mshtml: Added nsIChannel::Cancel implementation.

dlls/mshtml/binding.h

@@ -55,6 +55,8 @@ typedef struct {
     REQUEST_METHOD request_method;
     struct list response_headers;
     struct list request_headers;
+
+    nsChannelBSC *binding;
 } nsChannel;
 
 typedef struct {

dlls/mshtml/navigate.c

@@ -927,6 +927,8 @@ static HRESULT on_start_nsrequest(nsChannelBSC *This)
 {
     nsresult nsres;
 
+    This->nschannel->binding = This;
+
     /* FIXME: it's needed for http connections from BindToObject. */
     if(!This->nschannel->response_status)
         This->nschannel->response_status = 200;
@@ -972,12 +974,16 @@ static void on_stop_nsrequest(nsChannelBSC *This, HRESULT result)
             WARN("OnStopRequest failed: %08x\n", nsres);
     }
 
-    if(This->nschannel && This->nschannel->load_group) {
+    if(This->nschannel) {
+        if(This->nschannel->load_group) {
             nsres = nsILoadGroup_RemoveRequest(This->nschannel->load_group,
                     (nsIRequest*)&This->nschannel->nsIHttpChannel_iface, NULL, request_result);
             if(NS_FAILED(nsres))
                 ERR("RemoveRequest failed: %08x\n", nsres);
         }
+        if(This->nschannel->binding == This)
+            This->nschannel->binding = NULL;
+    }
 }
 
 static HRESULT read_stream_data(nsChannelBSC *This, IStream *stream)
@@ -1217,8 +1223,11 @@ static void nsChannelBSC_destroy(BSCallback *bsc)
 {
     nsChannelBSC *This = nsChannelBSC_from_BSCallback(bsc);
 
-    if(This->nschannel)
+    if(This->nschannel) {
+        if(This->nschannel->binding == This)
+            This->nschannel->binding = NULL;
         nsIHttpChannel_Release(&This->nschannel->nsIHttpChannel_iface);
+    }
     if(This->nslistener)
         nsIStreamListener_Release(This->nslistener);
     if(This->nscontext)

dlls/mshtml/nsio.c

@@ -617,9 +617,13 @@ static nsresult NSAPI nsChannel_Cancel(nsIHttpChannel *iface, nsresult aStatus)
 {
     nsChannel *This = impl_from_nsIHttpChannel(iface);
 
-    FIXME("(%p)->(%08x)\n", This, aStatus);
+    TRACE("(%p)->(%08x)\n", This, aStatus);
 
-    return NS_ERROR_NOT_IMPLEMENTED;
+    if(This->binding && This->binding->bsc.binding)
+        IBinding_Abort(This->binding->bsc.binding);
+    else
+        WARN("No binding to cancel\n");
+    return NS_OK;
 }
 
 static nsresult NSAPI nsChannel_Suspend(nsIHttpChannel *iface)