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 "content/browser/loader/temporary_file_stream.h"
6
7#include "base/bind.h"
8#include "base/callback.h"
9#include "base/files/file_proxy.h"
10#include "base/memory/ref_counted.h"
11#include "content/public/browser/browser_thread.h"
12#include "net/base/file_stream.h"
13#include "storage/common/blob/shareable_file_reference.h"
14
15using storage::ShareableFileReference;
16
17namespace content {
18
19namespace {
20
21void DidCreateTemporaryFile(
22    const CreateTemporaryFileStreamCallback& callback,
23    scoped_ptr<base::FileProxy> file_proxy,
24    base::File::Error error_code,
25    const base::FilePath& file_path) {
26  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
27
28  if (!file_proxy->IsValid()) {
29    callback.Run(error_code, scoped_ptr<net::FileStream>(), NULL);
30    return;
31  }
32
33  scoped_refptr<base::TaskRunner> task_runner =
34      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE);
35
36  // Cancelled or not, create the deletable_file so the temporary is cleaned up.
37  scoped_refptr<ShareableFileReference> deletable_file =
38      ShareableFileReference::GetOrCreate(
39          file_path,
40          ShareableFileReference::DELETE_ON_FINAL_RELEASE,
41          task_runner.get());
42
43  scoped_ptr<net::FileStream> file_stream(
44      new net::FileStream(file_proxy->TakeFile(), task_runner));
45
46  callback.Run(error_code, file_stream.Pass(), deletable_file.get());
47}
48
49}  // namespace
50
51void CreateTemporaryFileStream(
52    const CreateTemporaryFileStreamCallback& callback) {
53  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
54
55  scoped_ptr<base::FileProxy> file_proxy(new base::FileProxy(
56      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE).get()));
57  base::FileProxy* proxy = file_proxy.get();
58  proxy->CreateTemporary(
59      base::File::FLAG_ASYNC,
60      base::Bind(&DidCreateTemporaryFile, callback, Passed(&file_proxy)));
61}
62
63}  // namespace content
64