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 #ifndef FileReaderLoader_h 32 #define FileReaderLoader_h 33 34 #if ENABLE(BLOB) 35 36 #include "FileError.h" 37 #include "KURL.h" 38 #include "TextEncoding.h" 39 #include "ThreadableLoaderClient.h" 40 #include <wtf/Forward.h> 41 #include <wtf/text/WTFString.h> 42 43 namespace WebCore { 44 45 class ArrayBuffer; 46 class Blob; 47 class FileReaderLoaderClient; 48 class ScriptExecutionContext; 49 class TextResourceDecoder; 50 class ThreadableLoader; 51 52 class FileReaderLoader : public ThreadableLoaderClient { 53 public: 54 enum ReadType { 55 ReadAsArrayBuffer, 56 ReadAsBinaryString, 57 ReadAsText, 58 ReadAsDataURL 59 }; 60 61 // If client is given, do the loading asynchronously. Otherwise, load synchronously. 62 FileReaderLoader(ReadType, FileReaderLoaderClient*); 63 ~FileReaderLoader(); 64 65 void start(ScriptExecutionContext*, Blob*); 66 void cancel(); 67 68 // ThreadableLoaderClient 69 virtual void didReceiveResponse(const ResourceResponse&); 70 virtual void didReceiveData(const char*, int); 71 virtual void didFinishLoading(unsigned long, double); 72 virtual void didFail(const ResourceError&); 73 74 String stringResult(); 75 PassRefPtr<ArrayBuffer> arrayBufferResult() const; bytesLoaded()76 unsigned bytesLoaded() const { return m_bytesLoaded; } totalBytes()77 unsigned totalBytes() const { return m_totalBytes; } errorCode()78 int errorCode() const { return m_errorCode; } 79 80 void setEncoding(const String&); setDataType(const String & dataType)81 void setDataType(const String& dataType) { m_dataType = dataType; } 82 83 private: 84 void terminate(); 85 void cleanup(); 86 void failed(int errorCode); 87 void convertToText(); 88 void convertToDataURL(); 89 90 bool isCompleted() const; 91 92 static FileError::ErrorCode httpStatusCodeToErrorCode(int); 93 94 ReadType m_readType; 95 FileReaderLoaderClient* m_client; 96 TextEncoding m_encoding; 97 String m_dataType; 98 99 KURL m_urlForReading; 100 RefPtr<ThreadableLoader> m_loader; 101 102 RefPtr<ArrayBuffer> m_rawData; 103 bool m_isRawDataConverted; 104 105 String m_stringResult; 106 107 // The decoder used to decode the text data. 108 RefPtr<TextResourceDecoder> m_decoder; 109 110 unsigned m_bytesLoaded; 111 unsigned m_totalBytes; 112 int m_errorCode; 113 }; 114 115 } // namespace WebCore 116 117 #endif // ENABLE(BLOB) 118 119 #endif // FileReaderLoader_h 120