1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "modules/filesystem/LocalFileSystem.h"
33
34#include "core/dom/CrossThreadTask.h"
35#include "core/dom/Document.h"
36#include "core/dom/ExceptionCode.h"
37#include "core/dom/ExecutionContext.h"
38#include "core/fileapi/FileError.h"
39#include "core/frame/LocalFrame.h"
40#include "core/workers/WorkerGlobalScope.h"
41#include "modules/filesystem/FileSystemClient.h"
42#include "platform/AsyncFileSystemCallbacks.h"
43#include "platform/PermissionCallbacks.h"
44#include "public/platform/Platform.h"
45#include "public/platform/WebFileSystem.h"
46#include "wtf/Functional.h"
47#include "wtf/RefCounted.h"
48
49namespace blink {
50
51namespace {
52
53void reportFailure(ExecutionContext*, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, FileError::ErrorCode error)
54{
55    callbacks->didFail(error);
56}
57
58} // namespace
59
60class CallbackWrapper FINAL : public GarbageCollectedFinalized<CallbackWrapper> {
61public:
62    CallbackWrapper(PassOwnPtr<AsyncFileSystemCallbacks> c)
63        : m_callbacks(c)
64    {
65    }
66    virtual ~CallbackWrapper() { }
67    PassOwnPtr<AsyncFileSystemCallbacks> release()
68    {
69        return m_callbacks.release();
70    }
71
72    void trace(Visitor*) { }
73
74private:
75    OwnPtr<AsyncFileSystemCallbacks> m_callbacks;
76};
77
78PassOwnPtrWillBeRawPtr<LocalFileSystem> LocalFileSystem::create(PassOwnPtr<FileSystemClient> client)
79{
80    return adoptPtrWillBeNoop(new LocalFileSystem(client));
81}
82
83LocalFileSystem::~LocalFileSystem()
84{
85}
86
87void LocalFileSystem::resolveURL(ExecutionContext* context, const KURL& fileSystemURL, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
88{
89    RefPtrWillBeRawPtr<ExecutionContext> contextPtr(context);
90    CallbackWrapper* wrapper = new CallbackWrapper(callbacks);
91    requestFileSystemAccessInternal(context,
92        bind(&LocalFileSystem::resolveURLInternal, this, contextPtr, fileSystemURL, wrapper),
93        bind(&LocalFileSystem::fileSystemNotAllowedInternal, this, contextPtr, wrapper));
94}
95
96void LocalFileSystem::requestFileSystem(ExecutionContext* context, FileSystemType type, long long size, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
97{
98    RefPtrWillBeRawPtr<ExecutionContext> contextPtr(context);
99    CallbackWrapper* wrapper = new CallbackWrapper(callbacks);
100    requestFileSystemAccessInternal(context,
101        bind(&LocalFileSystem::fileSystemAllowedInternal, this, contextPtr, type, wrapper),
102        bind(&LocalFileSystem::fileSystemNotAllowedInternal, this, contextPtr, wrapper));
103}
104
105void LocalFileSystem::deleteFileSystem(ExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
106{
107    RefPtrWillBeRawPtr<ExecutionContext> contextPtr(context);
108    ASSERT(context);
109    ASSERT_WITH_SECURITY_IMPLICATION(context->isDocument());
110
111    CallbackWrapper* wrapper = new CallbackWrapper(callbacks);
112    requestFileSystemAccessInternal(context,
113        bind(&LocalFileSystem::deleteFileSystemInternal, this, contextPtr, type, wrapper),
114        bind(&LocalFileSystem::fileSystemNotAllowedInternal, this, contextPtr, wrapper));
115}
116
117WebFileSystem* LocalFileSystem::fileSystem() const
118{
119    Platform* platform = Platform::current();
120    if (!platform)
121        return nullptr;
122    return Platform::current()->fileSystem();
123}
124
125void LocalFileSystem::requestFileSystemAccessInternal(ExecutionContext* context, const Closure& allowed, const Closure& denied)
126{
127    if (!client()) {
128        denied();
129        return;
130    }
131    if (!context->isDocument()) {
132        if (!client()->requestFileSystemAccessSync(context)) {
133            denied();
134            return;
135        }
136        allowed();
137        return;
138    }
139    client()->requestFileSystemAccessAsync(context, PermissionCallbacks::create(allowed, denied));
140}
141
142void LocalFileSystem::fileSystemNotAvailable(
143    PassRefPtrWillBeRawPtr<ExecutionContext> context,
144    CallbackWrapper* callbacks)
145{
146    context->postTask(createCrossThreadTask(&reportFailure, callbacks->release(), FileError::ABORT_ERR));
147}
148
149void LocalFileSystem::fileSystemNotAllowedInternal(
150    PassRefPtrWillBeRawPtr<ExecutionContext> context,
151    CallbackWrapper* callbacks)
152{
153    context->postTask(createCrossThreadTask(&reportFailure, callbacks->release(), FileError::ABORT_ERR));
154}
155
156void LocalFileSystem::fileSystemAllowedInternal(
157    PassRefPtrWillBeRawPtr<ExecutionContext> context,
158    FileSystemType type,
159    CallbackWrapper* callbacks)
160{
161    if (!fileSystem()) {
162        fileSystemNotAvailable(context, callbacks);
163        return;
164    }
165
166    KURL storagePartition = KURL(KURL(), context->securityOrigin()->toString());
167    fileSystem()->openFileSystem(storagePartition, static_cast<WebFileSystemType>(type), callbacks->release());
168}
169
170void LocalFileSystem::resolveURLInternal(
171    PassRefPtrWillBeRawPtr<ExecutionContext> context,
172    const KURL& fileSystemURL,
173    CallbackWrapper* callbacks)
174{
175    if (!fileSystem()) {
176        fileSystemNotAvailable(context, callbacks);
177        return;
178    }
179    fileSystem()->resolveURL(fileSystemURL, callbacks->release());
180}
181
182void LocalFileSystem::deleteFileSystemInternal(
183    PassRefPtrWillBeRawPtr<ExecutionContext> context,
184    FileSystemType type,
185    CallbackWrapper* callbacks)
186{
187    if (!fileSystem()) {
188        fileSystemNotAvailable(context, callbacks);
189        return;
190    }
191    KURL storagePartition = KURL(KURL(), context->securityOrigin()->toString());
192    fileSystem()->deleteFileSystem(storagePartition, static_cast<WebFileSystemType>(type), callbacks->release());
193}
194
195LocalFileSystem::LocalFileSystem(PassOwnPtr<FileSystemClient> client)
196    : m_client(client)
197{
198}
199
200const char* LocalFileSystem::supplementName()
201{
202    return "LocalFileSystem";
203}
204
205LocalFileSystem* LocalFileSystem::from(ExecutionContext& context)
206{
207    if (context.isDocument()) {
208        return static_cast<LocalFileSystem*>(WillBeHeapSupplement<LocalFrame>::from(toDocument(context).frame(), supplementName()));
209    }
210    ASSERT(context.isWorkerGlobalScope());
211    return static_cast<LocalFileSystem*>(WillBeHeapSupplement<WorkerClients>::from(toWorkerGlobalScope(context).clients(), supplementName()));
212}
213
214void provideLocalFileSystemTo(LocalFrame& frame, PassOwnPtr<FileSystemClient> client)
215{
216    frame.provideSupplement(LocalFileSystem::supplementName(), LocalFileSystem::create(client));
217}
218
219void provideLocalFileSystemToWorker(WorkerClients* clients, PassOwnPtr<FileSystemClient> client)
220{
221    clients->provideSupplement(LocalFileSystem::supplementName(), LocalFileSystem::create(client));
222}
223
224} // namespace blink
225