1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/chromeos/fileapi/cros_mount_point_provider.h"
#include "base/logging.h"
#include "base/memory/scoped_callback_factory.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/message_loop_proxy.h"
#include "base/stringprintf.h"
#include "base/utf_string_conversions.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFileSystem.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
#include "webkit/chromeos/fileapi/file_access_permissions.h"
#include "webkit/fileapi/file_system_path_manager.h"
#include "webkit/fileapi/file_system_util.h"
#include "webkit/glue/webkit_glue.h"
namespace chromeos {
typedef struct {
const char* local_root_path;
const char* web_root_path;
} FixedExposedPaths;
// Top level file system elements exposed in FileAPI in ChromeOS:
FixedExposedPaths fixed_exposed_paths[] = {
{"/home/chronos/user/", "Downloads"},
{"/", "media"},
{"/", "tmp"},
};
CrosMountPointProvider::CrosMountPointProvider(
scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy)
: special_storage_policy_(special_storage_policy),
file_access_permissions_(new FileAccessPermissions()) {
for (size_t i = 0; i < arraysize(fixed_exposed_paths); i++) {
mount_point_map_.insert(std::pair<std::string, FilePath>(
std::string(fixed_exposed_paths[i].web_root_path),
FilePath(std::string(fixed_exposed_paths[i].local_root_path))));
}
}
CrosMountPointProvider::~CrosMountPointProvider() {
}
// TODO(zelidrag) share with SandboxMountPointProvider impl.
std::string GetOriginIdentifierFromURL(
const GURL& url) {
WebKit::WebSecurityOrigin web_security_origin =
WebKit::WebSecurityOrigin::createFromString(UTF8ToUTF16(url.spec()));
return web_security_origin.databaseIdentifier().utf8();
}
void CrosMountPointProvider::GetFileSystemRootPath(
const GURL& origin_url,
fileapi::FileSystemType type,
bool create,
fileapi::FileSystemPathManager::GetRootPathCallback* callback_ptr) {
DCHECK(type == fileapi::kFileSystemTypeExternal);
std::string name(GetOriginIdentifierFromURL(origin_url));
name += ':';
name += fileapi::kExternalName;
FilePath root_path = FilePath(fileapi::kExternalDir);
callback_ptr->Run(!root_path.empty(), root_path, name);
}
// Like GetFileSystemRootPath, but synchronous, and can be called only while
// running on the file thread.
FilePath CrosMountPointProvider::GetFileSystemRootPathOnFileThread(
const GURL& origin_url,
fileapi::FileSystemType type,
const FilePath& virtual_path,
bool create) {
DCHECK(type == fileapi::kFileSystemTypeExternal);
std::vector<FilePath::StringType> components;
virtual_path.GetComponents(&components);
if (components.size() < 1) {
return FilePath();
}
// Check if this root directory is exposed by this provider.
MountPointMap::iterator iter = mount_point_map_.find(components[0]);
if (iter == mount_point_map_.end()) {
return FilePath();
}
return iter->second;
}
// TODO(zelidrag): Share this code with SandboxMountPointProvider impl.
bool CrosMountPointProvider::IsRestrictedFileName(const FilePath& path) const {
return false;
}
bool CrosMountPointProvider::IsAccessAllowed(const GURL& origin_url,
fileapi::FileSystemType type,
const FilePath& virtual_path) {
if (type != fileapi::kFileSystemTypeExternal)
return false;
std::string extension_id = origin_url.host();
// Check first to make sure this extension has fileBrowserHander permissions.
if (!special_storage_policy_->IsFileHandler(extension_id))
return false;
return file_access_permissions_->HasAccessPermission(extension_id,
virtual_path);
}
void CrosMountPointProvider::GrantFullAccessToExtension(
const std::string& extension_id) {
DCHECK(special_storage_policy_->IsFileHandler(extension_id));
if (!special_storage_policy_->IsFileHandler(extension_id))
return;
for (MountPointMap::const_iterator iter = mount_point_map_.begin();
iter != mount_point_map_.end();
++iter) {
GrantFileAccessToExtension(extension_id, FilePath(iter->first));
}
}
void CrosMountPointProvider::GrantFileAccessToExtension(
const std::string& extension_id, const FilePath& virtual_path) {
// All we care about here is access from extensions for now.
DCHECK(special_storage_policy_->IsFileHandler(extension_id));
if (!special_storage_policy_->IsFileHandler(extension_id))
return;
file_access_permissions_->GrantAccessPermission(extension_id, virtual_path);
}
void CrosMountPointProvider::RevokeAccessForExtension(
const std::string& extension_id) {
file_access_permissions_->RevokePermissions(extension_id);
}
std::vector<FilePath> CrosMountPointProvider::GetRootDirectories() const {
std::vector<FilePath> root_dirs;
for (MountPointMap::const_iterator iter = mount_point_map_.begin();
iter != mount_point_map_.end();
++iter) {
root_dirs.push_back(iter->second.Append(iter->first));
}
return root_dirs;
}
} // namespace chromeos
|
