/* * 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. */ #ifndef FileReaderLoader_h #define FileReaderLoader_h #include "core/fileapi/FileError.h" #include "core/loader/ThreadableLoaderClient.h" #include "platform/weborigin/KURL.h" #include "wtf/ArrayBuffer.h" #include "wtf/ArrayBufferBuilder.h" #include "wtf/Forward.h" #include "wtf/OwnPtr.h" #include "wtf/text/TextEncoding.h" #include "wtf/text/WTFString.h" namespace WebCore { class BlobDataHandle; class FileReaderLoaderClient; class ExecutionContext; class Stream; class TextResourceDecoder; class ThreadableLoader; class FileReaderLoader FINAL : public ThreadableLoaderClient { public: enum ReadType { ReadAsArrayBuffer, ReadAsBinaryString, ReadAsBlob, ReadAsText, ReadAsDataURL, ReadByClient }; // If client is given, do the loading asynchronously. Otherwise, load synchronously. FileReaderLoader(ReadType, FileReaderLoaderClient*); virtual ~FileReaderLoader(); void start(ExecutionContext*, PassRefPtr<BlobDataHandle>); void start(ExecutionContext*, const Stream&, unsigned readSize); void cancel(); // ThreadableLoaderClient virtual void didReceiveResponse(unsigned long, const ResourceResponse&) OVERRIDE; virtual void didReceiveData(const char*, int) OVERRIDE; virtual void didFinishLoading(unsigned long, double) OVERRIDE; virtual void didFail(const ResourceError&) OVERRIDE; String stringResult(); PassRefPtr<ArrayBuffer> arrayBufferResult() const; // Returns the total bytes received. Bytes ignored by m_rawData won't be // counted. // // This value doesn't grow more than numeric_limits<unsigned> when // m_readType is not set to ReadByClient. long long bytesLoaded() const { return m_bytesLoaded; } // Before didReceiveResponse() is called: Returns -1. // After didReceiveResponse() is called: // - If the size of the resource is known (from // m_response.expectedContentLength() or once didFinishLoading() is // called), returns it. // - Otherwise, returns -1. long long totalBytes() const { return m_totalBytes; } FileError::ErrorCode errorCode() const { return m_errorCode; } void setEncoding(const String&); void setDataType(const String& dataType) { m_dataType = dataType; } private: void startInternal(ExecutionContext*, const Stream*, PassRefPtr<BlobDataHandle>); void terminate(); void cleanup(); void failed(FileError::ErrorCode); void convertToText(); void convertToDataURL(); static FileError::ErrorCode httpStatusCodeToErrorCode(int); ReadType m_readType; FileReaderLoaderClient* m_client; WTF::TextEncoding m_encoding; String m_dataType; KURL m_urlForReading; bool m_urlForReadingIsStream; RefPtr<ThreadableLoader> m_loader; OwnPtr<ArrayBufferBuilder> m_rawData; bool m_isRawDataConverted; String m_stringResult; // The decoder used to decode the text data. OwnPtr<TextResourceDecoder> m_decoder; bool m_finishedLoading; long long m_bytesLoaded; // If the total size of the resource is unknown, m_totalBytes is set to -1 // until completion of loading, and the buffer for receiving data is set to // dynamically grow. Otherwise, m_totalBytes is set to the total size and // the buffer for receiving data of m_totalBytes is allocated and never grow // even when extra data is appeneded. long long m_totalBytes; bool m_hasRange; unsigned m_rangeStart; unsigned m_rangeEnd; FileError::ErrorCode m_errorCode; }; } // namespace WebCore #endif // FileReaderLoader_h