content/browser/download/save_file_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_DOWNLOAD_SAVE_FILE_RESOURCE_HANDLER_H_
   6 #define CONTENT_BROWSER_DOWNLOAD_SAVE_FILE_RESOURCE_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "content/browser/loader/resource_handler.h"
  12 #include "url/gurl.h"
  13
  14 namespace content {
  15 class SaveFileManager;
  16
  17 // Forwards data to the save thread.
  18 class SaveFileResourceHandler : public ResourceHandler {
  19  public:
  20   SaveFileResourceHandler(int render_process_host_id,
  21                           int render_view_id,
  22                           const GURL& url,
  23                           SaveFileManager* manager);
  24   virtual ~SaveFileResourceHandler();
  25
  26   // ResourceHandler Implementation:
  27   virtual bool OnUploadProgress(int request_id,
  28                                 uint64 position,
  29                                 uint64 size) OVERRIDE;
  30
  31   // Saves the redirected URL to final_url_, we need to use the original
  32   // URL to match original request.
  33   virtual bool OnRequestRedirected(int request_id,
  34                                    const GURL& url,
  35                                    ResourceResponse* response,
  36                                    bool* defer) OVERRIDE;
  37
  38   // Sends the download creation information to the download thread.
  39   virtual bool OnResponseStarted(int request_id,
  40                                  ResourceResponse* response,
  41                                  bool* defer) OVERRIDE;
  42
  43   // Pass-through implementation.
  44   virtual bool OnWillStart(int request_id,
  45                            const GURL& url,
  46                            bool* defer) OVERRIDE;
  47
  48   // Creates a new buffer, which will be handed to the download thread for file
  49   // writing and deletion.
  50   virtual bool OnWillRead(int request_id,
  51                           net::IOBuffer** buf,
  52                           int* buf_size,
  53                           int min_size) OVERRIDE;
  54
  55   // Passes the buffer to the download file writer.
  56   virtual bool OnReadCompleted(int request_id, int bytes_read,
  57                                bool* defer) OVERRIDE;
  58
  59   virtual bool OnResponseCompleted(int request_id,
  60                                    const net::URLRequestStatus& status,
  61                                    const std::string& security_info) OVERRIDE;
  62
  63   // N/A to this flavor of SaveFileResourceHandler.
  64   virtual void OnDataDownloaded(int request_id, int bytes_downloaded) OVERRIDE;
  65
  66   // If the content-length header is not present (or contains something other
  67   // than numbers), StringToInt64 returns 0, which indicates 'unknown size' and
  68   // is handled correctly by the SaveManager.
  69   void set_content_length(const std::string& content_length);
  70
  71   void set_content_disposition(const std::string& content_disposition) {
  72     content_disposition_ = content_disposition;
  73   }
  74
  75  private:
  76   int save_id_;
  77   int render_process_id_;
  78   int render_view_id_;
  79   scoped_refptr<net::IOBuffer> read_buffer_;
  80   std::string content_disposition_;
  81   GURL url_;
  82   GURL final_url_;
  83   int64 content_length_;
  84   SaveFileManager* save_manager_;
  85
  86   static const int kReadBufSize = 32768;  // bytes
  87
  88   DISALLOW_COPY_AND_ASSIGN(SaveFileResourceHandler);
  89 };
  90
  91 }  // namespace content
  92
  93 #endif  // CONTENT_BROWSER_DOWNLOAD_SAVE_FILE_RESOURCE_HANDLER_H_