sync/internal_api/attachments/fake_attachment_downloader.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 "sync/internal_api/public/attachments/fake_attachment_downloader.h"
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "sync/internal_api/public/attachments/attachment_util.h"
  10
  11 namespace syncer {
  12
  13 FakeAttachmentDownloader::FakeAttachmentDownloader() {
  14 }
  15
  16 FakeAttachmentDownloader::~FakeAttachmentDownloader() {
  17   DCHECK(CalledOnValidThread());
  18 }
  19
  20 void FakeAttachmentDownloader::DownloadAttachment(
  21     const AttachmentId& attachment_id,
  22     const DownloadCallback& callback) {
  23   DCHECK(CalledOnValidThread());
  24   // This is happy fake downloader, it always successfully downloads empty
  25   // attachment.
  26   scoped_refptr<base::RefCountedMemory> data(new base::RefCountedBytes());
  27   scoped_ptr<Attachment> attachment;
  28   const uint32_t crc32c = ComputeCrc32c(data);
  29   attachment.reset(
  30       new Attachment(Attachment::CreateFromParts(attachment_id, data, crc32c)));
  31   base::MessageLoop::current()->PostTask(
  32       FROM_HERE,
  33       base::Bind(callback, DOWNLOAD_SUCCESS, base::Passed(&attachment)));
  34 }
  35
  36 }  // namespace syncer