Rahol Rajan / NetServices-Traffic

Used in Live Traffic Update Nokia LCD Display Project

Fork of NetServices by Segundo Equipo

services/http/client/data/HTTPFile.cpp@0:ac1725ba162c, 2010-11-09 (annotated)

Committer:
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Date:
Tue Nov 09 20:54:15 2010 +0000
Revision:
0:ac1725ba162c

        

        
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/*





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Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)





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     4

 





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Permission is hereby granted, free of charge, to any person obtaining a copy





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of this software and associated documentation files (the "Software"), to deal





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in the Software without restriction, including without limitation the rights





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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell





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copies of the Software, and to permit persons to whom the Software is





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furnished to do so, subject to the following conditions:





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    11

 





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The above copyright notice and this permission notice shall be included in





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all copies or substantial portions of the Software.





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    14

 





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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR





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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,





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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE





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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER





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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,





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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN





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THE SOFTWARE.





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*/





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#include "HTTPFile.h"





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//#define __DEBUG





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#include "dbg/dbg.h"





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HTTPFile::HTTPFile(const char* path) : HTTPData(), m_fp(NULL), m_path(path), m_len(0), m_chunked(false)





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{





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}





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HTTPFile::~HTTPFile()





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{





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  closeFile();





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}





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void HTTPFile::clear()





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{





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  closeFile();





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  //Force reopening





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}





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int HTTPFile::read(char* buf, int len)





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{





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  if(!openFile("r")) //File does not exist, or I/O error...





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    return 0;





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  len = fread(buf, 1, len, m_fp);





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  if( feof(m_fp) )





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  {





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    //File read completely, we can close it





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    closeFile();





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  }





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  return len;





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}





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int HTTPFile::write(const char* buf, int len)





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{





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  if(!openFile("w")) //File does not exist, or I/O error...





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    return 0;





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  len = fwrite(buf, 1, len, m_fp);





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  DBG("Written %d bytes in %d\n", len, m_fp);





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  if( (!m_chunked && (ftell(m_fp) >= m_len)) ||





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      (m_chunked && !len) )





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  {





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    //File received completely, we can close it





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    closeFile();





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  }





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  return len;





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}





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string HTTPFile::getDataType() //Internet media type for Content-Type header





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{





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  return ""; //Unknown





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}





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void HTTPFile::setDataType(const string& type) //Internet media type from Content-Type header





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{





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  //Do not really care here





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}





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bool HTTPFile::getIsChunked() //For Transfer-Encoding header





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{





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  return false;





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}





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void HTTPFile::setIsChunked(bool chunked) //From Transfer-Encoding header





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{





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  m_chunked = chunked;





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}





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int HTTPFile::getDataLen() //For Content-Length header





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{





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  return m_len;





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}





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void HTTPFile::setDataLen(int len) //From Content-Length header, or if the transfer is chunked, next chunk length





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{





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  if(!m_chunked)





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    m_len = len; //Useful so that we can close file when last byte is written





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}





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bool HTTPFile::openFile(const char* mode) //true on success, false otherwise





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{





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  if(m_fp) 





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    return true;





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  m_fp = fopen(m_path.c_str(), mode);





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  if(m_fp && mode[0]=='r')





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  {





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    //Seek EOF to get length





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    fseek(m_fp, 0, SEEK_END);





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    m_len = ftell(m_fp);





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    fseek(m_fp, 0, SEEK_SET); //Goto SOF





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  }





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  DBG("fd = %d\n", m_fp);





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  if(!m_fp) 





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    return false;





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  return true;





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}





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void HTTPFile::closeFile()





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{





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  if(m_fp)





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    fclose(m_fp);





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}