chrome/browser/bitmap_fetcher/bitmap_fetcher.cc

   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 "chrome/browser/bitmap_fetcher/bitmap_fetcher.h"
   6
   7 #include "content/public/browser/browser_thread.h"
   8 #include "net/url_request/url_fetcher.h"
   9 #include "net/url_request/url_request_context_getter.h"
  10 #include "net/url_request/url_request_status.h"
  11
  12 namespace chrome {
  13
  14 BitmapFetcher::BitmapFetcher(const GURL& url, BitmapFetcherDelegate* delegate)
  15     : ImageRequest(content::BrowserThread::GetMessageLoopProxyForThread(
  16           content::BrowserThread::UI)),
  17       url_(url),
  18       delegate_(delegate) {
  19 }
  20
  21 BitmapFetcher::~BitmapFetcher() {
  22 }
  23
  24 void BitmapFetcher::Start(net::URLRequestContextGetter* request_context,
  25                           const std::string& referrer,
  26                           net::URLRequest::ReferrerPolicy referrer_policy,
  27                           int load_flags) {
  28   if (url_fetcher_ != NULL)
  29     return;
  30
  31   url_fetcher_.reset(net::URLFetcher::Create(url_, net::URLFetcher::GET, this));
  32   url_fetcher_->SetRequestContext(request_context);
  33   url_fetcher_->SetReferrer(referrer);
  34   url_fetcher_->SetReferrerPolicy(referrer_policy);
  35   url_fetcher_->SetLoadFlags(load_flags);
  36   url_fetcher_->Start();
  37 }
  38
  39 // Methods inherited from URLFetcherDelegate.
  40
  41 void BitmapFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
  42   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  43
  44   if (source->GetStatus().status() != net::URLRequestStatus::SUCCESS) {
  45     ReportFailure();
  46     return;
  47   }
  48
  49   std::string image_data;
  50   source->GetResponseAsString(&image_data);
  51
  52   // Call start to begin decoding.  The ImageDecoder will call OnImageDecoded
  53   // with the data when it is done.
  54   ImageDecoder::Start(this, image_data);
  55 }
  56
  57 void BitmapFetcher::OnURLFetchDownloadProgress(const net::URLFetcher* source,
  58                                                int64 current,
  59                                                int64 total) {
  60   // Do nothing here.
  61 }
  62
  63 // Methods inherited from ImageDecoder::ImageRequest.
  64
  65 void BitmapFetcher::OnImageDecoded(const SkBitmap& decoded_image) {
  66   // Report success.
  67   delegate_->OnFetchComplete(url_, &decoded_image);
  68 }
  69
  70 void BitmapFetcher::OnDecodeImageFailed() {
  71   ReportFailure();
  72 }
  73
  74 void BitmapFetcher::ReportFailure() {
  75   delegate_->OnFetchComplete(url_, NULL);
  76 }
  77
  78 }  // namespace chrome