Lorcan Smith
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Enet_SPI
SNMP agent attached to SPI slave
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HTTPFile.cpp
00001 00002 /* 00003 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) 00004 00005 Permission is hereby granted, free of charge, to any person obtaining a copy 00006 of this software and associated documentation files (the "Software"), to deal 00007 in the Software without restriction, including without limitation the rights 00008 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00009 copies of the Software, and to permit persons to whom the Software is 00010 furnished to do so, subject to the following conditions: 00011 00012 The above copyright notice and this permission notice shall be included in 00013 all copies or substantial portions of the Software. 00014 00015 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00016 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00017 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00018 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00019 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00020 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00021 THE SOFTWARE. 00022 */ 00023 00024 #include "HTTPFile.h" 00025 00026 //#define __DEBUG 00027 #include "dbg/dbg.h" 00028 00029 HTTPFile::HTTPFile(const char* path) : HTTPData(), m_fp(NULL), m_path(path), m_len(0), m_chunked(false) 00030 { 00031 00032 } 00033 00034 HTTPFile::~HTTPFile() 00035 { 00036 closeFile(); 00037 } 00038 00039 void HTTPFile::clear() 00040 { 00041 closeFile(); 00042 //Force reopening 00043 } 00044 00045 int HTTPFile::read(char* buf, int len) 00046 { 00047 if(!openFile("r")) //File does not exist, or I/O error... 00048 return 0; 00049 len = fread(buf, 1, len, m_fp); 00050 if( feof(m_fp) ) 00051 { 00052 //File read completely, we can close it 00053 closeFile(); 00054 } 00055 return len; 00056 } 00057 00058 int HTTPFile::write(const char* buf, int len) 00059 { 00060 if(!openFile("w")) //File does not exist, or I/O error... 00061 return 0; 00062 len = fwrite(buf, 1, len, m_fp); 00063 DBG("Written %d bytes in %d\n", len, m_fp); 00064 if( (!m_chunked && (ftell(m_fp) >= m_len)) || 00065 (m_chunked && !len) ) 00066 { 00067 //File received completely, we can close it 00068 closeFile(); 00069 } 00070 return len; 00071 } 00072 00073 string HTTPFile::getDataType() //Internet media type for Content-Type header 00074 { 00075 return ""; //Unknown 00076 } 00077 00078 void HTTPFile::setDataType(const string& type) //Internet media type from Content-Type header 00079 { 00080 //Do not really care here 00081 } 00082 00083 bool HTTPFile::getIsChunked() //For Transfer-Encoding header 00084 { 00085 return false; 00086 } 00087 00088 void HTTPFile::setIsChunked(bool chunked) //From Transfer-Encoding header 00089 { 00090 m_chunked = chunked; 00091 } 00092 00093 int HTTPFile::getDataLen() //For Content-Length header 00094 { 00095 return m_len; 00096 } 00097 00098 void HTTPFile::setDataLen(int len) //From Content-Length header, or if the transfer is chunked, next chunk length 00099 { 00100 if(!m_chunked) 00101 m_len = len; //Useful so that we can close file when last byte is written 00102 } 00103 00104 bool HTTPFile::openFile(const char* mode) //true on success, false otherwise 00105 { 00106 if(m_fp) 00107 return true; 00108 00109 m_fp = fopen(m_path.c_str(), mode); 00110 if(m_fp && mode[0]=='r') 00111 { 00112 //Seek EOF to get length 00113 fseek(m_fp, 0, SEEK_END); 00114 m_len = ftell(m_fp); 00115 fseek(m_fp, 0, SEEK_SET); //Goto SOF 00116 } 00117 00118 DBG("fd = %d\n", m_fp); 00119 00120 if(!m_fp) 00121 return false; 00122 00123 return true; 00124 } 00125 00126 void HTTPFile::closeFile() 00127 { 00128 if(m_fp) 00129 fclose(m_fp); 00130 }
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