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_frame_id,
  27                           const GURL& url,
  28                           SaveFileManager* manager);
  29   ~SaveFileResourceHandler() override;
  30
  31   // ResourceHandler Implementation:
  32
  33   // Saves the redirected URL to final_url_, we need to use the original
  34   // URL to match original request.
  35   bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
  36                            ResourceResponse* response,
  37                            bool* defer) override;
  38
  39   // Sends the download creation information to the download thread.
  40   bool OnResponseStarted(ResourceResponse* response, bool* defer) override;
  41
  42   // Pass-through implementation.
  43   bool OnWillStart(const GURL& url, bool* defer) override;
  44
  45   // Pass-through implementation.
  46   bool OnBeforeNetworkStart(const GURL& url, bool* defer) override;
  47
  48   // Creates a new buffer, which will be handed to the download thread for file
  49   // writing and deletion.
  50   bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
  51                   int* buf_size,
  52                   int min_size) override;
  53
  54   // Passes the buffer to the download file writer.
  55   bool OnReadCompleted(int bytes_read, bool* defer) override;
  56
  57   void OnResponseCompleted(const net::URLRequestStatus& status,
  58                            const std::string& security_info,
  59                            bool* defer) override;
  60
  61   // N/A to this flavor of SaveFileResourceHandler.
  62   void OnDataDownloaded(int bytes_downloaded) override;
  63
  64   // If the content-length header is not present (or contains something other
  65   // than numbers), StringToInt64 returns 0, which indicates 'unknown size' and
  66   // is handled correctly by the SaveManager.
  67   void set_content_length(const std::string& content_length);
  68
  69   void set_content_disposition(const std::string& content_disposition) {
  70     content_disposition_ = content_disposition;
  71   }
  72
  73  private:
  74   int save_id_;
  75   int render_process_id_;
  76   int render_frame_id_;
  77   scoped_refptr<net::IOBuffer> read_buffer_;
  78   std::string content_disposition_;
  79   GURL url_;
  80   GURL final_url_;
  81   int64 content_length_;
  82   SaveFileManager* save_manager_;
  83
  84   static const int kReadBufSize = 32768;  // bytes
  85
  86   DISALLOW_COPY_AND_ASSIGN(SaveFileResourceHandler);
  87 };
  88
  89 }  // namespace content
  90
  91 #endif  // CONTENT_BROWSER_DOWNLOAD_SAVE_FILE_RESOURCE_HANDLER_H_