Bug 966439 - BroadcastChannel API - patch 7 - Blob supported, r=bent

dom/broadcastchannel/BroadcastChannel.cpp

@@ -190,18 +190,28 @@ public:
       return NS_OK;
     }
 
-    BroadcastChannelMessageData message;
+    ClonedMessageData message;
 
     SerializedStructuredCloneBuffer& buffer = message.data();
     buffer.data = mData->mBuffer.data();
     buffer.dataLength = mData->mBuffer.nbytes();
 
-#ifdef DEBUG
-    {
-      const nsTArray<nsRefPtr<File>>& blobs = mData->mClosure.mBlobs;
-      MOZ_ASSERT(blobs.IsEmpty());
+    PBackgroundChild* backgroundManager = mActor->Manager();
+    MOZ_ASSERT(backgroundManager);
+
+    const nsTArray<nsRefPtr<File>>& blobs = mData->mClosure.mBlobs;
+
+    if (!blobs.IsEmpty()) {
+      message.blobsChild().SetCapacity(blobs.Length());
+
+      for (uint32_t i = 0, len = blobs.Length(); i < len; ++i) {
+        PBlobChild* blobChild =
+          BackgroundChild::GetOrCreateActorForBlob(backgroundManager, blobs[i]);
+        MOZ_ASSERT(blobChild);
+
+        message.blobsChild().AppendElement(blobChild);
+      }
     }
-#endif
 
     mActor->SendPostMessage(message);
     return NS_OK;
@@ -270,9 +280,6 @@ public:
   virtual bool Notify(JSContext* aCx, workers::Status aStatus) MOZ_OVERRIDE
   {
     if (aStatus >= Canceling) {
-      WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(aCx);
-      MOZ_ASSERT(workerPrivate);
-
       mChannel->Shutdown();
     }
 

dom/broadcastchannel/BroadcastChannel.h

@@ -24,7 +24,7 @@ class WorkerFeature;
 }
 
 class BroadcastChannelChild;
-struct BroadcastChannelMessage;
+class BroadcastChannelMessage;
 
 class BroadcastChannel MOZ_FINAL
   : public DOMEventTargetHelper

dom/broadcastchannel/BroadcastChannelChild.cpp

@@ -6,6 +6,8 @@
 #include "BroadcastChannelChild.h"
 #include "BroadcastChannel.h"
 #include "jsapi.h"
+#include "mozilla/dom/ipc/BlobChild.h"
+#include "mozilla/dom/File.h"
 #include "mozilla/dom/MessageEvent.h"
 #include "mozilla/dom/MessageEventBinding.h"
 #include "mozilla/dom/StructuredCloneUtils.h"
@@ -37,7 +39,7 @@ BroadcastChannelChild::~BroadcastChannelChild()
 }
 
 bool
-BroadcastChannelChild::RecvNotify(const BroadcastChannelMessageData& aData)
+BroadcastChannelChild::RecvNotify(const ClonedMessageData& aData)
 {
   nsCOMPtr<DOMEventTargetHelper> helper = mBC;
   nsCOMPtr<EventTarget> eventTarget = do_QueryInterface(helper);
@@ -76,6 +78,18 @@ BroadcastChannelChild::RecvNotify(const BroadcastChannelMessageData& aData)
   cloneData.mData = buffer.data;
   cloneData.mDataLength = buffer.dataLength;
 
+  if (!aData.blobsChild().IsEmpty()) {
+    cloneData.mClosure.mBlobs.SetCapacity(aData.blobsChild().Length());
+
+    for (uint32_t i = 0, len = aData.blobsChild().Length(); i < len; ++i) {
+      nsRefPtr<FileImpl> impl =
+        static_cast<BlobChild*>(aData.blobsChild()[i])->GetBlobImpl();
+
+      nsRefPtr<File> blob = new File(mBC->GetOwner(), impl);
+      cloneData.mClosure.mBlobs.AppendElement(blob);
+    }
+  }
+
   JS::Rooted<JS::Value> value(cx, JS::NullValue());
   if (cloneData.mDataLength && !ReadStructuredClone(cx, cloneData, &value)) {
     JS_ClearPendingException(cx);

dom/broadcastchannel/BroadcastChannelChild.h

@@ -29,8 +29,7 @@ public:
     mBC = aBC;
   }
 
-  virtual bool RecvNotify(const BroadcastChannelMessageData& aData)
-                                                                   MOZ_OVERRIDE;
+  virtual bool RecvNotify(const ClonedMessageData& aData) MOZ_OVERRIDE;
 
   bool IsActorDestroyed() const
   {

dom/broadcastchannel/BroadcastChannelParent.cpp

@@ -5,6 +5,8 @@
 
 #include "BroadcastChannelParent.h"
 #include "BroadcastChannelService.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/ipc/BlobParent.h"
 #include "mozilla/ipc/BackgroundParent.h"
 #include "mozilla/unused.h"
 
@@ -31,8 +33,7 @@ BroadcastChannelParent::~BroadcastChannelParent()
 }
 
 bool
-BroadcastChannelParent::RecvPostMessage(
-                                       const BroadcastChannelMessageData& aData)
+BroadcastChannelParent::RecvPostMessage(const ClonedMessageData& aData)
 {
   AssertIsOnBackgroundThread();
 
@@ -74,15 +75,37 @@ BroadcastChannelParent::ActorDestroy(ActorDestroyReason aWhy)
 }
 
 void
-BroadcastChannelParent::CheckAndDeliver(
-                                       const BroadcastChannelMessageData& aData,
-                                       const nsString& aOrigin,
-                                       const nsString& aChannel)
+BroadcastChannelParent::CheckAndDeliver(const ClonedMessageData& aData,
+                                        const nsString& aOrigin,
+                                        const nsString& aChannel)
 {
   AssertIsOnBackgroundThread();
 
   if (aOrigin == mOrigin && aChannel == mChannel) {
-    unused << SendNotify(aData);
+    // We need to duplicate data only if we have blobs.
+    if (aData.blobsParent().IsEmpty()) {
+      unused << SendNotify(aData);
+      return;
+    }
+
+    // Duplicate the data for this parent.
+    ClonedMessageData newData(aData);
+
+    // Ricreate the BlobParent for this new message.
+    for (uint32_t i = 0, len = newData.blobsParent().Length(); i < len; ++i) {
+      nsRefPtr<FileImpl> impl =
+        static_cast<BlobParent*>(newData.blobsParent()[i])->GetBlobImpl();
+
+      PBlobParent* blobParent =
+        BackgroundParent::GetOrCreateActorForBlobImpl(Manager(), impl);
+      if (!blobParent) {
+        return;
+      }
+
+      newData.blobsParent()[i] = blobParent;
+    }
+
+    unused << SendNotify(newData);
   }
 }
 

dom/broadcastchannel/BroadcastChannelParent.h

@@ -22,7 +22,7 @@ class BroadcastChannelParent MOZ_FINAL : public PBroadcastChannelParent
   friend class mozilla::ipc::BackgroundParentImpl;
 
 public:
-  void CheckAndDeliver(const BroadcastChannelMessageData& aData,
+  void CheckAndDeliver(const ClonedMessageData& aData,
                        const nsString& aOrigin,
                        const nsString& aChannel);
 
@@ -32,7 +32,7 @@ private:
   ~BroadcastChannelParent();
 
   virtual bool
-  RecvPostMessage(const BroadcastChannelMessageData& aData) MOZ_OVERRIDE;
+  RecvPostMessage(const ClonedMessageData& aData) MOZ_OVERRIDE;
 
   virtual bool RecvClose() MOZ_OVERRIDE;
 

dom/broadcastchannel/BroadcastChannelService.cpp

@@ -75,7 +75,7 @@ namespace {
 struct MOZ_STACK_CLASS PostMessageData MOZ_FINAL
 {
   PostMessageData(BroadcastChannelParent* aParent,
-                  const BroadcastChannelMessageData& aData,
+                  const ClonedMessageData& aData,
                   const nsAString& aOrigin,
                   const nsAString& aChannel)
     : mParent(aParent)
@@ -93,7 +93,7 @@ struct MOZ_STACK_CLASS PostMessageData MOZ_FINAL
   }
 
   BroadcastChannelParent* mParent;
-  const BroadcastChannelMessageData& mData;
+  const ClonedMessageData& mData;
   const nsString mOrigin;
   const nsString mChannel;
 };
@@ -118,7 +118,7 @@ PostMessageEnumerator(nsPtrHashKey<BroadcastChannelParent>* aKey, void* aPtr)
 
 void
 BroadcastChannelService::PostMessage(BroadcastChannelParent* aParent,
-                                     const BroadcastChannelMessageData& aData,
+                                     const ClonedMessageData& aData,
                                      const nsAString& aOrigin,
                                      const nsAString& aChannel)
 {

dom/broadcastchannel/BroadcastChannelService.h

@@ -13,7 +13,7 @@ namespace mozilla {
 namespace dom {
 
 class BroadcastChannelParent;
-class BroadcastChannelMessageData;
+class ClonedMessageData;
 
 class BroadcastChannelService MOZ_FINAL
 {
@@ -26,7 +26,7 @@ public:
   void UnregisterActor(BroadcastChannelParent* aParent);
 
   void PostMessage(BroadcastChannelParent* aParent,
-                   const BroadcastChannelMessageData& aData,
+                   const ClonedMessageData& aData,
                    const nsAString& aOrigin,
                    const nsAString& aChannel);
 

dom/broadcastchannel/PBroadcastChannel.ipdl

@@ -3,28 +3,25 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 include protocol PBackground;
+include protocol PBlob;
+include DOMTypes;
 
 using struct mozilla::SerializedStructuredCloneBuffer from "ipc/IPCMessageUtils.h";
 
 namespace mozilla {
 namespace dom {
 
-struct BroadcastChannelMessageData
-{
-  SerializedStructuredCloneBuffer data;
-};
-
 // This protocol is used for the BroadcastChannel API
 protocol PBroadcastChannel
 {
   manager PBackground;
 
 parent:
-  PostMessage(BroadcastChannelMessageData message);
+  PostMessage(ClonedMessageData message);
   Close();
 
 child:
-  Notify(BroadcastChannelMessageData message);
+  Notify(ClonedMessageData message);
   __delete__();
 };
 

dom/broadcastchannel/tests/test_broadcastchannel_any.html

@@ -19,6 +19,7 @@ var tests = [
  new Date(),
  [ 1, 'test', true, new Date() ],
  { a: true, b:  null, c: new Date(), d: [ true, false, {} ] },
+ new Blob([123], { type: 'plain/text' })
 ];
 
 var currentTest = null;

dom/ipc/StructuredCloneUtils.cpp

@@ -26,15 +26,17 @@ namespace {
 void
 Error(JSContext* aCx, uint32_t aErrorId)
 {
-  MOZ_ASSERT(NS_IsMainThread());
-  NS_DOMStructuredCloneError(aCx, aErrorId);
+  if (NS_IsMainThread()) {
+    NS_DOMStructuredCloneError(aCx, aErrorId);
+  } else {
+    Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
+  }
 }
 
 JSObject*
 Read(JSContext* aCx, JSStructuredCloneReader* aReader, uint32_t aTag,
      uint32_t aData, void* aClosure)
 {
-  MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(aClosure);
 
   StructuredCloneClosure* closure =
@@ -80,7 +82,6 @@ bool
 Write(JSContext* aCx, JSStructuredCloneWriter* aWriter,
       JS::Handle<JSObject*> aObj, void* aClosure)
 {
-  MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(aClosure);
 
   StructuredCloneClosure* closure =