chrome/renderer/prefetch_helper.cc

   1 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/renderer/prefetch_helper.h"
   6
   7 #include "chrome/common/prefetch_messages.h"
   8 #include "content/public/renderer/render_frame.h"
   9 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  10 #include "third_party/WebKit/public/web/WebURLLoaderOptions.h"
  11
  12 namespace prefetch {
  13
  14 PrefetchHelper::PrefetchHelper(content::RenderFrame* render_frame)
  15     : content::RenderFrameObserver(render_frame) {
  16 }
  17
  18 PrefetchHelper::~PrefetchHelper() {
  19   STLDeleteElements(&loader_set_);
  20 }
  21
  22 bool PrefetchHelper::OnMessageReceived(
  23     const IPC::Message& message) {
  24   bool handled = true;
  25   IPC_BEGIN_MESSAGE_MAP(PrefetchHelper, message)
  26     IPC_MESSAGE_HANDLER(PrefetchMsg_Prefetch, OnPrefetch)
  27     IPC_MESSAGE_UNHANDLED(handled = false)
  28   IPC_END_MESSAGE_MAP()
  29
  30   return handled;
  31 }
  32
  33 void PrefetchHelper::OnPrefetch(const GURL& url) {
  34   blink::WebFrame* frame = render_frame()->GetWebFrame();
  35   blink::WebURLRequest request(url);
  36   request.setRequestContext(blink::WebURLRequest::RequestContextPrefetch);
  37   request.setPriority(blink::WebURLRequest::PriorityVeryLow);
  38   blink::WebURLLoaderOptions options;
  39   options.allowCredentials = true;
  40   options.crossOriginRequestPolicy =
  41       blink::WebURLLoaderOptions::CrossOriginRequestPolicyAllow;
  42   blink::WebURLLoader* loader = frame->createAssociatedURLLoader(options);
  43   loader->loadAsynchronously(request, this);
  44   loader_set_.insert(loader);
  45 }
  46
  47 void PrefetchHelper::didFinishLoading(blink::WebURLLoader* loader,
  48                                       double finishTime,
  49                                       int64_t totalEncodedDataLength) {
  50   loader_set_.erase(loader);
  51 }
  52
  53 void PrefetchHelper::didFail(blink::WebURLLoader* loader,
  54                              const blink::WebURLError& error) {
  55   loader_set_.erase(loader);
  56 }
  57
  58 }  // namespace prefetch