Fetch cancellation: Add cancel_chan to FetchContext

components/constellation/network_listener.rs

@@ -57,14 +57,14 @@ impl NetworkListener {
             Some(ref res_init_) => CoreResourceMsg::FetchRedirect(
                                    self.req_init.clone(),
                                    res_init_.clone(),
-                                   ipc_sender),
+                                   ipc_sender, None),
             None => {
                 set_default_accept(Destination::Document, &mut listener.req_init.headers);
                 set_default_accept_language(&mut listener.req_init.headers);
 
                 CoreResourceMsg::Fetch(
                 listener.req_init.clone(),
-                FetchChannels::ResponseMsg(ipc_sender))
+                FetchChannels::ResponseMsg(ipc_sender, None))
             }
         };
 

components/net/fetch/methods.rs

@@ -15,6 +15,7 @@ use hyper::header::{Header, HeaderFormat, HeaderView, Headers, Referer as Refere
 use hyper::method::Method;
 use hyper::mime::{Mime, SubLevel, TopLevel};
 use hyper::status::StatusCode;
+use ipc_channel::ipc::IpcReceiver;
 use mime_guess::guess_mime_type;
 use net_traits::{FetchTaskTarget, NetworkError, ReferrerPolicy};
 use net_traits::request::{CredentialsMode, Destination, Referrer, Request, RequestMode};
@@ -43,6 +44,7 @@ pub struct FetchContext {
     pub user_agent: Cow<'static, str>,
     pub devtools_chan: Option<Sender<DevtoolsControlMsg>>,
     pub filemanager: FileManager,
+    pub cancel_chan: Option<IpcReceiver<()>>,
 }
 
 pub type DoneChannel = Option<(Sender<Data>, Receiver<Data>)>;

components/net/resource_thread.rs

@@ -157,14 +157,14 @@ impl ResourceChannelManager {
         match msg {
             CoreResourceMsg::Fetch(req_init, channels) => {
                 match channels {
-                    FetchChannels::ResponseMsg(sender) =>
-                        self.resource_manager.fetch(req_init, None, sender, http_state),
+                    FetchChannels::ResponseMsg(sender, cancel_chan) =>
+                        self.resource_manager.fetch(req_init, None, sender, http_state, cancel_chan),
                     FetchChannels::WebSocket { event_sender, action_receiver } =>
                         self.resource_manager.websocket_connect(req_init, event_sender, action_receiver, http_state),
                 }
             }
-            CoreResourceMsg::FetchRedirect(req_init, res_init, sender) =>
-                self.resource_manager.fetch(req_init, Some(res_init), sender, http_state),
+            CoreResourceMsg::FetchRedirect(req_init, res_init, sender, cancel_chan) =>
+                self.resource_manager.fetch(req_init, Some(res_init), sender, http_state, cancel_chan),
             CoreResourceMsg::SetCookieForUrl(request, cookie, source) =>
                 self.resource_manager.set_cookie_for_url(&request, cookie.into_inner(), source, http_state),
             CoreResourceMsg::SetCookiesForUrl(request, cookies, source) => {
@@ -329,7 +329,8 @@ impl CoreResourceManager {
              req_init: RequestInit,
              res_init_: Option<ResponseInit>,
              mut sender: IpcSender<FetchResponseMsg>,
-             http_state: &Arc<HttpState>) {
+             http_state: &Arc<HttpState>,
+             cancel_chan: Option<IpcReceiver<()>>) {
         let http_state = http_state.clone();
         let ua = self.user_agent.clone();
         let dc = self.devtools_chan.clone();
@@ -346,6 +347,7 @@ impl CoreResourceManager {
                 user_agent: ua,
                 devtools_chan: dc,
                 filemanager: filemanager,
+                cancel_chan: cancel_chan,
             };
 
             match res_init_ {

components/net_traits/lib.rs

@@ -342,7 +342,7 @@ pub enum WebSocketNetworkEvent {
 #[derive(Deserialize, Serialize)]
 /// IPC channels to communicate with the script thread about network or DOM events.
 pub enum FetchChannels {
-    ResponseMsg(IpcSender<FetchResponseMsg>),
+    ResponseMsg(IpcSender<FetchResponseMsg>, /* cancel_chan */ Option<IpcReceiver<()>>),
     WebSocket {
         event_sender: IpcSender<WebSocketNetworkEvent>,
         action_receiver: IpcReceiver<WebSocketDomAction>,
@@ -353,7 +353,7 @@ pub enum FetchChannels {
 pub enum CoreResourceMsg {
     Fetch(RequestInit, FetchChannels),
     /// Initiate a fetch in response to processing a redirection
-    FetchRedirect(RequestInit, ResponseInit, IpcSender<FetchResponseMsg>),
+    FetchRedirect(RequestInit, ResponseInit, IpcSender<FetchResponseMsg>, /* cancel_chan */ Option<IpcReceiver<()>>),
     /// Store a cookie for a given originating URL
     SetCookieForUrl(ServoUrl, Serde<Cookie<'static>>, CookieSource),
     /// Store a set of cookies for a given originating URL
@@ -383,7 +383,7 @@ pub fn fetch_async<F>(request: RequestInit, core_resource_thread: &CoreResourceT
     ROUTER.add_route(action_receiver.to_opaque(),
                      Box::new(move |message| f(message.to().unwrap())));
     core_resource_thread.send(
-        CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(action_sender))).unwrap();
+        CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(action_sender, None))).unwrap();
 }
 
 #[derive(Clone, Deserialize, MallocSizeOf, Serialize)]
@@ -478,7 +478,7 @@ pub fn load_whole_resource(request: RequestInit,
                            -> Result<(Metadata, Vec<u8>), NetworkError> {
     let (action_sender, action_receiver) = ipc::channel().unwrap();
     core_resource_thread.send(
-        CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(action_sender))).unwrap();
+        CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(action_sender, None))).unwrap();
 
     let mut buf = vec![];
     let mut metadata = None;

components/script/document_loader.rs

@@ -126,7 +126,7 @@ impl DocumentLoader {
                                   request: RequestInit,
                                   fetch_target: IpcSender<FetchResponseMsg>) {
         self.resource_threads.sender().send(
-            CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(fetch_target))).unwrap();
+            CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(fetch_target, None))).unwrap();
     }
 
     /// Mark an in-progress network request complete.

components/script/dom/eventsource.rs

@@ -491,7 +491,7 @@ impl EventSource {
             listener.notify_fetch(message.to().unwrap());
         }));
         global.core_resource_thread().send(
-            CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(action_sender))).unwrap();
+            CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(action_sender, None))).unwrap();
         // Step 13
         Ok(ev)
     }
@@ -555,6 +555,6 @@ impl EventSourceTimeoutCallback {
         }
         // Step 5.4
         global.core_resource_thread().send(
-            CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(self.action_sender))).unwrap();
+            CoreResourceMsg::Fetch(request, FetchChannels::ResponseMsg(self.action_sender, None))).unwrap();
     }
 }

components/script/dom/xmlhttprequest.rs

@@ -264,7 +264,7 @@ impl XMLHttpRequest {
             listener.notify_fetch(message.to().unwrap());
         }));
         global.core_resource_thread().send(
-            Fetch(init, FetchChannels::ResponseMsg(action_sender))).unwrap();
+            Fetch(init, FetchChannels::ResponseMsg(action_sender, None))).unwrap();
     }
 }
 

components/script/fetch.rs

@@ -108,7 +108,7 @@ pub fn Fetch(global: &GlobalScope, input: RequestInfo, init: RootedTraceableBox<
         listener.notify_fetch(message.to().unwrap());
     }));
     core_resource_thread.send(
-        NetTraitsFetch(request_init, FetchChannels::ResponseMsg(action_sender))).unwrap();
+        NetTraitsFetch(request_init, FetchChannels::ResponseMsg(action_sender, None))).unwrap();
 
     promise
 }

tests/unit/net/fetch.rs

@@ -538,6 +538,7 @@ fn test_fetch_with_hsts() {
         user_agent: DEFAULT_USER_AGENT.into(),
         devtools_chan: None,
         filemanager: FileManager::new(),
+        cancel_chan: None,
     };
 
     {

tests/unit/net/lib.rs

@@ -61,6 +61,7 @@ fn new_fetch_context(dc: Option<Sender<DevtoolsControlMsg>>) -> FetchContext {
         user_agent: DEFAULT_USER_AGENT.into(),
         devtools_chan: dc,
         filemanager: FileManager::new(),
+        cancel_chan: None,
     }
 }
 impl FetchTaskTarget for FetchResponseCollector {