media_file_system_backend.cc revision e5d81f57cb97b3b6b7fccc9c5610d21eb81db09d 
1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org// Copyright (c) 2013 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/media_galleries/fileapi/media_file_system_backend.h"
6
7#include <string>
8
9#include "base/bind.h"
10#include "base/files/file_path.h"
11#include "base/logging.h"
12#include "base/message_loop/message_loop_proxy.h"
13#include "base/platform_file.h"
14#include "base/sequenced_task_runner.h"
15#include "base/strings/string_number_conversions.h"
16#include "base/strings/string_util.h"
17#include "base/strings/utf_string_conversions.h"
18#include "base/threading/sequenced_worker_pool.h"
19#include "chrome/browser/browser_process.h"
20#include "chrome/browser/extensions/extension_service.h"
21#include "chrome/browser/media_galleries/fileapi/device_media_async_file_util.h"
22#include "chrome/browser/media_galleries/fileapi/media_file_validator_factory.h"
23#include "chrome/browser/media_galleries/fileapi/media_path_filter.h"
24#include "chrome/browser/media_galleries/fileapi/native_media_file_util.h"
25#include "chrome/browser/media_galleries/media_file_system_registry.h"
26#include "chrome/browser/profiles/profile.h"
27#include "content/public/browser/browser_thread.h"
28#include "content/public/browser/render_process_host.h"
29#include "content/public/browser/render_view_host.h"
30#include "content/public/browser/resource_request_info.h"
31#include "extensions/browser/extension_system.h"
32#include "net/url_request/url_request.h"
33#include "webkit/browser/blob/file_stream_reader.h"
34#include "webkit/browser/fileapi/copy_or_move_file_validator.h"
35#include "webkit/browser/fileapi/file_stream_writer.h"
36#include "webkit/browser/fileapi/file_system_context.h"
37#include "webkit/browser/fileapi/file_system_operation.h"
38#include "webkit/browser/fileapi/file_system_operation_context.h"
39#include "webkit/browser/fileapi/file_system_url.h"
40#include "webkit/browser/fileapi/native_file_util.h"
41#include "webkit/common/fileapi/file_system_types.h"
42#include "webkit/common/fileapi/file_system_util.h"
43
44#if defined(OS_WIN) || defined(OS_MACOSX)
45#include "chrome/browser/media_galleries/fileapi/itunes_file_util.h"
46#include "chrome/browser/media_galleries/fileapi/picasa_file_util.h"
47#endif  // defined(OS_WIN) || defined(OS_MACOSX)
48
49#if defined(OS_MACOSX)
50#include "chrome/browser/media_galleries/fileapi/iphoto_file_util.h"
51#endif  // defined(OS_MACOSX)
52
53using fileapi::FileSystemContext;
54using fileapi::FileSystemURL;
55
56namespace {
57
58const char kMediaGalleryMountPrefix[] = "media_galleries-";
59
60void OnPreferencesInit(
61    const content::RenderViewHost* rvh,
62    const extensions::Extension* extension,
63    MediaGalleryPrefId pref_id,
64    const base::Callback<void(base::File::Error result)>& callback) {
65  MediaFileSystemRegistry* registry =
66      g_browser_process->media_file_system_registry();
67  registry->RegisterMediaFileSystemForExtension(rvh, extension, pref_id,
68                                                callback);
69}
70
71void AttemptAutoMountOnUIThread(
72    int32 process_id,
73    int32 routing_id,
74    const std::string& storage_domain,
75    const std::string& mount_point,
76    const base::Callback<void(base::File::Error result)>& callback) {
77  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
78
79  content::RenderViewHost* rvh =
80      content::RenderViewHost::FromID(process_id, routing_id);
81  if (rvh) {
82    Profile* profile =
83        Profile::FromBrowserContext(rvh->GetProcess()->GetBrowserContext());
84
85    ExtensionService* extension_service =
86        extensions::ExtensionSystem::Get(profile)->extension_service();
87    const extensions::Extension* extension =
88        extension_service->GetExtensionById(storage_domain,
89                                            false /*include disabled*/);
90    std::string expected_mount_prefix =
91        MediaFileSystemBackend::ConstructMountName(
92            profile->GetPath(), storage_domain, kInvalidMediaGalleryPrefId);
93    MediaGalleryPrefId pref_id = kInvalidMediaGalleryPrefId;
94    if (extension &&
95        extension->id() == storage_domain &&
96        StartsWithASCII(mount_point, expected_mount_prefix, true) &&
97        base::StringToUint64(mount_point.substr(expected_mount_prefix.size()),
98                             &pref_id) &&
99        pref_id != kInvalidMediaGalleryPrefId) {
100      MediaGalleriesPreferences* preferences =
101          g_browser_process->media_file_system_registry()->GetPreferences(
102              profile);
103      preferences->EnsureInitialized(
104          base::Bind(&OnPreferencesInit, rvh, extension, pref_id, callback));
105      return;
106    }
107  }
108
109  content::BrowserThread::PostTask(
110      content::BrowserThread::IO,
111      FROM_HERE,
112      base::Bind(callback, base::File::FILE_ERROR_NOT_FOUND));
113}
114
115}  // namespace
116
117const char MediaFileSystemBackend::kMediaTaskRunnerName[] =
118    "media-task-runner";
119
120MediaFileSystemBackend::MediaFileSystemBackend(
121    const base::FilePath& profile_path,
122    base::SequencedTaskRunner* media_task_runner)
123    : profile_path_(profile_path),
124      media_task_runner_(media_task_runner),
125      media_path_filter_(new MediaPathFilter),
126      media_copy_or_move_file_validator_factory_(new MediaFileValidatorFactory),
127      native_media_file_util_(
128          new NativeMediaFileUtil(media_path_filter_.get())),
129      device_media_async_file_util_(
130          DeviceMediaAsyncFileUtil::Create(profile_path_))
131#if defined(OS_WIN) || defined(OS_MACOSX)
132      ,
133      picasa_file_util_(new picasa::PicasaFileUtil(media_path_filter_.get())),
134      itunes_file_util_(new itunes::ITunesFileUtil(media_path_filter_.get()))
135#endif  // defined(OS_WIN) || defined(OS_MACOSX)
136#if defined(OS_MACOSX)
137      ,
138      iphoto_file_util_(new iphoto::IPhotoFileUtil(media_path_filter_.get()))
139#endif  // defined(OS_MACOSX)
140{
141}
142
143MediaFileSystemBackend::~MediaFileSystemBackend() {
144}
145
146// static
147bool MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread() {
148  base::SequencedWorkerPool* pool = content::BrowserThread::GetBlockingPool();
149  base::SequencedWorkerPool::SequenceToken media_sequence_token =
150      pool->GetNamedSequenceToken(kMediaTaskRunnerName);
151  return pool->IsRunningSequenceOnCurrentThread(media_sequence_token);
152}
153
154// static
155scoped_refptr<base::SequencedTaskRunner>
156MediaFileSystemBackend::MediaTaskRunner() {
157  base::SequencedWorkerPool* pool = content::BrowserThread::GetBlockingPool();
158  base::SequencedWorkerPool::SequenceToken media_sequence_token =
159      pool->GetNamedSequenceToken(kMediaTaskRunnerName);
160  return pool->GetSequencedTaskRunner(media_sequence_token);
161}
162
163// static
164std::string MediaFileSystemBackend::ConstructMountName(
165    const base::FilePath& profile_path,
166    const std::string& extension_id,
167    MediaGalleryPrefId pref_id) {
168  std::string name(kMediaGalleryMountPrefix);
169  name.append(profile_path.BaseName().MaybeAsASCII());
170  name.append("-");
171  name.append(extension_id);
172  name.append("-");
173  if (pref_id != kInvalidMediaGalleryPrefId)
174    name.append(base::Uint64ToString(pref_id));
175  base::ReplaceChars(name, " /", "_", &name);
176  return name;
177}
178
179// static
180bool MediaFileSystemBackend::AttemptAutoMountForURLRequest(
181    const net::URLRequest* url_request,
182    const fileapi::FileSystemURL& filesystem_url,
183    const std::string& storage_domain,
184    const base::Callback<void(base::File::Error result)>& callback) {
185  if (storage_domain.empty() ||
186      filesystem_url.type() != fileapi::kFileSystemTypeExternal ||
187      storage_domain != filesystem_url.origin().host()) {
188    return false;
189  }
190
191  const base::FilePath& virtual_path = filesystem_url.path();
192  if (virtual_path.ReferencesParent())
193    return false;
194  std::vector<base::FilePath::StringType> components;
195  virtual_path.GetComponents(&components);
196  if (components.empty())
197    return false;
198  std::string mount_point = base::FilePath(components[0]).AsUTF8Unsafe();
199  if (!StartsWithASCII(mount_point, kMediaGalleryMountPrefix, true))
200    return false;
201
202  const content::ResourceRequestInfo* request_info =
203      content::ResourceRequestInfo::ForRequest(url_request);
204  if (!request_info)
205    return false;
206
207  content::BrowserThread::PostTask(
208      content::BrowserThread::UI,
209      FROM_HERE,
210      base::Bind(&AttemptAutoMountOnUIThread, request_info->GetChildID(),
211                 request_info->GetRouteID(), storage_domain, mount_point,
212                 callback));
213  return true;
214}
215
216bool MediaFileSystemBackend::CanHandleType(
217    fileapi::FileSystemType type) const {
218  switch (type) {
219    case fileapi::kFileSystemTypeNativeMedia:
220    case fileapi::kFileSystemTypeDeviceMedia:
221#if defined(OS_WIN) || defined(OS_MACOSX)
222    case fileapi::kFileSystemTypePicasa:
223    case fileapi::kFileSystemTypeItunes:
224#endif  // defined(OS_WIN) || defined(OS_MACOSX)
225#if defined(OS_MACOSX)
226    case fileapi::kFileSystemTypeIphoto:
227#endif  // defined(OS_MACOSX)
228      return true;
229    default:
230      return false;
231  }
232}
233
234void MediaFileSystemBackend::Initialize(fileapi::FileSystemContext* context) {
235}
236
237void MediaFileSystemBackend::ResolveURL(
238    const FileSystemURL& url,
239    fileapi::OpenFileSystemMode mode,
240    const OpenFileSystemCallback& callback) {
241  // We never allow opening a new FileSystem via usual ResolveURL.
242  base::MessageLoopProxy::current()->PostTask(
243      FROM_HERE,
244      base::Bind(callback,
245                 GURL(),
246                 std::string(),
247                 base::File::FILE_ERROR_SECURITY));
248}
249
250fileapi::AsyncFileUtil* MediaFileSystemBackend::GetAsyncFileUtil(
251    fileapi::FileSystemType type) {
252  switch (type) {
253    case fileapi::kFileSystemTypeNativeMedia:
254      return native_media_file_util_.get();
255    case fileapi::kFileSystemTypeDeviceMedia:
256      return device_media_async_file_util_.get();
257#if defined(OS_WIN) || defined(OS_MACOSX)
258    case fileapi::kFileSystemTypeItunes:
259      return itunes_file_util_.get();
260    case fileapi::kFileSystemTypePicasa:
261      return picasa_file_util_.get();
262#endif  // defined(OS_WIN) || defined(OS_MACOSX)
263#if defined(OS_MACOSX)
264    case fileapi::kFileSystemTypeIphoto:
265      return iphoto_file_util_.get();
266#endif  // defined(OS_MACOSX)
267    default:
268      NOTREACHED();
269  }
270  return NULL;
271}
272
273fileapi::CopyOrMoveFileValidatorFactory*
274MediaFileSystemBackend::GetCopyOrMoveFileValidatorFactory(
275    fileapi::FileSystemType type, base::File::Error* error_code) {
276  DCHECK(error_code);
277  *error_code = base::File::FILE_OK;
278  switch (type) {
279    case fileapi::kFileSystemTypeNativeMedia:
280    case fileapi::kFileSystemTypeDeviceMedia:
281    case fileapi::kFileSystemTypeIphoto:
282    case fileapi::kFileSystemTypeItunes:
283      if (!media_copy_or_move_file_validator_factory_) {
284        *error_code = base::File::FILE_ERROR_SECURITY;
285        return NULL;
286      }
287      return media_copy_or_move_file_validator_factory_.get();
288    default:
289      NOTREACHED();
290  }
291  return NULL;
292}
293
294fileapi::FileSystemOperation*
295MediaFileSystemBackend::CreateFileSystemOperation(
296    const FileSystemURL& url,
297    FileSystemContext* context,
298    base::File::Error* error_code) const {
299  scoped_ptr<fileapi::FileSystemOperationContext> operation_context(
300      new fileapi::FileSystemOperationContext(
301          context, media_task_runner_.get()));
302  return fileapi::FileSystemOperation::Create(
303      url, context, operation_context.Pass());
304}
305
306bool MediaFileSystemBackend::SupportsStreaming(
307    const fileapi::FileSystemURL& url) const {
308  if (url.type() == fileapi::kFileSystemTypeDeviceMedia) {
309    DCHECK(device_media_async_file_util_);
310    return device_media_async_file_util_->SupportsStreaming(url);
311  }
312
313  return false;
314}
315
316scoped_ptr<webkit_blob::FileStreamReader>
317MediaFileSystemBackend::CreateFileStreamReader(
318    const FileSystemURL& url,
319    int64 offset,
320    const base::Time& expected_modification_time,
321    FileSystemContext* context) const {
322  if (url.type() == fileapi::kFileSystemTypeDeviceMedia) {
323    DCHECK(device_media_async_file_util_);
324    scoped_ptr<webkit_blob::FileStreamReader> reader =
325        device_media_async_file_util_->GetFileStreamReader(
326            url, offset, expected_modification_time, context);
327    DCHECK(reader);
328    return reader.Pass();
329  }
330
331  return scoped_ptr<webkit_blob::FileStreamReader>(
332      webkit_blob::FileStreamReader::CreateForLocalFile(
333          context->default_file_task_runner(),
334          url.path(), offset, expected_modification_time));
335}
336
337scoped_ptr<fileapi::FileStreamWriter>
338MediaFileSystemBackend::CreateFileStreamWriter(
339    const FileSystemURL& url,
340    int64 offset,
341    FileSystemContext* context) const {
342  return scoped_ptr<fileapi::FileStreamWriter>(
343      fileapi::FileStreamWriter::CreateForLocalFile(
344          context->default_file_task_runner(),
345          url.path(),
346          offset,
347          fileapi::FileStreamWriter::OPEN_EXISTING_FILE));
348}
349
350fileapi::FileSystemQuotaUtil*
351MediaFileSystemBackend::GetQuotaUtil() {
352  // No quota support.
353  return NULL;
354}
355