Send HTTP/1.1 100 Continue if request contains expect: continue header #634

CHANGES.md

@@ -1,11 +1,13 @@
 # Changes
 
-## [0.7.17] - 2018-xx-xx
+## [0.7.17] - 2018-12-23
 
 ### Added
 
 * Support for custom content types in `JsonConfig`. #637
 
+* Send `HTTP/1.1 100 Continue` if request contains `expect: continue` header #634
+
 ### Fixed
 
 * HTTP1 decoder should perform case-insentive comparison for client requests (e.g. `Keep-Alive`). #631

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "actix-web"
-version = "0.7.16"
+version = "0.7.17"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
 description = "Actix web is a simple, pragmatic and extremely fast web framework for Rust."
 readme = "README.md"
@@ -62,7 +62,7 @@ cell = ["actix-net/cell"]
 
 [dependencies]
 actix = "0.7.9"
-actix-net = "0.2.2"
+actix-net = "0.2.6"
 
 askama_escape = "0.1.0"
 base64 = "0.10"
@@ -105,7 +105,7 @@ slab = "0.4"
 tokio = "0.1"
 tokio-io = "0.1"
 tokio-tcp = "0.1"
-tokio-timer = "0.2"
+tokio-timer = "0.2.8"
 tokio-reactor = "0.1"
 tokio-current-thread = "0.1"
 

src/server/h1.rs

@@ -7,6 +7,7 @@ use futures::{Async, Future, Poll};
 use tokio_current_thread::spawn;
 use tokio_timer::Delay;
 
+use body::Binary;
 use error::{Error, PayloadError};
 use http::{StatusCode, Version};
 use payload::{Payload, PayloadStatus, PayloadWriter};
@@ -50,32 +51,40 @@ pub struct Http1Dispatcher<T: IoStream, H: HttpHandler + 'static> {
 }
 
 enum Entry<H: HttpHandler> {
-    Task(H::Task),
+    Task(H::Task, Option<()>),
     Error(Box<HttpHandlerTask>),
 }
 
 impl<H: HttpHandler> Entry<H> {
     fn into_task(self) -> H::Task {
         match self {
-            Entry::Task(task) => task,
+            Entry::Task(task, _) => task,
             Entry::Error(_) => panic!(),
         }
     }
     fn disconnected(&mut self) {
         match *self {
-            Entry::Task(ref mut task) => task.disconnected(),
+            Entry::Task(ref mut task, _) => task.disconnected(),
             Entry::Error(ref mut task) => task.disconnected(),
         }
     }
     fn poll_io(&mut self, io: &mut Writer) -> Poll<bool, Error> {
         match *self {
-            Entry::Task(ref mut task) => task.poll_io(io),
+            Entry::Task(ref mut task, ref mut except) => {
+                match except {
+                    Some(_) => {
+                        let _ = io.write(&Binary::from("HTTP/1.1 100 Continue\r\n\r\n"));
+                    }
+                    _ => (),
+                };
+                task.poll_io(io)
+            }
             Entry::Error(ref mut task) => task.poll_io(io),
         }
     }
     fn poll_completed(&mut self) -> Poll<(), Error> {
         match *self {
-            Entry::Task(ref mut task) => task.poll_completed(),
+            Entry::Task(ref mut task, _) => task.poll_completed(),
             Entry::Error(ref mut task) => task.poll_completed(),
         }
     }
@@ -463,7 +472,11 @@ where
 
         'outer: loop {
             match self.decoder.decode(&mut self.buf, &self.settings) {
-                Ok(Some(Message::Message { mut msg, payload })) => {
+                Ok(Some(Message::Message {
+                    mut msg,
+                    mut expect,
+                    payload,
+                })) => {
                     updated = true;
                     self.flags.insert(Flags::STARTED);
 
@@ -484,6 +497,12 @@ where
                     match self.settings.handler().handle(msg) {
                         Ok(mut task) => {
                             if self.tasks.is_empty() {
+                                if expect {
+                                    expect = false;
+                                    let _ = self.stream.write(&Binary::from(
+                                        "HTTP/1.1 100 Continue\r\n\r\n",
+                                    ));
+                                }
                                 match task.poll_io(&mut self.stream) {
                                     Ok(Async::Ready(ready)) => {
                                         // override keep-alive state
@@ -510,7 +529,10 @@ where
                                     }
                                 }
                             }
-                            self.tasks.push_back(Entry::Task(task));
+                            self.tasks.push_back(Entry::Task(
+                                task,
+                                if expect { Some(()) } else { None },
+                            ));
                             continue 'outer;
                         }
                         Err(_) => {
@@ -608,13 +630,13 @@ mod tests {
     impl Message {
         fn message(self) -> Request {
             match self {
-                Message::Message { msg, payload: _ } => msg,
+                Message::Message { msg, .. } => msg,
                 _ => panic!("error"),
             }
         }
         fn is_payload(&self) -> bool {
             match *self {
-                Message::Message { msg: _, payload } => payload,
+                Message::Message { payload, .. } => payload,
                 _ => panic!("error"),
             }
         }

src/server/h1decoder.rs

@@ -20,7 +20,11 @@ pub(crate) struct H1Decoder {
 
 #[derive(Debug)]
 pub(crate) enum Message {
-    Message { msg: Request, payload: bool },
+    Message {
+        msg: Request,
+        payload: bool,
+        expect: bool,
+    },
     Chunk(Bytes),
     Eof,
 }
@@ -63,10 +67,11 @@ impl H1Decoder {
             .parse_message(src, settings)
             .map_err(DecoderError::Error)?
         {
-            Async::Ready((msg, decoder)) => {
+            Async::Ready((msg, expect, decoder)) => {
                 self.decoder = decoder;
                 Ok(Some(Message::Message {
                     msg,
+                    expect,
                     payload: self.decoder.is_some(),
                 }))
             }
@@ -85,11 +90,12 @@ impl H1Decoder {
         &self,
         buf: &mut BytesMut,
         settings: &ServiceConfig<H>,
-    ) -> Poll<(Request, Option<EncodingDecoder>), ParseError> {
+    ) -> Poll<(Request, bool, Option<EncodingDecoder>), ParseError> {
         // Parse http message
         let mut has_upgrade = false;
         let mut chunked = false;
         let mut content_length = None;
+        let mut expect_continue = false;
 
         let msg = {
             // Unsafe: we read only this data only after httparse parses headers into.
@@ -165,11 +171,17 @@ impl H1Decoder {
                             }
                             // connection keep-alive state
                             header::CONNECTION => {
-                                let ka = if let Ok(conn) = value.to_str().map(|conn| conn.trim()) {
+                                let ka = if let Ok(conn) =
-                                    if version == Version::HTTP_10 && conn.eq_ignore_ascii_case("keep-alive") {
+                                    value.to_str().map(|conn| conn.trim())
+                                {
+                                    if version == Version::HTTP_10
+                                        && conn.eq_ignore_ascii_case("keep-alive")
+                                    {
                                         true
                                     } else {
-                                        version == Version::HTTP_11 && !(conn.eq_ignore_ascii_case("close") || conn.eq_ignore_ascii_case("upgrade"))
+                                        version == Version::HTTP_11
+                                            && !(conn.eq_ignore_ascii_case("close")
+                                                || conn.eq_ignore_ascii_case("upgrade"))
                                     }
                                 } else {
                                     false
@@ -186,6 +198,11 @@ impl H1Decoder {
                                     }
                                 }
                             }
+                            header::EXPECT => {
+                                if value == "100-continue" {
+                                    expect_continue = true
+                                }
+                            }
                             _ => (),
                         }
 
@@ -216,7 +233,7 @@ impl H1Decoder {
             None
         };
 
-        Ok(Async::Ready((msg, decoder)))
+        Ok(Async::Ready((msg, expect_continue, decoder)))
     }
 }