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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// Copyright 2013 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/browser/fileapi/sandbox_prioritized_origin_database.h"
#include "base/file_util.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/pickle.h"
#include "webkit/browser/fileapi/sandbox_isolated_origin_database.h"
#include "webkit/browser/fileapi/sandbox_origin_database.h"
namespace storage {
namespace {
const base::FilePath::CharType kPrimaryDirectory[] =
FILE_PATH_LITERAL("primary");
const base::FilePath::CharType kPrimaryOriginFile[] =
FILE_PATH_LITERAL("primary.origin");
bool WritePrimaryOriginFile(const base::FilePath& path,
const std::string& origin) {
base::File file(path, base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_WRITE);
if (!file.IsValid())
return false;
if (!file.created())
file.SetLength(0);
Pickle pickle;
pickle.WriteString(origin);
file.Write(0, static_cast<const char*>(pickle.data()), pickle.size());
file.Flush();
return true;
}
bool ReadPrimaryOriginFile(const base::FilePath& path,
std::string* origin) {
std::string buffer;
if (!base::ReadFileToString(path, &buffer))
return false;
Pickle pickle(buffer.data(), buffer.size());
PickleIterator iter(pickle);
return pickle.ReadString(&iter, origin) && !origin->empty();
}
} // namespace
SandboxPrioritizedOriginDatabase::SandboxPrioritizedOriginDatabase(
const base::FilePath& file_system_directory,
leveldb::Env* env_override)
: file_system_directory_(file_system_directory),
env_override_(env_override),
primary_origin_file_(
file_system_directory_.Append(kPrimaryOriginFile)) {
}
SandboxPrioritizedOriginDatabase::~SandboxPrioritizedOriginDatabase() {
}
bool SandboxPrioritizedOriginDatabase::InitializePrimaryOrigin(
const std::string& origin) {
if (!primary_origin_database_) {
if (!MaybeLoadPrimaryOrigin() && ResetPrimaryOrigin(origin)) {
MaybeMigrateDatabase(origin);
primary_origin_database_.reset(
new SandboxIsolatedOriginDatabase(
origin,
file_system_directory_,
base::FilePath(kPrimaryDirectory)));
return true;
}
}
if (primary_origin_database_)
return primary_origin_database_->HasOriginPath(origin);
return false;
}
std::string SandboxPrioritizedOriginDatabase::GetPrimaryOrigin() {
MaybeLoadPrimaryOrigin();
if (primary_origin_database_)
return primary_origin_database_->origin();
return std::string();
}
bool SandboxPrioritizedOriginDatabase::HasOriginPath(
const std::string& origin) {
MaybeInitializeDatabases(false);
if (primary_origin_database_ &&
primary_origin_database_->HasOriginPath(origin))
return true;
if (origin_database_)
return origin_database_->HasOriginPath(origin);
return false;
}
bool SandboxPrioritizedOriginDatabase::GetPathForOrigin(
const std::string& origin, base::FilePath* directory) {
MaybeInitializeDatabases(true);
if (primary_origin_database_ &&
primary_origin_database_->GetPathForOrigin(origin, directory))
return true;
DCHECK(origin_database_);
return origin_database_->GetPathForOrigin(origin, directory);
}
bool SandboxPrioritizedOriginDatabase::RemovePathForOrigin(
const std::string& origin) {
MaybeInitializeDatabases(false);
if (primary_origin_database_ &&
primary_origin_database_->HasOriginPath(origin)) {
primary_origin_database_.reset();
base::DeleteFile(file_system_directory_.Append(kPrimaryOriginFile),
true /* recursive */);
return true;
}
if (origin_database_)
return origin_database_->RemovePathForOrigin(origin);
return true;
}
bool SandboxPrioritizedOriginDatabase::ListAllOrigins(
std::vector<OriginRecord>* origins) {
// SandboxOriginDatabase may clear the |origins|, so call this before
// primary_origin_database_.
MaybeInitializeDatabases(false);
if (origin_database_ && !origin_database_->ListAllOrigins(origins))
return false;
if (primary_origin_database_)
return primary_origin_database_->ListAllOrigins(origins);
return true;
}
void SandboxPrioritizedOriginDatabase::DropDatabase() {
primary_origin_database_.reset();
origin_database_.reset();
}
bool SandboxPrioritizedOriginDatabase::MaybeLoadPrimaryOrigin() {
if (primary_origin_database_)
return true;
std::string saved_origin;
if (!ReadPrimaryOriginFile(primary_origin_file_, &saved_origin))
return false;
primary_origin_database_.reset(
new SandboxIsolatedOriginDatabase(
saved_origin,
file_system_directory_,
base::FilePath(kPrimaryDirectory)));
return true;
}
bool SandboxPrioritizedOriginDatabase::ResetPrimaryOrigin(
const std::string& origin) {
DCHECK(!primary_origin_database_);
if (!WritePrimaryOriginFile(primary_origin_file_, origin))
return false;
// We reset the primary origin directory too.
// (This means the origin file corruption causes data loss
// We could keep the directory there as the same origin will likely
// become the primary origin, but let's play conservatively.)
base::DeleteFile(file_system_directory_.Append(kPrimaryDirectory),
true /* recursive */);
return true;
}
void SandboxPrioritizedOriginDatabase::MaybeMigrateDatabase(
const std::string& origin) {
MaybeInitializeNonPrimaryDatabase(false);
if (!origin_database_)
return;
if (origin_database_->HasOriginPath(origin)) {
base::FilePath directory_name;
if (origin_database_->GetPathForOrigin(origin, &directory_name) &&
directory_name != base::FilePath(kPrimaryOriginFile)) {
base::FilePath from_path = file_system_directory_.Append(directory_name);
base::FilePath to_path = file_system_directory_.Append(kPrimaryDirectory);
if (base::PathExists(to_path))
base::DeleteFile(to_path, true /* recursive */);
base::Move(from_path, to_path);
}
origin_database_->RemovePathForOrigin(origin);
}
std::vector<OriginRecord> origins;
origin_database_->ListAllOrigins(&origins);
if (origins.empty()) {
origin_database_->RemoveDatabase();
origin_database_.reset();
}
}
void SandboxPrioritizedOriginDatabase::MaybeInitializeDatabases(
bool create) {
MaybeLoadPrimaryOrigin();
MaybeInitializeNonPrimaryDatabase(create);
}
void SandboxPrioritizedOriginDatabase::MaybeInitializeNonPrimaryDatabase(
bool create) {
if (origin_database_)
return;
origin_database_.reset(new SandboxOriginDatabase(file_system_directory_,
env_override_));
if (!create && !base::DirectoryExists(origin_database_->GetDatabasePath())) {
origin_database_.reset();
return;
}
}
SandboxOriginDatabase*
SandboxPrioritizedOriginDatabase::GetSandboxOriginDatabase() {
MaybeInitializeNonPrimaryDatabase(true);
return origin_database_.get();
}
} // namespace storage
|
