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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 #ifndef WEBKIT_BROWSER_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_ | |
6 #define WEBKIT_BROWSER_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_ | |
7 | |
8 #include <map> | |
9 #include <string> | |
10 #include <vector> | |
11 | |
12 #include "base/compiler_specific.h" | |
13 #include "base/files/file_path.h" | |
14 #include "base/memory/scoped_ptr.h" | |
15 #include "base/synchronization/lock.h" | |
16 #include "webkit/browser/fileapi/file_system_mount_point_provider.h" | |
17 #include "webkit/browser/quota/special_storage_policy.h" | |
18 #include "webkit/browser/webkit_storage_browser_export.h" | |
19 #include "webkit/common/fileapi/file_system_types.h" | |
20 | |
21 namespace fileapi { | |
22 class AsyncFileUtilAdapter; | |
23 class CopyOrMoveFileValidatorFactory; | |
24 class ExternalMountPoints; | |
25 class FileSystemFileUtil; | |
26 class FileSystemURL; | |
27 class IsolatedContext; | |
28 } | |
29 | |
30 namespace chromeos { | |
31 | |
32 class FileAccessPermissions; | |
33 | |
34 // CrosMountPointProvider is a Chrome OS specific implementation of | |
35 // ExternalFileSystemMountPointProvider. This class is responsible for a | |
36 // number of things, including: | |
37 // | |
38 // - Add system mount points | |
39 // - Grant/revoke/check file access permissions | |
40 // - Create FileSystemOperation per file system type | |
41 // - Create FileStreamReader/Writer per file system type | |
42 // | |
43 // Chrome OS specific mount points: | |
44 // | |
45 // "Downloads" is a mount point for user's Downloads directory on the local | |
46 // disk, where downloaded files are stored by default. | |
47 // | |
48 // "archive" is a mount point for an archive file, such as a zip file. This | |
49 // mount point exposes contents of an archive file via cros_disks and AVFS | |
50 // <http://avf.sourceforge.net/>. | |
51 // | |
52 // "removable" is a mount point for removable media such as an SD card. | |
53 // Insertion and removal of removable media are handled by cros_disks. | |
54 // | |
55 // "oem" is a read-only mount point for a directory containing OEM data. | |
56 // | |
57 // "drive" is a mount point for Google Drive. Drive is integrated with the | |
58 // FileSystem API layer via drive::FileSystemProxy. This mount point is added | |
59 // by drive::DriveIntegrationService. | |
60 // | |
61 // These mount points are placed under the "external" namespace, and file | |
62 // system URLs for these mount points look like: | |
63 // | |
64 // filesystem:<origin>/external/<mount_name>/... | |
65 // | |
66 class WEBKIT_STORAGE_BROWSER_EXPORT CrosMountPointProvider | |
67 : public fileapi::ExternalFileSystemMountPointProvider { | |
68 public: | |
69 using fileapi::FileSystemMountPointProvider::OpenFileSystemCallback; | |
70 using fileapi::FileSystemMountPointProvider::DeleteFileSystemCallback; | |
71 | |
72 // CrosMountPointProvider will take an ownership of a |mount_points| | |
73 // reference. On the other hand, |system_mount_points| will be kept as a raw | |
74 // pointer and it should outlive CrosMountPointProvider instance. | |
75 CrosMountPointProvider( | |
76 scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy, | |
77 scoped_refptr<fileapi::ExternalMountPoints> mount_points, | |
78 fileapi::ExternalMountPoints* system_mount_points); | |
79 virtual ~CrosMountPointProvider(); | |
80 | |
81 // Adds system mount points, such as "archive", and "removable". This | |
82 // function is no-op if these mount points are already present. | |
83 void AddSystemMountPoints(); | |
84 | |
85 // Returns true if CrosMountpointProvider can handle |url|, i.e. its | |
86 // file system type matches with what this provider supports. | |
87 // This could be called on any threads. | |
88 static bool CanHandleURL(const fileapi::FileSystemURL& url); | |
89 | |
90 // fileapi::FileSystemMountPointProvider overrides. | |
91 virtual bool CanHandleType(fileapi::FileSystemType type) const OVERRIDE; | |
92 virtual void OpenFileSystem( | |
93 const GURL& origin_url, | |
94 fileapi::FileSystemType type, | |
95 fileapi::OpenFileSystemMode mode, | |
96 const OpenFileSystemCallback& callback) OVERRIDE; | |
97 virtual fileapi::FileSystemFileUtil* GetFileUtil( | |
98 fileapi::FileSystemType type) OVERRIDE; | |
99 virtual fileapi::AsyncFileUtil* GetAsyncFileUtil( | |
100 fileapi::FileSystemType type) OVERRIDE; | |
101 virtual fileapi::CopyOrMoveFileValidatorFactory* | |
102 GetCopyOrMoveFileValidatorFactory( | |
103 fileapi::FileSystemType type, | |
104 base::PlatformFileError* error_code) OVERRIDE; | |
105 virtual fileapi::FilePermissionPolicy GetPermissionPolicy( | |
106 const fileapi::FileSystemURL& url, | |
107 int permissions) const OVERRIDE; | |
108 virtual fileapi::FileSystemOperation* CreateFileSystemOperation( | |
109 const fileapi::FileSystemURL& url, | |
110 fileapi::FileSystemContext* context, | |
111 base::PlatformFileError* error_code) const OVERRIDE; | |
112 virtual scoped_ptr<webkit_blob::FileStreamReader> CreateFileStreamReader( | |
113 const fileapi::FileSystemURL& path, | |
114 int64 offset, | |
115 const base::Time& expected_modification_time, | |
116 fileapi::FileSystemContext* context) const OVERRIDE; | |
117 virtual scoped_ptr<fileapi::FileStreamWriter> CreateFileStreamWriter( | |
118 const fileapi::FileSystemURL& url, | |
119 int64 offset, | |
120 fileapi::FileSystemContext* context) const OVERRIDE; | |
121 virtual fileapi::FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE; | |
122 virtual void DeleteFileSystem( | |
123 const GURL& origin_url, | |
124 fileapi::FileSystemType type, | |
125 fileapi::FileSystemContext* context, | |
126 const DeleteFileSystemCallback& callback) OVERRIDE; | |
127 | |
128 // fileapi::ExternalFileSystemMountPointProvider overrides. | |
129 virtual bool IsAccessAllowed(const fileapi::FileSystemURL& url) | |
130 const OVERRIDE; | |
131 virtual std::vector<base::FilePath> GetRootDirectories() const OVERRIDE; | |
132 virtual void GrantFullAccessToExtension( | |
133 const std::string& extension_id) OVERRIDE; | |
134 virtual void GrantFileAccessToExtension( | |
135 const std::string& extension_id, | |
136 const base::FilePath& virtual_path) OVERRIDE; | |
137 virtual void RevokeAccessForExtension( | |
138 const std::string& extension_id) OVERRIDE; | |
139 virtual bool GetVirtualPath(const base::FilePath& filesystem_path, | |
140 base::FilePath* virtual_path) OVERRIDE; | |
141 | |
142 private: | |
143 fileapi::RemoteFileSystemProxyInterface* GetRemoteProxy( | |
144 const std::string& mount_name) const; | |
145 base::FilePath GetFileSystemRootPath(const fileapi::FileSystemURL& url) const; | |
146 | |
147 scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_; | |
148 scoped_ptr<FileAccessPermissions> file_access_permissions_; | |
149 scoped_ptr<fileapi::AsyncFileUtilAdapter> local_file_util_; | |
150 | |
151 // Mount points specific to the owning context (i.e. per-profile mount | |
152 // points). | |
153 // | |
154 // It is legal to have mount points with the same name as in | |
155 // system_mount_points_. Also, mount point paths may overlap with mount point | |
156 // paths in system_mount_points_. In both cases mount points in | |
157 // |mount_points_| will have a priority. | |
158 // E.g. if |mount_points_| map 'foo1' to '/foo/foo1' and | |
159 // |file_system_mount_points_| map 'xxx' to '/foo/foo1/xxx', |GetVirtualPaths| | |
160 // will resolve '/foo/foo1/xxx/yyy' as 'foo1/xxx/yyy' (i.e. the mapping from | |
161 // |mount_points_| will be used). | |
162 scoped_refptr<fileapi::ExternalMountPoints> mount_points_; | |
163 | |
164 // Globally visible mount points. System MountPonts instance should outlive | |
165 // all CrosMountPointProvider instances, so raw pointer is safe. | |
166 fileapi::ExternalMountPoints* system_mount_points_; | |
167 | |
168 DISALLOW_COPY_AND_ASSIGN(CrosMountPointProvider); | |
169 }; | |
170 | |
171 } // namespace chromeos | |
172 | |
173 #endif // WEBKIT_BROWSER_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_ | |
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