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Embedded C project:18/12/2014
Dependencies: DS1307 TextLCD mbed
Diff: NetServices/services/http/client/data/HTTPFile.cpp
- Revision:
- 0:8d87bc453349
diff -r 000000000000 -r 8d87bc453349 NetServices/services/http/client/data/HTTPFile.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NetServices/services/http/client/data/HTTPFile.cpp Thu Dec 18 09:35:49 2014 +0000 @@ -0,0 +1,130 @@ + +/* +Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +#include "HTTPFile.h" + +//#define __DEBUG +#include "dbg/dbg.h" + +HTTPFile::HTTPFile(const char* path) : HTTPData(), m_fp(NULL), m_path(path), m_len(0), m_chunked(false) +{ + +} + +HTTPFile::~HTTPFile() +{ + closeFile(); +} + +void HTTPFile::clear() +{ + closeFile(); + //Force reopening +} + +int HTTPFile::read(char* buf, int len) +{ + if(!openFile("r")) //File does not exist, or I/O error... + return 0; + len = fread(buf, 1, len, m_fp); + if( feof(m_fp) ) + { + //File read completely, we can close it + closeFile(); + } + return len; +} + +int HTTPFile::write(const char* buf, int len) +{ + if(!openFile("w")) //File does not exist, or I/O error... + return 0; + len = fwrite(buf, 1, len, m_fp); + DBG("Written %d bytes in %d\n", len, m_fp); + if( (!m_chunked && (ftell(m_fp) >= m_len)) || + (m_chunked && !len) ) + { + //File received completely, we can close it + closeFile(); + } + return len; +} + +string HTTPFile::getDataType() //Internet media type for Content-Type header +{ + return ""; //Unknown +} + +void HTTPFile::setDataType(const string& type) //Internet media type from Content-Type header +{ + //Do not really care here +} + +bool HTTPFile::getIsChunked() //For Transfer-Encoding header +{ + return false; +} + +void HTTPFile::setIsChunked(bool chunked) //From Transfer-Encoding header +{ + m_chunked = chunked; +} + +int HTTPFile::getDataLen() //For Content-Length header +{ + return m_len; +} + +void HTTPFile::setDataLen(int len) //From Content-Length header, or if the transfer is chunked, next chunk length +{ + if(!m_chunked) + m_len = len; //Useful so that we can close file when last byte is written +} + +bool HTTPFile::openFile(const char* mode) //true on success, false otherwise +{ + if(m_fp) + return true; + + m_fp = fopen(m_path.c_str(), mode); + if(m_fp && mode[0]=='r') + { + //Seek EOF to get length + fseek(m_fp, 0, SEEK_END); + m_len = ftell(m_fp); + fseek(m_fp, 0, SEEK_SET); //Goto SOF + } + + DBG("fd = %d\n", m_fp); + + if(!m_fp) + return false; + + return true; +} + +void HTTPFile::closeFile() +{ + if(m_fp) + fclose(m_fp); +}