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#include "content/browser/download/drag_download_util.h"
6
7#include <string>
8
9#include "base/bind.h"
10#include "base/file_util.h"
11#include "base/files/file_path.h"
12#include "base/memory/scoped_ptr.h"
13#include "base/strings/string_number_conversions.h"
14#include "base/strings/string_util.h"
15#include "base/strings/utf_string_conversions.h"
16#include "base/threading/thread_restrictions.h"
17#include "content/public/browser/browser_thread.h"
18#include "net/base/file_stream.h"
19#include "net/base/net_errors.h"
20#include "url/gurl.h"
21
22using net::FileStream;
23
24namespace content {
25
26bool ParseDownloadMetadata(const string16& metadata,
27                           string16* mime_type,
28                           base::FilePath* file_name,
29                           GURL* url) {
30  const char16 separator = L':';
31
32  size_t mime_type_end_pos = metadata.find(separator);
33  if (mime_type_end_pos == string16::npos)
34    return false;
35
36  size_t file_name_end_pos = metadata.find(separator, mime_type_end_pos + 1);
37  if (file_name_end_pos == string16::npos)
38    return false;
39
40  GURL parsed_url = GURL(metadata.substr(file_name_end_pos + 1));
41  if (!parsed_url.is_valid())
42    return false;
43
44  if (mime_type)
45    *mime_type = metadata.substr(0, mime_type_end_pos);
46  if (file_name) {
47    string16 file_name_str = metadata.substr(
48        mime_type_end_pos + 1, file_name_end_pos - mime_type_end_pos  - 1);
49#if defined(OS_WIN)
50    *file_name = base::FilePath(file_name_str);
51#else
52    *file_name = base::FilePath(UTF16ToUTF8(file_name_str));
53#endif
54  }
55  if (url)
56    *url = parsed_url;
57
58  return true;
59}
60
61FileStream* CreateFileStreamForDrop(base::FilePath* file_path,
62                                    net::NetLog* net_log) {
63  DCHECK(file_path && !file_path->empty());
64
65  scoped_ptr<FileStream> file_stream(new FileStream(net_log));
66  const int kMaxSeq = 99;
67  for (int seq = 0; seq <= kMaxSeq; seq++) {
68    base::FilePath new_file_path;
69    if (seq == 0) {
70      new_file_path = *file_path;
71    } else {
72#if defined(OS_WIN)
73      string16 suffix = ASCIIToUTF16("-") + base::IntToString16(seq);
74#else
75      std::string suffix = std::string("-") + base::IntToString(seq);
76#endif
77      new_file_path = file_path->InsertBeforeExtension(suffix);
78    }
79
80    // http://crbug.com/110709
81    base::ThreadRestrictions::ScopedAllowIO allow_io;
82
83    // Explicitly (and redundantly check) for file -- despite the fact that our
84    // open won't overwrite -- just to avoid log spew.
85    if (!base::PathExists(new_file_path) &&
86        file_stream->OpenSync(new_file_path, base::PLATFORM_FILE_CREATE |
87                              base::PLATFORM_FILE_WRITE) == net::OK) {
88      *file_path = new_file_path;
89      return file_stream.release();
90    }
91  }
92
93  return NULL;
94}
95
96PromiseFileFinalizer::PromiseFileFinalizer(
97    DragDownloadFile* drag_file_downloader)
98    : drag_file_downloader_(drag_file_downloader) {
99}
100
101void PromiseFileFinalizer::OnDownloadCompleted(
102    const base::FilePath& file_path) {
103  BrowserThread::PostTask(
104      BrowserThread::UI, FROM_HERE,
105      base::Bind(&PromiseFileFinalizer::Cleanup, this));
106}
107
108void PromiseFileFinalizer::OnDownloadAborted() {
109  BrowserThread::PostTask(
110      BrowserThread::UI, FROM_HERE,
111      base::Bind(&PromiseFileFinalizer::Cleanup, this));
112}
113
114PromiseFileFinalizer::~PromiseFileFinalizer() {}
115
116void PromiseFileFinalizer::Cleanup() {
117  if (drag_file_downloader_.get())
118    drag_file_downloader_ = NULL;
119}
120
121}  // namespace content
122