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 net {
  15 class URLRequest;
  16 }
  17
  18 namespace content {
  19 class SaveFileManager;
  20
  21 // Forwards data to the save thread.
  22 class SaveFileResourceHandler : public ResourceHandler {
  23  public:
  24   SaveFileResourceHandler(net::URLRequest* request,
  25                           int render_process_host_id,
  26                           int render_view_id,
  27                           const GURL& url,
  28                           SaveFileManager* manager);
  29   virtual ~SaveFileResourceHandler();
  30
  31   // ResourceHandler Implementation:
  32   virtual bool OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
  33
  34   // Saves the redirected URL to final_url_, we need to use the original
  35   // URL to match original request.
  36   virtual bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
  37                                    ResourceResponse* response,
  38                                    bool* defer) OVERRIDE;
  39
  40   // Sends the download creation information to the download thread.
  41   virtual bool OnResponseStarted(ResourceResponse* response,
  42                                  bool* defer) OVERRIDE;
  43
  44   // Pass-through implementation.
  45   virtual bool OnWillStart(const GURL& url, bool* defer) OVERRIDE;
  46
  47   // Pass-through implementation.
  48   virtual bool OnBeforeNetworkStart(const GURL& url, bool* defer) OVERRIDE;
  49
  50   // Creates a new buffer, which will be handed to the download thread for file
  51   // writing and deletion.
  52   virtual bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
  53                           int* buf_size,
  54                           int min_size) OVERRIDE;
  55
  56   // Passes the buffer to the download file writer.
  57   virtual bool OnReadCompleted(int bytes_read, bool* defer) OVERRIDE;
  58
  59   virtual void OnResponseCompleted(const net::URLRequestStatus& status,
  60                                    const std::string& security_info,
  61                                    bool* defer) OVERRIDE;
  62
  63   // N/A to this flavor of SaveFileResourceHandler.
  64   virtual void OnDataDownloaded(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_