content/browser/loader/async_resource_handler.h

   1 // Copyright (c) 2012 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_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_
   6 #define CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/timer/timer.h"
  12 #include "content/browser/loader/resource_handler.h"
  13 #include "content/browser/loader/resource_message_delegate.h"
  14 #include "url/gurl.h"
  15
  16 namespace net {
  17 class URLRequest;
  18 }
  19
  20 namespace content {
  21 class ResourceBuffer;
  22 class ResourceContext;
  23 class ResourceDispatcherHostImpl;
  24 class ResourceMessageFilter;
  25 class SharedIOBuffer;
  26
  27 // Used to complete an asynchronous resource request in response to resource
  28 // load events from the resource dispatcher host.
  29 class AsyncResourceHandler : public ResourceHandler,
  30                              public ResourceMessageDelegate {
  31  public:
  32   AsyncResourceHandler(net::URLRequest* request,
  33                        ResourceDispatcherHostImpl* rdh);
  34   ~AsyncResourceHandler() override;
  35
  36   bool OnMessageReceived(const IPC::Message& message) override;
  37
  38   // ResourceHandler implementation:
  39   bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
  40                            ResourceResponse* response,
  41                            bool* defer) override;
  42   bool OnResponseStarted(ResourceResponse* response, bool* defer) override;
  43   bool OnWillStart(const GURL& url, bool* defer) override;
  44   bool OnBeforeNetworkStart(const GURL& url, bool* defer) override;
  45   bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
  46                   int* buf_size,
  47                   int min_size) override;
  48   bool OnReadCompleted(int bytes_read, bool* defer) override;
  49   void OnResponseCompleted(const net::URLRequestStatus& status,
  50                            const std::string& security_info,
  51                            bool* defer) override;
  52   void OnDataDownloaded(int bytes_downloaded) override;
  53
  54  private:
  55   // IPC message handlers:
  56   void OnFollowRedirect(int request_id);
  57   void OnDataReceivedACK(int request_id);
  58   void OnUploadProgressACK(int request_id);
  59
  60   void ReportUploadProgress();
  61
  62   bool EnsureResourceBufferIsInitialized();
  63   void ResumeIfDeferred();
  64   void OnDefer();
  65
  66   scoped_refptr<ResourceBuffer> buffer_;
  67   ResourceDispatcherHostImpl* rdh_;
  68
  69   // Number of messages we've sent to the renderer that we haven't gotten an
  70   // ACK for. This allows us to avoid having too many messages in flight.
  71   int pending_data_count_;
  72
  73   int allocation_size_;
  74
  75   bool did_defer_;
  76
  77   bool has_checked_for_sufficient_resources_;
  78   bool sent_received_response_msg_;
  79   bool sent_first_data_msg_;
  80
  81   uint64 last_upload_position_;
  82   bool waiting_for_upload_progress_ack_;
  83   base::TimeTicks last_upload_ticks_;
  84   base::RepeatingTimer<AsyncResourceHandler> progress_timer_;
  85
  86   int64_t reported_transfer_size_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(AsyncResourceHandler);
  89 };
  90
  91 }  // namespace content
  92
  93 #endif  // CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_