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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 
19 using net::FileStream;
20 
21 namespace drag_download_util {
22 
ParseDownloadMetadata(const string16 & metadata,string16 * mime_type,FilePath * file_name,GURL * url)23 bool 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 
CreateFileStreamForDrop(FilePath * file_path)58 FileStream* 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 
PromiseFileFinalizer(DragDownloadFile * drag_file_downloader)89 PromiseFileFinalizer::PromiseFileFinalizer(
90     DragDownloadFile* drag_file_downloader)
91     : drag_file_downloader_(drag_file_downloader) {
92 }
93 
~PromiseFileFinalizer()94 PromiseFileFinalizer::~PromiseFileFinalizer() {}
95 
Cleanup()96 void PromiseFileFinalizer::Cleanup() {
97   if (drag_file_downloader_.get())
98     drag_file_downloader_ = NULL;
99 }
100 
OnDownloadCompleted(const FilePath & file_path)101 void PromiseFileFinalizer::OnDownloadCompleted(const FilePath& file_path) {
102   BrowserThread::PostTask(
103       BrowserThread::UI, FROM_HERE,
104       NewRunnableMethod(this, &PromiseFileFinalizer::Cleanup));
105 }
106 
OnDownloadAborted()107 void PromiseFileFinalizer::OnDownloadAborted() {
108   BrowserThread::PostTask(
109       BrowserThread::UI, FROM_HERE,
110       NewRunnableMethod(this, &PromiseFileFinalizer::Cleanup));
111 }
112 
113 }  // namespace drag_download_util
114