1/*
2 * Copyright (C) 2010 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/DOMFileSystem.h"
33
34#include "modules/filesystem/DOMFilePath.h"
35#include "modules/filesystem/DirectoryEntry.h"
36#include "modules/filesystem/ErrorCallback.h"
37#include "modules/filesystem/FileCallback.h"
38#include "modules/filesystem/FileEntry.h"
39#include "modules/filesystem/FileSystemCallbacks.h"
40#include "modules/filesystem/FileWriter.h"
41#include "modules/filesystem/FileWriterBaseCallback.h"
42#include "modules/filesystem/FileWriterCallback.h"
43#include "modules/filesystem/MetadataCallback.h"
44#include "platform/FileMetadata.h"
45#include "platform/weborigin/DatabaseIdentifier.h"
46#include "platform/weborigin/SecurityOrigin.h"
47#include "public/platform/WebFileSystem.h"
48#include "public/platform/WebFileSystemCallbacks.h"
49#include "wtf/OwnPtr.h"
50#include "wtf/text/StringBuilder.h"
51#include "wtf/text/WTFString.h"
52
53namespace blink {
54
55// static
56DOMFileSystem* DOMFileSystem::create(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
57{
58    DOMFileSystem* fileSystem(new DOMFileSystem(context, name, type, rootURL));
59    fileSystem->suspendIfNeeded();
60    return fileSystem;
61}
62
63DOMFileSystem* DOMFileSystem::createIsolatedFileSystem(ExecutionContext* context, const String& filesystemId)
64{
65    if (filesystemId.isEmpty())
66        return 0;
67
68    StringBuilder filesystemName;
69    filesystemName.append(createDatabaseIdentifierFromSecurityOrigin(context->securityOrigin()));
70    filesystemName.appendLiteral(":Isolated_");
71    filesystemName.append(filesystemId);
72
73    // The rootURL created here is going to be attached to each filesystem request and
74    // is to be validated each time the request is being handled.
75    StringBuilder rootURL;
76    rootURL.appendLiteral("filesystem:");
77    rootURL.append(context->securityOrigin()->toString());
78    rootURL.append('/');
79    rootURL.append(isolatedPathPrefix);
80    rootURL.append('/');
81    rootURL.append(filesystemId);
82    rootURL.append('/');
83
84    return DOMFileSystem::create(context, filesystemName.toString(), FileSystemTypeIsolated, KURL(ParsedURLString, rootURL.toString()));
85}
86
87DOMFileSystem::DOMFileSystem(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
88    : DOMFileSystemBase(context, name, type, rootURL)
89    , ActiveDOMObject(context)
90    , m_numberOfPendingCallbacks(0)
91{
92}
93
94DirectoryEntry* DOMFileSystem::root()
95{
96    return DirectoryEntry::create(this, DOMFilePath::root);
97}
98
99void DOMFileSystem::addPendingCallbacks()
100{
101    ++m_numberOfPendingCallbacks;
102}
103
104void DOMFileSystem::removePendingCallbacks()
105{
106    ASSERT(m_numberOfPendingCallbacks > 0);
107    --m_numberOfPendingCallbacks;
108}
109
110bool DOMFileSystem::hasPendingActivity() const
111{
112    ASSERT(m_numberOfPendingCallbacks >= 0);
113    return m_numberOfPendingCallbacks;
114}
115
116void DOMFileSystem::reportError(ErrorCallback* errorCallback, PassRefPtrWillBeRawPtr<FileError> fileError)
117{
118    scheduleCallback(errorCallback, fileError);
119}
120
121namespace {
122
123class ConvertToFileWriterCallback : public FileWriterBaseCallback {
124public:
125    static ConvertToFileWriterCallback* create(FileWriterCallback* callback)
126    {
127        return new ConvertToFileWriterCallback(callback);
128    }
129
130    void trace(Visitor* visitor)
131    {
132        visitor->trace(m_callback);
133        FileWriterBaseCallback::trace(visitor);
134    }
135
136    void handleEvent(FileWriterBase* fileWriterBase)
137    {
138        m_callback->handleEvent(static_cast<FileWriter*>(fileWriterBase));
139    }
140private:
141    explicit ConvertToFileWriterCallback(FileWriterCallback* callback)
142        : m_callback(callback)
143    {
144    }
145    Member<FileWriterCallback> m_callback;
146};
147
148}
149
150void DOMFileSystem::createWriter(const FileEntry* fileEntry, FileWriterCallback* successCallback, ErrorCallback* errorCallback)
151{
152    ASSERT(fileEntry);
153
154    if (!fileSystem()) {
155        reportError(errorCallback, FileError::create(FileError::ABORT_ERR));
156        return;
157    }
158
159    FileWriter* fileWriter = FileWriter::create(executionContext());
160    FileWriterBaseCallback* conversionCallback = ConvertToFileWriterCallback::create(successCallback);
161    OwnPtr<AsyncFileSystemCallbacks> callbacks = FileWriterBaseCallbacks::create(fileWriter, conversionCallback, errorCallback, m_context);
162    fileSystem()->createFileWriter(createFileSystemURL(fileEntry), fileWriter, callbacks.release());
163}
164
165void DOMFileSystem::createFile(const FileEntry* fileEntry, FileCallback* successCallback, ErrorCallback* errorCallback)
166{
167    KURL fileSystemURL = createFileSystemURL(fileEntry);
168    if (!fileSystem()) {
169        reportError(errorCallback, FileError::create(FileError::ABORT_ERR));
170        return;
171    }
172
173    fileSystem()->createSnapshotFileAndReadMetadata(fileSystemURL, SnapshotFileCallback::create(this, fileEntry->name(), fileSystemURL, successCallback, errorCallback, m_context));
174}
175
176} // namespace blink
177