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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "modules/filesystem/DOMFileSystem.h"
#include "core/fileapi/File.h"
#include "modules/filesystem/DOMFilePath.h"
#include "modules/filesystem/DirectoryEntry.h"
#include "modules/filesystem/ErrorCallback.h"
#include "modules/filesystem/FileCallback.h"
#include "modules/filesystem/FileEntry.h"
#include "modules/filesystem/FileSystemCallbacks.h"
#include "modules/filesystem/FileWriter.h"
#include "modules/filesystem/FileWriterBaseCallback.h"
#include "modules/filesystem/FileWriterCallback.h"
#include "modules/filesystem/MetadataCallback.h"
#include "platform/FileMetadata.h"
#include "platform/weborigin/DatabaseIdentifier.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "public/platform/WebFileSystem.h"
#include "public/platform/WebFileSystemCallbacks.h"
#include "wtf/OwnPtr.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
// static
PassRefPtr<DOMFileSystem> DOMFileSystem::create(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
{
RefPtr<DOMFileSystem> fileSystem(adoptRef(new DOMFileSystem(context, name, type, rootURL)));
fileSystem->suspendIfNeeded();
return fileSystem.release();
}
PassRefPtr<DOMFileSystem> DOMFileSystem::createIsolatedFileSystem(ExecutionContext* context, const String& filesystemId)
{
if (filesystemId.isEmpty())
return 0;
StringBuilder filesystemName;
filesystemName.append(createDatabaseIdentifierFromSecurityOrigin(context->securityOrigin()));
filesystemName.append(":Isolated_");
filesystemName.append(filesystemId);
// The rootURL created here is going to be attached to each filesystem request and
// is to be validated each time the request is being handled.
StringBuilder rootURL;
rootURL.append("filesystem:");
rootURL.append(context->securityOrigin()->toString());
rootURL.append("/");
rootURL.append(isolatedPathPrefix);
rootURL.append("/");
rootURL.append(filesystemId);
rootURL.append("/");
return DOMFileSystem::create(context, filesystemName.toString(), FileSystemTypeIsolated, KURL(ParsedURLString, rootURL.toString()));
}
DOMFileSystem::DOMFileSystem(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
: DOMFileSystemBase(context, name, type, rootURL)
, ActiveDOMObject(context)
{
ScriptWrappable::init(this);
}
PassRefPtr<DirectoryEntry> DOMFileSystem::root()
{
return DirectoryEntry::create(this, DOMFilePath::root);
}
void DOMFileSystem::addPendingCallbacks()
{
setPendingActivity(this);
}
void DOMFileSystem::removePendingCallbacks()
{
unsetPendingActivity(this);
}
void DOMFileSystem::reportError(PassOwnPtr<ErrorCallback> errorCallback, PassRefPtr<FileError> fileError)
{
scheduleCallback(errorCallback, fileError);
}
namespace {
class ConvertToFileWriterCallback : public FileWriterBaseCallback {
public:
static PassOwnPtr<ConvertToFileWriterCallback> create(PassOwnPtr<FileWriterCallback> callback)
{
return adoptPtr(new ConvertToFileWriterCallback(callback));
}
void handleEvent(FileWriterBase* fileWriterBase)
{
m_callback->handleEvent(static_cast<FileWriter*>(fileWriterBase));
}
private:
ConvertToFileWriterCallback(PassOwnPtr<FileWriterCallback> callback)
: m_callback(callback)
{
}
OwnPtr<FileWriterCallback> m_callback;
};
}
void DOMFileSystem::createWriter(const FileEntry* fileEntry, PassOwnPtr<FileWriterCallback> successCallback, PassOwnPtr<ErrorCallback> errorCallback)
{
ASSERT(fileEntry);
RefPtr<FileWriter> fileWriter = FileWriter::create(executionContext());
OwnPtr<FileWriterBaseCallback> conversionCallback = ConvertToFileWriterCallback::create(successCallback);
OwnPtr<AsyncFileSystemCallbacks> callbacks = FileWriterBaseCallbacks::create(fileWriter, conversionCallback.release(), errorCallback);
fileSystem()->createFileWriter(createFileSystemURL(fileEntry), fileWriter.get(), callbacks.release());
}
namespace {
class SnapshotFileCallback : public FileSystemCallbacksBase {
public:
static PassOwnPtr<AsyncFileSystemCallbacks> create(PassRefPtr<DOMFileSystem> filesystem, const String& name, const KURL& url, PassOwnPtr<FileCallback> successCallback, PassOwnPtr<ErrorCallback> errorCallback)
{
return adoptPtr(static_cast<AsyncFileSystemCallbacks*>(new SnapshotFileCallback(filesystem, name, url, successCallback, errorCallback)));
}
virtual void didCreateSnapshotFile(const FileMetadata& metadata, PassRefPtr<BlobDataHandle> snapshot)
{
if (!m_successCallback)
return;
// We can't directly use the snapshot blob data handle because the content type on it hasn't been set.
// The |snapshot| param is here to provide a a chain of custody thru thread bridging that is held onto until
// *after* we've coined a File with a new handle that has the correct type set on it. This allows the
// blob storage system to track when a temp file can and can't be safely deleted.
// For regular filesystem types (temporary or persistent), we should not cache file metadata as it could change File semantics.
// For other filesystem types (which could be platform-specific ones), there's a chance that the files are on remote filesystem. If the port has returned metadata just pass it to File constructor (so we may cache the metadata).
// FIXME: We should use the snapshot metadata for all files.
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=17746
if (m_fileSystem->type() == FileSystemTypeTemporary || m_fileSystem->type() == FileSystemTypePersistent) {
m_successCallback->handleEvent(File::createWithName(metadata.platformPath, m_name).get());
} else if (!metadata.platformPath.isEmpty()) {
// If the platformPath in the returned metadata is given, we create a File object for the path.
m_successCallback->handleEvent(File::createForFileSystemFile(m_name, metadata).get());
} else {
// Otherwise create a File from the FileSystem URL.
m_successCallback->handleEvent(File::createForFileSystemFile(m_url, metadata).get());
}
m_successCallback.release();
}
private:
SnapshotFileCallback(PassRefPtr<DOMFileSystem> filesystem, const String& name, const KURL& url, PassOwnPtr<FileCallback> successCallback, PassOwnPtr<ErrorCallback> errorCallback)
: FileSystemCallbacksBase(errorCallback, filesystem.get())
, m_name(name)
, m_url(url)
, m_successCallback(successCallback)
{
}
String m_name;
KURL m_url;
OwnPtr<FileCallback> m_successCallback;
};
} // namespace
void DOMFileSystem::createFile(const FileEntry* fileEntry, PassOwnPtr<FileCallback> successCallback, PassOwnPtr<ErrorCallback> errorCallback)
{
KURL fileSystemURL = createFileSystemURL(fileEntry);
fileSystem()->createSnapshotFileAndReadMetadata(fileSystemURL, SnapshotFileCallback::create(this, fileEntry->name(), fileSystemURL, successCallback, errorCallback));
}
} // namespace WebCore
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