1// Copyright (c) 2011 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/download/drag_download_util.h"
6
7#include "base/string_util.h"
8#include "base/file_path.h"
9#include "base/file_util.h"
10#include "base/memory/scoped_ptr.h"
11#include "base/task.h"
12#include "base/string_number_conversions.h"
13#include "base/utf_string_conversions.h"
14#include "content/browser/browser_thread.h"
15#include "googleurl/src/gurl.h"
16#include "net/base/file_stream.h"
17#include "net/base/net_errors.h"
18
19using net::FileStream;
20
21namespace drag_download_util {
22
23bool ParseDownloadMetadata(const string16& metadata,
24                           string16* mime_type,
25                           FilePath* file_name,
26                           GURL* url) {
27  const char16 separator = L':';
28
29  size_t mime_type_end_pos = metadata.find(separator);
30  if (mime_type_end_pos == string16::npos)
31    return false;
32
33  size_t file_name_end_pos = metadata.find(separator, mime_type_end_pos + 1);
34  if (file_name_end_pos == string16::npos)
35    return false;
36
37  GURL parsed_url = GURL(metadata.substr(file_name_end_pos + 1));
38  if (!parsed_url.is_valid())
39    return false;
40
41  if (mime_type)
42    *mime_type = metadata.substr(0, mime_type_end_pos);
43  if (file_name) {
44    string16 file_name_str = metadata.substr(
45        mime_type_end_pos + 1, file_name_end_pos - mime_type_end_pos  - 1);
46#if defined(OS_WIN)
47    *file_name = FilePath(file_name_str);
48#else
49    *file_name = FilePath(UTF16ToUTF8(file_name_str));
50#endif
51  }
52  if (url)
53    *url = parsed_url;
54
55  return true;
56}
57
58FileStream* CreateFileStreamForDrop(FilePath* file_path) {
59  DCHECK(file_path && !file_path->empty());
60
61  scoped_ptr<FileStream> file_stream(new FileStream);
62  const int kMaxSeq = 99;
63  for (int seq = 0; seq <= kMaxSeq; seq++) {
64    FilePath new_file_path;
65    if (seq == 0) {
66      new_file_path = *file_path;
67    } else {
68 #if defined(OS_WIN)
69      string16 suffix = ASCIIToUTF16("-") + base::IntToString16(seq);
70 #else
71      std::string suffix = std::string("-") + base::IntToString(seq);
72 #endif
73      new_file_path = file_path->InsertBeforeExtension(suffix);
74    }
75
76    // Explicitly (and redundantly check) for file -- despite the fact that our
77    // open won't overwrite -- just to avoid log spew.
78    if (!file_util::PathExists(new_file_path) &&
79        file_stream->Open(new_file_path, base::PLATFORM_FILE_CREATE |
80                              base::PLATFORM_FILE_WRITE) == net::OK) {
81      *file_path = new_file_path;
82      return file_stream.release();
83    }
84  }
85
86  return NULL;
87}
88
89PromiseFileFinalizer::PromiseFileFinalizer(
90    DragDownloadFile* drag_file_downloader)
91    : drag_file_downloader_(drag_file_downloader) {
92}
93
94PromiseFileFinalizer::~PromiseFileFinalizer() {}
95
96void PromiseFileFinalizer::Cleanup() {
97  if (drag_file_downloader_.get())
98    drag_file_downloader_ = NULL;
99}
100
101void PromiseFileFinalizer::OnDownloadCompleted(const FilePath& file_path) {
102  BrowserThread::PostTask(
103      BrowserThread::UI, FROM_HERE,
104      NewRunnableMethod(this, &PromiseFileFinalizer::Cleanup));
105}
106
107void PromiseFileFinalizer::OnDownloadAborted() {
108  BrowserThread::PostTask(
109      BrowserThread::UI, FROM_HERE,
110      NewRunnableMethod(this, &PromiseFileFinalizer::Cleanup));
111}
112
113}  // namespace drag_download_util
114