content/renderer/fetchers/resource_fetcher_impl.h

   1 // Copyright (c) 2011 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 #ifndef CONTENT_RENDERER_FETCHERS_RESOURCE_FETCHER_H_
   6 #define CONTENT_RENDERER_FETCHERS_RESOURCE_FETCHER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/timer/timer.h"
  15 #include "content/public/renderer/resource_fetcher.h"
  16 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  17 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  18 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  19
  20 class GURL;
  21
  22 namespace blink {
  23 class WebFrame;
  24 class WebURLLoader;
  25 struct WebURLError;
  26 }
  27
  28 namespace content {
  29
  30 class ResourceFetcherImpl : public ResourceFetcher,
  31                             public blink::WebURLLoaderClient {
  32  public:
  33   // ResourceFetcher implementation:
  34   virtual void SetMethod(const std::string& method) OVERRIDE;
  35   virtual void SetBody(const std::string& body) OVERRIDE;
  36   virtual void SetHeader(const std::string& header,
  37                          const std::string& value) OVERRIDE;
  38   virtual void Start(blink::WebFrame* frame,
  39                      blink::WebURLRequest::TargetType target_type,
  40                      const Callback& callback) OVERRIDE;
  41   virtual void SetTimeout(const base::TimeDelta& timeout) OVERRIDE;
  42
  43  private:
  44   friend class ResourceFetcher;
  45
  46   explicit ResourceFetcherImpl(const GURL& url);
  47
  48   virtual ~ResourceFetcherImpl();
  49
  50   void RunCallback(const blink::WebURLResponse& response,
  51                    const std::string& data);
  52
  53   // Callback for timer that limits how long we wait for the server.  If this
  54   // timer fires and the request hasn't completed, we kill the request.
  55   void TimeoutFired();
  56
  57   // WebURLLoaderClient methods:
  58   virtual void willSendRequest(
  59       blink::WebURLLoader* loader, blink::WebURLRequest& new_request,
  60       const blink::WebURLResponse& redirect_response);
  61   virtual void didSendData(
  62       blink::WebURLLoader* loader, unsigned long long bytes_sent,
  63       unsigned long long total_bytes_to_be_sent);
  64   virtual void didReceiveResponse(
  65       blink::WebURLLoader* loader, const blink::WebURLResponse& response);
  66   virtual void didReceiveCachedMetadata(
  67       blink::WebURLLoader* loader, const char* data, int data_length);
  68
  69   virtual void didReceiveData(
  70       blink::WebURLLoader* loader, const char* data, int data_length,
  71       int encoded_data_length);
  72   virtual void didFinishLoading(
  73       blink::WebURLLoader* loader, double finishTime,
  74       int64_t total_encoded_data_length);
  75   virtual void didFail(
  76       blink::WebURLLoader* loader, const blink::WebURLError& error);
  77
  78   scoped_ptr<blink::WebURLLoader> loader_;
  79
  80   // Request to send.  Released once Start() is called.
  81   blink::WebURLRequest request_;
  82
  83   // Set to true once the request is complete.
  84   bool completed_;
  85
  86   // Buffer to hold the content from the server.
  87   std::string data_;
  88
  89   // A copy of the original resource response.
  90   blink::WebURLResponse response_;
  91
  92   // Callback when we're done.
  93   Callback callback_;
  94
  95   // Buffer to hold metadata from the cache.
  96   std::string metadata_;
  97
  98   // Limit how long to wait for the server.
  99   base::OneShotTimer<ResourceFetcherImpl> timeout_timer_;
 100
 101   DISALLOW_COPY_AND_ASSIGN(ResourceFetcherImpl);
 102 };
 103
 104 }  // namespace content
 105
 106 #endif  // CONTENT_RENDERER_FETCHERS_RESOURCE_FETCHER_H_