diff -r 000000000000 -r 6474c204b198 netwerk/protocol/data/nsDataChannel.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/protocol/data/nsDataChannel.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+// data implementation
+
+#include "nsDataChannel.h"
+
+#include "mozilla/Base64.h"
+#include "nsIOService.h"
+#include "nsDataHandler.h"
+#include "nsIPipe.h"
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+#include "nsEscape.h"
+
+using namespace mozilla;
+
+nsresult
+nsDataChannel::OpenContentStream(bool async, nsIInputStream **result,
+                                 nsIChannel** channel)
+{
+    NS_ENSURE_TRUE(URI(), NS_ERROR_NOT_INITIALIZED);
+
+    nsresult rv;
+
+    nsAutoCString spec;
+    rv = URI()->GetAsciiSpec(spec);
+    if (NS_FAILED(rv)) return rv;
+
+    nsCString contentType, contentCharset, dataBuffer, hashRef;
+    bool lBase64;
+    rv = nsDataHandler::ParseURI(spec, contentType, contentCharset,
+                                 lBase64, dataBuffer, hashRef);
+
+    NS_UnescapeURL(dataBuffer);
+
+    if (lBase64) {
+        // Don't allow spaces in base64-encoded content. This is only
+        // relevant for escaped spaces; other spaces are stripped in
+        // NewURI.
+        dataBuffer.StripWhitespace();
+    }
+    
+    nsCOMPtr<nsIInputStream> bufInStream;
+    nsCOMPtr<nsIOutputStream> bufOutStream;
+    
+    // create an unbounded pipe.
+    rv = NS_NewPipe(getter_AddRefs(bufInStream),
+                    getter_AddRefs(bufOutStream),
+                    nsIOService::gDefaultSegmentSize,
+                    UINT32_MAX,
+                    async, true);
+    if (NS_FAILED(rv))
+        return rv;
+
+    uint32_t contentLen;
+    if (lBase64) {
+        const uint32_t dataLen = dataBuffer.Length();
+        int32_t resultLen = 0;
+        if (dataLen >= 1 && dataBuffer[dataLen-1] == '=') {
+            if (dataLen >= 2 && dataBuffer[dataLen-2] == '=')
+                resultLen = dataLen-2;
+            else
+                resultLen = dataLen-1;
+        } else {
+            resultLen = dataLen;
+        }
+        resultLen = ((resultLen * 3) / 4);
+
+        nsAutoCString decodedData;
+        rv = Base64Decode(dataBuffer, decodedData);
+        NS_ENSURE_SUCCESS(rv, rv);
+        rv = bufOutStream->Write(decodedData.get(), resultLen, &contentLen);
+    } else {
+        rv = bufOutStream->Write(dataBuffer.get(), dataBuffer.Length(), &contentLen);
+    }
+    if (NS_FAILED(rv))
+        return rv;
+
+    SetContentType(contentType);
+    SetContentCharset(contentCharset);
+    mContentLength = contentLen;
+
+    NS_ADDREF(*result = bufInStream);
+
+    return NS_OK;
+}