mirror of
https://github.com/actix/actix-web.git
synced 2024-06-02 21:39:26 +00:00
812 lines
25 KiB
Rust
812 lines
25 KiB
Rust
//! Static files support
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use std::fmt::Write;
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use std::fs::{DirEntry, File, Metadata};
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use std::io::{Read, Seek};
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use std::ops::{Deref, DerefMut};
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use std::path::{Path, PathBuf};
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use std::sync::Mutex;
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use std::time::{SystemTime, UNIX_EPOCH};
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use std::{cmp, env, io};
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#[cfg(unix)]
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use std::os::unix::fs::MetadataExt;
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use bytes::{BufMut, Bytes, BytesMut};
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use futures::{Async, Future, Poll, Stream};
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use futures_cpupool::{CpuFuture, CpuPool};
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use mime_guess::get_mime_type;
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use error::Error;
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use handler::{Handler, Reply, Responder, RouteHandler, WrapHandler};
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use header;
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use http::{Method, StatusCode};
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use httpmessage::HttpMessage;
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use httprequest::HttpRequest;
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use httpresponse::HttpResponse;
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use param::FromParam;
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/// Env variable for default cpu pool size for `StaticFiles`
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const ENV_CPU_POOL_VAR: &str = "ACTIX_FS_POOL";
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/// A file with an associated name; responds with the Content-Type based on the
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/// file extension.
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#[derive(Debug)]
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pub struct NamedFile {
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path: PathBuf,
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file: File,
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md: Metadata,
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modified: Option<SystemTime>,
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cpu_pool: Option<CpuPool>,
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only_get: bool,
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status_code: StatusCode,
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}
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impl NamedFile {
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/// Attempts to open a file in read-only mode.
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///
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/// # Examples
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///
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/// ```rust
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/// use actix_web::fs::NamedFile;
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///
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/// let file = NamedFile::open("foo.txt");
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/// ```
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pub fn open<P: AsRef<Path>>(path: P) -> io::Result<NamedFile> {
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let file = File::open(path.as_ref())?;
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let md = file.metadata()?;
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let path = path.as_ref().to_path_buf();
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let modified = md.modified().ok();
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let cpu_pool = None;
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Ok(NamedFile {
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path,
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file,
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md,
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modified,
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cpu_pool,
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only_get: false,
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status_code: StatusCode::OK,
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})
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}
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/// Allow only GET and HEAD methods
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#[inline]
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pub fn only_get(mut self) -> Self {
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self.only_get = true;
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self
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}
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/// Returns reference to the underlying `File` object.
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#[inline]
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pub fn file(&self) -> &File {
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&self.file
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}
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/// Retrieve the path of this file.
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///
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/// # Examples
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///
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/// ```rust
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/// # use std::io;
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/// use actix_web::fs::NamedFile;
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///
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/// # fn path() -> io::Result<()> {
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/// let file = NamedFile::open("test.txt")?;
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/// assert_eq!(file.path().as_os_str(), "foo.txt");
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/// # Ok(())
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/// # }
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/// ```
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#[inline]
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pub fn path(&self) -> &Path {
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self.path.as_path()
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}
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/// Set `CpuPool` to use
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#[inline]
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pub fn set_cpu_pool(mut self, cpu_pool: CpuPool) -> Self {
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self.cpu_pool = Some(cpu_pool);
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self
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}
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/// Set response **Status Code**
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pub fn set_status_code(mut self, status: StatusCode) -> Self {
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self.status_code = status;
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self
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}
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fn etag(&self) -> Option<header::EntityTag> {
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// This etag format is similar to Apache's.
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self.modified.as_ref().map(|mtime| {
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let ino = {
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#[cfg(unix)]
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{
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self.md.ino()
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}
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#[cfg(not(unix))]
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{
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0
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}
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};
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let dur = mtime
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.duration_since(UNIX_EPOCH)
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.expect("modification time must be after epoch");
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header::EntityTag::strong(format!(
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"{:x}:{:x}:{:x}:{:x}",
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ino,
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self.md.len(),
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dur.as_secs(),
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dur.subsec_nanos()
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))
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})
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}
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fn last_modified(&self) -> Option<header::HttpDate> {
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self.modified.map(|mtime| mtime.into())
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}
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}
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impl Deref for NamedFile {
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type Target = File;
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fn deref(&self) -> &File {
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&self.file
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}
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}
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impl DerefMut for NamedFile {
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fn deref_mut(&mut self) -> &mut File {
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&mut self.file
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}
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}
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/// Returns true if `req` has no `If-Match` header or one which matches `etag`.
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fn any_match(etag: Option<&header::EntityTag>, req: &HttpRequest) -> bool {
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match req.get_header::<header::IfMatch>() {
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None | Some(header::IfMatch::Any) => true,
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Some(header::IfMatch::Items(ref items)) => {
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if let Some(some_etag) = etag {
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for item in items {
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if item.strong_eq(some_etag) {
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return true;
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}
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}
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}
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false
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}
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}
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}
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/// Returns true if `req` doesn't have an `If-None-Match` header matching `req`.
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fn none_match(etag: Option<&header::EntityTag>, req: &HttpRequest) -> bool {
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match req.get_header::<header::IfNoneMatch>() {
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Some(header::IfNoneMatch::Any) => false,
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Some(header::IfNoneMatch::Items(ref items)) => {
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if let Some(some_etag) = etag {
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for item in items {
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if item.weak_eq(some_etag) {
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return false;
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}
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}
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}
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true
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}
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None => true,
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}
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}
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impl Responder for NamedFile {
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type Item = HttpResponse;
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type Error = io::Error;
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fn respond_to(self, req: HttpRequest) -> Result<HttpResponse, io::Error> {
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if self.status_code != StatusCode::OK {
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let mut resp = HttpResponse::build(self.status_code);
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resp.if_some(self.path().extension(), |ext, resp| {
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resp.set(header::ContentType(get_mime_type(
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&ext.to_string_lossy(),
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)));
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});
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let reader = ChunkedReadFile {
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size: self.md.len(),
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offset: 0,
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cpu_pool: self.cpu_pool
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.unwrap_or_else(|| req.cpu_pool().clone()),
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file: Some(self.file),
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fut: None,
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};
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return Ok(resp.streaming(reader));
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}
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if self.only_get && *req.method() != Method::GET && *req.method() != Method::HEAD
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{
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return Ok(HttpResponse::MethodNotAllowed()
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.header(header::CONTENT_TYPE, "text/plain")
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.header(header::ALLOW, "GET, HEAD")
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.body("This resource only supports GET and HEAD."));
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}
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let etag = self.etag();
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let last_modified = self.last_modified();
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// check preconditions
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let precondition_failed = if !any_match(etag.as_ref(), &req) {
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true
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} else if let (Some(ref m), Some(header::IfUnmodifiedSince(ref since))) =
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(last_modified, req.get_header())
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{
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m > since
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} else {
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false
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};
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// check last modified
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let not_modified = if !none_match(etag.as_ref(), &req) {
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true
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} else if let (Some(ref m), Some(header::IfModifiedSince(ref since))) =
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(last_modified, req.get_header())
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{
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m <= since
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} else {
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false
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};
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let mut resp = HttpResponse::build(self.status_code);
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resp.if_some(self.path().extension(), |ext, resp| {
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resp.set(header::ContentType(get_mime_type(
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&ext.to_string_lossy(),
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)));
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}).if_some(last_modified, |lm, resp| {
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resp.set(header::LastModified(lm));
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})
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.if_some(etag, |etag, resp| {
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resp.set(header::ETag(etag));
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});
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if precondition_failed {
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return Ok(resp.status(StatusCode::PRECONDITION_FAILED).finish());
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} else if not_modified {
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return Ok(resp.status(StatusCode::NOT_MODIFIED).finish());
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}
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if *req.method() == Method::HEAD {
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Ok(resp.finish())
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} else {
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let reader = ChunkedReadFile {
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size: self.md.len(),
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offset: 0,
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cpu_pool: self.cpu_pool
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.unwrap_or_else(|| req.cpu_pool().clone()),
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file: Some(self.file),
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fut: None,
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};
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Ok(resp.streaming(reader))
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}
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}
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}
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/// A helper created from a `std::fs::File` which reads the file
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/// chunk-by-chunk on a `CpuPool`.
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pub struct ChunkedReadFile {
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size: u64,
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offset: u64,
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cpu_pool: CpuPool,
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file: Option<File>,
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fut: Option<CpuFuture<(File, Bytes), io::Error>>,
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}
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impl Stream for ChunkedReadFile {
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type Item = Bytes;
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type Error = Error;
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fn poll(&mut self) -> Poll<Option<Bytes>, Error> {
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if self.fut.is_some() {
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return match self.fut.as_mut().unwrap().poll()? {
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Async::Ready((file, bytes)) => {
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self.fut.take();
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self.file = Some(file);
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self.offset += bytes.len() as u64;
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Ok(Async::Ready(Some(bytes)))
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}
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Async::NotReady => Ok(Async::NotReady),
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};
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}
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let size = self.size;
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let offset = self.offset;
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if size == offset {
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Ok(Async::Ready(None))
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} else {
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let mut file = self.file.take().expect("Use after completion");
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self.fut = Some(self.cpu_pool.spawn_fn(move || {
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let max_bytes = cmp::min(size.saturating_sub(offset), 65_536) as usize;
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let mut buf = BytesMut::with_capacity(max_bytes);
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file.seek(io::SeekFrom::Start(offset))?;
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let nbytes = file.read(unsafe { buf.bytes_mut() })?;
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if nbytes == 0 {
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return Err(io::ErrorKind::UnexpectedEof.into());
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}
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unsafe { buf.advance_mut(nbytes) };
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Ok((file, buf.freeze()))
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}));
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self.poll()
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}
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}
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}
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/// A directory; responds with the generated directory listing.
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#[derive(Debug)]
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pub struct Directory {
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base: PathBuf,
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path: PathBuf,
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}
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impl Directory {
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pub fn new(base: PathBuf, path: PathBuf) -> Directory {
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Directory { base, path }
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}
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fn can_list(&self, entry: &io::Result<DirEntry>) -> bool {
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if let Ok(ref entry) = *entry {
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if let Some(name) = entry.file_name().to_str() {
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if name.starts_with('.') {
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return false;
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}
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}
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if let Ok(ref md) = entry.metadata() {
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let ft = md.file_type();
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return ft.is_dir() || ft.is_file() || ft.is_symlink();
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}
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}
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false
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}
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}
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impl Responder for Directory {
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type Item = HttpResponse;
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type Error = io::Error;
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fn respond_to(self, req: HttpRequest) -> Result<HttpResponse, io::Error> {
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let index_of = format!("Index of {}", req.path());
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let mut body = String::new();
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let base = Path::new(req.path());
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for entry in self.path.read_dir()? {
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if self.can_list(&entry) {
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let entry = entry.unwrap();
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let p = match entry.path().strip_prefix(&self.path) {
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Ok(p) => base.join(p),
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Err(_) => continue,
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};
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// show file url as relative to static path
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let file_url = format!("{}", p.to_string_lossy());
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// if file is a directory, add '/' to the end of the name
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if let Ok(metadata) = entry.metadata() {
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if metadata.is_dir() {
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let _ = write!(
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body,
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"<li><a href=\"{}\">{}/</a></li>",
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file_url,
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entry.file_name().to_string_lossy()
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);
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} else {
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let _ = write!(
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body,
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"<li><a href=\"{}\">{}</a></li>",
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file_url,
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entry.file_name().to_string_lossy()
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);
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}
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} else {
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continue;
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}
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}
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}
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let html = format!(
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"<html>\
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<head><title>{}</title></head>\
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<body><h1>{}</h1>\
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<ul>\
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{}\
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</ul></body>\n</html>",
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index_of, index_of, body
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);
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Ok(HttpResponse::Ok()
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.content_type("text/html; charset=utf-8")
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.body(html))
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}
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}
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/// Static files handling
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///
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/// `StaticFile` handler must be registered with `App::handler()` method,
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/// because `StaticFile` handler requires access sub-path information.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// use actix_web::{fs, App};
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///
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/// fn main() {
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/// let app = App::new()
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/// .handler("/static", fs::StaticFiles::new("."))
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/// .finish();
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/// }
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/// ```
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pub struct StaticFiles<S> {
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directory: PathBuf,
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accessible: bool,
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index: Option<String>,
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show_index: bool,
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cpu_pool: CpuPool,
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default: Box<RouteHandler<S>>,
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_chunk_size: usize,
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_follow_symlinks: bool,
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}
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lazy_static! {
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static ref DEFAULT_CPUPOOL: Mutex<CpuPool> = {
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let default = match env::var(ENV_CPU_POOL_VAR) {
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Ok(val) => {
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if let Ok(val) = val.parse() {
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val
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} else {
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error!("Can not parse ACTIX_FS_POOL value");
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20
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}
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}
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Err(_) => 20,
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};
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Mutex::new(CpuPool::new(default))
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};
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}
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impl<S: 'static> StaticFiles<S> {
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/// Create new `StaticFiles` instance for specified base directory.
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///
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/// `StaticFile` uses `CpuPool` for blocking filesystem operations.
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/// By default pool with 20 threads is used.
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/// Pool size can be changed by setting ACTIX_FS_POOL environment variable.
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pub fn new<T: Into<PathBuf>>(dir: T) -> StaticFiles<S> {
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// use default CpuPool
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let pool = { DEFAULT_CPUPOOL.lock().unwrap().clone() };
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StaticFiles::with_pool(dir, pool)
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}
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/// Create new `StaticFiles` instance for specified base directory and
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/// `CpuPool`.
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pub fn with_pool<T: Into<PathBuf>>(dir: T, pool: CpuPool) -> StaticFiles<S> {
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let dir = dir.into();
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let (dir, access) = match dir.canonicalize() {
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Ok(dir) => {
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if dir.is_dir() {
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(dir, true)
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} else {
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warn!("Is not directory `{:?}`", dir);
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(dir, false)
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}
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}
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Err(err) => {
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warn!("Static files directory `{:?}` error: {}", dir, err);
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(dir, false)
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}
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};
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StaticFiles {
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directory: dir,
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accessible: access,
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index: None,
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show_index: false,
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cpu_pool: pool,
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default: Box::new(WrapHandler::new(|_| {
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HttpResponse::new(StatusCode::NOT_FOUND)
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})),
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_chunk_size: 0,
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_follow_symlinks: false,
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}
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}
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/// Show files listing for directories.
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///
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/// By default show files listing is disabled.
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pub fn show_files_listing(mut self) -> Self {
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self.show_index = true;
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self
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}
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/// Set index file
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///
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/// Redirects to specific index file for directory "/" instead of
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/// showing files listing.
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pub fn index_file<T: Into<String>>(mut self, index: T) -> StaticFiles<S> {
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self.index = Some(index.into());
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self
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}
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/// Sets default handler which is used when no matched file could be found.
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pub fn default_handler<H: Handler<S>>(mut self, handler: H) -> StaticFiles<S> {
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self.default = Box::new(WrapHandler::new(handler));
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self
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}
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}
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impl<S: 'static> Handler<S> for StaticFiles<S> {
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type Result = Result<Reply, Error>;
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fn handle(&mut self, req: HttpRequest<S>) -> Self::Result {
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if !self.accessible {
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Ok(self.default.handle(req))
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} else {
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let relpath = match req.match_info()
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.get("tail")
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.map(|tail| PathBuf::from_param(tail))
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{
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Some(Ok(path)) => path,
|
|
_ => return Ok(self.default.handle(req)),
|
|
};
|
|
|
|
// full filepath
|
|
let path = self.directory.join(&relpath).canonicalize()?;
|
|
|
|
if path.is_dir() {
|
|
if let Some(ref redir_index) = self.index {
|
|
// TODO: Don't redirect, just return the index content.
|
|
// TODO: It'd be nice if there were a good usable URL manipulation
|
|
// library
|
|
let mut new_path: String = req.path().to_owned();
|
|
for el in relpath.iter() {
|
|
new_path.push_str(&el.to_string_lossy());
|
|
new_path.push('/');
|
|
}
|
|
if !new_path.ends_with('/') {
|
|
new_path.push('/');
|
|
}
|
|
new_path.push_str(redir_index);
|
|
HttpResponse::Found()
|
|
.header(header::LOCATION, new_path.as_str())
|
|
.finish()
|
|
.respond_to(req.drop_state())
|
|
} else if self.show_index {
|
|
Directory::new(self.directory.clone(), path)
|
|
.respond_to(req.drop_state())?
|
|
.respond_to(req.drop_state())
|
|
} else {
|
|
Ok(self.default.handle(req))
|
|
}
|
|
} else {
|
|
NamedFile::open(path)?
|
|
.set_cpu_pool(self.cpu_pool.clone())
|
|
.respond_to(req.drop_state())?
|
|
.respond_to(req.drop_state())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use application::App;
|
|
use http::{header, Method, StatusCode};
|
|
use test::{self, TestRequest};
|
|
|
|
#[test]
|
|
fn test_named_file() {
|
|
assert!(NamedFile::open("test--").is_err());
|
|
let mut file = NamedFile::open("Cargo.toml")
|
|
.unwrap()
|
|
.set_cpu_pool(CpuPool::new(1));
|
|
{
|
|
file.file();
|
|
let _f: &File = &file;
|
|
}
|
|
{
|
|
let _f: &mut File = &mut file;
|
|
}
|
|
|
|
let resp = file.respond_to(HttpRequest::default()).unwrap();
|
|
assert_eq!(
|
|
resp.headers().get(header::CONTENT_TYPE).unwrap(),
|
|
"text/x-toml"
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_named_file_status_code() {
|
|
let mut file = NamedFile::open("Cargo.toml")
|
|
.unwrap()
|
|
.set_status_code(StatusCode::NOT_FOUND)
|
|
.set_cpu_pool(CpuPool::new(1));
|
|
{
|
|
file.file();
|
|
let _f: &File = &file;
|
|
}
|
|
{
|
|
let _f: &mut File = &mut file;
|
|
}
|
|
|
|
let resp = file.respond_to(HttpRequest::default()).unwrap();
|
|
assert_eq!(
|
|
resp.headers().get(header::CONTENT_TYPE).unwrap(),
|
|
"text/x-toml"
|
|
);
|
|
assert_eq!(resp.status(), StatusCode::NOT_FOUND);
|
|
}
|
|
|
|
#[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.only_get().respond_to(req).unwrap();
|
|
assert_eq!(resp.status(), StatusCode::METHOD_NOT_ALLOWED);
|
|
}
|
|
|
|
#[test]
|
|
fn test_named_file_any_method() {
|
|
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::OK);
|
|
}
|
|
|
|
#[test]
|
|
fn test_static_files() {
|
|
let mut st = StaticFiles::new(".").show_files_listing();
|
|
st.accessible = false;
|
|
let resp = st.handle(HttpRequest::default())
|
|
.respond_to(HttpRequest::default())
|
|
.unwrap();
|
|
let resp = resp.as_response().expect("HTTP Response");
|
|
assert_eq!(resp.status(), StatusCode::NOT_FOUND);
|
|
|
|
st.accessible = true;
|
|
st.show_index = false;
|
|
let resp = st.handle(HttpRequest::default())
|
|
.respond_to(HttpRequest::default())
|
|
.unwrap();
|
|
let resp = resp.as_response().expect("HTTP Response");
|
|
assert_eq!(resp.status(), StatusCode::NOT_FOUND);
|
|
|
|
let mut req = HttpRequest::default();
|
|
req.match_info_mut().add("tail", "");
|
|
|
|
st.show_index = true;
|
|
let resp = st.handle(req)
|
|
.respond_to(HttpRequest::default())
|
|
.unwrap();
|
|
let resp = resp.as_response().expect("HTTP Response");
|
|
assert_eq!(
|
|
resp.headers().get(header::CONTENT_TYPE).unwrap(),
|
|
"text/html; charset=utf-8"
|
|
);
|
|
assert!(resp.body().is_binary());
|
|
assert!(format!("{:?}", resp.body()).contains("README.md"));
|
|
}
|
|
|
|
#[test]
|
|
fn test_redirect_to_index() {
|
|
let mut st = StaticFiles::new(".").index_file("index.html");
|
|
let mut req = HttpRequest::default();
|
|
req.match_info_mut().add("tail", "tests");
|
|
|
|
let resp = st.handle(req)
|
|
.respond_to(HttpRequest::default())
|
|
.unwrap();
|
|
let resp = resp.as_response().expect("HTTP Response");
|
|
assert_eq!(resp.status(), StatusCode::FOUND);
|
|
assert_eq!(
|
|
resp.headers().get(header::LOCATION).unwrap(),
|
|
"/tests/index.html"
|
|
);
|
|
|
|
let mut req = HttpRequest::default();
|
|
req.match_info_mut().add("tail", "tests/");
|
|
|
|
let resp = st.handle(req)
|
|
.respond_to(HttpRequest::default())
|
|
.unwrap();
|
|
let resp = resp.as_response().expect("HTTP Response");
|
|
assert_eq!(resp.status(), StatusCode::FOUND);
|
|
assert_eq!(
|
|
resp.headers().get(header::LOCATION).unwrap(),
|
|
"/tests/index.html"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_redirect_to_index_nested() {
|
|
let mut st = StaticFiles::new(".").index_file("Cargo.toml");
|
|
let mut req = HttpRequest::default();
|
|
req.match_info_mut().add("tail", "tools/wsload");
|
|
|
|
let resp = st.handle(req)
|
|
.respond_to(HttpRequest::default())
|
|
.unwrap();
|
|
let resp = resp.as_response().expect("HTTP Response");
|
|
assert_eq!(resp.status(), StatusCode::FOUND);
|
|
assert_eq!(
|
|
resp.headers().get(header::LOCATION).unwrap(),
|
|
"/tools/wsload/Cargo.toml"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn integration_redirect_to_index_with_prefix() {
|
|
let mut srv = test::TestServer::with_factory(|| {
|
|
App::new()
|
|
.prefix("public")
|
|
.handler("/", StaticFiles::new(".").index_file("Cargo.toml"))
|
|
});
|
|
|
|
let request = srv.get().uri(srv.url("/public")).finish().unwrap();
|
|
let response = srv.execute(request.send()).unwrap();
|
|
assert_eq!(response.status(), StatusCode::FOUND);
|
|
let loc = response
|
|
.headers()
|
|
.get(header::LOCATION)
|
|
.unwrap()
|
|
.to_str()
|
|
.unwrap();
|
|
assert_eq!(loc, "/public/Cargo.toml");
|
|
|
|
let request = srv.get().uri(srv.url("/public/")).finish().unwrap();
|
|
let response = srv.execute(request.send()).unwrap();
|
|
assert_eq!(response.status(), StatusCode::FOUND);
|
|
let loc = response
|
|
.headers()
|
|
.get(header::LOCATION)
|
|
.unwrap()
|
|
.to_str()
|
|
.unwrap();
|
|
assert_eq!(loc, "/public/Cargo.toml");
|
|
}
|
|
|
|
#[test]
|
|
fn integration_redirect_to_index() {
|
|
let mut srv = test::TestServer::with_factory(|| {
|
|
App::new().handler("test", StaticFiles::new(".").index_file("Cargo.toml"))
|
|
});
|
|
|
|
let request = srv.get().uri(srv.url("/test")).finish().unwrap();
|
|
let response = srv.execute(request.send()).unwrap();
|
|
assert_eq!(response.status(), StatusCode::FOUND);
|
|
let loc = response
|
|
.headers()
|
|
.get(header::LOCATION)
|
|
.unwrap()
|
|
.to_str()
|
|
.unwrap();
|
|
assert_eq!(loc, "/test/Cargo.toml");
|
|
|
|
let request = srv.get().uri(srv.url("/test/")).finish().unwrap();
|
|
let response = srv.execute(request.send()).unwrap();
|
|
assert_eq!(response.status(), StatusCode::FOUND);
|
|
let loc = response
|
|
.headers()
|
|
.get(header::LOCATION)
|
|
.unwrap()
|
|
.to_str()
|
|
.unwrap();
|
|
assert_eq!(loc, "/test/Cargo.toml");
|
|
}
|
|
|
|
#[test]
|
|
fn integration_percent_encoded() {
|
|
let mut srv = test::TestServer::with_factory(|| {
|
|
App::new().handler("test", StaticFiles::new(".").index_file("Cargo.toml"))
|
|
});
|
|
|
|
let request = srv.get()
|
|
.uri(srv.url("/test/%43argo.toml"))
|
|
.finish()
|
|
.unwrap();
|
|
let response = srv.execute(request.send()).unwrap();
|
|
assert_eq!(response.status(), StatusCode::OK);
|
|
}
|
|
}
|