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/DOMFileSystemSync.h" 33 34 #include "bindings/v8/ExceptionState.h" 35 #include "core/dom/ExceptionCode.h" 36 #include "core/fileapi/File.h" 37 #include "core/fileapi/FileError.h" 38 #include "core/platform/AsyncFileSystem.h" 39 #include "core/platform/FileMetadata.h" 40 #include "modules/filesystem/AsyncFileWriter.h" 41 #include "modules/filesystem/DOMFilePath.h" 42 #include "modules/filesystem/DirectoryEntrySync.h" 43 #include "modules/filesystem/ErrorCallback.h" 44 #include "modules/filesystem/FileEntrySync.h" 45 #include "modules/filesystem/FileSystemCallbacks.h" 46 #include "modules/filesystem/FileWriterBaseCallback.h" 47 #include "modules/filesystem/FileWriterSync.h" 48 49 namespace WebCore { 50 51 class FileWriterBase; 52 53 PassRefPtr<DOMFileSystemSync> DOMFileSystemSync::create(DOMFileSystemBase* fileSystem) 54 { 55 return adoptRef(new DOMFileSystemSync(fileSystem->m_context, fileSystem->name(), fileSystem->type(), fileSystem->rootURL(), fileSystem->m_asyncFileSystem.release())); 56 } 57 58 DOMFileSystemSync::DOMFileSystemSync(ScriptExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL, PassOwnPtr<AsyncFileSystem> asyncFileSystem) 59 : DOMFileSystemBase(context, name, type, rootURL, asyncFileSystem) 60 { 61 ScriptWrappable::init(this); 62 } 63 64 DOMFileSystemSync::~DOMFileSystemSync() 65 { 66 } 67 68 PassRefPtr<DirectoryEntrySync> DOMFileSystemSync::root() 69 { 70 return DirectoryEntrySync::create(this, DOMFilePath::root); 71 } 72 73 namespace { 74 75 class CreateFileHelper : public AsyncFileSystemCallbacks { 76 public: 77 class CreateFileResult : public RefCounted<CreateFileResult> { 78 public: 79 static PassRefPtr<CreateFileResult> create() 80 { 81 return adoptRef(new CreateFileResult()); 82 } 83 84 bool m_failed; 85 int m_code; 86 RefPtr<File> m_file; 87 88 private: 89 CreateFileResult() 90 : m_failed(false) 91 , m_code(0) 92 { 93 } 94 95 ~CreateFileResult() 96 { 97 } 98 friend class WTF::RefCounted<CreateFileResult>; 99 }; 100 101 static PassOwnPtr<CreateFileHelper> create(PassRefPtr<CreateFileResult> result, const String& name, const KURL& url, FileSystemType type) 102 { 103 return adoptPtr(new CreateFileHelper(result, name, url, type)); 104 } 105 106 virtual void didFail(int code) 107 { 108 m_result->m_failed = true; 109 m_result->m_code = code; 110 } 111 112 virtual ~CreateFileHelper() 113 { 114 } 115 116 virtual void didCreateSnapshotFile(const FileMetadata& metadata, PassRefPtr<BlobDataHandle> snapshot) 117 { 118 // We can't directly use the snapshot blob data handle because the content type on it hasn't been set. 119 // The |snapshot| param is here to provide a a chain of custody thru thread bridging that is held onto until 120 // *after* we've coined a File with a new handle that has the correct type set on it. This allows the 121 // blob storage system to track when a temp file can and can't be safely deleted. 122 123 // For regular filesystem types (temporary or persistent), we should not cache file metadata as it could change File semantics. 124 // For other filesystem types (which could be platform-specific ones), there's a chance that the files are on remote filesystem. 125 // If the port has returned metadata just pass it to File constructor (so we may cache the metadata). 126 // FIXME: We should use the snapshot metadata for all files. 127 // https://www.w3.org/Bugs/Public/show_bug.cgi?id=17746 128 if (m_type == FileSystemTypeTemporary || m_type == FileSystemTypePersistent) { 129 m_result->m_file = File::createWithName(metadata.platformPath, m_name); 130 } else if (!metadata.platformPath.isEmpty()) { 131 // If the platformPath in the returned metadata is given, we create a File object for the path. 132 m_result->m_file = File::createForFileSystemFile(m_name, metadata).get(); 133 } else { 134 // Otherwise create a File from the FileSystem URL. 135 m_result->m_file = File::createForFileSystemFile(m_url, metadata).get(); 136 } 137 } 138 private: 139 CreateFileHelper(PassRefPtr<CreateFileResult> result, const String& name, const KURL& url, FileSystemType type) 140 : m_result(result) 141 , m_name(name) 142 , m_url(url) 143 , m_type(type) 144 { 145 } 146 147 RefPtr<CreateFileResult> m_result; 148 String m_name; 149 KURL m_url; 150 FileSystemType m_type; 151 }; 152 153 } // namespace 154 155 PassRefPtr<File> DOMFileSystemSync::createFile(const FileEntrySync* fileEntry, ExceptionState& es) 156 { 157 KURL fileSystemURL = createFileSystemURL(fileEntry); 158 RefPtr<CreateFileHelper::CreateFileResult> result(CreateFileHelper::CreateFileResult::create()); 159 m_asyncFileSystem->createSnapshotFileAndReadMetadata(fileSystemURL, CreateFileHelper::create(result, fileEntry->name(), fileSystemURL, type())); 160 if (!m_asyncFileSystem->waitForOperationToComplete()) { 161 es.throwDOMException(AbortError, FileError::abortErrorMessage); 162 return 0; 163 } 164 if (result->m_failed) { 165 es.throwDOMException(result->m_code); 166 return 0; 167 } 168 return result->m_file; 169 } 170 171 namespace { 172 173 class ReceiveFileWriterCallback : public FileWriterBaseCallback { 174 public: 175 static PassRefPtr<ReceiveFileWriterCallback> create() 176 { 177 return adoptRef(new ReceiveFileWriterCallback()); 178 } 179 180 bool handleEvent(FileWriterBase* fileWriterBase) 181 { 182 #ifndef NDEBUG 183 m_fileWriterBase = fileWriterBase; 184 #else 185 ASSERT_UNUSED(fileWriterBase, fileWriterBase); 186 #endif 187 return true; 188 } 189 190 #ifndef NDEBUG 191 FileWriterBase* fileWriterBase() 192 { 193 return m_fileWriterBase; 194 } 195 #endif 196 197 private: 198 ReceiveFileWriterCallback() 199 #ifndef NDEBUG 200 : m_fileWriterBase(0) 201 #endif 202 { 203 } 204 205 #ifndef NDEBUG 206 FileWriterBase* m_fileWriterBase; 207 #endif 208 }; 209 210 class LocalErrorCallback : public ErrorCallback { 211 public: 212 static PassRefPtr<LocalErrorCallback> create() 213 { 214 return adoptRef(new LocalErrorCallback()); 215 } 216 217 bool handleEvent(FileError* error) 218 { 219 m_error = error; 220 return true; 221 } 222 223 FileError* error() 224 { 225 return m_error.get(); 226 } 227 228 private: 229 LocalErrorCallback() 230 { 231 } 232 RefPtr<FileError> m_error; 233 }; 234 235 } 236 237 PassRefPtr<FileWriterSync> DOMFileSystemSync::createWriter(const FileEntrySync* fileEntry, ExceptionState& es) 238 { 239 ASSERT(fileEntry); 240 241 RefPtr<FileWriterSync> fileWriter = FileWriterSync::create(); 242 RefPtr<ReceiveFileWriterCallback> successCallback = ReceiveFileWriterCallback::create(); 243 RefPtr<LocalErrorCallback> errorCallback = LocalErrorCallback::create(); 244 245 OwnPtr<FileWriterBaseCallbacks> callbacks = FileWriterBaseCallbacks::create(fileWriter, successCallback, errorCallback); 246 callbacks->setShouldBlockUntilCompletion(true); 247 248 m_asyncFileSystem->createWriter(fileWriter.get(), createFileSystemURL(fileEntry), callbacks.release()); 249 if (!m_asyncFileSystem->waitForOperationToComplete()) { 250 es.throwDOMException(AbortError, FileError::abortErrorMessage); 251 return 0; 252 } 253 if (errorCallback->error()) { 254 ASSERT(!successCallback->fileWriterBase()); 255 FileError::ErrorCode errorCode = errorCallback->error()->code(); 256 if (errorCode) 257 FileError::throwDOMException(es, errorCode); 258 return 0; 259 } 260 ASSERT(successCallback->fileWriterBase()); 261 ASSERT(static_cast<FileWriterSync*>(successCallback->fileWriterBase()) == fileWriter.get()); 262 return fileWriter; 263 } 264 265 } 266