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
53 namespace blink {
54
55 // static
create(ExecutionContext * context,const String & name,FileSystemType type,const KURL & rootURL)56 DOMFileSystem* 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
createIsolatedFileSystem(ExecutionContext * context,const String & filesystemId)63 DOMFileSystem* 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
DOMFileSystem(ExecutionContext * context,const String & name,FileSystemType type,const KURL & rootURL)87 DOMFileSystem::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
root()94 DirectoryEntry* DOMFileSystem::root()
95 {
96 return DirectoryEntry::create(this, DOMFilePath::root);
97 }
98
addPendingCallbacks()99 void DOMFileSystem::addPendingCallbacks()
100 {
101 ++m_numberOfPendingCallbacks;
102 }
103
removePendingCallbacks()104 void DOMFileSystem::removePendingCallbacks()
105 {
106 ASSERT(m_numberOfPendingCallbacks > 0);
107 --m_numberOfPendingCallbacks;
108 }
109
hasPendingActivity() const110 bool DOMFileSystem::hasPendingActivity() const
111 {
112 ASSERT(m_numberOfPendingCallbacks >= 0);
113 return m_numberOfPendingCallbacks;
114 }
115
reportError(ErrorCallback * errorCallback,PassRefPtrWillBeRawPtr<FileError> fileError)116 void DOMFileSystem::reportError(ErrorCallback* errorCallback, PassRefPtrWillBeRawPtr<FileError> fileError)
117 {
118 scheduleCallback(errorCallback, fileError);
119 }
120
121 namespace {
122
123 class ConvertToFileWriterCallback : public FileWriterBaseCallback {
124 public:
create(FileWriterCallback * callback)125 static ConvertToFileWriterCallback* create(FileWriterCallback* callback)
126 {
127 return new ConvertToFileWriterCallback(callback);
128 }
129
trace(Visitor * visitor)130 void trace(Visitor* visitor)
131 {
132 visitor->trace(m_callback);
133 FileWriterBaseCallback::trace(visitor);
134 }
135
handleEvent(FileWriterBase * fileWriterBase)136 void handleEvent(FileWriterBase* fileWriterBase)
137 {
138 m_callback->handleEvent(static_cast<FileWriter*>(fileWriterBase));
139 }
140 private:
ConvertToFileWriterCallback(FileWriterCallback * callback)141 explicit ConvertToFileWriterCallback(FileWriterCallback* callback)
142 : m_callback(callback)
143 {
144 }
145 Member<FileWriterCallback> m_callback;
146 };
147
148 }
149
createWriter(const FileEntry * fileEntry,FileWriterCallback * successCallback,ErrorCallback * errorCallback)150 void 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
createFile(const FileEntry * fileEntry,FileCallback * successCallback,ErrorCallback * errorCallback)165 void 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