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@8:92b57208ab99, 2013-03-06 (annotated)

Committer:
rrajan8
Date:
Wed Mar 06 19:07:23 2013 +0000
Revision:
8:92b57208ab99
Parent:
0:ac1725ba162c 
This project utilizes mbed's networking features to display live traffic updates on the Nokia LCD using the MapQuest API's Traffic Web Service.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
segundo 0:ac1725ba162c 1
segundo 0:ac1725ba162c 2 /*
segundo 0:ac1725ba162c 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
segundo 0:ac1725ba162c 4
segundo 0:ac1725ba162c 5 Permission is hereby granted, free of charge, to any person obtaining a copy
segundo 0:ac1725ba162c 6 of this software and associated documentation files (the "Software"), to deal
segundo 0:ac1725ba162c 7 in the Software without restriction, including without limitation the rights
segundo 0:ac1725ba162c 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
segundo 0:ac1725ba162c 9 copies of the Software, and to permit persons to whom the Software is
segundo 0:ac1725ba162c 10 furnished to do so, subject to the following conditions:
segundo 0:ac1725ba162c 11
segundo 0:ac1725ba162c 12 The above copyright notice and this permission notice shall be included in
segundo 0:ac1725ba162c 13 all copies or substantial portions of the Software.
segundo 0:ac1725ba162c 14
segundo 0:ac1725ba162c 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
segundo 0:ac1725ba162c 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
segundo 0:ac1725ba162c 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
segundo 0:ac1725ba162c 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
segundo 0:ac1725ba162c 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
segundo 0:ac1725ba162c 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
segundo 0:ac1725ba162c 21 THE SOFTWARE.
segundo 0:ac1725ba162c 22 */
segundo 0:ac1725ba162c 23
segundo 0:ac1725ba162c 24 #include "HTTPFile.h"
segundo 0:ac1725ba162c 25
segundo 0:ac1725ba162c 26 //#define __DEBUG
segundo 0:ac1725ba162c 27 #include "dbg/dbg.h"
segundo 0:ac1725ba162c 28
segundo 0:ac1725ba162c 29 HTTPFile::HTTPFile(const char* path) : HTTPData(), m_fp(NULL), m_path(path), m_len(0), m_chunked(false)
segundo 0:ac1725ba162c 30 {
segundo 0:ac1725ba162c 31
segundo 0:ac1725ba162c 32 }
segundo 0:ac1725ba162c 33
segundo 0:ac1725ba162c 34 HTTPFile::~HTTPFile()
segundo 0:ac1725ba162c 35 {
segundo 0:ac1725ba162c 36 closeFile();
segundo 0:ac1725ba162c 37 }
segundo 0:ac1725ba162c 38
segundo 0:ac1725ba162c 39 void HTTPFile::clear()
segundo 0:ac1725ba162c 40 {
segundo 0:ac1725ba162c 41 closeFile();
segundo 0:ac1725ba162c 42 //Force reopening
segundo 0:ac1725ba162c 43 }
segundo 0:ac1725ba162c 44
segundo 0:ac1725ba162c 45 int HTTPFile::read(char* buf, int len)
segundo 0:ac1725ba162c 46 {
segundo 0:ac1725ba162c 47 if(!openFile("r")) //File does not exist, or I/O error...
segundo 0:ac1725ba162c 48 return 0;
segundo 0:ac1725ba162c 49 len = fread(buf, 1, len, m_fp);
segundo 0:ac1725ba162c 50 if( feof(m_fp) )
segundo 0:ac1725ba162c 51 {
segundo 0:ac1725ba162c 52 //File read completely, we can close it
segundo 0:ac1725ba162c 53 closeFile();
segundo 0:ac1725ba162c 54 }
segundo 0:ac1725ba162c 55 return len;
segundo 0:ac1725ba162c 56 }
segundo 0:ac1725ba162c 57
segundo 0:ac1725ba162c 58 int HTTPFile::write(const char* buf, int len)
segundo 0:ac1725ba162c 59 {
segundo 0:ac1725ba162c 60 if(!openFile("w")) //File does not exist, or I/O error...
segundo 0:ac1725ba162c 61 return 0;
segundo 0:ac1725ba162c 62 len = fwrite(buf, 1, len, m_fp);
segundo 0:ac1725ba162c 63 DBG("Written %d bytes in %d\n", len, m_fp);
segundo 0:ac1725ba162c 64 if( (!m_chunked && (ftell(m_fp) >= m_len)) ||
segundo 0:ac1725ba162c 65 (m_chunked && !len) )
segundo 0:ac1725ba162c 66 {
segundo 0:ac1725ba162c 67 //File received completely, we can close it
segundo 0:ac1725ba162c 68 closeFile();
segundo 0:ac1725ba162c 69 }
segundo 0:ac1725ba162c 70 return len;
segundo 0:ac1725ba162c 71 }
segundo 0:ac1725ba162c 72
segundo 0:ac1725ba162c 73 string HTTPFile::getDataType() //Internet media type for Content-Type header
segundo 0:ac1725ba162c 74 {
segundo 0:ac1725ba162c 75 return ""; //Unknown
segundo 0:ac1725ba162c 76 }
segundo 0:ac1725ba162c 77
segundo 0:ac1725ba162c 78 void HTTPFile::setDataType(const string& type) //Internet media type from Content-Type header
segundo 0:ac1725ba162c 79 {
segundo 0:ac1725ba162c 80 //Do not really care here
segundo 0:ac1725ba162c 81 }
segundo 0:ac1725ba162c 82
segundo 0:ac1725ba162c 83 bool HTTPFile::getIsChunked() //For Transfer-Encoding header
segundo 0:ac1725ba162c 84 {
segundo 0:ac1725ba162c 85 return false;
segundo 0:ac1725ba162c 86 }
segundo 0:ac1725ba162c 87
segundo 0:ac1725ba162c 88 void HTTPFile::setIsChunked(bool chunked) //From Transfer-Encoding header
segundo 0:ac1725ba162c 89 {
segundo 0:ac1725ba162c 90 m_chunked = chunked;
segundo 0:ac1725ba162c 91 }
segundo 0:ac1725ba162c 92
segundo 0:ac1725ba162c 93 int HTTPFile::getDataLen() //For Content-Length header
segundo 0:ac1725ba162c 94 {
segundo 0:ac1725ba162c 95 return m_len;
segundo 0:ac1725ba162c 96 }
segundo 0:ac1725ba162c 97
segundo 0:ac1725ba162c 98 void HTTPFile::setDataLen(int len) //From Content-Length header, or if the transfer is chunked, next chunk length
segundo 0:ac1725ba162c 99 {
segundo 0:ac1725ba162c 100 if(!m_chunked)
segundo 0:ac1725ba162c 101 m_len = len; //Useful so that we can close file when last byte is written
segundo 0:ac1725ba162c 102 }
segundo 0:ac1725ba162c 103
segundo 0:ac1725ba162c 104 bool HTTPFile::openFile(const char* mode) //true on success, false otherwise
segundo 0:ac1725ba162c 105 {
segundo 0:ac1725ba162c 106 if(m_fp)
segundo 0:ac1725ba162c 107 return true;
segundo 0:ac1725ba162c 108
segundo 0:ac1725ba162c 109 m_fp = fopen(m_path.c_str(), mode);
segundo 0:ac1725ba162c 110 if(m_fp && mode[0]=='r')
segundo 0:ac1725ba162c 111 {
segundo 0:ac1725ba162c 112 //Seek EOF to get length
segundo 0:ac1725ba162c 113 fseek(m_fp, 0, SEEK_END);
segundo 0:ac1725ba162c 114 m_len = ftell(m_fp);
segundo 0:ac1725ba162c 115 fseek(m_fp, 0, SEEK_SET); //Goto SOF
segundo 0:ac1725ba162c 116 }
segundo 0:ac1725ba162c 117
segundo 0:ac1725ba162c 118 DBG("fd = %d\n", m_fp);
segundo 0:ac1725ba162c 119
segundo 0:ac1725ba162c 120 if(!m_fp)
segundo 0:ac1725ba162c 121 return false;
segundo 0:ac1725ba162c 122
segundo 0:ac1725ba162c 123 return true;
segundo 0:ac1725ba162c 124 }
segundo 0:ac1725ba162c 125
segundo 0:ac1725ba162c 126 void HTTPFile::closeFile()
segundo 0:ac1725ba162c 127 {
segundo 0:ac1725ba162c 128 if(m_fp)
segundo 0:ac1725ba162c 129 fclose(m_fp);
segundo 0:ac1725ba162c 130 }