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 CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_ 6 #define CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_ 7 #pragma once 8 9 #include <string> 10 11 #include "base/memory/scoped_ptr.h" 12 #include "base/timer.h" 13 #include "chrome/browser/download/download_file.h" 14 #include "content/browser/renderer_host/global_request_id.h" 15 #include "content/browser/renderer_host/resource_handler.h" 16 17 class DownloadFileManager; 18 class ResourceDispatcherHost; 19 struct DownloadBuffer; 20 21 namespace net { 22 class URLRequest; 23 } // namespace net 24 25 // Forwards data to the download thread. 26 class DownloadResourceHandler : public ResourceHandler { 27 public: 28 DownloadResourceHandler(ResourceDispatcherHost* rdh, 29 int render_process_host_id, 30 int render_view_id, 31 int request_id, 32 const GURL& url, 33 DownloadFileManager* download_file_manager, 34 net::URLRequest* request, 35 bool save_as, 36 const DownloadSaveInfo& save_info); 37 38 virtual bool OnUploadProgress(int request_id, uint64 position, uint64 size); 39 40 // Not needed, as this event handler ought to be the final resource. 41 virtual bool OnRequestRedirected(int request_id, const GURL& url, 42 ResourceResponse* response, bool* defer); 43 44 // Send the download creation information to the download thread. 45 virtual bool OnResponseStarted(int request_id, ResourceResponse* response); 46 47 // Pass-through implementation. 48 virtual bool OnWillStart(int request_id, const GURL& url, bool* defer); 49 50 // Create a new buffer, which will be handed to the download thread for file 51 // writing and deletion. 52 virtual bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size, 53 int min_size); 54 55 virtual bool OnReadCompleted(int request_id, int* bytes_read); 56 57 virtual bool OnResponseCompleted(int request_id, 58 const net::URLRequestStatus& status, 59 const std::string& security_info); 60 virtual void OnRequestClosed(); 61 62 // If the content-length header is not present (or contains something other 63 // than numbers), the incoming content_length is -1 (unknown size). 64 // Set the content length to 0 to indicate unknown size to DownloadManager. 65 void set_content_length(const int64& content_length); 66 67 void set_content_disposition(const std::string& content_disposition); 68 69 void CheckWriteProgress(); 70 71 std::string DebugString() const; 72 73 private: 74 ~DownloadResourceHandler(); 75 76 void StartPauseTimer(); 77 78 int download_id_; 79 GlobalRequestID global_id_; 80 int render_view_id_; 81 scoped_refptr<net::IOBuffer> read_buffer_; 82 std::string content_disposition_; 83 int64 content_length_; 84 DownloadFileManager* download_file_manager_; 85 net::URLRequest* request_; 86 bool save_as_; // Request was initiated via "Save As" by the user. 87 DownloadSaveInfo save_info_; 88 scoped_ptr<DownloadBuffer> buffer_; 89 ResourceDispatcherHost* rdh_; 90 bool is_paused_; 91 base::OneShotTimer<DownloadResourceHandler> pause_timer_; 92 base::TimeTicks download_start_time_; // used to collect stats. 93 static const int kReadBufSize = 32768; // bytes 94 static const size_t kLoadsToWrite = 100; // number of data buffers queued 95 static const int kThrottleTimeMs = 200; // milliseconds 96 97 DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler); 98 }; 99 100 #endif // CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_ 101