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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.
*/
#pragma once
#include "BlobResourceHandle.h"
#include "ExceptionCode.h"
#include "ThreadableLoaderClient.h"
#include "URLKeepingBlobAlive.h"
#include <pal/text/TextEncoding.h>
#include <wtf/Forward.h>
#include <wtf/URL.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/WTFString.h>
namespace JSC {
class ArrayBuffer;
}
namespace WebCore {
class Blob;
class FileReaderLoaderClient;
class ScriptExecutionContext;
class TextResourceDecoder;
class ThreadableLoader;
class FileReaderLoader final : public ThreadableLoaderClient {
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(Loader);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(FileReaderLoader);
public:
enum ReadType {
ReadAsArrayBuffer,
ReadAsBinaryString,
ReadAsBlob,
ReadAsText,
ReadAsDataURL,
ReadAsBinaryChunks
};
// If client is given, do the loading asynchronously. Otherwise, load synchronously.
WEBCORE_EXPORT FileReaderLoader(ReadType, FileReaderLoaderClient*);
~FileReaderLoader();
WEBCORE_EXPORT void start(ScriptExecutionContext*, Blob&);
void start(ScriptExecutionContext*, const URL&);
WEBCORE_EXPORT void cancel();
// ThreadableLoaderClient
void didReceiveResponse(ScriptExecutionContextIdentifier, std::optional<ResourceLoaderIdentifier>, const ResourceResponse&) override;
void didReceiveData(const SharedBuffer&) override;
void didFinishLoading(ScriptExecutionContextIdentifier, std::optional<ResourceLoaderIdentifier>, const NetworkLoadMetrics&) override;
void didFail(std::optional<ScriptExecutionContextIdentifier>, const ResourceError&) override;
String stringResult();
WEBCORE_EXPORT RefPtr<JSC::ArrayBuffer> arrayBufferResult() const;
unsigned bytesLoaded() const { return m_bytesLoaded; }
unsigned totalBytes() const { return m_totalBytes; }
std::optional<ExceptionCode> errorCode() const { return m_errorCode; }
void setEncoding(StringView);
void setDataType(const String& dataType) { m_dataType = dataType; }
const URL& url() { return m_urlForReading; }
bool isCompleted() const;
private:
void terminate();
void cleanup();
void failed(ExceptionCode);
void convertToText();
void convertToDataURL();
bool processResponse(const ResourceResponse&);
static ExceptionCode httpStatusCodeToErrorCode(int);
static ExceptionCode toErrorCode(BlobResourceHandle::Error);
ReadType m_readType;
WeakPtr<FileReaderLoaderClient> m_client;
PAL::TextEncoding m_encoding;
String m_dataType;
URLKeepingBlobAlive m_urlForReading;
RefPtr<ThreadableLoader> m_loader;
RefPtr<JSC::ArrayBuffer> m_rawData;
bool m_isRawDataConverted;
String m_stringResult;
RefPtr<Blob> m_blobResult;
// The decoder used to decode the text data.
RefPtr<TextResourceDecoder> m_decoder;
bool m_variableLength;
unsigned m_bytesLoaded;
unsigned m_totalBytes;
std::optional<ExceptionCode> m_errorCode;
};
} // namespace WebCore
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