components/nacl/renderer/file_downloader.h

   1 // Copyright 2014 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 #include <string>
   6
   7 #include "base/callback.h"
   8 #include "base/files/file.h"
   9 #include "ppapi/c/private/ppb_nacl_private.h"
  10 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  11
  12 namespace blink {
  13 struct WebURLError;
  14 class WebURLLoader;
  15 class WebURLResponse;
  16 }
  17
  18 namespace nacl {
  19
  20 // Downloads a file and writes the contents to a specified file open for
  21 // writing.
  22 class FileDownloader : public blink::WebURLLoaderClient {
  23  public:
  24   enum Status {
  25     SUCCESS,
  26     ACCESS_DENIED,
  27     FAILED
  28   };
  29
  30   // Provides the FileDownloader status and the HTTP status code.
  31   typedef base::Callback<void(Status, base::File, int)> StatusCallback;
  32
  33   // Provides the bytes received so far, and the total bytes expected to be
  34   // received.
  35   typedef base::Callback<void(int64_t, int64_t)> ProgressCallback;
  36
  37   FileDownloader(scoped_ptr<blink::WebURLLoader> url_loader,
  38                  base::File file,
  39                  StatusCallback status_cb,
  40                  ProgressCallback progress_cb);
  41
  42   virtual ~FileDownloader();
  43
  44   void Load(const blink::WebURLRequest& request);
  45
  46  private:
  47   // WebURLLoaderClient implementation.
  48   virtual void didReceiveResponse(blink::WebURLLoader* loader,
  49                                   const blink::WebURLResponse& response);
  50   virtual void didReceiveData(blink::WebURLLoader* loader,
  51                               const char* data,
  52                               int data_length,
  53                               int encoded_data_length);
  54   virtual void didFinishLoading(blink::WebURLLoader* loader,
  55                                 double finish_time,
  56                                 int64_t total_encoded_data_length);
  57   virtual void didFail(blink::WebURLLoader* loader,
  58                        const blink::WebURLError& error);
  59
  60   scoped_ptr<blink::WebURLLoader> url_loader_;
  61   base::File file_;
  62   StatusCallback status_cb_;
  63   ProgressCallback progress_cb_;
  64   int http_status_code_;
  65   int64_t total_bytes_received_;
  66   int64_t total_bytes_to_be_received_;
  67   Status status_;
  68 };
  69
  70 }  // namespace nacl