diff -r 000000000000 -r 6474c204b198 netwerk/base/src/nsSimpleStreamListener.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/base/src/nsSimpleStreamListener.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsSimpleStreamListener.h"
+
+//
+//----------------------------------------------------------------------------
+// nsISupports implementation...
+//----------------------------------------------------------------------------
+//
+NS_IMPL_ISUPPORTS(nsSimpleStreamListener,
+                  nsISimpleStreamListener,
+                  nsIStreamListener,
+                  nsIRequestObserver)
+
+//
+//----------------------------------------------------------------------------
+// nsIRequestObserver implementation...
+//----------------------------------------------------------------------------
+//
+NS_IMETHODIMP
+nsSimpleStreamListener::OnStartRequest(nsIRequest *aRequest,
+                                       nsISupports *aContext)
+{
+    return mObserver ?
+        mObserver->OnStartRequest(aRequest, aContext) : NS_OK;
+}
+
+NS_IMETHODIMP
+nsSimpleStreamListener::OnStopRequest(nsIRequest* request,
+                                      nsISupports *aContext,
+                                      nsresult aStatus)
+{
+    return mObserver ?
+        mObserver->OnStopRequest(request, aContext, aStatus) : NS_OK;
+}
+
+//
+//----------------------------------------------------------------------------
+// nsIStreamListener implementation...
+//----------------------------------------------------------------------------
+//
+NS_IMETHODIMP
+nsSimpleStreamListener::OnDataAvailable(nsIRequest* request,
+                                        nsISupports *aContext,
+                                        nsIInputStream *aSource,
+                                        uint64_t aOffset,
+                                        uint32_t aCount)
+{
+    uint32_t writeCount;
+    nsresult rv = mSink->WriteFrom(aSource, aCount, &writeCount);
+    //
+    // Equate zero bytes read and NS_SUCCEEDED to stopping the read.
+    //
+    if (NS_SUCCEEDED(rv) && (writeCount == 0))
+        return NS_BASE_STREAM_CLOSED;
+    return rv;
+}
+
+//
+//----------------------------------------------------------------------------
+// nsISimpleStreamListener implementation...
+//----------------------------------------------------------------------------
+//
+NS_IMETHODIMP
+nsSimpleStreamListener::Init(nsIOutputStream *aSink,
+                             nsIRequestObserver *aObserver)
+{
+    NS_PRECONDITION(aSink, "null output stream");
+
+    mSink = aSink;
+    mObserver = aObserver;
+
+    return NS_OK;
+}