add expect/continue support

src/context.rs

@@ -108,8 +108,8 @@ impl<A> HttpContext<A> where A: Actor<Context=Self> + Route {
     }
 
     /// Write payload
-    pub fn write(&mut self, data: Bytes) {
+    pub fn write<B: Into<Bytes>>(&mut self, data: B) {
-        self.stream.push_back(Frame::Payload(Some(data)))
+        self.stream.push_back(Frame::Payload(Some(data.into())))
     }
 
     /// Indicate end of streamimng payload

src/httpcodes.rs

@@ -12,10 +12,29 @@ use httpresponse::{Body, HttpResponse, HttpResponseBuilder};
 pub const HTTPOk: StaticResponse = StaticResponse(StatusCode::OK);
 pub const HTTPCreated: StaticResponse = StaticResponse(StatusCode::CREATED);
 pub const HTTPNoContent: StaticResponse = StaticResponse(StatusCode::NO_CONTENT);
+
 pub const HTTPBadRequest: StaticResponse = StaticResponse(StatusCode::BAD_REQUEST);
 pub const HTTPNotFound: StaticResponse = StaticResponse(StatusCode::NOT_FOUND);
+pub const HTTPUnauthorized: StaticResponse = StaticResponse(StatusCode::UNAUTHORIZED);
+pub const HTTPPaymentRequired: StaticResponse = StaticResponse(StatusCode::PAYMENT_REQUIRED);
 pub const HTTPForbidden: StaticResponse = StaticResponse(StatusCode::FORBIDDEN);
-pub const HTTPMethodNotAllowed: StaticResponse = StaticResponse(StatusCode::METHOD_NOT_ALLOWED);
+
+pub const HTTPMethodNotAllowed: StaticResponse =
+    StaticResponse(StatusCode::METHOD_NOT_ALLOWED);
+pub const HTTPNotAcceptable: StaticResponse = StaticResponse(StatusCode::NOT_ACCEPTABLE);
+pub const HTTPProxyAuthenticationRequired: StaticResponse =
+    StaticResponse(StatusCode::PROXY_AUTHENTICATION_REQUIRED);
+pub const HTTPRequestTimeout: StaticResponse = StaticResponse(StatusCode::REQUEST_TIMEOUT);
+pub const HTTPConflict: StaticResponse = StaticResponse(StatusCode::CONFLICT);
+pub const HTTPGone: StaticResponse = StaticResponse(StatusCode::GONE);
+pub const HTTPLengthRequired: StaticResponse = StaticResponse(StatusCode::LENGTH_REQUIRED);
+pub const HTTPPreconditionFailed: StaticResponse =
+    StaticResponse(StatusCode::PRECONDITION_FAILED);
+pub const HTTPPayloadTooLarge: StaticResponse = StaticResponse(StatusCode::PAYLOAD_TOO_LARGE);
+pub const HTTPUriTooLong: StaticResponse = StaticResponse(StatusCode::URI_TOO_LONG);
+pub const HTTPExpectationFailed: StaticResponse =
+    StaticResponse(StatusCode::EXPECTATION_FAILED);
+
 pub const HTTPInternalServerError: StaticResponse =
     StaticResponse(StatusCode::INTERNAL_SERVER_ERROR);
 
@@ -34,6 +53,9 @@ impl StaticResponse {
         resp.set_reason(reason);
         resp
     }
+    pub fn with_body(self, body: Body) -> HttpResponse {
+        HttpResponse::new(self.0, body)
+    }
 }
 
 impl<S> RouteHandler<S> for StaticResponse {

src/route.rs

@@ -4,6 +4,7 @@ use std::marker::PhantomData;
 
 use actix::Actor;
 use bytes::Bytes;
+use http::{header, Version};
 use futures::Stream;
 
 use task::Task;
@@ -11,7 +12,8 @@ use context::HttpContext;
 use resource::Reply;
 use payload::Payload;
 use httprequest::HttpRequest;
-use httpresponse::HttpResponse;
+use httpresponse::{Body, HttpResponse};
+use httpcodes::HTTPExpectationFailed;
 
 #[doc(hidden)]
 #[derive(Debug)]
@@ -31,11 +33,39 @@ pub trait RouteHandler<S>: 'static {
 }
 
 /// Actors with ability to handle http requests
+#[allow(unused_variables)]
 pub trait Route: Actor {
     /// Route shared state. State is shared with all routes within same application and could be
     /// accessed with `HttpContext::state()` method.
     type State;
 
+    /// Handle `EXPECT` header. By default respond with `HTTP/1.1 100 Continue`
+    fn expect(req: &HttpRequest, ctx: &mut Self::Context) -> Result<(), HttpResponse>
+        where Self: Actor<Context=HttpContext<Self>>
+    {
+        // handle expect header only for HTTP/1.1
+        if req.version() == Version::HTTP_11 {
+            if let Some(expect) = req.headers().get(header::EXPECT) {
+                if let Ok(expect) = expect.to_str() {
+                    if expect.to_lowercase() == "100-continue" {
+                        ctx.write("HTTP/1.1 100 Continue\r\n\r\n");
+                        Ok(())
+                    } else {
+                        Err(HTTPExpectationFailed.with_body(
+                            Body::Binary("Unknown Expect".into())))
+                    }
+                } else {
+                    Err(HTTPExpectationFailed.with_body(
+                        Body::Binary("Unknown Expect".into())))
+                }
+            } else {
+                Ok(())
+            }
+        } else {
+            Ok(())
+        }
+    }
+
     /// Handle incoming request. Route actor can return
     /// result immediately with `Reply::reply` or `Reply::with`.
     /// Actor itself could be returned for handling streaming request/response.
@@ -58,6 +88,13 @@ impl<A, S> RouteHandler<S> for RouteFactory<A, S>
     fn handle(&self, req: HttpRequest, payload: Payload, state: Rc<A::State>) -> Task
     {
         let mut ctx = HttpContext::new(state);
+
+        // handle EXPECT header
+        if req.headers().contains_key(header::EXPECT) {
+            if let Err(resp) = A::expect(&req, &mut ctx) {
+                return Task::reply(resp)
+            }
+        }
         A::request(req, payload, &mut ctx).into(ctx)
     }
 }

src/task.rs

@@ -74,6 +74,7 @@ pub struct Task {
     buffer: BytesMut,
     upgrade: bool,
     keepalive: bool,
+    prepared: bool,
 }
 
 impl Task {
@@ -92,6 +93,7 @@ impl Task {
             buffer: BytesMut::new(),
             upgrade: false,
             keepalive: false,
+            prepared: false,
         }
     }
 
@@ -107,6 +109,7 @@ impl Task {
             buffer: BytesMut::new(),
             upgrade: false,
             keepalive: false,
+            prepared: false,
         }
     }
 
@@ -122,6 +125,7 @@ impl Task {
         let body = msg.replace_body(Body::Empty);
         let version = msg.version().unwrap_or_else(|| req.version);
         self.keepalive = msg.keep_alive().unwrap_or_else(|| req.keep_alive);
+        self.prepared = true;
 
         match body {
             Body::Empty => {
@@ -248,8 +252,13 @@ impl Task {
                     Frame::Payload(chunk) => {
                         match chunk {
                             Some(chunk) => {
-                                // TODO: add warning, write after EOF
+                                if self.prepared {
-                                self.encoder.encode(&mut self.buffer, chunk.as_ref());
+                                    // TODO: add warning, write after EOF
+                                    self.encoder.encode(&mut self.buffer, chunk.as_ref());
+                                } else {
+                                    // might be response for EXCEPT
+                                    self.buffer.extend(chunk)
+                                }
                             }
                             None => {
                                 // TODO: add error "not eof""