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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"
#if ENABLE(BLOB)
#include "FileReaderSync.h"
#include "Base64.h"
#include "Blob.h"
#include "BlobURL.h"
#include "FileReader.h"
#include "ResourceRequest.h"
#include "ScriptExecutionContext.h"
#include "TextEncoding.h"
#include "TextResourceDecoder.h"
#include "ThreadableBlobRegistry.h"
#include "ThreadableLoader.h"
namespace WebCore {
class FileReaderSyncLoader : public ThreadableLoaderClient {
public:
// If the output result is provided, use it. Otherwise, save it as the raw data.
FileReaderSyncLoader(ScriptString* result);
// Returns the http status code.
void start(ScriptExecutionContext*, const ResourceRequest&, ExceptionCode&);
// ThreadableLoaderClient
virtual void didReceiveResponse(const ResourceResponse&);
virtual void didReceiveData(const char*, int);
virtual void didFinishLoading(unsigned long identifier);
virtual void didFail(const ResourceError&);
const Vector<char>& rawData() const { return m_rawData; }
private:
// The output result. The caller provides this in order to load the binary data directly.
ScriptString* m_result;
// The raw data. The caller does not provide the above output result and we need to save it here.
Vector<char> m_rawData;
int m_httpStatusCode;
};
FileReaderSyncLoader::FileReaderSyncLoader(ScriptString* result)
: m_result(result)
, m_httpStatusCode(0)
{
}
void FileReaderSyncLoader::start(ScriptExecutionContext* scriptExecutionContext, const ResourceRequest& request, ExceptionCode& ec)
{
ThreadableLoaderOptions options;
options.sendLoadCallbacks = true;
options.sniffContent = false;
options.forcePreflight = false;
options.allowCredentials = true;
options.crossOriginRequestPolicy = DenyCrossOriginRequests;
ThreadableLoader::loadResourceSynchronously(scriptExecutionContext, request, *this, options);
ec = (m_httpStatusCode == 200) ? 0 : FileReader::httpStatusCodeToExceptionCode(m_httpStatusCode);
}
void FileReaderSyncLoader::didReceiveResponse(const ResourceResponse& response)
{
m_httpStatusCode = response.httpStatusCode();
}
void FileReaderSyncLoader::didReceiveData(const char* data, int lengthReceived)
{
if (m_result)
*m_result += String(data, static_cast<unsigned>(lengthReceived));
else
m_rawData.append(data, static_cast<unsigned>(lengthReceived));
}
void FileReaderSyncLoader::didFinishLoading(unsigned long)
{
}
void FileReaderSyncLoader::didFail(const ResourceError&)
{
// Treat as internal error.
m_httpStatusCode = 500;
}
FileReaderSync::FileReaderSync()
: m_result("")
{
}
const ScriptString& FileReaderSync::readAsBinaryString(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionCode& ec)
{
if (!blob)
return m_result;
read(scriptExecutionContext, blob, ReadAsBinaryString, ec);
return m_result;
}
const ScriptString& FileReaderSync::readAsText(ScriptExecutionContext* scriptExecutionContext, Blob* blob, const String& encoding, ExceptionCode& ec)
{
if (!blob)
return m_result;
m_encoding = encoding;
read(scriptExecutionContext, blob, ReadAsText, ec);
return m_result;
}
const ScriptString& FileReaderSync::readAsDataURL(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionCode& ec)
{
if (!blob)
return m_result;
read(scriptExecutionContext, blob, ReadAsDataURL, ec);
return m_result;
}
void FileReaderSync::read(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ReadType readType, ExceptionCode& ec)
{
// The blob is read by routing through the request handling layer given the temporary public url.
KURL urlForReading = BlobURL::createPublicURL(scriptExecutionContext->securityOrigin());
ThreadableBlobRegistry::registerBlobURL(urlForReading, blob->url());
ResourceRequest request(urlForReading);
request.setHTTPMethod("GET");
FileReaderSyncLoader loader((readType == ReadAsBinaryString) ? &m_result : 0);
loader.start(scriptExecutionContext, request, ec);
ThreadableBlobRegistry::unregisterBlobURL(urlForReading);
if (ec)
return;
switch (readType) {
case ReadAsBinaryString:
// Nothing to do since we need no conversion.
return;
case ReadAsText:
convertToText(loader.rawData().data(), loader.rawData().size(), m_result);
return;
case ReadAsDataURL:
FileReader::convertToDataURL(loader.rawData(), blob->type(), m_result);
return;
}
ASSERT_NOT_REACHED();
}
void FileReaderSync::convertToText(const char* data, int size, ScriptString& result)
{
if (!size)
return;
// Decode the data.
// The File API spec says that we should use the supplied encoding if it is valid. However, we choose to ignore this
// requirement in order to be consistent with how WebKit decodes the web content: always have the BOM override the
// provided encoding.
// FIXME: consider supporting incremental decoding to improve the perf.
RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("text/plain", m_encoding.isEmpty() ? UTF8Encoding() : TextEncoding(m_encoding));
result = decoder->decode(data, size);
result += decoder->flush();
}
} // namespace WebCore
#endif // ENABLE(BLOB)
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