd examples/websocket && cargo check && cd ../..
+      cd examples/unix-socket && cargo check && cd ../..
     fi
   - |
     if [[ "$TRAVIS_RUST_VERSION" == "nightly" && $CLIPPY ]]; then

CHANGES.md

@@ -1,6 +1,15 @@
 # Changes
 
-## 0.4.5 
+## 0.4.5 (2018-03-xx)
+
+* Fix compression #103 and #104
+
+* Enable compression support for `NamedFile`
+
+* Better support for `NamedFile` type
+
+* Add `ResponseError` impl for `SendRequestError`.
+  This improves ergonomics of http client.
   
 * Allow connection timeout to be set
 

Cargo.toml

@@ -48,7 +48,7 @@ http-range = "0.1"
 libc = "0.2"
 log = "0.4"
 mime = "0.3"
-mime_guess = "1.8"
+mime_guess = "2.0.0-alpha"
 num_cpus = "1.0"
 percent-encoding = "1.0"
 rand = "0.4"
@@ -59,6 +59,7 @@ sha1 = "0.6"
 smallvec = "0.6"
 time = "0.1"
 encoding = "0.2"
+language-tags = "0.2"
 url = { version="1.7", features=["query_encoding"] }
 cookie = { version="0.10", features=["percent-encode", "secure"] }
 
@@ -106,6 +107,7 @@ members = [
   "examples/r2d2",
   "examples/json",
   "examples/hello-world",
+  "examples/http-proxy",
   "examples/multipart",
   "examples/state",
   "examples/redis-session",
@@ -114,5 +116,6 @@ members = [
   "examples/websocket",
   "examples/websocket-chat",
   "examples/web-cors/backend",
+  "examples/unix-socket",
   "tools/wsload/",
 ]

examples/http-proxy/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "http-proxy"
+version = "0.1.0"
+authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+workspace = "../.."
+
+[dependencies]
+env_logger = "0.5"
+futures = "0.1"
+actix = "0.5"
+actix-web = { path = "../../", features=["alpn"] }

examples/http-proxy/src/main.rs

@@ -0,0 +1,59 @@
+extern crate actix;
+extern crate actix_web;
+extern crate futures;
+extern crate env_logger;
+
+use actix_web::*;
+use futures::{Future, Stream};
+
+
+/// Stream client request response and then send body to a server response
+fn index(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
+    client::ClientRequest::get("https://www.rust-lang.org/en-US/")
+        .finish().unwrap()
+        .send()
+        .map_err(error::Error::from)   // <- convert SendRequestError to an Error
+        .and_then(
+            |resp| resp.body()         // <- this is MessageBody type, resolves to complete body
+                .from_err()            // <- convet PayloadError to a Error
+                .and_then(|body| {     // <- we got complete body, now send as server response
+                    httpcodes::HttpOk.build()
+                        .body(body)
+                        .map_err(error::Error::from)
+                }))
+        .responder()
+}
+
+/// streaming client request to a streaming server response
+fn streaming(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
+    // send client request
+    client::ClientRequest::get("https://www.rust-lang.org/en-US/")
+        .finish().unwrap()
+        .send()                         // <- connect to host and send request
+        .map_err(error::Error::from)    // <- convert SendRequestError to an Error
+        .and_then(|resp| {              // <- we received client response
+            httpcodes::HttpOk.build()
+                // read one chunk from client response and send this chunk to a server response
+                // .from_err() converts PayloadError to a Error
+                .body(Body::Streaming(Box::new(resp.from_err())))
+                .map_err(|e| e.into()) // HttpOk::build() mayb return HttpError, we need to convert it to a Error
+        })
+        .responder()
+}
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    env_logger::init();
+    let sys = actix::System::new("http-proxy");
+
+    let _addr = HttpServer::new(
+        || Application::new()
+            .middleware(middleware::Logger::default())
+            .resource("/streaming", |r| r.f(streaming))
+            .resource("/", |r| r.f(index)))
+        .bind("127.0.0.1:8080").unwrap()
+        .start();
+
+    println!("Started http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}

examples/unix-socket/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "unix-socket"
+version = "0.1.0"
+authors = ["Messense Lv <messense@icloud.com>"]
+
+[dependencies]
+env_logger = "0.5"
+actix = "0.5"
+actix-web = { path = "../../" }
+tokio-uds = "0.1"

examples/unix-socket/README.md

@@ -0,0 +1,14 @@
+## Unix domain socket example
+
+```bash
+$ curl --unix-socket /tmp/actix-uds.socket http://localhost/
+Hello world!
+```
+
+Although this will only one thread for handling incoming connections 
+according to the 
+[documentation](https://actix.github.io/actix-web/actix_web/struct.HttpServer.html#method.start_incoming).
+
+And it does not delete the socket file (`/tmp/actix-uds.socket`) when stopping
+the server so it will fail to start next time you run it unless you delete
+the socket file manually.

examples/unix-socket/src/main.rs

@@ -0,0 +1,31 @@
+extern crate actix;
+extern crate actix_web;
+extern crate env_logger;
+extern crate tokio_uds;
+
+use actix::*;
+use actix_web::*;
+use tokio_uds::UnixListener;
+
+
+fn index(_req: HttpRequest) -> &'static str {
+    "Hello world!"
+}
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    let _ = env_logger::init();
+    let sys = actix::System::new("unix-socket");
+
+    let listener = UnixListener::bind("/tmp/actix-uds.socket", Arbiter::handle()).expect("bind failed");
+    let _addr = HttpServer::new(
+        || Application::new()
+            // enable logger
+            .middleware(middleware::Logger::default())
+            .resource("/index.html", |r| r.f(|_| "Hello world!"))
+            .resource("/", |r| r.f(index)))
+        .start_incoming(listener.incoming(), false);
+
+    println!("Started http server: /tmp/actix-uds.socket");
+    let _ = sys.run();
+}

guide/src/qs_14.md

@@ -12,7 +12,7 @@ We have to define sync actor and connection that this actor will use. Same appro
 could be used for other databases.
 
 ```rust,ignore
-use actix::prelude::*;*
+use actix::prelude::*;
 
 struct DbExecutor(SqliteConnection);
 
@@ -24,11 +24,13 @@ impl Actor for DbExecutor {
 This is definition of our actor. Now we need to define *create user* message and response.
 
 ```rust,ignore
-#[derive(Message)]
-#[rtype(User, Error)]
 struct CreateUser {
     name: String,
 }
+
+impl Message for CreateUser {
+    type Result = Result<User, Error>;
+}
 ```
 
 We can send `CreateUser` message to `DbExecutor` actor, and as result we get
@@ -36,7 +38,7 @@ We can send `CreateUser` message to `DbExecutor` actor, and as result we get
 
 ```rust,ignore
 impl Handler<CreateUser> for DbExecutor {
-    type Result = Result<User, Error>
+    type Result = Result<User, Error>;
 
     fn handle(&mut self, msg: CreateUser, _: &mut Self::Context) -> Self::Result
     {

src/client/mod.rs

@@ -12,3 +12,20 @@ pub use self::response::ClientResponse;
 pub use self::connector::{Connect, Connection, ClientConnector, ClientConnectorError};
 pub(crate) use self::writer::HttpClientWriter;
 pub(crate) use self::parser::{HttpResponseParser, HttpResponseParserError};
+
+
+use httpcodes;
+use httpresponse::HttpResponse;
+use error::ResponseError;
+
+
+/// Convert `SendRequestError` to a `HttpResponse`
+impl ResponseError for SendRequestError {
+
+    fn error_response(&self) -> HttpResponse {
+        match *self {
+            SendRequestError::Connector(_) => httpcodes::HttpBadGateway.into(),
+            _ => httpcodes::HttpInternalServerError.into(),
+        }
+    }
+}

src/client/parser.rs

@@ -78,6 +78,7 @@ impl HttpResponseParser {
                             -> Poll<Option<Bytes>, PayloadError>
         where T: IoStream
     {
+        println!("PARSE payload, {:?}", self.decoder.is_some());
         if self.decoder.is_some() {
             loop {
                 // read payload

src/error.rs

@@ -129,8 +129,19 @@ impl ResponseError for io::Error {
     }
 }
 
-/// `InternalServerError` for `InvalidHeaderValue`
+/// `BadRequest` for `InvalidHeaderValue`
-impl ResponseError for header::InvalidHeaderValue {}
+impl ResponseError for header::InvalidHeaderValue {
+    fn error_response(&self) -> HttpResponse {
+        HttpResponse::new(StatusCode::BAD_REQUEST, Body::Empty)
+ }
+}
+
+/// `BadRequest` for `InvalidHeaderValue`
+impl ResponseError for header::InvalidHeaderValueBytes {
+    fn error_response(&self) -> HttpResponse {
+        HttpResponse::new(StatusCode::BAD_REQUEST, Body::Empty)
+    }
+}
 
 /// `InternalServerError` for `futures::Canceled`
 impl ResponseError for Canceled {}

src/fs.rs

@@ -4,23 +4,34 @@
 use std::io;
 use std::io::Read;
 use std::fmt::Write;
-use std::fs::{File, DirEntry};
+use std::fs::{File, DirEntry, Metadata};
 use std::path::{Path, PathBuf};
 use std::ops::{Deref, DerefMut};
+use std::time::{SystemTime, UNIX_EPOCH};
 
+#[cfg(unix)]
+use std::os::unix::fs::MetadataExt;
+
+use http::{Method, StatusCode};
 use mime_guess::get_mime_type;
 
+use header;
 use param::FromParam;
 use handler::{Handler, Responder};
-use headers::ContentEncoding;
+use httpmessage::HttpMessage;
 use httprequest::HttpRequest;
 use httpresponse::HttpResponse;
-use httpcodes::{HttpOk, HttpFound};
+use httpcodes::{HttpOk, HttpFound, HttpMethodNotAllowed};
 
 /// A file with an associated name; responds with the Content-Type based on the
 /// file extension.
 #[derive(Debug)]
-pub struct NamedFile(PathBuf, File);
+pub struct NamedFile {
+    path: PathBuf,
+    file: File,
+    md: Metadata,
+    modified: Option<SystemTime>,
+}
 
 impl NamedFile {
     /// Attempts to open a file in read-only mode.
@@ -30,18 +41,20 @@ impl NamedFile {
     /// ```rust
     /// use actix_web::fs::NamedFile;
     ///
-    /// # #[allow(unused_variables)]
     /// let file = NamedFile::open("foo.txt");
     /// ```
     pub fn open<P: AsRef<Path>>(path: P) -> io::Result<NamedFile> {
         let file = File::open(path.as_ref())?;
-        Ok(NamedFile(path.as_ref().to_path_buf(), file))
+        let md = file.metadata()?;
+        let path = path.as_ref().to_path_buf();
+        let modified = md.modified().ok();
+        Ok(NamedFile{path, file, md, modified})
     }
 
     /// Returns reference to the underlying `File` object.
     #[inline]
     pub fn file(&self) -> &File {
-        &self.1
+        &self.file
     }
 
     /// Retrieve the path of this file.
@@ -52,7 +65,6 @@ impl NamedFile {
     /// # use std::io;
     /// use actix_web::fs::NamedFile;
     ///
-    /// # #[allow(dead_code)]
     /// # fn path() -> io::Result<()> {
     /// let file = NamedFile::open("test.txt")?;
     /// assert_eq!(file.path().as_os_str(), "foo.txt");
@@ -61,7 +73,30 @@ impl NamedFile {
     /// ```
     #[inline]
     pub fn path(&self) -> &Path {
-        self.0.as_path()
+        self.path.as_path()
+    }
+
+    fn etag(&self) -> Option<header::EntityTag> {
+        // This etag format is similar to Apache's.
+        self.modified.as_ref().map(|mtime| {
+            let ino = {
+                #[cfg(unix)]
+                { self.md.ino() }
+                #[cfg(not(unix))]
+                { 0 }
+            };
+
+            let dur = mtime.duration_since(UNIX_EPOCH)
+                .expect("modification time must be after epoch");
+            header::EntityTag::strong(
+                format!("{:x}:{:x}:{:x}:{:x}",
+                        ino, self.md.len(), dur.as_secs(),
+                        dur.subsec_nanos()))
+        })
+    }
+
+    fn last_modified(&self) -> Option<header::HttpDate> {
+        self.modified.map(|mtime| mtime.into())
     }
 }
 
@@ -69,30 +104,113 @@ impl Deref for NamedFile {
     type Target = File;
 
     fn deref(&self) -> &File {
-        &self.1
+        &self.file
     }
 }
 
 impl DerefMut for NamedFile {
     fn deref_mut(&mut self) -> &mut File {
-        &mut self.1
+        &mut self.file
     }
 }
 
+/// Returns true if `req` has no `If-Match` header or one which matches `etag`.
+fn any_match(etag: Option<&header::EntityTag>, req: &HttpRequest) -> bool {
+    match req.get_header::<header::IfMatch>() {
+        Err(_) | Ok(header::IfMatch::Any) => true,
+        Ok(header::IfMatch::Items(ref items)) => {
+            if let Some(some_etag) = etag {
+                for item in items {
+                    if item.strong_eq(some_etag) {
+                        return true;
+                    }
+                }
+            }
+            false
+        }
+    }
+}
+
+/// Returns true if `req` doesn't have an `If-None-Match` header matching `req`.
+fn none_match(etag: Option<&header::EntityTag>, req: &HttpRequest) -> bool {
+    match req.get_header::<header::IfNoneMatch>() {
+        Ok(header::IfNoneMatch::Any) => false,
+        Ok(header::IfNoneMatch::Items(ref items)) => {
+            if let Some(some_etag) = etag {
+                for item in items {
+                    if item.weak_eq(some_etag) {
+                        return false;
+                    }
+                }
+            }
+            true
+        }
+        Err(_) => true,
+    }
+}
+
+
 impl Responder for NamedFile {
     type Item = HttpResponse;
     type Error = io::Error;
 
-    fn respond_to(mut self, _: HttpRequest) -> Result<HttpResponse, io::Error> {
+    fn respond_to(mut self, req: HttpRequest) -> Result<HttpResponse, io::Error> {
-        let mut resp = HttpOk.build();
+        if *req.method() != Method::GET && *req.method() != Method::HEAD {
-        resp.content_encoding(ContentEncoding::Identity);
+            return Ok(HttpMethodNotAllowed.build()
-        if let Some(ext) = self.path().extension() {
+                      .header(header::http::CONTENT_TYPE, "text/plain")
-            let mime = get_mime_type(&ext.to_string_lossy());
+                      .header(header::http::ALLOW, "GET, HEAD")
-            resp.content_type(format!("{}", mime).as_str());
+                      .body("This resource only supports GET and HEAD.").unwrap())
         }
+
+        let etag = self.etag();
+        let last_modified = self.last_modified();
+
+        // check preconditions
+        let precondition_failed = if !any_match(etag.as_ref(), &req) {
+            true
+        } else if let (Some(ref m), Ok(header::IfUnmodifiedSince(ref since))) =
+            (last_modified, req.get_header())
+        {
+            m > since
+        } else {
+            false
+        };
+
+        // check last modified
+        let not_modified = if !none_match(etag.as_ref(), &req) {
+            true
+        } else if let (Some(ref m), Ok(header::IfModifiedSince(ref since))) =
+            (last_modified, req.get_header())
+        {
+            m <= since
+        } else {
+            false
+        };
+
+        let mut resp = HttpOk.build();
+
+        resp
+            .if_some(self.path().extension(), |ext, resp| {
+                resp.set(header::ContentType(get_mime_type(&ext.to_string_lossy())));
+            })
+            .if_some(last_modified, |lm, resp| {resp.set(header::LastModified(lm));})
+            .if_some(etag, |etag, resp| {resp.set(header::ETag(etag));});
+
+        if precondition_failed {
+            return Ok(resp.status(StatusCode::PRECONDITION_FAILED).finish().unwrap())
+        } else if not_modified {
+            return Ok(resp.status(StatusCode::NOT_MODIFIED).finish().unwrap())
+        }
+
+        resp.content_length(self.md.len());
+
+        if *req.method() == Method::GET {
             let mut data = Vec::new();
-        let _ = self.1.read_to_end(&mut data);
+            let _ = self.file.read_to_end(&mut data);
             Ok(resp.body(data).unwrap())
+        } else {
+            Ok(resp.finish().unwrap())
+        }
     }
 }
 
@@ -308,7 +426,8 @@ impl<S> Handler<S> for StaticFiles {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use http::{header, StatusCode};
+    use test::TestRequest;
+    use http::{header, Method, StatusCode};
 
     #[test]
     fn test_named_file() {
@@ -322,6 +441,15 @@ mod tests {
         assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(), "text/x-toml")
     }
 
+    #[test]
+    fn test_named_file_not_allowed() {
+        let req = TestRequest::default().method(Method::POST).finish();
+        let file = NamedFile::open("Cargo.toml").unwrap();
+
+        let resp = file.respond_to(req).unwrap();
+        assert_eq!(resp.status(), StatusCode::METHOD_NOT_ALLOWED);
+    }
+
     #[test]
     fn test_static_files() {
         let mut st = StaticFiles::new(".", true);

src/header/common/accept.rs

@@ -0,0 +1,158 @@
+use mime::{self, Mime};
+use header::{QualityItem, qitem, http};
+
+header! {
+    /// `Accept` header, defined in [RFC7231](http://tools.ietf.org/html/rfc7231#section-5.3.2)
+    ///
+    /// The `Accept` header field can be used by user agents to specify
+    /// response media types that are acceptable.  Accept header fields can
+    /// be used to indicate that the request is specifically limited to a
+    /// small set of desired types, as in the case of a request for an
+    /// in-line image
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Accept = #( media-range [ accept-params ] )
+    ///
+    /// media-range    = ( "*/*"
+    ///                  / ( type "/" "*" )
+    ///                  / ( type "/" subtype )
+    ///                  ) *( OWS ";" OWS parameter )
+    /// accept-params  = weight *( accept-ext )
+    /// accept-ext = OWS ";" OWS token [ "=" ( token / quoted-string ) ]
+    /// ```
+    ///
+    /// # Example values
+    /// * `audio/*; q=0.2, audio/basic`
+    /// * `text/plain; q=0.5, text/html, text/x-dvi; q=0.8, text/x-c`
+    ///
+    /// # Examples
+    /// ```rust
+    /// # extern crate actix_web;
+    /// extern crate mime;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{Accept, qitem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    ///
+    /// builder.set(
+    ///     Accept(vec![
+    ///         qitem(mime::TEXT_HTML),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// extern crate mime;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{Accept, qitem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    ///
+    /// builder.set(
+    ///     Accept(vec![
+    ///         qitem(mime::APPLICATION_JSON),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// extern crate mime;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{Accept, QualityItem, q, qitem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    ///
+    /// builder.set(
+    ///     Accept(vec![
+    ///         qitem(mime::TEXT_HTML),
+    ///         qitem("application/xhtml+xml".parse().unwrap()),
+    ///         QualityItem::new(
+    ///             mime::TEXT_XML,
+    ///             q(900)
+    ///         ),
+    ///         qitem("image/webp".parse().unwrap()),
+    ///         QualityItem::new(
+    ///             mime::STAR_STAR,
+    ///             q(800)
+    ///         ),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    (Accept, http::ACCEPT) => (QualityItem<Mime>)+
+
+    test_accept {
+        // Tests from the RFC
+         test_header!(
+            test1,
+            vec![b"audio/*; q=0.2, audio/basic"],
+            Some(HeaderField(vec![
+                QualityItem::new("audio/*".parse().unwrap(), q(200)),
+                qitem("audio/basic".parse().unwrap()),
+                ])));
+        test_header!(
+            test2,
+            vec![b"text/plain; q=0.5, text/html, text/x-dvi; q=0.8, text/x-c"],
+            Some(HeaderField(vec![
+                QualityItem::new(TEXT_PLAIN, q(500)),
+                qitem(TEXT_HTML),
+                QualityItem::new(
+                    "text/x-dvi".parse().unwrap(),
+                    q(800)),
+                qitem("text/x-c".parse().unwrap()),
+                ])));
+        // Custom tests
+        test_header!(
+            test3,
+            vec![b"text/plain; charset=utf-8"],
+            Some(Accept(vec![
+                qitem(TEXT_PLAIN_UTF_8),
+                ])));
+        test_header!(
+            test4,
+            vec![b"text/plain; charset=utf-8; q=0.5"],
+            Some(Accept(vec![
+                QualityItem::new(TEXT_PLAIN_UTF_8,
+                    q(500)),
+            ])));
+
+        #[test]
+        fn test_fuzzing1() {
+            use test::TestRequest;
+            let req = TestRequest::with_header(http::ACCEPT, "chunk#;e").finish();
+            let header = Accept::parse(&req);
+            assert!(header.is_ok());
+        }
+    }
+}
+
+impl Accept {
+    /// A constructor to easily create `Accept: */*`.
+    pub fn star() -> Accept {
+        Accept(vec![qitem(mime::STAR_STAR)])
+    }
+
+    /// A constructor to easily create `Accept: application/json`.
+    pub fn json() -> Accept {
+        Accept(vec![qitem(mime::APPLICATION_JSON)])
+    }
+
+    /// A constructor to easily create `Accept: text/*`.
+    pub fn text() -> Accept {
+        Accept(vec![qitem(mime::TEXT_STAR)])
+    }
+
+    /// A constructor to easily create `Accept: image/*`.
+    pub fn image() -> Accept {
+        Accept(vec![qitem(mime::IMAGE_STAR)])
+    }
+}

src/header/common/accept_charset.rs

@@ -0,0 +1,69 @@
+use header::{http, Charset, QualityItem};
+
+header! {
+    /// `Accept-Charset` header, defined in
+    /// [RFC7231](http://tools.ietf.org/html/rfc7231#section-5.3.3)
+    ///
+    /// The `Accept-Charset` header field can be sent by a user agent to
+    /// indicate what charsets are acceptable in textual response content.
+    /// This field allows user agents capable of understanding more
+    /// comprehensive or special-purpose charsets to signal that capability
+    /// to an origin server that is capable of representing information in
+    /// those charsets.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Accept-Charset = 1#( ( charset / "*" ) [ weight ] )
+    /// ```
+    ///
+    /// # Example values
+    /// * `iso-8859-5, unicode-1-1;q=0.8`
+    ///
+    /// # Examples
+    /// ```rust
+    /// # extern crate actix_web;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{AcceptCharset, Charset, qitem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     AcceptCharset(vec![qitem(Charset::Us_Ascii)])
+    /// );
+    /// # }
+    /// ```
+    /// ```rust
+    /// # extern crate actix_web;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{AcceptCharset, Charset, q, QualityItem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     AcceptCharset(vec![
+    ///         QualityItem::new(Charset::Us_Ascii, q(900)),
+    ///         QualityItem::new(Charset::Iso_8859_10, q(200)),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    /// ```rust
+    /// # extern crate actix_web;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{AcceptCharset, Charset, qitem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     AcceptCharset(vec![qitem(Charset::Ext("utf-8".to_owned()))])
+    /// );
+    /// # }
+    /// ```
+    (AcceptCharset, http::ACCEPT_CHARSET) => (QualityItem<Charset>)+
+
+    test_accept_charset {
+        /// Testcase from RFC
+        test_header!(test1, vec![b"iso-8859-5, unicode-1-1;q=0.8"]);
+    }
+}

src/header/common/accept_encoding.rs

@@ -0,0 +1,72 @@
+use header::{Encoding, QualityItem};
+
+header! {
+    /// `Accept-Encoding` header, defined in
+    /// [RFC7231](http://tools.ietf.org/html/rfc7231#section-5.3.4)
+    ///
+    /// The `Accept-Encoding` header field can be used by user agents to
+    /// indicate what response content-codings are
+    /// acceptable in the response.  An  `identity` token is used as a synonym
+    /// for "no encoding" in order to communicate when no encoding is
+    /// preferred.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Accept-Encoding  = #( codings [ weight ] )
+    /// codings          = content-coding / "identity" / "*"
+    /// ```
+    ///
+    /// # Example values
+    /// * `compress, gzip`
+    /// * ``
+    /// * `*`
+    /// * `compress;q=0.5, gzip;q=1`
+    /// * `gzip;q=1.0, identity; q=0.5, *;q=0`
+    ///
+    /// # Examples
+    /// ```
+    /// use hyper::header::{Headers, AcceptEncoding, Encoding, qitem};
+    ///
+    /// let mut headers = Headers::new();
+    /// headers.set(
+    ///     AcceptEncoding(vec![qitem(Encoding::Chunked)])
+    /// );
+    /// ```
+    /// ```
+    /// use hyper::header::{Headers, AcceptEncoding, Encoding, qitem};
+    ///
+    /// let mut headers = Headers::new();
+    /// headers.set(
+    ///     AcceptEncoding(vec![
+    ///         qitem(Encoding::Chunked),
+    ///         qitem(Encoding::Gzip),
+    ///         qitem(Encoding::Deflate),
+    ///     ])
+    /// );
+    /// ```
+    /// ```
+    /// use hyper::header::{Headers, AcceptEncoding, Encoding, QualityItem, q, qitem};
+    ///
+    /// let mut headers = Headers::new();
+    /// headers.set(
+    ///     AcceptEncoding(vec![
+    ///         qitem(Encoding::Chunked),
+    ///         QualityItem::new(Encoding::Gzip, q(600)),
+    ///         QualityItem::new(Encoding::EncodingExt("*".to_owned()), q(0)),
+    ///     ])
+    /// );
+    /// ```
+    (AcceptEncoding, "Accept-Encoding") => (QualityItem<Encoding>)*
+
+    test_accept_encoding {
+        // From the RFC
+        test_header!(test1, vec![b"compress, gzip"]);
+        test_header!(test2, vec![b""], Some(AcceptEncoding(vec![])));
+        test_header!(test3, vec![b"*"]);
+        // Note: Removed quality 1 from gzip
+        test_header!(test4, vec![b"compress;q=0.5, gzip"]);
+        // Note: Removed quality 1 from gzip
+        test_header!(test5, vec![b"gzip, identity; q=0.5, *;q=0"]);
+    }
+}

src/header/common/accept_language.rs

@@ -0,0 +1,76 @@
+use language_tags::LanguageTag;
+use header::{http, QualityItem};
+
+
+header! {
+    /// `Accept-Language` header, defined in
+    /// [RFC7231](http://tools.ietf.org/html/rfc7231#section-5.3.5)
+    ///
+    /// The `Accept-Language` header field can be used by user agents to
+    /// indicate the set of natural languages that are preferred in the
+    /// response.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Accept-Language = 1#( language-range [ weight ] )
+    /// language-range  = <language-range, see [RFC4647], Section 2.1>
+    /// ```
+    ///
+    /// # Example values
+    /// * `da, en-gb;q=0.8, en;q=0.7`
+    /// * `en-us;q=1.0, en;q=0.5, fr`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// # extern crate language_tags;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{AcceptLanguage, LanguageTag, qitem};
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// let mut langtag: LanguageTag = Default::default();
+    /// langtag.language = Some("en".to_owned());
+    /// langtag.region = Some("US".to_owned());
+    /// builder.set(
+    ///     AcceptLanguage(vec![
+    ///         qitem(langtag),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// # #[macro_use] extern crate language_tags;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::{AcceptLanguage, QualityItem, q, qitem};
+    /// #
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     AcceptLanguage(vec![
+    ///         qitem(langtag!(da)),
+    ///         QualityItem::new(langtag!(en;;;GB), q(800)),
+    ///         QualityItem::new(langtag!(en), q(700)),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    (AcceptLanguage, http::ACCEPT_LANGUAGE) => (QualityItem<LanguageTag>)+
+
+    test_accept_language {
+        // From the RFC
+        test_header!(test1, vec![b"da, en-gb;q=0.8, en;q=0.7"]);
+        // Own test
+        test_header!(
+            test2, vec![b"en-US, en; q=0.5, fr"],
+            Some(AcceptLanguage(vec![
+                qitem("en-US".parse().unwrap()),
+                QualityItem::new("en".parse().unwrap(), q(500)),
+                qitem("fr".parse().unwrap()),
+        ])));
+    }
+}

src/header/common/allow.rs

@@ -0,0 +1,85 @@
+use http::Method;
+use header::http;
+
+header! {
+    /// `Allow` header, defined in [RFC7231](http://tools.ietf.org/html/rfc7231#section-7.4.1)
+    ///
+    /// The `Allow` header field lists the set of methods advertised as
+    /// supported by the target resource.  The purpose of this field is
+    /// strictly to inform the recipient of valid request methods associated
+    /// with the resource.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Allow = #method
+    /// ```
+    ///
+    /// # Example values
+    /// * `GET, HEAD, PUT`
+    /// * `OPTIONS, GET, PUT, POST, DELETE, HEAD, TRACE, CONNECT, PATCH, fOObAr`
+    /// * ``
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # extern crate http;
+    /// # extern crate actix_web;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::Allow;
+    /// use http::Method;
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     Allow(vec![Method::GET])
+    /// );
+    /// # }
+    /// ```
+    ///
+    /// ```rust
+    /// # extern crate http;
+    /// # extern crate actix_web;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::Allow;
+    /// use http::Method;
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     Allow(vec![
+    ///         Method::GET,
+    ///         Method::POST,
+    ///         Method::PATCH,
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    (Allow, http::ALLOW) => (Method)*
+
+    test_allow {
+        // From the RFC
+        test_header!(
+            test1,
+            vec![b"GET, HEAD, PUT"],
+            Some(HeaderField(vec![Method::GET, Method::HEAD, Method::PUT])));
+        // Own tests
+        test_header!(
+            test2,
+            vec![b"OPTIONS, GET, PUT, POST, DELETE, HEAD, TRACE, CONNECT, PATCH"],
+            Some(HeaderField(vec![
+                Method::OPTIONS,
+                Method::GET,
+                Method::PUT,
+                Method::POST,
+                Method::DELETE,
+                Method::HEAD,
+                Method::TRACE,
+                Method::CONNECT,
+                Method::PATCH])));
+        test_header!(
+            test3,
+            vec![b""],
+            Some(HeaderField(Vec::<Method>::new())));
+    }
+}

src/header/common/cache_control.rs

@@ -0,0 +1,231 @@
+use std::fmt::{self, Write};
+use std::str::FromStr;
+use header::{Header, IntoHeaderValue, Writer};
+use header::{http, from_comma_delimited, fmt_comma_delimited};
+
+/// `Cache-Control` header, defined in [RFC7234](https://tools.ietf.org/html/rfc7234#section-5.2)
+///
+/// The `Cache-Control` header field is used to specify directives for
+/// caches along the request/response chain.  Such cache directives are
+/// unidirectional in that the presence of a directive in a request does
+/// not imply that the same directive is to be given in the response.
+///
+/// # ABNF
+///
+/// ```text
+/// Cache-Control   = 1#cache-directive
+/// cache-directive = token [ "=" ( token / quoted-string ) ]
+/// ```
+///
+/// # Example values
+///
+/// * `no-cache`
+/// * `private, community="UCI"`
+/// * `max-age=30`
+///
+/// # Examples
+/// ```rust
+/// use actix_web::httpcodes::HttpOk;
+/// use actix_web::header::{CacheControl, CacheDirective};
+///
+/// let mut builder = HttpOk.build();
+/// builder.set(
+///     CacheControl(vec![CacheDirective::MaxAge(86400u32)])
+/// );
+/// ```
+///
+/// ```rust
+/// use actix_web::httpcodes::HttpOk;
+/// use actix_web::header::{CacheControl, CacheDirective};
+///
+/// let mut builder = HttpOk.build();
+/// builder.set(
+///     CacheControl(vec![
+///         CacheDirective::NoCache,
+///         CacheDirective::Private,
+///         CacheDirective::MaxAge(360u32),
+///         CacheDirective::Extension("foo".to_owned(),
+///                                   Some("bar".to_owned())),
+///     ])
+/// );
+/// ```
+#[derive(PartialEq, Clone, Debug)]
+pub struct CacheControl(pub Vec<CacheDirective>);
+
+__hyper__deref!(CacheControl => Vec<CacheDirective>);
+
+//TODO: this could just be the header! macro
+impl Header for CacheControl {
+    fn name() -> http::HeaderName {
+        http::CACHE_CONTROL
+    }
+
+    #[inline]
+    fn parse<T>(msg: &T) -> Result<Self, ::error::ParseError>
+        where T: ::HttpMessage
+    {
+        let directives = from_comma_delimited(msg.headers().get_all(Self::name()))?;
+        if !directives.is_empty() {
+            Ok(CacheControl(directives))
+        } else {
+            Err(::error::ParseError::Header)
+        }
+    }
+}
+
+impl fmt::Display for CacheControl {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt_comma_delimited(f, &self[..])
+    }
+}
+
+impl IntoHeaderValue for CacheControl {
+    type Error = http::InvalidHeaderValueBytes;
+
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        let mut writer = Writer::new();
+        let _ = write!(&mut writer, "{}", self);
+        http::HeaderValue::from_shared(writer.take())
+    }
+}
+
+/// `CacheControl` contains a list of these directives.
+#[derive(PartialEq, Clone, Debug)]
+pub enum CacheDirective {
+    /// "no-cache"
+    NoCache,
+    /// "no-store"
+    NoStore,
+    /// "no-transform"
+    NoTransform,
+    /// "only-if-cached"
+    OnlyIfCached,
+
+    // request directives
+    /// "max-age=delta"
+    MaxAge(u32),
+    /// "max-stale=delta"
+    MaxStale(u32),
+    /// "min-fresh=delta"
+    MinFresh(u32),
+
+    // response directives
+    /// "must-revalidate"
+    MustRevalidate,
+    /// "public"
+    Public,
+    /// "private"
+    Private,
+    /// "proxy-revalidate"
+    ProxyRevalidate,
+    /// "s-maxage=delta"
+    SMaxAge(u32),
+
+    /// Extension directives. Optionally include an argument.
+    Extension(String, Option<String>)
+}
+
+impl fmt::Display for CacheDirective {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::CacheDirective::*;
+        fmt::Display::fmt(match *self {
+            NoCache => "no-cache",
+            NoStore => "no-store",
+            NoTransform => "no-transform",
+            OnlyIfCached => "only-if-cached",
+
+            MaxAge(secs) => return write!(f, "max-age={}", secs),
+            MaxStale(secs) => return write!(f, "max-stale={}", secs),
+            MinFresh(secs) => return write!(f, "min-fresh={}", secs),
+
+            MustRevalidate => "must-revalidate",
+            Public => "public",
+            Private => "private",
+            ProxyRevalidate => "proxy-revalidate",
+            SMaxAge(secs) => return write!(f, "s-maxage={}", secs),
+
+            Extension(ref name, None) => &name[..],
+            Extension(ref name, Some(ref arg)) => return write!(f, "{}={}", name, arg),
+
+        }, f)
+    }
+}
+
+impl FromStr for CacheDirective {
+    type Err = Option<<u32 as FromStr>::Err>;
+    fn from_str(s: &str) -> Result<CacheDirective, Option<<u32 as FromStr>::Err>> {
+        use self::CacheDirective::*;
+        match s {
+            "no-cache" => Ok(NoCache),
+            "no-store" => Ok(NoStore),
+            "no-transform" => Ok(NoTransform),
+            "only-if-cached" => Ok(OnlyIfCached),
+            "must-revalidate" => Ok(MustRevalidate),
+            "public" => Ok(Public),
+            "private" => Ok(Private),
+            "proxy-revalidate" => Ok(ProxyRevalidate),
+            "" => Err(None),
+            _ => match s.find('=') {
+                Some(idx) if idx+1 < s.len() => match (&s[..idx], (&s[idx+1..]).trim_matches('"')) {
+                    ("max-age" , secs) => secs.parse().map(MaxAge).map_err(Some),
+                    ("max-stale", secs) => secs.parse().map(MaxStale).map_err(Some),
+                    ("min-fresh", secs) => secs.parse().map(MinFresh).map_err(Some),
+                    ("s-maxage", secs) => secs.parse().map(SMaxAge).map_err(Some),
+                    (left, right) => Ok(Extension(left.to_owned(), Some(right.to_owned())))
+                },
+                Some(_) => Err(None),
+                None => Ok(Extension(s.to_owned(), None))
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use header::Header;
+    use test::TestRequest;
+
+    #[test]
+    fn test_parse_multiple_headers() {
+        let req = TestRequest::with_header(
+            http::CACHE_CONTROL, "no-cache, private").finish();
+        let cache = Header::parse(&req);
+        assert_eq!(cache.ok(), Some(CacheControl(vec![CacheDirective::NoCache,
+                                                      CacheDirective::Private])))
+    }
+
+    #[test]
+    fn test_parse_argument() {
+        let req = TestRequest::with_header(
+            http::CACHE_CONTROL, "max-age=100, private").finish();
+        let cache = Header::parse(&req);
+        assert_eq!(cache.ok(), Some(CacheControl(vec![CacheDirective::MaxAge(100),
+                                                      CacheDirective::Private])))
+    }
+
+    #[test]
+    fn test_parse_quote_form() {
+        let req = TestRequest::with_header(
+            http::CACHE_CONTROL, "max-age=\"200\"").finish();
+        let cache = Header::parse(&req);
+        assert_eq!(cache.ok(), Some(CacheControl(vec![CacheDirective::MaxAge(200)])))
+    }
+
+    #[test]
+    fn test_parse_extension() {
+        let req = TestRequest::with_header(
+            http::CACHE_CONTROL, "foo, bar=baz").finish();
+        let cache = Header::parse(&req);
+        assert_eq!(cache.ok(), Some(CacheControl(vec![
+            CacheDirective::Extension("foo".to_owned(), None),
+            CacheDirective::Extension("bar".to_owned(), Some("baz".to_owned()))])))
+    }
+
+    #[test]
+    fn test_parse_bad_syntax() {
+        let req = TestRequest::with_header(http::CACHE_CONTROL, "foo=").finish();
+        let cache: Result<CacheControl, _> = Header::parse(&req);
+        assert_eq!(cache.ok(), None)
+    }
+}

src/header/common/content_disposition.rs

@@ -0,0 +1,264 @@
+// # References
+//
+// "The Content-Disposition Header Field" https://www.ietf.org/rfc/rfc2183.txt
+// "The Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP)" https://www.ietf.org/rfc/rfc6266.txt
+// "Returning Values from Forms: multipart/form-data" https://www.ietf.org/rfc/rfc2388.txt
+// Browser conformance tests at: http://greenbytes.de/tech/tc2231/
+// IANA assignment: http://www.iana.org/assignments/cont-disp/cont-disp.xhtml
+
+use language_tags::LanguageTag;
+use std::fmt;
+use unicase;
+
+use header::{Header, Raw, parsing};
+use header::parsing::{parse_extended_value, http_percent_encode};
+use header::shared::Charset;
+
+/// The implied disposition of the content of the HTTP body.
+#[derive(Clone, Debug, PartialEq)]
+pub enum DispositionType {
+    /// Inline implies default processing
+    Inline,
+    /// Attachment implies that the recipient should prompt the user to save the response locally,
+    /// rather than process it normally (as per its media type).
+    Attachment,
+    /// Extension type.  Should be handled by recipients the same way as Attachment
+    Ext(String)
+}
+
+/// A parameter to the disposition type.
+#[derive(Clone, Debug, PartialEq)]
+pub enum DispositionParam {
+    /// A Filename consisting of a Charset, an optional LanguageTag, and finally a sequence of
+    /// bytes representing the filename
+    Filename(Charset, Option<LanguageTag>, Vec<u8>),
+    /// Extension type consisting of token and value.  Recipients should ignore unrecognized
+    /// parameters.
+    Ext(String, String)
+}
+
+/// A `Content-Disposition` header, (re)defined in [RFC6266](https://tools.ietf.org/html/rfc6266).
+///
+/// The Content-Disposition response header field is used to convey
+/// additional information about how to process the response payload, and
+/// also can be used to attach additional metadata, such as the filename
+/// to use when saving the response payload locally.
+///
+/// # ABNF
+
+/// ```text
+/// content-disposition = "Content-Disposition" ":"
+///                       disposition-type *( ";" disposition-parm )
+///
+/// disposition-type    = "inline" | "attachment" | disp-ext-type
+///                       ; case-insensitive
+///
+/// disp-ext-type       = token
+///
+/// disposition-parm    = filename-parm | disp-ext-parm
+///
+/// filename-parm       = "filename" "=" value
+///                     | "filename*" "=" ext-value
+///
+/// disp-ext-parm       = token "=" value
+///                     | ext-token "=" ext-value
+///
+/// ext-token           = <the characters in token, followed by "*">
+/// ```
+///
+/// # Example
+///
+/// ```
+/// use hyper::header::{Headers, ContentDisposition, DispositionType, DispositionParam, Charset};
+///
+/// let mut headers = Headers::new();
+/// headers.set(ContentDisposition {
+///     disposition: DispositionType::Attachment,
+///     parameters: vec![DispositionParam::Filename(
+///       Charset::Iso_8859_1, // The character set for the bytes of the filename
+///       None, // The optional language tag (see `language-tag` crate)
+///       b"\xa9 Copyright 1989.txt".to_vec() // the actual bytes of the filename
+///     )]
+/// });
+/// ```
+#[derive(Clone, Debug, PartialEq)]
+pub struct ContentDisposition {
+    /// The disposition
+    pub disposition: DispositionType,
+    /// Disposition parameters
+    pub parameters: Vec<DispositionParam>,
+}
+
+impl Header for ContentDisposition {
+    fn header_name() -> &'static str {
+        static NAME: &'static str = "Content-Disposition";
+        NAME
+    }
+
+    fn parse_header(raw: &Raw) -> ::Result<ContentDisposition> {
+        parsing::from_one_raw_str(raw).and_then(|s: String| {
+            let mut sections = s.split(';');
+            let disposition = match sections.next() {
+                Some(s) => s.trim(),
+                None => return Err(::Error::Header),
+            };
+
+            let mut cd = ContentDisposition {
+                disposition: if unicase::eq_ascii(&*disposition, "inline") {
+                    DispositionType::Inline
+                } else if unicase::eq_ascii(&*disposition, "attachment") {
+                    DispositionType::Attachment
+                } else {
+                    DispositionType::Ext(disposition.to_owned())
+                },
+                parameters: Vec::new(),
+            };
+
+            for section in sections {
+                let mut parts = section.splitn(2, '=');
+
+                let key = if let Some(key) = parts.next() {
+                    key.trim()
+                } else {
+                    return Err(::Error::Header);
+                };
+
+                let val = if let Some(val) = parts.next() {
+                    val.trim()
+                } else {
+                    return Err(::Error::Header);
+                };
+
+                cd.parameters.push(
+                    if unicase::eq_ascii(&*key, "filename") {
+                        DispositionParam::Filename(
+                            Charset::Ext("UTF-8".to_owned()), None,
+                            val.trim_matches('"').as_bytes().to_owned())
+                    } else if unicase::eq_ascii(&*key, "filename*") {
+                        let extended_value = try!(parse_extended_value(val));
+                        DispositionParam::Filename(extended_value.charset, extended_value.language_tag, extended_value.value)
+                    } else {
+                        DispositionParam::Ext(key.to_owned(), val.trim_matches('"').to_owned())
+                    }
+                );
+            }
+
+            Ok(cd)
+        })
+    }
+
+    #[inline]
+    fn fmt_header(&self, f: &mut ::header::Formatter) -> fmt::Result {
+        f.fmt_line(self)
+    }
+}
+
+impl fmt::Display for ContentDisposition {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self.disposition {
+            DispositionType::Inline => try!(write!(f, "inline")),
+            DispositionType::Attachment => try!(write!(f, "attachment")),
+            DispositionType::Ext(ref s) => try!(write!(f, "{}", s)),
+        }
+        for param in &self.parameters {
+            match *param {
+                DispositionParam::Filename(ref charset, ref opt_lang, ref bytes) => {
+                    let mut use_simple_format: bool = false;
+                    if opt_lang.is_none() {
+                        if let Charset::Ext(ref ext) = *charset {
+                            if unicase::eq_ascii(&**ext, "utf-8") {
+                                use_simple_format = true;
+                            }
+                        }
+                    }
+                    if use_simple_format {
+                        try!(write!(f, "; filename=\"{}\"",
+                                    match String::from_utf8(bytes.clone()) {
+                                        Ok(s) => s,
+                                        Err(_) => return Err(fmt::Error),
+                                    }));
+                    } else {
+                        try!(write!(f, "; filename*={}'", charset));
+                        if let Some(ref lang) = *opt_lang {
+                            try!(write!(f, "{}", lang));
+                        };
+                        try!(write!(f, "'"));
+                        try!(http_percent_encode(f, bytes))
+                    }
+                },
+                DispositionParam::Ext(ref k, ref v) => try!(write!(f, "; {}=\"{}\"", k, v)),
+            }
+        }
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{ContentDisposition,DispositionType,DispositionParam};
+    use ::header::Header;
+    use ::header::shared::Charset;
+
+    #[test]
+    fn test_parse_header() {
+        assert!(ContentDisposition::parse_header(&"".into()).is_err());
+
+        let a = "form-data; dummy=3; name=upload;\r\n filename=\"sample.png\"".into();
+        let a: ContentDisposition = ContentDisposition::parse_header(&a).unwrap();
+        let b = ContentDisposition {
+            disposition: DispositionType::Ext("form-data".to_owned()),
+            parameters: vec![
+                DispositionParam::Ext("dummy".to_owned(), "3".to_owned()),
+                DispositionParam::Ext("name".to_owned(), "upload".to_owned()),
+                DispositionParam::Filename(
+                    Charset::Ext("UTF-8".to_owned()),
+                    None,
+                    "sample.png".bytes().collect()) ]
+        };
+        assert_eq!(a, b);
+
+        let a = "attachment; filename=\"image.jpg\"".into();
+        let a: ContentDisposition = ContentDisposition::parse_header(&a).unwrap();
+        let b = ContentDisposition {
+            disposition: DispositionType::Attachment,
+            parameters: vec![
+                DispositionParam::Filename(
+                    Charset::Ext("UTF-8".to_owned()),
+                    None,
+                    "image.jpg".bytes().collect()) ]
+        };
+        assert_eq!(a, b);
+
+        let a = "attachment; filename*=UTF-8''%c2%a3%20and%20%e2%82%ac%20rates".into();
+        let a: ContentDisposition = ContentDisposition::parse_header(&a).unwrap();
+        let b = ContentDisposition {
+            disposition: DispositionType::Attachment,
+            parameters: vec![
+                DispositionParam::Filename(
+                    Charset::Ext("UTF-8".to_owned()),
+                    None,
+                    vec![0xc2, 0xa3, 0x20, b'a', b'n', b'd', 0x20,
+                         0xe2, 0x82, 0xac, 0x20, b'r', b'a', b't', b'e', b's']) ]
+        };
+        assert_eq!(a, b);
+    }
+
+    #[test]
+    fn test_display() {
+        let as_string = "attachment; filename*=UTF-8'en'%C2%A3%20and%20%E2%82%AC%20rates";
+        let a = as_string.into();
+        let a: ContentDisposition = ContentDisposition::parse_header(&a).unwrap();
+        let display_rendered = format!("{}",a);
+        assert_eq!(as_string, display_rendered);
+
+        let a = "attachment; filename*=UTF-8''black%20and%20white.csv".into();
+        let a: ContentDisposition = ContentDisposition::parse_header(&a).unwrap();
+        let display_rendered = format!("{}",a);
+        assert_eq!("attachment; filename=\"black and white.csv\"".to_owned(), display_rendered);
+
+        let a = "attachment; filename=colourful.csv".into();
+        let a: ContentDisposition = ContentDisposition::parse_header(&a).unwrap();
+        let display_rendered = format!("{}",a);
+        assert_eq!("attachment; filename=\"colourful.csv\"".to_owned(), display_rendered);
+    }
+}

src/header/common/content_language.rs

@@ -0,0 +1,66 @@
+use language_tags::LanguageTag;
+use header::{http, QualityItem};
+
+
+header! {
+    /// `Content-Language` header, defined in
+    /// [RFC7231](https://tools.ietf.org/html/rfc7231#section-3.1.3.2)
+    /// 
+    /// The `Content-Language` header field describes the natural language(s)
+    /// of the intended audience for the representation.  Note that this
+    /// might not be equivalent to all the languages used within the
+    /// representation.
+    /// 
+    /// # ABNF
+    ///
+    /// ```text
+    /// Content-Language = 1#language-tag
+    /// ```
+    /// 
+    /// # Example values
+    ///
+    /// * `da`
+    /// * `mi, en`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// # #[macro_use] extern crate language_tags;
+    /// use actix_web::httpcodes::HttpOk;
+    /// # use actix_web::header::{ContentLanguage, qitem};
+    /// # 
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     ContentLanguage(vec![
+    ///         qitem(langtag!(en)),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// # #[macro_use] extern crate language_tags;
+    /// use actix_web::httpcodes::HttpOk;
+    /// # use actix_web::header::{ContentLanguage, qitem};
+    /// #
+    /// # fn main() {
+    /// 
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     ContentLanguage(vec![
+    ///         qitem(langtag!(da)),
+    ///         qitem(langtag!(en;;;GB)),
+    ///     ])
+    /// );
+    /// # }
+    /// ```
+    (ContentLanguage, http::CONTENT_LANGUAGE) => (QualityItem<LanguageTag>)+
+
+    test_content_language {
+        test_header!(test1, vec![b"da"]);
+        test_header!(test2, vec![b"mi, en"]);
+    }
+}

src/header/common/content_range.rs

@@ -0,0 +1,205 @@
+use std::fmt::{self, Display, Write};
+use std::str::FromStr;
+use header::{http, IntoHeaderValue, Writer};
+use error::ParseError;
+
+
+header! {
+    /// `Content-Range` header, defined in
+    /// [RFC7233](http://tools.ietf.org/html/rfc7233#section-4.2)
+    (ContentRange, http::CONTENT_RANGE) => [ContentRangeSpec]
+
+    test_content_range {
+        test_header!(test_bytes,
+            vec![b"bytes 0-499/500"],
+            Some(ContentRange(ContentRangeSpec::Bytes {
+                range: Some((0, 499)),
+                instance_length: Some(500)
+            })));
+
+        test_header!(test_bytes_unknown_len,
+            vec![b"bytes 0-499/*"],
+            Some(ContentRange(ContentRangeSpec::Bytes {
+                range: Some((0, 499)),
+                instance_length: None
+            })));
+
+        test_header!(test_bytes_unknown_range,
+            vec![b"bytes */500"],
+            Some(ContentRange(ContentRangeSpec::Bytes {
+                range: None,
+                instance_length: Some(500)
+            })));
+
+        test_header!(test_unregistered,
+            vec![b"seconds 1-2"],
+            Some(ContentRange(ContentRangeSpec::Unregistered {
+                unit: "seconds".to_owned(),
+                resp: "1-2".to_owned()
+            })));
+
+        test_header!(test_no_len,
+            vec![b"bytes 0-499"],
+            None::<ContentRange>);
+
+        test_header!(test_only_unit,
+            vec![b"bytes"],
+            None::<ContentRange>);
+
+        test_header!(test_end_less_than_start,
+            vec![b"bytes 499-0/500"],
+            None::<ContentRange>);
+
+        test_header!(test_blank,
+            vec![b""],
+            None::<ContentRange>);
+
+        test_header!(test_bytes_many_spaces,
+            vec![b"bytes 1-2/500 3"],
+            None::<ContentRange>);
+
+        test_header!(test_bytes_many_slashes,
+            vec![b"bytes 1-2/500/600"],
+            None::<ContentRange>);
+
+        test_header!(test_bytes_many_dashes,
+            vec![b"bytes 1-2-3/500"],
+            None::<ContentRange>);
+
+    }
+}
+
+
+/// Content-Range, described in [RFC7233](https://tools.ietf.org/html/rfc7233#section-4.2)
+///
+/// # ABNF
+///
+/// ```text
+/// Content-Range       = byte-content-range
+///                     / other-content-range
+///
+/// byte-content-range  = bytes-unit SP
+///                       ( byte-range-resp / unsatisfied-range )
+///
+/// byte-range-resp     = byte-range "/" ( complete-length / "*" )
+/// byte-range          = first-byte-pos "-" last-byte-pos
+/// unsatisfied-range   = "*/" complete-length
+///
+/// complete-length     = 1*DIGIT
+///
+/// other-content-range = other-range-unit SP other-range-resp
+/// other-range-resp    = *CHAR
+/// ```
+#[derive(PartialEq, Clone, Debug)]
+pub enum ContentRangeSpec {
+    /// Byte range
+    Bytes {
+        /// First and last bytes of the range, omitted if request could not be
+        /// satisfied
+        range: Option<(u64, u64)>,
+
+        /// Total length of the instance, can be omitted if unknown
+        instance_length: Option<u64>
+    },
+
+    /// Custom range, with unit not registered at IANA
+    Unregistered {
+        /// other-range-unit
+        unit: String,
+
+        /// other-range-resp
+        resp: String
+    }
+}
+
+fn split_in_two(s: &str, separator: char) -> Option<(&str, &str)> {
+    let mut iter = s.splitn(2, separator);
+    match (iter.next(), iter.next()) {
+        (Some(a), Some(b)) => Some((a, b)),
+        _ => None
+    }
+}
+
+impl FromStr for ContentRangeSpec {
+    type Err = ParseError;
+
+    fn from_str(s: &str) -> Result<Self, ParseError> {
+        let res = match split_in_two(s, ' ') {
+            Some(("bytes", resp)) => {
+                let (range, instance_length) = split_in_two(
+                    resp, '/').ok_or(ParseError::Header)?;
+
+                let instance_length = if instance_length == "*" {
+                    None
+                } else {
+                    Some(instance_length.parse()
+                         .map_err(|_| ParseError::Header)?)
+                };
+
+                let range = if range == "*" {
+                    None
+                } else {
+                    let (first_byte, last_byte) = split_in_two(
+                        range, '-').ok_or(ParseError::Header)?;
+                    let first_byte = first_byte.parse()
+                        .map_err(|_| ParseError::Header)?;
+                    let last_byte = last_byte.parse()
+                        .map_err(|_| ParseError::Header)?;
+                    if last_byte < first_byte {
+                        return Err(ParseError::Header);
+                    }
+                    Some((first_byte, last_byte))
+                };
+
+                ContentRangeSpec::Bytes {range, instance_length}
+            }
+            Some((unit, resp)) => {
+                ContentRangeSpec::Unregistered {
+                    unit: unit.to_owned(),
+                    resp: resp.to_owned()
+                }
+            }
+            _ => return Err(ParseError::Header)
+        };
+        Ok(res)
+    }
+}
+
+impl Display for ContentRangeSpec {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            ContentRangeSpec::Bytes { range, instance_length } => {
+                try!(f.write_str("bytes "));
+                match range {
+                    Some((first_byte, last_byte)) => {
+                        try!(write!(f, "{}-{}", first_byte, last_byte));
+                    },
+                    None => {
+                        try!(f.write_str("*"));
+                    }
+                };
+                try!(f.write_str("/"));
+                if let Some(v) = instance_length {
+                    write!(f, "{}", v)
+                } else {
+                    f.write_str("*")
+                }
+            }
+            ContentRangeSpec::Unregistered { ref unit, ref resp } => {
+                try!(f.write_str(unit));
+                try!(f.write_str(" "));
+                f.write_str(resp)
+            }
+        }
+    }
+}
+
+impl IntoHeaderValue for ContentRangeSpec {
+    type Error = http::InvalidHeaderValueBytes;
+
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        let mut writer = Writer::new();
+        let _ = write!(&mut writer, "{}", self);
+        http::HeaderValue::from_shared(writer.take())
+    }
+}

src/header/common/content_type.rs

@@ -0,0 +1,119 @@
+use mime::{self, Mime};
+use header::http;
+
+
+header! {
+    /// `Content-Type` header, defined in
+    /// [RFC7231](http://tools.ietf.org/html/rfc7231#section-3.1.1.5)
+    ///
+    /// The `Content-Type` header field indicates the media type of the
+    /// associated representation: either the representation enclosed in the
+    /// message payload or the selected representation, as determined by the
+    /// message semantics.  The indicated media type defines both the data
+    /// format and how that data is intended to be processed by a recipient,
+    /// within the scope of the received message semantics, after any content
+    /// codings indicated by Content-Encoding are decoded.
+    ///
+    /// Although the `mime` crate allows the mime options to be any slice, this crate
+    /// forces the use of Vec. This is to make sure the same header can't have more than 1 type. If
+    /// this is an issue, it's possible to implement `Header` on a custom struct.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Content-Type = media-type
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `text/html; charset=utf-8`
+    /// * `application/json`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::ContentType;
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     ContentType::json()
+    /// );
+    /// # }
+    /// ```
+    ///
+    /// ```rust
+    /// # extern crate mime;
+    /// # extern crate actix_web;
+    /// use mime::TEXT_HTML;
+    /// use actix_web::httpcodes::HttpOk;
+    /// use actix_web::header::ContentType;
+    ///
+    /// # fn main() {
+    /// let mut builder = HttpOk.build();
+    /// builder.set(
+    ///     ContentType(TEXT_HTML)
+    /// );
+    /// # }
+    /// ```
+    (ContentType, http::CONTENT_TYPE) => [Mime]
+
+    test_content_type {
+        test_header!(
+            test1,
+            vec![b"text/html"],
+            Some(HeaderField(TEXT_HTML)));
+    }
+}
+
+impl ContentType {
+    /// A constructor  to easily create a `Content-Type: application/json` header.
+    #[inline]
+    pub fn json() -> ContentType {
+        ContentType(mime::APPLICATION_JSON)
+    }
+
+    /// A constructor  to easily create a `Content-Type: text/plain; charset=utf-8` header.
+    #[inline]
+    pub fn plaintext() -> ContentType {
+        ContentType(mime::TEXT_PLAIN_UTF_8)
+    }
+
+    /// A constructor  to easily create a `Content-Type: text/html` header.
+    #[inline]
+    pub fn html() -> ContentType {
+        ContentType(mime::TEXT_HTML)
+    }
+
+    /// A constructor  to easily create a `Content-Type: text/xml` header.
+    #[inline]
+    pub fn xml() -> ContentType {
+        ContentType(mime::TEXT_XML)
+    }
+
+    /// A constructor  to easily create a `Content-Type: application/www-form-url-encoded` header.
+    #[inline]
+    pub fn form_url_encoded() -> ContentType {
+        ContentType(mime::APPLICATION_WWW_FORM_URLENCODED)
+    }
+    /// A constructor  to easily create a `Content-Type: image/jpeg` header.
+    #[inline]
+    pub fn jpeg() -> ContentType {
+        ContentType(mime::IMAGE_JPEG)
+    }
+
+    /// A constructor  to easily create a `Content-Type: image/png` header.
+    #[inline]
+    pub fn png() -> ContentType {
+        ContentType(mime::IMAGE_PNG)
+    }
+
+    /// A constructor  to easily create a `Content-Type: application/octet-stream` header.
+    #[inline]
+    pub fn octet_stream() -> ContentType {
+        ContentType(mime::APPLICATION_OCTET_STREAM)
+    }
+}
+
+impl Eq for ContentType {}

src/header/common/date.rs

@@ -0,0 +1,34 @@
+use header::{http, HttpDate};
+
+header! {
+    /// `Date` header, defined in [RFC7231](http://tools.ietf.org/html/rfc7231#section-7.1.1.2)
+    ///
+    /// The `Date` header field represents the date and time at which the
+    /// message was originated.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Date = HTTP-date
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `Tue, 15 Nov 1994 08:12:31 GMT`
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::Date;
+    /// use std::time::SystemTime;
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(Date(SystemTime::now().into()));
+    /// ```
+    (Date, http::DATE) => [HttpDate]
+
+    test_date {
+        test_header!(test1, vec![b"Tue, 15 Nov 1994 08:12:31 GMT"]);
+    }
+}

src/header/common/etag.rs

@@ -0,0 +1,96 @@
+use header::{http, EntityTag};
+
+header! {
+    /// `ETag` header, defined in [RFC7232](http://tools.ietf.org/html/rfc7232#section-2.3)
+    ///
+    /// The `ETag` header field in a response provides the current entity-tag
+    /// for the selected representation, as determined at the conclusion of
+    /// handling the request.  An entity-tag is an opaque validator for
+    /// differentiating between multiple representations of the same
+    /// resource, regardless of whether those multiple representations are
+    /// due to resource state changes over time, content negotiation
+    /// resulting in multiple representations being valid at the same time,
+    /// or both.  An entity-tag consists of an opaque quoted string, possibly
+    /// prefixed by a weakness indicator.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// ETag       = entity-tag
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `"xyzzy"`
+    /// * `W/"xyzzy"`
+    /// * `""`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::{ETag, EntityTag};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(ETag(EntityTag::new(false, "xyzzy".to_owned())));
+    /// ```
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::{ETag, EntityTag};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(ETag(EntityTag::new(true, "xyzzy".to_owned())));
+    /// ```
+    (ETag, http::ETAG) => [EntityTag]
+
+    test_etag {
+        // From the RFC
+        test_header!(test1,
+            vec![b"\"xyzzy\""],
+            Some(ETag(EntityTag::new(false, "xyzzy".to_owned()))));
+        test_header!(test2,
+            vec![b"W/\"xyzzy\""],
+            Some(ETag(EntityTag::new(true, "xyzzy".to_owned()))));
+        test_header!(test3,
+            vec![b"\"\""],
+            Some(ETag(EntityTag::new(false, "".to_owned()))));
+        // Own tests
+        test_header!(test4,
+            vec![b"\"foobar\""],
+            Some(ETag(EntityTag::new(false, "foobar".to_owned()))));
+        test_header!(test5,
+            vec![b"\"\""],
+            Some(ETag(EntityTag::new(false, "".to_owned()))));
+        test_header!(test6,
+            vec![b"W/\"weak-etag\""],
+            Some(ETag(EntityTag::new(true, "weak-etag".to_owned()))));
+        test_header!(test7,
+            vec![b"W/\"\x65\x62\""],
+            Some(ETag(EntityTag::new(true, "\u{0065}\u{0062}".to_owned()))));
+        test_header!(test8,
+            vec![b"W/\"\""],
+            Some(ETag(EntityTag::new(true, "".to_owned()))));
+        test_header!(test9,
+            vec![b"no-dquotes"],
+            None::<ETag>);
+        test_header!(test10,
+            vec![b"w/\"the-first-w-is-case-sensitive\""],
+            None::<ETag>);
+        test_header!(test11,
+            vec![b""],
+            None::<ETag>);
+        test_header!(test12,
+            vec![b"\"unmatched-dquotes1"],
+            None::<ETag>);
+        test_header!(test13,
+            vec![b"unmatched-dquotes2\""],
+            None::<ETag>);
+        test_header!(test14,
+            vec![b"matched-\"dquotes\""],
+            None::<ETag>);
+        test_header!(test15,
+            vec![b"\""],
+            None::<ETag>);
+    }
+}

src/header/common/expires.rs

@@ -0,0 +1,39 @@
+use header::{http, HttpDate};
+
+header! {
+    /// `Expires` header, defined in [RFC7234](http://tools.ietf.org/html/rfc7234#section-5.3)
+    ///
+    /// The `Expires` header field gives the date/time after which the
+    /// response is considered stale.
+    ///
+    /// The presence of an Expires field does not imply that the original
+    /// resource will change or cease to exist at, before, or after that
+    /// time.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Expires = HTTP-date
+    /// ```
+    ///
+    /// # Example values
+    /// * `Thu, 01 Dec 1994 16:00:00 GMT`
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::Expires;
+    /// use std::time::{SystemTime, Duration};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// let expiration = SystemTime::now() + Duration::from_secs(60 * 60 * 24);
+    /// builder.set(Expires(expiration.into()));
+    /// ```
+    (Expires, http::EXPIRES) => [HttpDate]
+
+    test_expires {
+        // Testcase from RFC
+        test_header!(test1, vec![b"Thu, 01 Dec 1994 16:00:00 GMT"]);
+    }
+}

src/header/common/if_match.rs

@@ -0,0 +1,70 @@
+use header::{http, EntityTag};
+
+header! {
+    /// `If-Match` header, defined in
+    /// [RFC7232](https://tools.ietf.org/html/rfc7232#section-3.1)
+    ///
+    /// The `If-Match` header field makes the request method conditional on
+    /// the recipient origin server either having at least one current
+    /// representation of the target resource, when the field-value is "*",
+    /// or having a current representation of the target resource that has an
+    /// entity-tag matching a member of the list of entity-tags provided in
+    /// the field-value.
+    ///
+    /// An origin server MUST use the strong comparison function when
+    /// comparing entity-tags for `If-Match`, since the client
+    /// intends this precondition to prevent the method from being applied if
+    /// there have been any changes to the representation data.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// If-Match = "*" / 1#entity-tag
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `"xyzzy"`
+    /// * "xyzzy", "r2d2xxxx", "c3piozzzz"
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::IfMatch;
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(IfMatch::Any);
+    /// ```
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::{IfMatch, EntityTag};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(
+    ///     IfMatch::Items(vec![
+    ///         EntityTag::new(false, "xyzzy".to_owned()),
+    ///         EntityTag::new(false, "foobar".to_owned()),
+    ///         EntityTag::new(false, "bazquux".to_owned()),
+    ///     ])
+    /// );
+    /// ```
+    (IfMatch, http::IF_MATCH) => {Any / (EntityTag)+}
+
+    test_if_match {
+        test_header!(
+            test1,
+            vec![b"\"xyzzy\""],
+            Some(HeaderField::Items(
+                vec![EntityTag::new(false, "xyzzy".to_owned())])));
+        test_header!(
+            test2,
+            vec![b"\"xyzzy\", \"r2d2xxxx\", \"c3piozzzz\""],
+            Some(HeaderField::Items(
+                vec![EntityTag::new(false, "xyzzy".to_owned()),
+                     EntityTag::new(false, "r2d2xxxx".to_owned()),
+                     EntityTag::new(false, "c3piozzzz".to_owned())])));
+        test_header!(test3, vec![b"*"], Some(IfMatch::Any));
+    }
+}

src/header/common/if_modified_since.rs

@@ -0,0 +1,39 @@
+use header::{http, HttpDate};
+
+header! {
+    /// `If-Modified-Since` header, defined in
+    /// [RFC7232](http://tools.ietf.org/html/rfc7232#section-3.3)
+    ///
+    /// The `If-Modified-Since` header field makes a GET or HEAD request
+    /// method conditional on the selected representation's modification date
+    /// being more recent than the date provided in the field-value.
+    /// Transfer of the selected representation's data is avoided if that
+    /// data has not changed.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// If-Unmodified-Since = HTTP-date
+    /// ```
+    ///
+    /// # Example values
+    /// * `Sat, 29 Oct 1994 19:43:31 GMT`
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::IfModifiedSince;
+    /// use std::time::{SystemTime, Duration};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// let modified = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
+    /// builder.set(IfModifiedSince(modified.into()));
+    /// ```
+    (IfModifiedSince, http::IF_MODIFIED_SINCE) => [HttpDate]
+
+    test_if_modified_since {
+        // Testcase from RFC
+        test_header!(test1, vec![b"Sat, 29 Oct 1994 19:43:31 GMT"]);
+    }
+}

src/header/common/if_none_match.rs

@@ -0,0 +1,91 @@
+use header::{http, EntityTag};
+
+header! {
+    /// `If-None-Match` header, defined in
+    /// [RFC7232](https://tools.ietf.org/html/rfc7232#section-3.2)
+    ///
+    /// The `If-None-Match` header field makes the request method conditional
+    /// on a recipient cache or origin server either not having any current
+    /// representation of the target resource, when the field-value is "*",
+    /// or having a selected representation with an entity-tag that does not
+    /// match any of those listed in the field-value.
+    ///
+    /// A recipient MUST use the weak comparison function when comparing
+    /// entity-tags for If-None-Match (Section 2.3.2), since weak entity-tags
+    /// can be used for cache validation even if there have been changes to
+    /// the representation data.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// If-None-Match = "*" / 1#entity-tag
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `"xyzzy"`
+    /// * `W/"xyzzy"`
+    /// * `"xyzzy", "r2d2xxxx", "c3piozzzz"`
+    /// * `W/"xyzzy", W/"r2d2xxxx", W/"c3piozzzz"`
+    /// * `*`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::IfNoneMatch;
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(IfNoneMatch::Any);
+    /// ```
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::{IfNoneMatch, EntityTag};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// builder.set(
+    ///     IfNoneMatch::Items(vec![
+    ///         EntityTag::new(false, "xyzzy".to_owned()),
+    ///         EntityTag::new(false, "foobar".to_owned()),
+    ///         EntityTag::new(false, "bazquux".to_owned()),
+    ///     ])
+    /// );
+    /// ```
+    (IfNoneMatch, http::IF_NONE_MATCH) => {Any / (EntityTag)+}
+
+    test_if_none_match {
+        test_header!(test1, vec![b"\"xyzzy\""]);
+        test_header!(test2, vec![b"W/\"xyzzy\""]);
+        test_header!(test3, vec![b"\"xyzzy\", \"r2d2xxxx\", \"c3piozzzz\""]);
+        test_header!(test4, vec![b"W/\"xyzzy\", W/\"r2d2xxxx\", W/\"c3piozzzz\""]);
+        test_header!(test5, vec![b"*"]);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::IfNoneMatch;
+    use test::TestRequest;
+    use header::{http, Header, EntityTag};
+
+    #[test]
+    fn test_if_none_match() {
+        let mut if_none_match: Result<IfNoneMatch, _>;
+
+        let req = TestRequest::with_header(http::IF_NONE_MATCH, "*").finish();
+        if_none_match = Header::parse(&req);
+        assert_eq!(if_none_match.ok(), Some(IfNoneMatch::Any));
+
+        let req = TestRequest::with_header(
+            http::IF_NONE_MATCH, &b"\"foobar\", W/\"weak-etag\""[..]).finish();
+
+        if_none_match = Header::parse(&req);
+        let mut entities: Vec<EntityTag> = Vec::new();
+        let foobar_etag = EntityTag::new(false, "foobar".to_owned());
+        let weak_etag = EntityTag::new(true, "weak-etag".to_owned());
+        entities.push(foobar_etag);
+        entities.push(weak_etag);
+        assert_eq!(if_none_match.ok(), Some(IfNoneMatch::Items(entities)));
+    }
+}

src/header/common/if_range.rs

@@ -0,0 +1,107 @@
+use std::fmt::{self, Display, Write};
+use error::ParseError;
+use httpmessage::HttpMessage;
+use header::{http, from_one_raw_str};
+use header::{IntoHeaderValue, Header, EntityTag, HttpDate, Writer};
+
+/// `If-Range` header, defined in [RFC7233](http://tools.ietf.org/html/rfc7233#section-3.2)
+///
+/// If a client has a partial copy of a representation and wishes to have
+/// an up-to-date copy of the entire representation, it could use the
+/// Range header field with a conditional GET (using either or both of
+/// If-Unmodified-Since and If-Match.)  However, if the precondition
+/// fails because the representation has been modified, the client would
+/// then have to make a second request to obtain the entire current
+/// representation.
+///
+/// The `If-Range` header field allows a client to \"short-circuit\" the
+/// second request.  Informally, its meaning is as follows: if the
+/// representation is unchanged, send me the part(s) that I am requesting
+/// in Range; otherwise, send me the entire representation.
+///
+/// # ABNF
+///
+/// ```text
+/// If-Range = entity-tag / HTTP-date
+/// ```
+///
+/// # Example values
+///
+/// * `Sat, 29 Oct 1994 19:43:31 GMT`
+/// * `\"xyzzy\"`
+///
+/// # Examples
+///
+/// ```rust
+/// use actix_web::httpcodes;
+/// use actix_web::header::{IfRange, EntityTag};
+///
+/// let mut builder = httpcodes::HttpOk.build();
+/// builder.set(IfRange::EntityTag(EntityTag::new(false, "xyzzy".to_owned())));
+/// ```
+///
+/// ```rust
+/// use actix_web::httpcodes;
+/// use actix_web::header::IfRange;
+/// use std::time::{SystemTime, Duration};
+///
+/// let mut builder = httpcodes::HttpOk.build();
+/// let fetched = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
+/// builder.set(IfRange::Date(fetched.into()));
+/// ```
+#[derive(Clone, Debug, PartialEq)]
+pub enum IfRange {
+    /// The entity-tag the client has of the resource
+    EntityTag(EntityTag),
+    /// The date when the client retrieved the resource
+    Date(HttpDate),
+}
+
+impl Header for IfRange {
+    fn name() -> http::HeaderName {
+        http::IF_RANGE
+    }
+    #[inline]
+    fn parse<T>(msg: &T) -> Result<Self, ParseError> where T: HttpMessage
+    {
+        let etag: Result<EntityTag, _> = from_one_raw_str(msg.headers().get(http::IF_RANGE));
+        if let Ok(etag) = etag {
+            return Ok(IfRange::EntityTag(etag));
+        }
+        let date: Result<HttpDate, _> = from_one_raw_str(msg.headers().get(http::IF_RANGE));
+        if let Ok(date) = date {
+            return Ok(IfRange::Date(date));
+        }
+        Err(ParseError::Header)
+    }
+}
+
+impl Display for IfRange {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            IfRange::EntityTag(ref x) => Display::fmt(x, f),
+            IfRange::Date(ref x) => Display::fmt(x, f),
+        }
+    }
+}
+
+impl IntoHeaderValue for IfRange {
+    type Error = http::InvalidHeaderValueBytes;
+
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        let mut writer = Writer::new();
+        let _ = write!(&mut writer, "{}", self);
+        http::HeaderValue::from_shared(writer.take())
+    }
+}
+
+
+#[cfg(test)]
+mod test_if_range {
+    use std::str;
+    use header::*;
+    use super::IfRange as HeaderField;
+    test_header!(test1, vec![b"Sat, 29 Oct 1994 19:43:31 GMT"]);
+    test_header!(test2, vec![b"\"xyzzy\""]);
+    test_header!(test3, vec![b"this-is-invalid"], None::<IfRange>);
+}

src/header/common/if_unmodified_since.rs

@@ -0,0 +1,40 @@
+use header::{http, HttpDate};
+
+header! {
+    /// `If-Unmodified-Since` header, defined in
+    /// [RFC7232](http://tools.ietf.org/html/rfc7232#section-3.4)
+    ///
+    /// The `If-Unmodified-Since` header field makes the request method
+    /// conditional on the selected representation's last modification date
+    /// being earlier than or equal to the date provided in the field-value.
+    /// This field accomplishes the same purpose as If-Match for cases where
+    /// the user agent does not have an entity-tag for the representation.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// If-Unmodified-Since = HTTP-date
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `Sat, 29 Oct 1994 19:43:31 GMT`
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::IfUnmodifiedSince;
+    /// use std::time::{SystemTime, Duration};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// let modified = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
+    /// builder.set(IfUnmodifiedSince(modified.into()));
+    /// ```
+    (IfUnmodifiedSince, http::IF_UNMODIFIED_SINCE) => [HttpDate]
+
+    test_if_unmodified_since {
+        // Testcase from RFC
+        test_header!(test1, vec![b"Sat, 29 Oct 1994 19:43:31 GMT"]);
+    }
+}

src/header/common/last_modified.rs

@@ -0,0 +1,38 @@
+use header::{http, HttpDate};
+
+header! {
+    /// `Last-Modified` header, defined in
+    /// [RFC7232](http://tools.ietf.org/html/rfc7232#section-2.2)
+    ///
+    /// The `Last-Modified` header field in a response provides a timestamp
+    /// indicating the date and time at which the origin server believes the
+    /// selected representation was last modified, as determined at the
+    /// conclusion of handling the request.
+    ///
+    /// # ABNF
+    ///
+    /// ```text
+    /// Expires = HTTP-date
+    /// ```
+    ///
+    /// # Example values
+    ///
+    /// * `Sat, 29 Oct 1994 19:43:31 GMT`
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use actix_web::httpcodes;
+    /// use actix_web::header::LastModified;
+    /// use std::time::{SystemTime, Duration};
+    ///
+    /// let mut builder = httpcodes::HttpOk.build();
+    /// let modified = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
+    /// builder.set(LastModified(modified.into()));
+    /// ```
+    (LastModified, http::LAST_MODIFIED) => [HttpDate]
+
+        test_last_modified {
+            // Testcase from RFC
+            test_header!(test1, vec![b"Sat, 29 Oct 1994 19:43:31 GMT"]);}
+}

src/header/common/mod.rs

@@ -0,0 +1,351 @@
+//! A Collection of Header implementations for common HTTP Headers.
+//!
+//! ## Mime
+//!
+//! Several header fields use MIME values for their contents. Keeping with the
+//! strongly-typed theme, the [mime](https://docs.rs/mime) crate
+//! is used, such as `ContentType(pub Mime)`.
+
+pub use self::accept_charset::AcceptCharset;
+//pub use self::accept_encoding::AcceptEncoding;
+pub use self::accept_language::AcceptLanguage;
+pub use self::accept::Accept;
+pub use self::allow::Allow;
+pub use self::cache_control::{CacheControl, CacheDirective};
+//pub use self::content_disposition::{ContentDisposition, DispositionType, DispositionParam};
+pub use self::content_language::ContentLanguage;
+pub use self::content_range::{ContentRange, ContentRangeSpec};
+pub use self::content_type::ContentType;
+pub use self::date::Date;
+pub use self::etag::ETag;
+pub use self::expires::Expires;
+pub use self::if_match::IfMatch;
+pub use self::if_modified_since::IfModifiedSince;
+pub use self::if_none_match::IfNoneMatch;
+pub use self::if_range::IfRange;
+pub use self::if_unmodified_since::IfUnmodifiedSince;
+pub use self::last_modified::LastModified;
+//pub use self::range::{Range, ByteRangeSpec};
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __hyper__deref {
+    ($from:ty => $to:ty) => {
+        impl ::std::ops::Deref for $from {
+            type Target = $to;
+
+            #[inline]
+            fn deref(&self) -> &$to {
+                &self.0
+            }
+        }
+
+        impl ::std::ops::DerefMut for $from {
+            #[inline]
+            fn deref_mut(&mut self) -> &mut $to {
+                &mut self.0
+            }
+        }
+    }
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __hyper__tm {
+    ($id:ident, $tm:ident{$($tf:item)*}) => {
+        #[allow(unused_imports)]
+        #[cfg(test)]
+        mod $tm{
+            use std::str;
+            use http::Method;
+            use $crate::header::*;
+            use $crate::mime::*;
+            use super::$id as HeaderField;
+            $($tf)*
+        }
+
+    }
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! test_header {
+    ($id:ident, $raw:expr) => {
+        #[test]
+        fn $id() {
+            #[allow(unused)]
+            use std::ascii::AsciiExt;
+            use test;
+            let raw = $raw;
+            let a: Vec<Vec<u8>> = raw.iter().map(|x| x.to_vec()).collect();
+            let mut req = test::TestRequest::default();
+            for item in a {
+                req = req.header(HeaderField::name(), item);
+            }
+            let req = req.finish();
+            let value = HeaderField::parse(&req);
+            let result = format!("{}", value.unwrap());
+            let expected = String::from_utf8(raw[0].to_vec()).unwrap();
+            let result_cmp: Vec<String> = result
+                .to_ascii_lowercase()
+                .split(' ')
+                .map(|x| x.to_owned())
+                .collect();
+            let expected_cmp: Vec<String> = expected
+                .to_ascii_lowercase()
+                .split(' ')
+                .map(|x| x.to_owned())
+                .collect();
+            assert_eq!(result_cmp.concat(), expected_cmp.concat());
+        }
+    };
+    ($id:ident, $raw:expr, $typed:expr) => {
+        #[test]
+        fn $id() {
+            use $crate::test;
+            let a: Vec<Vec<u8>> = $raw.iter().map(|x| x.to_vec()).collect();
+            let mut req = test::TestRequest::default();
+            for item in a {
+                req = req.header(HeaderField::name(), item);
+            }
+            let req = req.finish();
+            let val = HeaderField::parse(&req);
+            let typed: Option<HeaderField> = $typed;
+            // Test parsing
+            assert_eq!(val.ok(), typed);
+            // Test formatting
+            if typed.is_some() {
+                let raw = &($raw)[..];
+                let mut iter = raw.iter().map(|b|str::from_utf8(&b[..]).unwrap());
+                let mut joined = String::new();
+                joined.push_str(iter.next().unwrap());
+                for s in iter {
+                    joined.push_str(", ");
+                    joined.push_str(s);
+                }
+                assert_eq!(format!("{}", typed.unwrap()), joined);
+            }
+        }
+    }
+}
+
+#[macro_export]
+macro_rules! header {
+    // $a:meta: Attributes associated with the header item (usually docs)
+    // $id:ident: Identifier of the header
+    // $n:expr: Lowercase name of the header
+    // $nn:expr: Nice name of the header
+
+    // List header, zero or more items
+    ($(#[$a:meta])*($id:ident, $name:expr) => ($item:ty)*) => {
+        $(#[$a])*
+        #[derive(Clone, Debug, PartialEq)]
+        pub struct $id(pub Vec<$item>);
+        __hyper__deref!($id => Vec<$item>);
+        impl $crate::header::Header for $id {
+            #[inline]
+            fn name() -> $crate::header::http::HeaderName {
+                $name
+            }
+            #[inline]
+            fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
+                where T: $crate::HttpMessage
+            {
+                $crate::header::from_comma_delimited(
+                    msg.headers().get_all(Self::name())).map($id)
+            }
+        }
+        impl ::std::fmt::Display for $id {
+            #[inline]
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                $crate::header::fmt_comma_delimited(f, &self.0[..])
+            }
+        }
+        impl $crate::header::IntoHeaderValue for $id {
+            type Error = $crate::header::http::InvalidHeaderValueBytes;
+
+            fn try_into(self) -> Result<$crate::header::http::HeaderValue, Self::Error> {
+                use std::fmt::Write;
+                let mut writer = $crate::header::Writer::new();
+                let _ = write!(&mut writer, "{}", self);
+                $crate::header::http::HeaderValue::from_shared(writer.take())
+            }
+        }
+    };
+    // List header, one or more items
+    ($(#[$a:meta])*($id:ident, $name:expr) => ($item:ty)+) => {
+        $(#[$a])*
+        #[derive(Clone, Debug, PartialEq)]
+        pub struct $id(pub Vec<$item>);
+        __hyper__deref!($id => Vec<$item>);
+        impl $crate::header::Header for $id {
+            #[inline]
+            fn name() -> $crate::header::http::HeaderName {
+                $name
+            }
+            #[inline]
+            fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
+                where T: $crate::HttpMessage
+            {
+                $crate::header::from_comma_delimited(
+                    msg.headers().get_all(Self::name())).map($id)
+            }
+        }
+        impl ::std::fmt::Display for $id {
+            #[inline]
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                $crate::header::fmt_comma_delimited(f, &self.0[..])
+            }
+        }
+        impl $crate::header::IntoHeaderValue for $id {
+            type Error = $crate::header::http::InvalidHeaderValueBytes;
+
+            fn try_into(self) -> Result<$crate::header::http::HeaderValue, Self::Error> {
+                use std::fmt::Write;
+                let mut writer = $crate::header::Writer::new();
+                let _ = write!(&mut writer, "{}", self);
+                $crate::header::http::HeaderValue::from_shared(writer.take())
+            }
+        }
+    };
+    // Single value header
+    ($(#[$a:meta])*($id:ident, $name:expr) => [$value:ty]) => {
+        $(#[$a])*
+        #[derive(Clone, Debug, PartialEq)]
+        pub struct $id(pub $value);
+        __hyper__deref!($id => $value);
+        impl $crate::header::Header for $id {
+            #[inline]
+            fn name() -> $crate::header::http::HeaderName {
+                $name
+            }
+            #[inline]
+            fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
+                where T: $crate::HttpMessage
+            {
+                $crate::header::from_one_raw_str(
+                    msg.headers().get(Self::name())).map($id)
+            }
+        }
+        impl ::std::fmt::Display for $id {
+            #[inline]
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                ::std::fmt::Display::fmt(&self.0, f)
+            }
+        }
+        impl $crate::header::IntoHeaderValue for $id {
+            type Error = $crate::header::http::InvalidHeaderValueBytes;
+
+            fn try_into(self) -> Result<$crate::header::http::HeaderValue, Self::Error> {
+                self.0.try_into()
+            }
+        }
+    };
+    // List header, one or more items with "*" option
+    ($(#[$a:meta])*($id:ident, $name:expr) => {Any / ($item:ty)+}) => {
+        $(#[$a])*
+        #[derive(Clone, Debug, PartialEq)]
+        pub enum $id {
+            /// Any value is a match
+            Any,
+            /// Only the listed items are a match
+            Items(Vec<$item>),
+        }
+        impl $crate::header::Header for $id {
+            #[inline]
+            fn name() -> $crate::header::http::HeaderName {
+                $name
+            }
+            #[inline]
+            fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
+                where T: $crate::header::HttpMessage
+            {
+                let any = msg.headers().get(Self::name()).and_then(|hdr| {
+                    hdr.to_str().ok().and_then(|hdr| Some(hdr.trim() == "*"))});
+
+                if let Some(true) = any {
+                    Ok($id::Any)
+                } else {
+                    Ok($id::Items(
+                        $crate::header::from_comma_delimited(
+                            msg.headers().get_all(Self::name()))?))
+                }
+            }
+        }
+        impl ::std::fmt::Display for $id {
+            #[inline]
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                match *self {
+                    $id::Any => f.write_str("*"),
+                    $id::Items(ref fields) => $crate::header::fmt_comma_delimited(
+                        f, &fields[..])
+                }
+            }
+        }
+        impl $crate::header::IntoHeaderValue for $id {
+            type Error = $crate::header::http::InvalidHeaderValueBytes;
+
+            fn try_into(self) -> Result<$crate::header::http::HeaderValue, Self::Error> {
+                use std::fmt::Write;
+                let mut writer = $crate::header::Writer::new();
+                let _ = write!(&mut writer, "{}", self);
+                $crate::header::http::HeaderValue::from_shared(writer.take())
+            }
+        }
+    };
+
+    // optional test module
+    ($(#[$a:meta])*($id:ident, $name:expr) => ($item:ty)* $tm:ident{$($tf:item)*}) => {
+        header! {
+            $(#[$a])*
+            ($id, $name) => ($item)*
+        }
+
+        __hyper__tm! { $id, $tm { $($tf)* }}
+    };
+    ($(#[$a:meta])*($id:ident, $n:expr) => ($item:ty)+ $tm:ident{$($tf:item)*}) => {
+        header! {
+            $(#[$a])*
+            ($id, $n) => ($item)+
+        }
+
+        __hyper__tm! { $id, $tm { $($tf)* }}
+    };
+    ($(#[$a:meta])*($id:ident, $name:expr) => [$item:ty] $tm:ident{$($tf:item)*}) => {
+        header! {
+            $(#[$a])* ($id, $name) => [$item]
+        }
+
+        __hyper__tm! { $id, $tm { $($tf)* }}
+    };
+    ($(#[$a:meta])*($id:ident, $name:expr) => {Any / ($item:ty)+} $tm:ident{$($tf:item)*}) => {
+        header! {
+            $(#[$a])*
+            ($id, $name) => {Any / ($item)+}
+        }
+
+        __hyper__tm! { $id, $tm { $($tf)* }}
+    };
+}
+
+
+mod accept_charset;
+//mod accept_encoding;
+mod accept_language;
+mod accept;
+mod allow;
+mod cache_control;
+//mod content_disposition;
+mod content_language;
+mod content_range;
+mod content_type;
+mod date;
+mod etag;
+mod expires;
+mod if_match;
+mod if_modified_since;
+mod if_none_match;
+mod if_range;
+mod if_unmodified_since;
+mod last_modified;
+//mod range;

src/header/common/range.rs

@@ -0,0 +1,387 @@
+use std::fmt::{self, Display};
+use std::str::FromStr;
+
+use header::{Header, Raw};
+use header::parsing::{from_one_raw_str};
+
+/// `Range` header, defined in [RFC7233](https://tools.ietf.org/html/rfc7233#section-3.1)
+///
+/// The "Range" header field on a GET request modifies the method
+/// semantics to request transfer of only one or more subranges of the
+/// selected representation data, rather than the entire selected
+/// representation data.
+///
+/// # ABNF
+///
+/// ```text
+/// Range =	byte-ranges-specifier / other-ranges-specifier
+/// other-ranges-specifier = other-range-unit "=" other-range-set
+/// other-range-set = 1*VCHAR
+///
+/// bytes-unit = "bytes"
+///
+/// byte-ranges-specifier = bytes-unit "=" byte-range-set
+/// byte-range-set = 1#(byte-range-spec / suffix-byte-range-spec)
+/// byte-range-spec = first-byte-pos "-" [last-byte-pos]
+/// first-byte-pos = 1*DIGIT
+/// last-byte-pos = 1*DIGIT
+/// ```
+///
+/// # Example values
+///
+/// * `bytes=1000-`
+/// * `bytes=-2000`
+/// * `bytes=0-1,30-40`
+/// * `bytes=0-10,20-90,-100`
+/// * `custom_unit=0-123`
+/// * `custom_unit=xxx-yyy`
+///
+/// # Examples
+///
+/// ```
+/// use hyper::header::{Headers, Range, ByteRangeSpec};
+///
+/// let mut headers = Headers::new();
+/// headers.set(Range::Bytes(
+///     vec![ByteRangeSpec::FromTo(1, 100), ByteRangeSpec::AllFrom(200)]
+/// ));
+///
+/// headers.clear();
+/// headers.set(Range::Unregistered("letters".to_owned(), "a-f".to_owned()));
+/// ```
+///
+/// ```
+/// use hyper::header::{Headers, Range};
+///
+/// let mut headers = Headers::new();
+/// headers.set(Range::bytes(1, 100));
+///
+/// headers.clear();
+/// headers.set(Range::bytes_multi(vec![(1, 100), (200, 300)]));
+/// ```
+#[derive(PartialEq, Clone, Debug)]
+pub enum Range {
+    /// Byte range
+    Bytes(Vec<ByteRangeSpec>),
+    /// Custom range, with unit not registered at IANA
+    /// (`other-range-unit`: String , `other-range-set`: String)
+    Unregistered(String, String)
+}
+
+/// Each `Range::Bytes` header can contain one or more `ByteRangeSpecs`.
+/// Each `ByteRangeSpec` defines a range of bytes to fetch
+#[derive(PartialEq, Clone, Debug)]
+pub enum ByteRangeSpec {
+    /// Get all bytes between x and y ("x-y")
+    FromTo(u64, u64),
+    /// Get all bytes starting from x ("x-")
+    AllFrom(u64),
+    /// Get last x bytes ("-x")
+    Last(u64)
+}
+
+impl ByteRangeSpec {
+    /// Given the full length of the entity, attempt to normalize the byte range
+    /// into an satisfiable end-inclusive (from, to) range.
+    ///
+    /// The resulting range is guaranteed to be a satisfiable range within the bounds
+    /// of `0 <= from <= to < full_length`.
+    ///
+    /// If the byte range is deemed unsatisfiable, `None` is returned.
+    /// An unsatisfiable range is generally cause for a server to either reject
+    /// the client request with a `416 Range Not Satisfiable` status code, or to
+    /// simply ignore the range header and serve the full entity using a `200 OK`
+    /// status code.
+    ///
+    /// This function closely follows [RFC 7233][1] section 2.1.
+    /// As such, it considers ranges to be satisfiable if they meet the following
+    /// conditions: 
+    ///
+    /// > If a valid byte-range-set includes at least one byte-range-spec with
+    /// a first-byte-pos that is less than the current length of the
+    /// representation, or at least one suffix-byte-range-spec with a
+    /// non-zero suffix-length, then the byte-range-set is satisfiable.
+    /// Otherwise, the byte-range-set is unsatisfiable.
+    ///
+    /// The function also computes remainder ranges based on the RFC:
+    ///
+    /// > If the last-byte-pos value is
+    /// absent, or if the value is greater than or equal to the current
+    /// length of the representation data, the byte range is interpreted as
+    /// the remainder of the representation (i.e., the server replaces the
+    /// value of last-byte-pos with a value that is one less than the current
+    /// length of the selected representation).
+    ///
+    /// [1]: https://tools.ietf.org/html/rfc7233
+    pub fn to_satisfiable_range(&self, full_length: u64) -> Option<(u64, u64)> {
+        // If the full length is zero, there is no satisfiable end-inclusive range.
+        if full_length == 0 {
+            return None;
+        }
+        match self {
+            &ByteRangeSpec::FromTo(from, to) => {
+                if from < full_length && from <= to {
+                    Some((from, ::std::cmp::min(to, full_length - 1)))
+                } else {
+                    None
+                }
+            },
+            &ByteRangeSpec::AllFrom(from) => {
+                if from < full_length {
+                    Some((from, full_length - 1))
+                } else {
+                    None
+                }
+            },
+            &ByteRangeSpec::Last(last) => {
+                if last > 0 {
+                    // From the RFC: If the selected representation is shorter
+                    // than the specified suffix-length,
+                    // the entire representation is used.
+                    if last > full_length {
+                        Some((0, full_length - 1))
+                    } else {
+                        Some((full_length - last, full_length - 1))
+                    }
+                } else {
+                    None
+                }
+            }
+        }
+    }
+}
+
+impl Range {
+    /// Get the most common byte range header ("bytes=from-to")
+    pub fn bytes(from: u64, to: u64) -> Range {
+        Range::Bytes(vec![ByteRangeSpec::FromTo(from, to)])
+    }
+
+    /// Get byte range header with multiple subranges
+    /// ("bytes=from1-to1,from2-to2,fromX-toX")
+    pub fn bytes_multi(ranges: Vec<(u64, u64)>) -> Range {
+        Range::Bytes(ranges.iter().map(|r| ByteRangeSpec::FromTo(r.0, r.1)).collect())
+    }
+}
+
+
+impl fmt::Display for ByteRangeSpec {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            ByteRangeSpec::FromTo(from, to) => write!(f, "{}-{}", from, to),
+            ByteRangeSpec::Last(pos) => write!(f, "-{}", pos),
+            ByteRangeSpec::AllFrom(pos) => write!(f, "{}-", pos),
+        }
+    }
+}
+
+
+impl fmt::Display for Range {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            Range::Bytes(ref ranges) => {
+                try!(write!(f, "bytes="));
+
+                for (i, range) in ranges.iter().enumerate() {
+                    if i != 0 {
+                        try!(f.write_str(","));
+                    }
+                    try!(Display::fmt(range, f));
+                }
+                Ok(())
+            },
+            Range::Unregistered(ref unit, ref range_str) => {
+                write!(f, "{}={}", unit, range_str)
+            },
+        }
+    }
+}
+
+impl FromStr for Range {
+    type Err = ::Error;
+
+    fn from_str(s: &str) -> ::Result<Range> {
+        let mut iter = s.splitn(2, '=');
+
+        match (iter.next(), iter.next()) {
+            (Some("bytes"), Some(ranges)) => {
+                let ranges = from_comma_delimited(ranges);
+                if ranges.is_empty() {
+                    return Err(::Error::Header);
+                }
+                Ok(Range::Bytes(ranges))
+            }
+            (Some(unit), Some(range_str)) if unit != "" && range_str != "" => {
+                Ok(Range::Unregistered(unit.to_owned(), range_str.to_owned()))
+
+            },
+            _ => Err(::Error::Header)
+        }
+    }
+}
+
+impl FromStr for ByteRangeSpec {
+    type Err = ::Error;
+
+    fn from_str(s: &str) -> ::Result<ByteRangeSpec> {
+        let mut parts = s.splitn(2, '-');
+
+        match (parts.next(), parts.next()) {
+            (Some(""), Some(end)) => {
+                end.parse().or(Err(::Error::Header)).map(ByteRangeSpec::Last)
+            },
+            (Some(start), Some("")) => {
+                start.parse().or(Err(::Error::Header)).map(ByteRangeSpec::AllFrom)
+            },
+            (Some(start), Some(end)) => {
+                match (start.parse(), end.parse()) {
+                    (Ok(start), Ok(end)) if start <= end => Ok(ByteRangeSpec::FromTo(start, end)),
+                    _ => Err(::Error::Header)
+                }
+            },
+            _ => Err(::Error::Header)
+        }
+    }
+}
+
+fn from_comma_delimited<T: FromStr>(s: &str) -> Vec<T> {
+    s.split(',')
+        .filter_map(|x| match x.trim() {
+            "" => None,
+            y => Some(y)
+        })
+        .filter_map(|x| x.parse().ok())
+        .collect()
+}
+
+impl Header for Range {
+
+    fn header_name() -> &'static str {
+        static NAME: &'static str = "Range";
+        NAME
+    }
+
+    fn parse_header(raw: &Raw) -> ::Result<Range> {
+        from_one_raw_str(raw)
+    }
+
+    fn fmt_header(&self, f: &mut ::header::Formatter) -> fmt::Result {
+        f.fmt_line(self)
+    }
+
+}
+
+#[test]
+fn test_parse_bytes_range_valid() {
+    let r: Range = Header::parse_header(&"bytes=1-100".into()).unwrap();
+    let r2: Range = Header::parse_header(&"bytes=1-100,-".into()).unwrap();
+    let r3 =  Range::bytes(1, 100);
+    assert_eq!(r, r2);
+    assert_eq!(r2, r3);
+
+    let r: Range = Header::parse_header(&"bytes=1-100,200-".into()).unwrap();
+    let r2: Range = Header::parse_header(&"bytes= 1-100 , 101-xxx,  200- ".into()).unwrap();
+    let r3 =  Range::Bytes(
+        vec![ByteRangeSpec::FromTo(1, 100), ByteRangeSpec::AllFrom(200)]
+    );
+    assert_eq!(r, r2);
+    assert_eq!(r2, r3);
+
+    let r: Range = Header::parse_header(&"bytes=1-100,-100".into()).unwrap();
+    let r2: Range = Header::parse_header(&"bytes=1-100, ,,-100".into()).unwrap();
+    let r3 =  Range::Bytes(
+        vec![ByteRangeSpec::FromTo(1, 100), ByteRangeSpec::Last(100)]
+    );
+    assert_eq!(r, r2);
+    assert_eq!(r2, r3);
+
+    let r: Range = Header::parse_header(&"custom=1-100,-100".into()).unwrap();
+    let r2 =  Range::Unregistered("custom".to_owned(), "1-100,-100".to_owned());
+    assert_eq!(r, r2);
+
+}
+
+#[test]
+fn test_parse_unregistered_range_valid() {
+    let r: Range = Header::parse_header(&"custom=1-100,-100".into()).unwrap();
+    let r2 =  Range::Unregistered("custom".to_owned(), "1-100,-100".to_owned());
+    assert_eq!(r, r2);
+
+    let r: Range = Header::parse_header(&"custom=abcd".into()).unwrap();
+    let r2 =  Range::Unregistered("custom".to_owned(), "abcd".to_owned());
+    assert_eq!(r, r2);
+
+    let r: Range = Header::parse_header(&"custom=xxx-yyy".into()).unwrap();
+    let r2 =  Range::Unregistered("custom".to_owned(), "xxx-yyy".to_owned());
+    assert_eq!(r, r2);
+}
+
+#[test]
+fn test_parse_invalid() {
+    let r: ::Result<Range> = Header::parse_header(&"bytes=1-a,-".into());
+    assert_eq!(r.ok(), None);
+
+    let r: ::Result<Range> = Header::parse_header(&"bytes=1-2-3".into());
+    assert_eq!(r.ok(), None);
+
+    let r: ::Result<Range> = Header::parse_header(&"abc".into());
+    assert_eq!(r.ok(), None);
+
+    let r: ::Result<Range> = Header::parse_header(&"bytes=1-100=".into());
+    assert_eq!(r.ok(), None);
+
+    let r: ::Result<Range> = Header::parse_header(&"bytes=".into());
+    assert_eq!(r.ok(), None);
+
+    let r: ::Result<Range> = Header::parse_header(&"custom=".into());
+    assert_eq!(r.ok(), None);
+
+    let r: ::Result<Range> = Header::parse_header(&"=1-100".into());
+    assert_eq!(r.ok(), None);
+}
+
+#[test]
+fn test_fmt() {
+    use header::Headers;
+
+    let mut headers = Headers::new();
+
+    headers.set(
+        Range::Bytes(
+            vec![ByteRangeSpec::FromTo(0, 1000), ByteRangeSpec::AllFrom(2000)]
+    ));
+    assert_eq!(&headers.to_string(), "Range: bytes=0-1000,2000-\r\n");
+
+    headers.clear();
+    headers.set(Range::Bytes(vec![]));
+
+    assert_eq!(&headers.to_string(), "Range: bytes=\r\n");
+
+    headers.clear();
+    headers.set(Range::Unregistered("custom".to_owned(), "1-xxx".to_owned()));
+
+    assert_eq!(&headers.to_string(), "Range: custom=1-xxx\r\n");
+}
+
+#[test]
+fn test_byte_range_spec_to_satisfiable_range() {
+    assert_eq!(Some((0, 0)), ByteRangeSpec::FromTo(0, 0).to_satisfiable_range(3));
+    assert_eq!(Some((1, 2)), ByteRangeSpec::FromTo(1, 2).to_satisfiable_range(3));
+    assert_eq!(Some((1, 2)), ByteRangeSpec::FromTo(1, 5).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::FromTo(3, 3).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::FromTo(2, 1).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::FromTo(0, 0).to_satisfiable_range(0));
+
+    assert_eq!(Some((0, 2)), ByteRangeSpec::AllFrom(0).to_satisfiable_range(3));
+    assert_eq!(Some((2, 2)), ByteRangeSpec::AllFrom(2).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::AllFrom(3).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::AllFrom(5).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::AllFrom(0).to_satisfiable_range(0));
+
+    assert_eq!(Some((1, 2)), ByteRangeSpec::Last(2).to_satisfiable_range(3));
+    assert_eq!(Some((2, 2)), ByteRangeSpec::Last(1).to_satisfiable_range(3));
+    assert_eq!(Some((0, 2)), ByteRangeSpec::Last(5).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::Last(0).to_satisfiable_range(3));
+    assert_eq!(None, ByteRangeSpec::Last(2).to_satisfiable_range(0));
+}
+

src/header/mod.rs

@@ -0,0 +1,250 @@
+//! Various http headers
+// This is mostly copy of [hyper](https://github.com/hyperium/hyper/tree/master/src/header)
+
+use std::fmt;
+use std::str::FromStr;
+
+use bytes::{Bytes, BytesMut};
+use http::{Error as HttpError};
+use http::header::GetAll;
+use mime::Mime;
+
+pub use cookie::{Cookie, CookieBuilder};
+pub use http_range::HttpRange;
+
+#[doc(hidden)]
+pub mod http {
+    pub use http::header::*;
+}
+
+use error::ParseError;
+use httpmessage::HttpMessage;
+pub use httpresponse::ConnectionType;
+
+mod common;
+mod shared;
+#[doc(hidden)]
+pub use self::common::*;
+#[doc(hidden)]
+pub use self::shared::*;
+
+
+#[doc(hidden)]
+/// A trait for any object that will represent a header field and value.
+pub trait Header where Self: IntoHeaderValue {
+
+    /// Returns the name of the header field
+    fn name() -> http::HeaderName;
+
+    /// Parse a header
+    fn parse<T: HttpMessage>(msg: &T) -> Result<Self, ParseError>;
+}
+
+#[doc(hidden)]
+/// A trait for any object that can be Converted to a `HeaderValue`
+pub trait IntoHeaderValue: Sized {
+    /// The type returned in the event of a conversion error.
+    type Error: Into<HttpError>;
+
+    /// Cast from PyObject to a concrete Python object type.
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error>;
+}
+
+impl IntoHeaderValue for http::HeaderValue {
+    type Error = http::InvalidHeaderValue;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        Ok(self)
+    }
+}
+
+impl<'a> IntoHeaderValue for &'a str {
+    type Error = http::InvalidHeaderValue;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        self.parse()
+    }
+}
+
+impl<'a> IntoHeaderValue for &'a [u8] {
+    type Error = http::InvalidHeaderValue;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        http::HeaderValue::from_bytes(self)
+    }
+}
+
+impl IntoHeaderValue for Bytes {
+    type Error = http::InvalidHeaderValueBytes;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        http::HeaderValue::from_shared(self)
+    }
+}
+
+impl IntoHeaderValue for Vec<u8> {
+    type Error = http::InvalidHeaderValueBytes;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        http::HeaderValue::from_shared(Bytes::from(self))
+    }
+}
+
+impl IntoHeaderValue for String {
+    type Error = http::InvalidHeaderValueBytes;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        http::HeaderValue::from_shared(Bytes::from(self))
+    }
+}
+
+impl IntoHeaderValue for Mime {
+    type Error = http::InvalidHeaderValueBytes;
+
+    #[inline]
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        http::HeaderValue::from_shared(Bytes::from(format!("{}", self)))
+    }
+}
+
+/// Represents supported types of content encodings
+#[derive(Copy, Clone, PartialEq, Debug)]
+pub enum ContentEncoding {
+    /// Automatically select encoding based on encoding negotiation
+    Auto,
+    /// A format using the Brotli algorithm
+    Br,
+    /// A format using the zlib structure with deflate algorithm
+    Deflate,
+    /// Gzip algorithm
+    Gzip,
+    /// Indicates the identity function (i.e. no compression, nor modification)
+    Identity,
+}
+
+impl ContentEncoding {
+
+    #[inline]
+    pub fn is_compression(&self) -> bool {
+        match *self {
+            ContentEncoding::Identity | ContentEncoding::Auto => false,
+            _ => true
+        }
+    }
+
+    #[inline]
+    pub fn as_str(&self) -> &'static str {
+        match *self {
+            ContentEncoding::Br => "br",
+            ContentEncoding::Gzip => "gzip",
+            ContentEncoding::Deflate => "deflate",
+            ContentEncoding::Identity | ContentEncoding::Auto => "identity",
+        }
+    }
+    /// default quality value
+    pub fn quality(&self) -> f64 {
+        match *self {
+            ContentEncoding::Br => 1.1,
+            ContentEncoding::Gzip => 1.0,
+            ContentEncoding::Deflate => 0.9,
+            ContentEncoding::Identity | ContentEncoding::Auto => 0.1,
+        }
+    }
+}
+
+// TODO: remove memory allocation
+impl<'a> From<&'a str> for ContentEncoding {
+    fn from(s: &'a str) -> ContentEncoding {
+        match s.trim().to_lowercase().as_ref() {
+            "br" => ContentEncoding::Br,
+            "gzip" => ContentEncoding::Gzip,
+            "deflate" => ContentEncoding::Deflate,
+            "identity" => ContentEncoding::Identity,
+            _ => ContentEncoding::Auto,
+        }
+    }
+}
+
+#[doc(hidden)]
+pub(crate) struct Writer {
+    buf: BytesMut,
+}
+
+impl Writer {
+    fn new() -> Writer {
+        Writer{buf: BytesMut::new()}
+    }
+    fn take(&mut self) -> Bytes {
+        self.buf.take().freeze()
+    }
+}
+
+impl fmt::Write for Writer {
+    #[inline]
+    fn write_str(&mut self, s: &str) -> fmt::Result {
+        self.buf.extend_from_slice(s.as_bytes());
+        Ok(())
+    }
+
+    #[inline]
+    fn write_fmt(&mut self, args: fmt::Arguments) -> fmt::Result {
+        fmt::write(self, args)
+    }
+}
+
+#[inline]
+#[doc(hidden)]
+/// Reads a comma-delimited raw header into a Vec.
+pub fn from_comma_delimited<T: FromStr>(all: GetAll<http::HeaderValue>)
+                                        -> Result<Vec<T>, ParseError>
+{
+    let mut result = Vec::new();
+    for h in all {
+        let s = h.to_str().map_err(|_| ParseError::Header)?;
+        result.extend(s.split(',')
+                      .filter_map(|x| match x.trim() {
+                          "" => None,
+                          y => Some(y)
+                      })
+                      .filter_map(|x| x.trim().parse().ok()))
+    }
+    Ok(result)
+}
+
+#[inline]
+#[doc(hidden)]
+/// Reads a single string when parsing a header.
+pub fn from_one_raw_str<T: FromStr>(val: Option<&http::HeaderValue>)
+                                    -> Result<T, ParseError>
+{
+    if let Some(line) = val {
+        let line = line.to_str().map_err(|_| ParseError::Header)?;
+        if !line.is_empty() {
+            return T::from_str(line).or(Err(ParseError::Header))
+        }
+    }
+    Err(ParseError::Header)
+}
+
+#[inline]
+#[doc(hidden)]
+/// Format an array into a comma-delimited string.
+pub fn fmt_comma_delimited<T>(f: &mut fmt::Formatter, parts: &[T]) -> fmt::Result
+    where T: fmt::Display
+{
+    let mut iter = parts.iter();
+    if let Some(part) = iter.next() {
+        fmt::Display::fmt(part, f)?;
+    }
+    for part in iter {
+        f.write_str(", ")?;
+        fmt::Display::fmt(part, f)?;
+    }
+    Ok(())
+}

src/header/shared/charset.rs

@@ -0,0 +1,154 @@
+#![allow(unused)]
+use std::fmt::{self, Display};
+use std::str::FromStr;
+use std::ascii::AsciiExt;
+
+use self::Charset::*;
+
+/// A Mime charset.
+///
+/// The string representation is normalised to upper case.
+///
+/// See [http://www.iana.org/assignments/character-sets/character-sets.xhtml][url].
+///
+/// [url]: http://www.iana.org/assignments/character-sets/character-sets.xhtml
+#[derive(Clone,Debug,PartialEq)]
+#[allow(non_camel_case_types)]
+pub enum Charset{
+    /// US ASCII
+    Us_Ascii,
+    /// ISO-8859-1
+    Iso_8859_1,
+    /// ISO-8859-2
+    Iso_8859_2,
+    /// ISO-8859-3
+    Iso_8859_3,
+    /// ISO-8859-4
+    Iso_8859_4,
+    /// ISO-8859-5
+    Iso_8859_5,
+    /// ISO-8859-6
+    Iso_8859_6,
+    /// ISO-8859-7
+    Iso_8859_7,
+    /// ISO-8859-8
+    Iso_8859_8,
+    /// ISO-8859-9
+    Iso_8859_9,
+    /// ISO-8859-10
+    Iso_8859_10,
+    /// Shift_JIS
+    Shift_Jis,
+    /// EUC-JP
+    Euc_Jp,
+    /// ISO-2022-KR
+    Iso_2022_Kr,
+    /// EUC-KR
+    Euc_Kr,
+    /// ISO-2022-JP
+    Iso_2022_Jp,
+    /// ISO-2022-JP-2
+    Iso_2022_Jp_2,
+    /// ISO-8859-6-E
+    Iso_8859_6_E,
+    /// ISO-8859-6-I
+    Iso_8859_6_I,
+    /// ISO-8859-8-E
+    Iso_8859_8_E,
+    /// ISO-8859-8-I
+    Iso_8859_8_I,
+    /// GB2312
+    Gb2312,
+    /// Big5
+    Big5,
+    /// KOI8-R
+    Koi8_R,
+    /// An arbitrary charset specified as a string
+    Ext(String)
+}
+
+impl Charset {
+    fn name(&self) -> &str {
+        match *self {
+            Us_Ascii => "US-ASCII",
+            Iso_8859_1 => "ISO-8859-1",
+            Iso_8859_2 => "ISO-8859-2",
+            Iso_8859_3 => "ISO-8859-3",
+            Iso_8859_4 => "ISO-8859-4",
+            Iso_8859_5 => "ISO-8859-5",
+            Iso_8859_6 => "ISO-8859-6",
+            Iso_8859_7 => "ISO-8859-7",
+            Iso_8859_8 => "ISO-8859-8",
+            Iso_8859_9 => "ISO-8859-9",
+            Iso_8859_10 => "ISO-8859-10",
+            Shift_Jis => "Shift-JIS",
+            Euc_Jp => "EUC-JP",
+            Iso_2022_Kr => "ISO-2022-KR",
+            Euc_Kr => "EUC-KR",
+            Iso_2022_Jp => "ISO-2022-JP",
+            Iso_2022_Jp_2 => "ISO-2022-JP-2",
+            Iso_8859_6_E => "ISO-8859-6-E",
+            Iso_8859_6_I => "ISO-8859-6-I",
+            Iso_8859_8_E => "ISO-8859-8-E",
+            Iso_8859_8_I => "ISO-8859-8-I",
+            Gb2312 => "GB2312",
+            Big5 => "5",
+            Koi8_R => "KOI8-R",
+            Ext(ref s) => s
+        }
+    }
+}
+
+impl Display for Charset {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str(self.name())
+    }
+}
+
+impl FromStr for Charset {
+    type Err = ::Error;
+    fn from_str(s: &str) -> ::Result<Charset> {
+        Ok(match s.to_ascii_uppercase().as_ref() {
+            "US-ASCII" => Us_Ascii,
+            "ISO-8859-1" => Iso_8859_1,
+            "ISO-8859-2" => Iso_8859_2,
+            "ISO-8859-3" => Iso_8859_3,
+            "ISO-8859-4" => Iso_8859_4,
+            "ISO-8859-5" => Iso_8859_5,
+            "ISO-8859-6" => Iso_8859_6,
+            "ISO-8859-7" => Iso_8859_7,
+            "ISO-8859-8" => Iso_8859_8,
+            "ISO-8859-9" => Iso_8859_9,
+            "ISO-8859-10" => Iso_8859_10,
+            "SHIFT-JIS" => Shift_Jis,
+            "EUC-JP" => Euc_Jp,
+            "ISO-2022-KR" => Iso_2022_Kr,
+            "EUC-KR" => Euc_Kr,
+            "ISO-2022-JP" => Iso_2022_Jp,
+            "ISO-2022-JP-2" => Iso_2022_Jp_2,
+            "ISO-8859-6-E" => Iso_8859_6_E,
+            "ISO-8859-6-I" => Iso_8859_6_I,
+            "ISO-8859-8-E" => Iso_8859_8_E,
+            "ISO-8859-8-I" => Iso_8859_8_I,
+            "GB2312" => Gb2312,
+            "5" => Big5,
+            "KOI8-R" => Koi8_R,
+            s => Ext(s.to_owned())
+        })
+    }
+}
+
+#[test]
+fn test_parse() {
+    assert_eq!(Us_Ascii,"us-ascii".parse().unwrap());
+    assert_eq!(Us_Ascii,"US-Ascii".parse().unwrap());
+    assert_eq!(Us_Ascii,"US-ASCII".parse().unwrap());
+    assert_eq!(Shift_Jis,"Shift-JIS".parse().unwrap());
+    assert_eq!(Ext("ABCD".to_owned()),"abcd".parse().unwrap());
+}
+
+#[test]
+fn test_display() {
+    assert_eq!("US-ASCII", format!("{}", Us_Ascii));
+    assert_eq!("ABCD", format!("{}", Ext("ABCD".to_owned())));
+}

src/header/shared/encoding.rs

@@ -0,0 +1,57 @@
+use std::fmt;
+use std::str;
+
+pub use self::Encoding::{Chunked, Brotli, Gzip, Deflate, Compress, Identity, EncodingExt, Trailers};
+
+/// A value to represent an encoding used in `Transfer-Encoding`
+/// or `Accept-Encoding` header.
+#[derive(Clone, PartialEq, Debug)]
+pub enum Encoding {
+    /// The `chunked` encoding.
+    Chunked,
+    /// The `br` encoding.
+    Brotli,
+    /// The `gzip` encoding.
+    Gzip,
+    /// The `deflate` encoding.
+    Deflate,
+    /// The `compress` encoding.
+    Compress,
+    /// The `identity` encoding.
+    Identity,
+    /// The `trailers` encoding.
+    Trailers,
+    /// Some other encoding that is less common, can be any String.
+    EncodingExt(String)
+}
+
+impl fmt::Display for Encoding {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str(match *self {
+            Chunked => "chunked",
+            Brotli => "br",
+            Gzip => "gzip",
+            Deflate => "deflate",
+            Compress => "compress",
+            Identity => "identity",
+            Trailers => "trailers",
+            EncodingExt(ref s) => s.as_ref()
+        })
+    }
+}
+
+impl str::FromStr for Encoding {
+    type Err = ::error::ParseError;
+    fn from_str(s: &str) -> Result<Encoding, ::error::ParseError> {
+        match s {
+            "chunked" => Ok(Chunked),
+            "br" => Ok(Brotli),
+            "deflate" => Ok(Deflate),
+            "gzip" => Ok(Gzip),
+            "compress" => Ok(Compress),
+            "identity" => Ok(Identity),
+            "trailers" => Ok(Trailers),
+            _ => Ok(EncodingExt(s.to_owned()))
+        }
+    }
+}

src/header/shared/entity.rs

@@ -0,0 +1,230 @@
+use std::str::FromStr;
+use std::fmt::{self, Display, Write};
+use header::{http, Writer, IntoHeaderValue};
+
+/// check that each char in the slice is either:
+/// 1. `%x21`, or
+/// 2. in the range `%x23` to `%x7E`, or
+/// 3. above `%x80`
+fn check_slice_validity(slice: &str) -> bool {
+    slice.bytes().all(|c|
+        c == b'\x21' || (c >= b'\x23' && c <= b'\x7e') | (c >= b'\x80'))
+}
+
+/// An entity tag, defined in [RFC7232](https://tools.ietf.org/html/rfc7232#section-2.3)
+///
+/// An entity tag consists of a string enclosed by two literal double quotes.
+/// Preceding the first double quote is an optional weakness indicator,
+/// which always looks like `W/`. Examples for valid tags are `"xyzzy"` and `W/"xyzzy"`.
+///
+/// # ABNF
+///
+/// ```text
+/// entity-tag = [ weak ] opaque-tag
+/// weak       = %x57.2F ; "W/", case-sensitive
+/// opaque-tag = DQUOTE *etagc DQUOTE
+/// etagc      = %x21 / %x23-7E / obs-text
+///            ; VCHAR except double quotes, plus obs-text
+/// ```
+///
+/// # Comparison
+/// To check if two entity tags are equivalent in an application always use the `strong_eq` or
+/// `weak_eq` methods based on the context of the Tag. Only use `==` to check if two tags are
+/// identical.
+///
+/// The example below shows the results for a set of entity-tag pairs and
+/// both the weak and strong comparison function results:
+///
+/// | `ETag 1`| `ETag 2`| Strong Comparison | Weak Comparison |
+/// |---------|---------|-------------------|-----------------|
+/// | `W/"1"` | `W/"1"` | no match          | match           |
+/// | `W/"1"` | `W/"2"` | no match          | no match        |
+/// | `W/"1"` | `"1"`   | no match          | match           |
+/// | `"1"`   | `"1"`   | match             | match           |
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct EntityTag {
+    /// Weakness indicator for the tag
+    pub weak: bool,
+    /// The opaque string in between the DQUOTEs
+    tag: String
+}
+
+impl EntityTag {
+    /// Constructs a new EntityTag.
+    /// # Panics
+    /// If the tag contains invalid characters.
+    pub fn new(weak: bool, tag: String) -> EntityTag {
+        assert!(check_slice_validity(&tag), "Invalid tag: {:?}", tag);
+        EntityTag { weak, tag }
+    }
+
+    /// Constructs a new weak EntityTag.
+    /// # Panics
+    /// If the tag contains invalid characters.
+    pub fn weak(tag: String) -> EntityTag {
+        EntityTag::new(true, tag)
+    }
+
+    /// Constructs a new strong EntityTag.
+    /// # Panics
+    /// If the tag contains invalid characters.
+    pub fn strong(tag: String) -> EntityTag {
+        EntityTag::new(false, tag)
+    }
+
+    /// Get the tag.
+    pub fn tag(&self) -> &str {
+        self.tag.as_ref()
+    }
+
+    /// Set the tag.
+    /// # Panics
+    /// If the tag contains invalid characters.
+    pub fn set_tag(&mut self, tag: String) {
+        assert!(check_slice_validity(&tag), "Invalid tag: {:?}", tag);
+        self.tag = tag
+    }
+
+    /// For strong comparison two entity-tags are equivalent if both are not weak and their
+    /// opaque-tags match character-by-character.
+    pub fn strong_eq(&self, other: &EntityTag) -> bool {
+        !self.weak && !other.weak && self.tag == other.tag
+    }
+
+    /// For weak comparison two entity-tags are equivalent if their
+    /// opaque-tags match character-by-character, regardless of either or
+    /// both being tagged as "weak".
+    pub fn weak_eq(&self, other: &EntityTag) -> bool {
+        self.tag == other.tag
+    }
+
+    /// The inverse of `EntityTag.strong_eq()`.
+    pub fn strong_ne(&self, other: &EntityTag) -> bool {
+        !self.strong_eq(other)
+    }
+
+    /// The inverse of `EntityTag.weak_eq()`.
+    pub fn weak_ne(&self, other: &EntityTag) -> bool {
+        !self.weak_eq(other)
+    }
+}
+
+impl Display for EntityTag {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if self.weak {
+            write!(f, "W/\"{}\"", self.tag)
+        } else {
+            write!(f, "\"{}\"", self.tag)
+        }
+    }
+}
+
+impl FromStr for EntityTag {
+    type Err = ::error::ParseError;
+
+    fn from_str(s: &str) -> Result<EntityTag, ::error::ParseError> {
+        let length: usize = s.len();
+        let slice = &s[..];
+        // Early exits if it doesn't terminate in a DQUOTE.
+        if !slice.ends_with('"') || slice.len() < 2 {
+            return Err(::error::ParseError::Header);
+        }
+        // The etag is weak if its first char is not a DQUOTE.
+        if slice.len() >= 2 && slice.starts_with('"')
+                && check_slice_validity(&slice[1..length-1]) {
+            // No need to check if the last char is a DQUOTE,
+            // we already did that above.
+            return Ok(EntityTag { weak: false, tag: slice[1..length-1].to_owned() });
+        } else if slice.len() >= 4 && slice.starts_with("W/\"")
+                && check_slice_validity(&slice[3..length-1]) {
+            return Ok(EntityTag { weak: true, tag: slice[3..length-1].to_owned() });
+        }
+        Err(::error::ParseError::Header)
+    }
+}
+
+impl IntoHeaderValue for EntityTag {
+    type Error = http::InvalidHeaderValueBytes;
+
+    fn try_into(self) -> Result<http::HeaderValue, Self::Error> {
+        let mut wrt = Writer::new();
+        write!(wrt, "{}", self).unwrap();
+        unsafe{Ok(http::HeaderValue::from_shared_unchecked(wrt.take()))}
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::EntityTag;
+
+    #[test]
+    fn test_etag_parse_success() {
+        // Expected success
+        assert_eq!("\"foobar\"".parse::<EntityTag>().unwrap(),
+            EntityTag::strong("foobar".to_owned()));
+        assert_eq!("\"\"".parse::<EntityTag>().unwrap(),
+            EntityTag::strong("".to_owned()));
+        assert_eq!("W/\"weaktag\"".parse::<EntityTag>().unwrap(),
+            EntityTag::weak("weaktag".to_owned()));
+        assert_eq!("W/\"\x65\x62\"".parse::<EntityTag>().unwrap(),
+            EntityTag::weak("\x65\x62".to_owned()));
+        assert_eq!("W/\"\"".parse::<EntityTag>().unwrap(), EntityTag::weak("".to_owned()));
+    }
+
+    #[test]
+    fn test_etag_parse_failures() {
+        // Expected failures
+        assert!("no-dquotes".parse::<EntityTag>().is_err());
+        assert!("w/\"the-first-w-is-case-sensitive\"".parse::<EntityTag>().is_err());
+        assert!("".parse::<EntityTag>().is_err());
+        assert!("\"unmatched-dquotes1".parse::<EntityTag>().is_err());
+        assert!("unmatched-dquotes2\"".parse::<EntityTag>().is_err());
+        assert!("matched-\"dquotes\"".parse::<EntityTag>().is_err());
+    }
+
+    #[test]
+    fn test_etag_fmt() {
+        assert_eq!(format!("{}", EntityTag::strong("foobar".to_owned())), "\"foobar\"");
+        assert_eq!(format!("{}", EntityTag::strong("".to_owned())), "\"\"");
+        assert_eq!(format!("{}", EntityTag::weak("weak-etag".to_owned())), "W/\"weak-etag\"");
+        assert_eq!(format!("{}", EntityTag::weak("\u{0065}".to_owned())), "W/\"\x65\"");
+        assert_eq!(format!("{}", EntityTag::weak("".to_owned())), "W/\"\"");
+    }
+
+    #[test]
+    fn test_cmp() {
+        // | ETag 1  | ETag 2  | Strong Comparison | Weak Comparison |
+        // |---------|---------|-------------------|-----------------|
+        // | `W/"1"` | `W/"1"` | no match          | match           |
+        // | `W/"1"` | `W/"2"` | no match          | no match        |
+        // | `W/"1"` | `"1"`   | no match          | match           |
+        // | `"1"`   | `"1"`   | match             | match           |
+        let mut etag1 = EntityTag::weak("1".to_owned());
+        let mut etag2 = EntityTag::weak("1".to_owned());
+        assert!(!etag1.strong_eq(&etag2));
+        assert!(etag1.weak_eq(&etag2));
+        assert!(etag1.strong_ne(&etag2));
+        assert!(!etag1.weak_ne(&etag2));
+
+        etag1 = EntityTag::weak("1".to_owned());
+        etag2 = EntityTag::weak("2".to_owned());
+        assert!(!etag1.strong_eq(&etag2));
+        assert!(!etag1.weak_eq(&etag2));
+        assert!(etag1.strong_ne(&etag2));
+        assert!(etag1.weak_ne(&etag2));
+
+        etag1 = EntityTag::weak("1".to_owned());
+        etag2 = EntityTag::strong("1".to_owned());
+        assert!(!etag1.strong_eq(&etag2));
+        assert!(etag1.weak_eq(&etag2));
+        assert!(etag1.strong_ne(&etag2));
+        assert!(!etag1.weak_ne(&etag2));
+
+        etag1 = EntityTag::strong("1".to_owned());
+        etag2 = EntityTag::strong("1".to_owned());
+        assert!(etag1.strong_eq(&etag2));
+        assert!(etag1.weak_eq(&etag2));
+        assert!(!etag1.strong_ne(&etag2));
+        assert!(!etag1.weak_ne(&etag2));
+    }
+}

src/header/shared/httpdate.rs

@@ -0,0 +1,97 @@
+use std::fmt::{self, Display};
+use std::io::Write;
+use std::str::FromStr;
+use std::time::{Duration, SystemTime, UNIX_EPOCH};
+
+use time;
+use bytes::{BytesMut, BufMut};
+use http::header::{HeaderValue, InvalidHeaderValueBytes};
+
+use error::ParseError;
+use header::IntoHeaderValue;
+
+
+/// A timestamp with HTTP formatting and parsing
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct HttpDate(time::Tm);
+
+impl FromStr for HttpDate {
+    type Err = ParseError;
+
+    fn from_str(s: &str) -> Result<HttpDate, ParseError> {
+        match time::strptime(s, "%a, %d %b %Y %T %Z").or_else(|_| {
+            time::strptime(s, "%A, %d-%b-%y %T %Z")
+        }).or_else(|_| {
+            time::strptime(s, "%c")
+        }) {
+            Ok(t) => Ok(HttpDate(t)),
+            Err(_) => Err(ParseError::Header),
+        }
+    }
+}
+
+impl Display for HttpDate {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(&self.0.to_utc().rfc822(), f)
+    }
+}
+
+impl From<time::Tm> for HttpDate {
+    fn from(tm: time::Tm) -> HttpDate {
+        HttpDate(tm)
+    }
+}
+
+impl From<SystemTime> for HttpDate {
+    fn from(sys: SystemTime) -> HttpDate {
+        let tmspec = match sys.duration_since(UNIX_EPOCH) {
+            Ok(dur) => {
+                time::Timespec::new(dur.as_secs() as i64, dur.subsec_nanos() as i32)
+            },
+            Err(err) => {
+                let neg = err.duration();
+                time::Timespec::new(-(neg.as_secs() as i64), -(neg.subsec_nanos() as i32))
+            },
+        };
+        HttpDate(time::at_utc(tmspec))
+    }
+}
+
+impl IntoHeaderValue for HttpDate {
+    type Error = InvalidHeaderValueBytes;
+
+    fn try_into(self) -> Result<HeaderValue, Self::Error> {
+        let mut wrt = BytesMut::with_capacity(29).writer();
+        write!(wrt, "{}", self.0.rfc822()).unwrap();
+        unsafe{Ok(HeaderValue::from_shared_unchecked(wrt.get_mut().take().freeze()))}
+    }
+}
+
+impl From<HttpDate> for SystemTime {
+    fn from(date: HttpDate) -> SystemTime {
+        let spec = date.0.to_timespec();
+        if spec.sec >= 0 {
+            UNIX_EPOCH + Duration::new(spec.sec as u64, spec.nsec as u32)
+        } else {
+            UNIX_EPOCH - Duration::new(spec.sec as u64, spec.nsec as u32)
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use time::Tm;
+    use super::HttpDate;
+
+    const NOV_07: HttpDate = HttpDate(Tm {
+        tm_nsec: 0, tm_sec: 37, tm_min: 48, tm_hour: 8, tm_mday: 7, tm_mon: 10, tm_year: 94,
+        tm_wday: 0, tm_isdst: 0, tm_yday: 0, tm_utcoff: 0});
+
+    #[test]
+    fn test_date() {
+        assert_eq!("Sun, 07 Nov 1994 08:48:37 GMT".parse::<HttpDate>().unwrap(), NOV_07);
+        assert_eq!("Sunday, 07-Nov-94 08:48:37 GMT".parse::<HttpDate>().unwrap(), NOV_07);
+        assert_eq!("Sun Nov  7 08:48:37 1994".parse::<HttpDate>().unwrap(), NOV_07);
+        assert!("this-is-no-date".parse::<HttpDate>().is_err());
+    }
+}

src/header/shared/mod.rs

@@ -0,0 +1,14 @@
+//! Copied for `hyper::header::shared`;
+
+pub use self::charset::Charset;
+pub use self::encoding::Encoding;
+pub use self::entity::EntityTag;
+pub use self::httpdate::HttpDate;
+pub use language_tags::LanguageTag;
+pub use self::quality_item::{Quality, QualityItem, qitem, q};
+
+mod charset;
+mod entity;
+mod encoding;
+mod httpdate;
+mod quality_item;

src/header/shared/quality_item.rs

@@ -0,0 +1,265 @@
+#![allow(unused)]
+use std::ascii::AsciiExt;
+use std::cmp;
+use std::default::Default;
+use std::fmt;
+use std::str;
+
+use self::internal::IntoQuality;
+
+/// Represents a quality used in quality values.
+///
+/// Can be created with the `q` function.
+///
+/// # Implementation notes
+///
+/// The quality value is defined as a number between 0 and 1 with three decimal places. This means
+/// there are 1001 possible values. Since floating point numbers are not exact and the smallest
+/// floating point data type (`f32`) consumes four bytes, hyper uses an `u16` value to store the
+/// quality internally. For performance reasons you may set quality directly to a value between
+/// 0 and 1000 e.g. `Quality(532)` matches the quality `q=0.532`.
+///
+/// [RFC7231 Section 5.3.1](https://tools.ietf.org/html/rfc7231#section-5.3.1)
+/// gives more information on quality values in HTTP header fields.
+#[derive(Copy, Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
+pub struct Quality(u16);
+
+impl Default for Quality {
+    fn default() -> Quality {
+        Quality(1000)
+    }
+}
+
+/// Represents an item with a quality value as defined in
+/// [RFC7231](https://tools.ietf.org/html/rfc7231#section-5.3.1).
+#[derive(Clone, PartialEq, Debug)]
+pub struct QualityItem<T> {
+    /// The actual contents of the field.
+    pub item: T,
+    /// The quality (client or server preference) for the value.
+    pub quality: Quality,
+}
+
+impl<T> QualityItem<T> {
+    /// Creates a new `QualityItem` from an item and a quality.
+    /// The item can be of any type.
+    /// The quality should be a value in the range [0, 1].
+    pub fn new(item: T, quality: Quality) -> QualityItem<T> {
+        QualityItem { item, quality }
+    }
+}
+
+impl<T: PartialEq> cmp::PartialOrd for QualityItem<T> {
+    fn partial_cmp(&self, other: &QualityItem<T>) -> Option<cmp::Ordering> {
+        self.quality.partial_cmp(&other.quality)
+    }
+}
+
+impl<T: fmt::Display> fmt::Display for QualityItem<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        try!(fmt::Display::fmt(&self.item, f));
+        match self.quality.0 {
+            1000 => Ok(()),
+            0 => f.write_str("; q=0"),
+            x => write!(f, "; q=0.{}", format!("{:03}", x).trim_right_matches('0'))
+        }
+    }
+}
+
+impl<T: str::FromStr> str::FromStr for QualityItem<T> {
+    type Err = ::error::ParseError;
+
+    fn from_str(s: &str) -> Result<QualityItem<T>, ::error::ParseError> {
+        if !s.is_ascii() {
+            return Err(::error::ParseError::Header);
+        }
+        // Set defaults used if parsing fails.
+        let mut raw_item = s;
+        let mut quality = 1f32;
+
+        let parts: Vec<&str> = s.rsplitn(2, ';').map(|x| x.trim()).collect();
+        if parts.len() == 2 {
+            if parts[0].len() < 2 {
+                return Err(::error::ParseError::Header);
+            }
+            let start = &parts[0][0..2];
+            if start == "q=" || start == "Q=" {
+                let q_part = &parts[0][2..parts[0].len()];
+                if q_part.len() > 5 {
+                    return Err(::error::ParseError::Header);
+                }
+                match q_part.parse::<f32>() {
+                    Ok(q_value) => {
+                        if 0f32 <= q_value && q_value <= 1f32 {
+                            quality = q_value;
+                            raw_item = parts[1];
+                        } else {
+                            return Err(::error::ParseError::Header);
+                        }
+                    },
+                    Err(_) => return Err(::error::ParseError::Header),
+                }
+            }
+        }
+        match raw_item.parse::<T>() {
+            // we already checked above that the quality is within range
+            Ok(item) => Ok(QualityItem::new(item, from_f32(quality))),
+            Err(_) => Err(::error::ParseError::Header),
+        }
+    }
+}
+
+#[inline]
+fn from_f32(f: f32) -> Quality {
+    // this function is only used internally. A check that `f` is within range
+    // should be done before calling this method. Just in case, this
+    // debug_assert should catch if we were forgetful
+    debug_assert!(f >= 0f32 && f <= 1f32, "q value must be between 0.0 and 1.0");
+    Quality((f * 1000f32) as u16)
+}
+
+/// Convenience function to wrap a value in a `QualityItem`
+/// Sets `q` to the default 1.0
+pub fn qitem<T>(item: T) -> QualityItem<T> {
+    QualityItem::new(item, Default::default())
+}
+
+/// Convenience function to create a `Quality` from a float or integer.
+/// 
+/// Implemented for `u16` and `f32`. Panics if value is out of range.
+pub fn q<T: IntoQuality>(val: T) -> Quality {
+    val.into_quality()
+}
+
+mod internal {
+    use super::Quality;
+
+    // TryFrom is probably better, but it's not stable. For now, we want to
+    // keep the functionality of the `q` function, while allowing it to be
+    // generic over `f32` and `u16`.
+    //
+    // `q` would panic before, so keep that behavior. `TryFrom` can be
+    // introduced later for a non-panicking conversion.
+
+    pub trait IntoQuality: Sealed + Sized {
+        fn into_quality(self) -> Quality;
+    }
+
+    impl IntoQuality for f32 {
+        fn into_quality(self) -> Quality {
+            assert!(self >= 0f32 && self <= 1f32, "float must be between 0.0 and 1.0");
+            super::from_f32(self)
+        }
+    }
+
+    impl IntoQuality for u16 {
+        fn into_quality(self) -> Quality {
+            assert!(self <= 1000, "u16 must be between 0 and 1000");
+            Quality(self)
+        }
+    }
+
+
+    pub trait Sealed {}
+    impl Sealed for u16 {}
+    impl Sealed for f32 {}
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use super::super::encoding::*;
+
+    #[test]
+    fn test_quality_item_fmt_q_1() {
+        let x = qitem(Chunked);
+        assert_eq!(format!("{}", x), "chunked");
+    }
+    #[test]
+    fn test_quality_item_fmt_q_0001() {
+        let x = QualityItem::new(Chunked, Quality(1));
+        assert_eq!(format!("{}", x), "chunked; q=0.001");
+    }
+    #[test]
+    fn test_quality_item_fmt_q_05() {
+        // Custom value
+        let x = QualityItem{
+            item: EncodingExt("identity".to_owned()),
+            quality: Quality(500),
+        };
+        assert_eq!(format!("{}", x), "identity; q=0.5");
+    }
+
+    #[test]
+    fn test_quality_item_fmt_q_0() {
+        // Custom value
+        let x = QualityItem{
+            item: EncodingExt("identity".to_owned()),
+            quality: Quality(0),
+        };
+        assert_eq!(x.to_string(), "identity; q=0");
+    }
+
+    #[test]
+    fn test_quality_item_from_str1() {
+        let x: Result<QualityItem<Encoding>, _> = "chunked".parse();
+        assert_eq!(x.unwrap(), QualityItem{ item: Chunked, quality: Quality(1000), });
+    }
+    #[test]
+    fn test_quality_item_from_str2() {
+        let x: Result<QualityItem<Encoding>, _> = "chunked; q=1".parse();
+        assert_eq!(x.unwrap(), QualityItem{ item: Chunked, quality: Quality(1000), });
+    }
+    #[test]
+    fn test_quality_item_from_str3() {
+        let x: Result<QualityItem<Encoding>, _> = "gzip; q=0.5".parse();
+        assert_eq!(x.unwrap(), QualityItem{ item: Gzip, quality: Quality(500), });
+    }
+    #[test]
+    fn test_quality_item_from_str4() {
+        let x: Result<QualityItem<Encoding>, _> = "gzip; q=0.273".parse();
+        assert_eq!(x.unwrap(), QualityItem{ item: Gzip, quality: Quality(273), });
+    }
+    #[test]
+    fn test_quality_item_from_str5() {
+        let x: Result<QualityItem<Encoding>, _> = "gzip; q=0.2739999".parse();
+        assert!(x.is_err());
+    }
+    #[test]
+    fn test_quality_item_from_str6() {
+        let x: Result<QualityItem<Encoding>, _> = "gzip; q=2".parse();
+        assert!(x.is_err());
+    }
+    #[test]
+    fn test_quality_item_ordering() {
+        let x: QualityItem<Encoding> = "gzip; q=0.5".parse().ok().unwrap();
+        let y: QualityItem<Encoding> = "gzip; q=0.273".parse().ok().unwrap();
+        let comparision_result: bool = x.gt(&y);
+        assert!(comparision_result)
+    }
+
+    #[test]
+    fn test_quality() {
+        assert_eq!(q(0.5), Quality(500));
+    }
+
+    #[test]
+    #[should_panic] // FIXME - 32-bit msvc unwinding broken
+    #[cfg_attr(all(target_arch="x86", target_env="msvc"), ignore)]
+    fn test_quality_invalid() {
+        q(-1.0);
+    }
+
+    #[test]
+    #[should_panic] // FIXME - 32-bit msvc unwinding broken
+    #[cfg_attr(all(target_arch="x86", target_env="msvc"), ignore)]
+    fn test_quality_invalid2() {
+        q(2.0);
+    }
+
+    #[test]
+    fn test_fuzzing_bugs() {
+        assert!("99999;".parse::<QualityItem<String>>().is_err());
+        assert!("\x0d;;;=\u{d6aa}==".parse::<QualityItem<String>>().is_err())
+    }
+}

src/httpmessage.rs

@@ -12,6 +12,7 @@ use encoding::label::encoding_from_whatwg_label;
 use http::{header, HeaderMap};
 
 use json::JsonBody;
+use header::Header;
 use multipart::Multipart;
 use error::{ParseError, ContentTypeError,
             HttpRangeError, PayloadError, UrlencodedError};
@@ -23,6 +24,12 @@ pub trait HttpMessage {
     /// Read the message headers.
     fn headers(&self) -> &HeaderMap;
 
+    #[doc(hidden)]
+    /// Get a header
+    fn get_header<H: Header>(&self) -> Result<H, ParseError> where Self: Sized {
+        H::parse(self)
+    }
+    
     /// Read the request content type. If request does not contain
     /// *Content-Type* header, empty str get returned.
     fn content_type(&self) -> &str {

src/httpresponse.rs

@@ -14,7 +14,7 @@ use serde::Serialize;
 use body::Body;
 use error::Error;
 use handler::Responder;
-use headers::ContentEncoding;
+use header::{Header, IntoHeaderValue, ContentEncoding};
 use httprequest::HttpRequest;
 
 /// Represents various types of connection
@@ -230,6 +230,15 @@ pub struct HttpResponseBuilder {
 }
 
 impl HttpResponseBuilder {
+    /// Set HTTP status code of this response.
+    #[inline]
+    pub fn status(&mut self, status: StatusCode) -> &mut Self {
+        if let Some(parts) = parts(&mut self.response, &self.err) {
+            parts.status = status;
+        }
+        self
+    }
+
     /// Set HTTP version of this response.
     ///
     /// By default response's http version depends on request's version.
@@ -241,6 +250,34 @@ impl HttpResponseBuilder {
         self
     }
 
+    /// Set a header.
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// # use actix_web::*;
+    /// # use actix_web::httpcodes::*;
+    /// #
+    /// use actix_web::header;
+    ///
+    /// fn index(req: HttpRequest) -> Result<HttpResponse> {
+    ///     Ok(HttpOk.build()
+    ///         .set(header::IfModifiedSince("Sun, 07 Nov 1994 08:48:37 GMT".parse()?))
+    ///         .finish()?)
+    /// }
+    /// fn main() {}
+    /// ```
+    #[doc(hidden)]
+    pub fn set<H: Header>(&mut self, hdr: H) -> &mut Self
+    {
+        if let Some(parts) = parts(&mut self.response, &self.err) {
+            match hdr.try_into() {
+                Ok(value) => { parts.headers.append(H::name(), value); }
+                Err(e) => self.err = Some(e.into()),
+            }
+        }
+        self
+    }
+
     /// Set a header.
     ///
     /// ```rust
@@ -261,12 +298,12 @@ impl HttpResponseBuilder {
     /// ```
     pub fn header<K, V>(&mut self, key: K, value: V) -> &mut Self
         where HeaderName: HttpTryFrom<K>,
-              HeaderValue: HttpTryFrom<V>
+              V: IntoHeaderValue,
     {
         if let Some(parts) = parts(&mut self.response, &self.err) {
             match HeaderName::try_from(key) {
                 Ok(key) => {
-                    match HeaderValue::try_from(value) {
+                    match value.try_into() {
                         Ok(value) => { parts.headers.append(key, value); }
                         Err(e) => self.err = Some(e.into()),
                     }
@@ -733,8 +770,9 @@ mod tests {
     use std::str::FromStr;
     use time::Duration;
     use http::{Method, Uri};
+    use http::header::{COOKIE, CONTENT_TYPE, HeaderValue};
     use body::Binary;
-    use {headers, httpcodes};
+    use {header, httpcodes};
 
     #[test]
     fn test_debug() {
@@ -746,8 +784,8 @@ mod tests {
     #[test]
     fn test_response_cookies() {
         let mut headers = HeaderMap::new();
-        headers.insert(header::COOKIE,
+        headers.insert(COOKIE,
-                       header::HeaderValue::from_static("cookie1=value1; cookie2=value2"));
+                       HeaderValue::from_static("cookie1=value1; cookie2=value2"));
 
         let req = HttpRequest::new(
             Method::GET, Uri::from_str("/").unwrap(), Version::HTTP_11, headers, None);
@@ -755,7 +793,7 @@ mod tests {
 
         let resp = httpcodes::HttpOk
             .build()
-            .cookie(headers::Cookie::build("name", "value")
+            .cookie(header::Cookie::build("name", "value")
                     .domain("www.rust-lang.org")
                     .path("/test")
                     .http_only(true)
@@ -803,7 +841,7 @@ mod tests {
     fn test_content_type() {
         let resp = HttpResponse::build(StatusCode::OK)
             .content_type("text/plain").body(Body::Empty).unwrap();
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(), "text/plain")
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(), "text/plain")
     }
 
     #[test]
@@ -820,18 +858,18 @@ mod tests {
     fn test_json() {
         let resp = HttpResponse::build(StatusCode::OK)
             .json(vec!["v1", "v2", "v3"]).unwrap();
-        let ct = resp.headers().get(header::CONTENT_TYPE).unwrap();
+        let ct = resp.headers().get(CONTENT_TYPE).unwrap();
-        assert_eq!(ct, header::HeaderValue::from_static("application/json"));
+        assert_eq!(ct, HeaderValue::from_static("application/json"));
         assert_eq!(*resp.body(), Body::from(Bytes::from_static(b"[\"v1\",\"v2\",\"v3\"]")));
     }
 
     #[test]
     fn test_json_ct() {
         let resp = HttpResponse::build(StatusCode::OK)
-            .header(header::CONTENT_TYPE, "text/json")
+            .header(CONTENT_TYPE, "text/json")
             .json(vec!["v1", "v2", "v3"]).unwrap();
-        let ct = resp.headers().get(header::CONTENT_TYPE).unwrap();
+        let ct = resp.headers().get(CONTENT_TYPE).unwrap();
-        assert_eq!(ct, header::HeaderValue::from_static("text/json"));
+        assert_eq!(ct, HeaderValue::from_static("text/json"));
         assert_eq!(*resp.body(), Body::from(Bytes::from_static(b"[\"v1\",\"v2\",\"v3\"]")));
     }
 
@@ -850,89 +888,89 @@ mod tests {
 
         let resp: HttpResponse = "test".into();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("text/plain; charset=utf-8"));
+                   HeaderValue::from_static("text/plain; charset=utf-8"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from("test"));
 
         let resp: HttpResponse = "test".respond_to(req.clone()).ok().unwrap();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("text/plain; charset=utf-8"));
+                   HeaderValue::from_static("text/plain; charset=utf-8"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from("test"));
 
         let resp: HttpResponse = b"test".as_ref().into();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("application/octet-stream"));
+                   HeaderValue::from_static("application/octet-stream"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(b"test".as_ref()));
 
         let resp: HttpResponse = b"test".as_ref().respond_to(req.clone()).ok().unwrap();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("application/octet-stream"));
+                   HeaderValue::from_static("application/octet-stream"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(b"test".as_ref()));
 
         let resp: HttpResponse = "test".to_owned().into();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("text/plain; charset=utf-8"));
+                   HeaderValue::from_static("text/plain; charset=utf-8"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from("test".to_owned()));
 
         let resp: HttpResponse = "test".to_owned().respond_to(req.clone()).ok().unwrap();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("text/plain; charset=utf-8"));
+                   HeaderValue::from_static("text/plain; charset=utf-8"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from("test".to_owned()));
 
         let resp: HttpResponse = (&"test".to_owned()).into();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("text/plain; charset=utf-8"));
+                   HeaderValue::from_static("text/plain; charset=utf-8"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(&"test".to_owned()));
 
         let resp: HttpResponse = (&"test".to_owned()).respond_to(req.clone()).ok().unwrap();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("text/plain; charset=utf-8"));
+                   HeaderValue::from_static("text/plain; charset=utf-8"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(&"test".to_owned()));
 
         let b = Bytes::from_static(b"test");
         let resp: HttpResponse = b.into();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("application/octet-stream"));
+                   HeaderValue::from_static("application/octet-stream"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(Bytes::from_static(b"test")));
 
         let b = Bytes::from_static(b"test");
         let resp: HttpResponse = b.respond_to(req.clone()).ok().unwrap();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("application/octet-stream"));
+                   HeaderValue::from_static("application/octet-stream"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(Bytes::from_static(b"test")));
 
         let b = BytesMut::from("test");
         let resp: HttpResponse = b.into();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("application/octet-stream"));
+                   HeaderValue::from_static("application/octet-stream"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(BytesMut::from("test")));
 
         let b = BytesMut::from("test");
         let resp: HttpResponse = b.respond_to(req.clone()).ok().unwrap();
         assert_eq!(resp.status(), StatusCode::OK);
-        assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(),
+        assert_eq!(resp.headers().get(CONTENT_TYPE).unwrap(),
-                   header::HeaderValue::from_static("application/octet-stream"));
+                   HeaderValue::from_static("application/octet-stream"));
         assert_eq!(resp.status(), StatusCode::OK);
         assert_eq!(resp.body().binary().unwrap(), &Binary::from(BytesMut::from("test")));
     }

src/lib.rs

@@ -71,6 +71,7 @@ extern crate httparse;
 extern crate http_range;
 extern crate mime;
 extern crate mime_guess;
+extern crate language_tags;
 extern crate rand;
 extern crate url;
 extern crate libc;
@@ -120,6 +121,7 @@ pub mod client;
 pub mod fs;
 pub mod ws;
 pub mod error;
+pub mod header;
 pub mod httpcodes;
 pub mod multipart;
 pub mod middleware;
@@ -152,29 +154,15 @@ pub(crate) const HAS_OPENSSL: bool = false;
 // #[cfg(not(feature="tls"))]
 // pub(crate) const HAS_TLS: bool = false;
 
-
+#[doc(hidden)]
+#[deprecated(since="0.4.4", note="please use `actix::header` module")]
 pub mod headers {
 //! Headers implementation
 
     pub use httpresponse::ConnectionType;
-
     pub use cookie::{Cookie, CookieBuilder};
     pub use http_range::HttpRange;
-
+    pub use header::ContentEncoding;
-    /// Represents supported types of content encodings
-    #[derive(Copy, Clone, PartialEq, Debug)]
-    pub enum ContentEncoding {
-        /// Automatically select encoding based on encoding negotiation
-        Auto,
-        /// A format using the Brotli algorithm
-        Br,
-        /// A format using the zlib structure with deflate algorithm
-        Deflate,
-        /// Gzip algorithm
-        Gzip,
-        /// Indicates the identity function (i.e. no compression, nor modification)
-        Identity,
-    }
 }
 
 pub mod dev {

src/server/encoding.rs

@@ -13,7 +13,7 @@ use flate2::write::{GzEncoder, DeflateDecoder, DeflateEncoder};
 use brotli2::write::{BrotliDecoder, BrotliEncoder};
 use bytes::{Bytes, BytesMut, BufMut};
 
-use headers::ContentEncoding;
+use header::ContentEncoding;
 use body::{Body, Binary};
 use error::PayloadError;
 use httprequest::HttpInnerMessage;
@@ -22,51 +22,6 @@ use payload::{PayloadSender, PayloadWriter, PayloadStatus};
 
 use super::shared::SharedBytes;
 
-
-impl ContentEncoding {
-
-    #[inline]
-    pub fn is_compression(&self) -> bool {
-        match *self {
-            ContentEncoding::Identity | ContentEncoding::Auto => false,
-            _ => true
-        }
-    }
-
-    #[inline]
-    pub fn as_str(&self) -> &'static str {
-        match *self {
-            ContentEncoding::Br => "br",
-            ContentEncoding::Gzip => "gzip",
-            ContentEncoding::Deflate => "deflate",
-            ContentEncoding::Identity | ContentEncoding::Auto => "identity",
-        }
-    }
-    /// default quality value
-    fn quality(&self) -> f64 {
-        match *self {
-            ContentEncoding::Br => 1.1,
-            ContentEncoding::Gzip => 1.0,
-            ContentEncoding::Deflate => 0.9,
-            ContentEncoding::Identity | ContentEncoding::Auto => 0.1,
-        }
-    }
-}
-
-// TODO: remove memory allocation
-impl<'a> From<&'a str> for ContentEncoding {
-    fn from(s: &'a str) -> ContentEncoding {
-        match s.trim().to_lowercase().as_ref() {
-            "br" => ContentEncoding::Br,
-            "gzip" => ContentEncoding::Gzip,
-            "deflate" => ContentEncoding::Deflate,
-            "identity" => ContentEncoding::Identity,
-            _ => ContentEncoding::Auto,
-        }
-    }
-}
-
-
 pub(crate) enum PayloadType {
     Sender(PayloadSender),
     Encoding(Box<EncodedPayload>),
@@ -291,18 +246,14 @@ impl PayloadStream {
                 if let Some(ref mut decoder) = *decoder {
                     decoder.as_mut().get_mut().eof = true;
 
-                    loop {
                     self.dst.reserve(8192);
                     match decoder.read(unsafe{self.dst.bytes_mut()}) {
                         Ok(n) =>  {
-                                if n == 0 {
-                                    return Ok(Some(self.dst.take().freeze()))
-                                } else {
                             unsafe{self.dst.advance_mut(n)};
+                            return Ok(Some(self.dst.take().freeze()))
                         }
-                            }
+                        Err(e) =>
-                            Err(e) => return Err(e),
+                            return Err(e),
-                        }
                     }
                 } else {
                     Ok(None)
@@ -328,8 +279,9 @@ impl PayloadStream {
     pub fn feed_data(&mut self, data: Bytes) -> io::Result<Option<Bytes>> {
         match self.decoder {
             Decoder::Br(ref mut decoder) => {
-                match decoder.write(&data).and_then(|_| decoder.flush()) {
+                match decoder.write_all(&data) {
                     Ok(_) => {
+                        decoder.flush()?;
                         let b = decoder.get_mut().take();
                         if !b.is_empty() {
                             Ok(Some(b))
@@ -351,23 +303,31 @@ impl PayloadStream {
 
                 loop {
                     self.dst.reserve(8192);
-                    match decoder.as_mut().as_mut().unwrap().read(unsafe{self.dst.bytes_mut()}) {
+                    match decoder.as_mut()
+                        .as_mut().unwrap().read(unsafe{self.dst.bytes_mut()})
+                    {
                         Ok(n) =>  {
+                            if n != 0 {
+                                unsafe{self.dst.advance_mut(n)};
+                            }
                             if n == 0 {
                                 return Ok(Some(self.dst.take().freeze()));
-                            } else {
-                                unsafe{self.dst.advance_mut(n)};
                             }
                         }
                         Err(e) => {
+                            if e.kind() == io::ErrorKind::WouldBlock && !self.dst.is_empty()
+                            {
+                                return Ok(Some(self.dst.take().freeze()));
+                            }
                             return Err(e)
                         }
                     }
                 }
             },
             Decoder::Deflate(ref mut decoder) => {
-                match decoder.write(&data).and_then(|_| decoder.flush()) {
+                match decoder.write_all(&data) {
                     Ok(_) => {
+                        decoder.flush()?;
                         let b = decoder.get_mut().take();
                         if !b.is_empty() {
                             Ok(Some(b))
@@ -635,9 +595,8 @@ impl ContentEncoder {
     pub fn write(&mut self, data: Binary) -> Result<(), io::Error> {
         match *self {
             ContentEncoder::Br(ref mut encoder) => {
-                match encoder.write(data.as_ref()) {
+                match encoder.write_all(data.as_ref()) {
-                    Ok(_) =>
+                    Ok(_) => Ok(()),
-                        encoder.flush(),
                     Err(err) => {
                         trace!("Error decoding br encoding: {}", err);
                         Err(err)
@@ -645,9 +604,8 @@ impl ContentEncoder {
                 }
             },
             ContentEncoder::Gzip(ref mut encoder) => {
-                match encoder.write(data.as_ref()) {
+                match encoder.write_all(data.as_ref()) {
-                    Ok(_) =>
+                    Ok(_) => Ok(()),
-                        encoder.flush(),
                     Err(err) => {
                         trace!("Error decoding gzip encoding: {}", err);
                         Err(err)
@@ -655,9 +613,8 @@ impl ContentEncoder {
                 }
             }
             ContentEncoder::Deflate(ref mut encoder) => {
-                match encoder.write(data.as_ref()) {
+                match encoder.write_all(data.as_ref()) {
-                    Ok(_) =>
+                    Ok(_) => Ok(()),
-                        encoder.flush(),
                     Err(err) => {
                         trace!("Error decoding deflate encoding: {}", err);
                         Err(err)

src/server/srv.rs

@@ -281,7 +281,7 @@ impl<H: IntoHttpHandler> HttpServer<H>
 
             // start acceptors threads
             for (addr, sock) in addrs {
-                info!("Starting http server on {}", addr);
+                info!("Starting server on http://{}", addr);
                 self.accept.push(
                     start_accept_thread(sock, addr, self.backlog, workers.clone()));
             }
@@ -343,7 +343,7 @@ impl<H: IntoHttpHandler> HttpServer<H>
 
             // start acceptors threads
             for (addr, sock) in addrs {
-                info!("Starting tls http server on {}", addr);
+                info!("Starting server on https://{}", addr);
                 self.accept.push(
                     start_accept_thread(sock, addr, self.backlog, workers.clone()));
             }
@@ -387,7 +387,7 @@ impl<H: IntoHttpHandler> HttpServer<H>
 
             // start acceptors threads
             for (addr, sock) in addrs {
-                info!("Starting tls http server on {}", addr);
+                info!("Starting server on https://{}", addr);
                 self.accept.push(
                     start_accept_thread(sock, addr, self.backlog, workers.clone()));
             }
@@ -420,7 +420,7 @@ impl<H: IntoHttpHandler> HttpServer<H>
 
             // start acceptors threads
             for (addr, sock) in addrs {
-                info!("Starting http server on {}", addr);
+                info!("Starting server on http://{}", addr);
                 self.accept.push(
                     start_accept_thread(sock, addr, self.backlog, workers.clone()));
             }

src/test.rs

@@ -8,7 +8,7 @@ use std::str::FromStr;
 use actix::{Arbiter, Addr, Syn, System, SystemRunner, msgs};
 use cookie::Cookie;
 use http::{Uri, Method, Version, HeaderMap, HttpTryFrom};
-use http::header::{HeaderName, HeaderValue};
+use http::header::HeaderName;
 use futures::Future;
 use tokio_core::net::TcpListener;
 use tokio_core::reactor::Core;
@@ -17,6 +17,7 @@ use net2::TcpBuilder;
 use ws;
 use body::Binary;
 use error::Error;
+use header::{Header, IntoHeaderValue};
 use handler::{Handler, Responder, ReplyItem};
 use middleware::Middleware;
 use application::{Application, HttpApplication};
@@ -332,10 +333,15 @@ impl TestRequest<()> {
         TestRequest::default().uri(path)
     }
 
+    /// Create TestRequest and set header
+    pub fn with_hdr<H: Header>(hdr: H) -> TestRequest<()>
+    {
+        TestRequest::default().set(hdr)
+    }
+
     /// Create TestRequest and set header
     pub fn with_header<K, V>(key: K, value: V) -> TestRequest<()>
-        where HeaderName: HttpTryFrom<K>,
+        where HeaderName: HttpTryFrom<K>, V: IntoHeaderValue,
-              HeaderValue: HttpTryFrom<V>
     {
         TestRequest::default().header(key, value)
     }
@@ -375,13 +381,22 @@ impl<S> TestRequest<S> {
         self
     }
 
+    /// Set a header
+    pub fn set<H: Header>(mut self, hdr: H) -> Self
+    {
+        if let Ok(value) = hdr.try_into() {
+            self.headers.append(H::name(), value);
+            return self
+        }
+        panic!("Can not set header");
+    }
+
     /// Set a header
     pub fn header<K, V>(mut self, key: K, value: V) -> Self
-        where HeaderName: HttpTryFrom<K>,
+        where HeaderName: HttpTryFrom<K>, V: IntoHeaderValue
-              HeaderValue: HttpTryFrom<V>
     {
         if let Ok(key) = HeaderName::try_from(key) {
-            if let Ok(value) = HeaderValue::try_from(value) {
+            if let Ok(value) = value.try_into() {
                 self.headers.append(key, value);
                 return self
             }

tests/test_client.rs

@@ -3,6 +3,7 @@ extern crate actix_web;
 extern crate bytes;
 extern crate futures;
 extern crate flate2;
+extern crate rand;
 
 use std::io::Read;
 
@@ -10,6 +11,7 @@ use bytes::Bytes;
 use futures::Future;
 use futures::stream::once;
 use flate2::read::GzDecoder;
+use rand::Rng;
 
 use actix_web::*;
 
@@ -143,7 +145,12 @@ fn test_client_gzip_encoding_large() {
 }
 
 #[test]
-fn test_client_brotli_encoding() {
+fn test_client_gzip_encoding_large_random() {
+    let data = rand::thread_rng()
+        .gen_ascii_chars()
+        .take(100_000)
+        .collect::<String>();
+
     let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
         req.body()
             .and_then(|bytes: Bytes| {
@@ -154,6 +161,30 @@ fn test_client_brotli_encoding() {
             }).responder()}
     ));
 
+    // client request
+    let request = srv.post()
+        .content_encoding(headers::ContentEncoding::Gzip)
+        .body(data.clone()).unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = srv.execute(response.body()).unwrap();
+    assert_eq!(bytes, Bytes::from(data));
+}
+
+#[test]
+fn test_client_brotli_encoding() {
+    let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
+        req.body()
+            .and_then(|bytes: Bytes| {
+                Ok(httpcodes::HTTPOk
+                   .build()
+                   .content_encoding(headers::ContentEncoding::Gzip)
+                   .body(bytes))
+            }).responder()}
+    ));
+
     // client request
     let request = srv.client(Method::POST, "/")
         .content_encoding(headers::ContentEncoding::Br)
@@ -166,6 +197,36 @@ fn test_client_brotli_encoding() {
     assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
 }
 
+#[test]
+fn test_client_brotli_encoding_large_random() {
+    let data = rand::thread_rng()
+        .gen_ascii_chars()
+        .take(70_000)
+        .collect::<String>();
+
+    let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
+        req.body()
+            .and_then(move |bytes: Bytes| {
+                Ok(httpcodes::HTTPOk
+                   .build()
+                   .content_encoding(headers::ContentEncoding::Gzip)
+                   .body(bytes))
+            }).responder()}
+        ));
+
+    // client request
+    let request = srv.client(Method::POST, "/")
+        .content_encoding(headers::ContentEncoding::Br)
+        .body(data.clone()).unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = srv.execute(response.body()).unwrap();
+    assert_eq!(bytes.len(), data.len());
+    assert_eq!(bytes, Bytes::from(data));
+}
+
 #[test]
 fn test_client_deflate_encoding() {
     let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
@@ -190,6 +251,35 @@ fn test_client_deflate_encoding() {
     assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
 }
 
+#[test]
+fn test_client_deflate_encoding_large_random() {
+    let data = rand::thread_rng()
+        .gen_ascii_chars()
+        .take(70_000)
+        .collect::<String>();
+
+    let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
+        req.body()
+            .and_then(|bytes: Bytes| {
+                Ok(httpcodes::HTTPOk
+                   .build()
+                   .content_encoding(headers::ContentEncoding::Br)
+                   .body(bytes))
+            }).responder()}
+    ));
+
+    // client request
+    let request = srv.post()
+        .content_encoding(headers::ContentEncoding::Deflate)
+        .body(data.clone()).unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = srv.execute(response.body()).unwrap();
+    assert_eq!(bytes, Bytes::from(data));
+}
+
 #[test]
 fn test_client_streaming_explicit() {
     let mut srv = test::TestServer::new(

tests/test_server.rs

@@ -7,6 +7,7 @@ extern crate http;
 extern crate bytes;
 extern crate flate2;
 extern crate brotli2;
+extern crate rand;
 
 use std::{net, thread, time};
 use std::io::{Read, Write};
@@ -23,6 +24,7 @@ use bytes::{Bytes, BytesMut};
 use http::{header, Request};
 use tokio_core::net::TcpStream;
 use tokio_core::reactor::Core;
+use rand::Rng;
 
 use actix::System;
 use actix_web::*;
@@ -235,6 +237,37 @@ fn test_body_gzip_large() {
     assert_eq!(Bytes::from(dec), Bytes::from(data));
 }
 
+#[test]
+fn test_body_gzip_large_random() {
+    let data = rand::thread_rng()
+        .gen_ascii_chars()
+        .take(70_000)
+        .collect::<String>();
+    let srv_data = Arc::new(data.clone());
+
+    let mut srv = test::TestServer::new(
+        move |app| {
+            let data = srv_data.clone();
+            app.handler(
+                move |_| httpcodes::HTTPOk.build()
+                    .content_encoding(headers::ContentEncoding::Gzip)
+                    .body(data.as_ref()))});
+
+    let request = srv.get().disable_decompress().finish().unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = srv.execute(response.body()).unwrap();
+
+    // decode
+    let mut e = GzDecoder::new(&bytes[..]);
+    let mut dec = Vec::new();
+    e.read_to_end(&mut dec).unwrap();
+    assert_eq!(dec.len(), data.len());
+    assert_eq!(Bytes::from(dec), Bytes::from(data));
+}
+
 #[test]
 fn test_body_chunked_implicit() {
     let mut srv = test::TestServer::new(
@@ -492,7 +525,41 @@ fn test_gzip_encoding_large() {
 }
 
 #[test]
-fn test_deflate_encoding() {
+fn test_reading_gzip_encoding_large_random() {
+    let data = rand::thread_rng()
+        .gen_ascii_chars()
+        .take(60_000)
+        .collect::<String>();
+
+    let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
+        req.body()
+            .and_then(|bytes: Bytes| {
+                Ok(httpcodes::HTTPOk
+                   .build()
+                   .content_encoding(headers::ContentEncoding::Identity)
+                   .body(bytes))
+            }).responder()}
+    ));
+
+    // client request
+    let mut e = GzEncoder::new(Vec::new(), Compression::default());
+    e.write_all(data.as_ref()).unwrap();
+    let enc = e.finish().unwrap();
+
+    let request = srv.post()
+        .header(header::CONTENT_ENCODING, "gzip")
+        .body(enc.clone()).unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = srv.execute(response.body()).unwrap();
+    assert_eq!(bytes.len(), data.len());
+    assert_eq!(bytes, Bytes::from(data));
+}
+
+#[test]
+fn test_reading_deflate_encoding() {
     let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
         req.body()
             .and_then(|bytes: Bytes| {
@@ -520,7 +587,7 @@ fn test_deflate_encoding() {
 }
 
 #[test]
-fn test_deflate_encoding_large() {
+fn test_reading_deflate_encoding_large() {
     let data = STR.repeat(10);
     let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
         req.body()
@@ -548,6 +615,40 @@ fn test_deflate_encoding_large() {
     assert_eq!(bytes, Bytes::from(data));
 }
 
+#[test]
+fn test_reading_deflate_encoding_large_random() {
+    let data = rand::thread_rng()
+        .gen_ascii_chars()
+        .take(160_000)
+        .collect::<String>();
+
+    let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {
+        req.body()
+            .and_then(|bytes: Bytes| {
+                Ok(httpcodes::HTTPOk
+                   .build()
+                   .content_encoding(headers::ContentEncoding::Identity)
+                   .body(bytes))
+            }).responder()}
+    ));
+
+    let mut e = DeflateEncoder::new(Vec::new(), Compression::default());
+    e.write_all(data.as_ref()).unwrap();
+    let enc = e.finish().unwrap();
+
+    // client request
+    let request = srv.post()
+        .header(header::CONTENT_ENCODING, "deflate")
+        .body(enc).unwrap();
+    let response = srv.execute(request.send()).unwrap();
+    assert!(response.status().is_success());
+
+    // read response
+    let bytes = srv.execute(response.body()).unwrap();
+    assert_eq!(bytes.len(), data.len());
+    assert_eq!(bytes, Bytes::from(data));
+}
+
 #[test]
 fn test_brotli_encoding() {
     let mut srv = test::TestServer::new(|app| app.handler(|req: HttpRequest| {