Satoshi Togawa / Mbed 2 deprecated mpod_picasa_photoframe

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Dependencies:   BlinkLed HTTPClient EthernetInterface FatFileSystemCpp MSCFileSystem mbed-rtos mbed

HTTPFile.cpp@0:dfd5cfea7112, 2012-08-22 (annotated)

Committer:
togayan
Date:
Wed Aug 22 16:00:38 2012 +0000
Revision:
0:dfd5cfea7112
Child:
6:83383116c88a
1st version of mpod_picasa_photoframe

Who changed what in which revision?

UserRevisionLine numberNew contents of line
togayan 0:dfd5cfea7112 1 /* HTTPFile.cpp */
togayan 0:dfd5cfea7112 2 #include "HTTPFile.h"
togayan 0:dfd5cfea7112 3
togayan 0:dfd5cfea7112 4 #include <cstring>
togayan 0:dfd5cfea7112 5
togayan 0:dfd5cfea7112 6 #define OK 0
togayan 0:dfd5cfea7112 7 #define NG -1
togayan 0:dfd5cfea7112 8
togayan 0:dfd5cfea7112 9 using std::memcpy;
togayan 0:dfd5cfea7112 10 using std::strncpy;
togayan 0:dfd5cfea7112 11 using std::strlen;
togayan 0:dfd5cfea7112 12
togayan 0:dfd5cfea7112 13 HTTPFile::HTTPFile(const char* path) :
togayan 0:dfd5cfea7112 14 m_fp(NULL),
togayan 0:dfd5cfea7112 15 m_path(path),
togayan 0:dfd5cfea7112 16 m_len(0),
togayan 0:dfd5cfea7112 17 m_chunked(false)
togayan 0:dfd5cfea7112 18 {
togayan 0:dfd5cfea7112 19 }
togayan 0:dfd5cfea7112 20
togayan 0:dfd5cfea7112 21 HTTPFile::~HTTPFile()
togayan 0:dfd5cfea7112 22 {
togayan 0:dfd5cfea7112 23 closeFile();
togayan 0:dfd5cfea7112 24 }
togayan 0:dfd5cfea7112 25
togayan 0:dfd5cfea7112 26 void HTTPFile::clear()
togayan 0:dfd5cfea7112 27 {
togayan 0:dfd5cfea7112 28 closeFile();
togayan 0:dfd5cfea7112 29 //Force reopening
togayan 0:dfd5cfea7112 30 }
togayan 0:dfd5cfea7112 31
togayan 0:dfd5cfea7112 32 /*virtual*/ int HTTPFile::read(char* buf, size_t len, size_t* pReadLen)
togayan 0:dfd5cfea7112 33 {
togayan 0:dfd5cfea7112 34 if(!openFile("r")) //File does not exist, or I/O error...
togayan 0:dfd5cfea7112 35 return NG;
togayan 0:dfd5cfea7112 36
togayan 0:dfd5cfea7112 37 *pReadLen = fread(buf, 1, len, m_fp);
togayan 0:dfd5cfea7112 38 if( feof(m_fp) )
togayan 0:dfd5cfea7112 39 {
togayan 0:dfd5cfea7112 40 //File read completely, we can close it
togayan 0:dfd5cfea7112 41 closeFile();
togayan 0:dfd5cfea7112 42 }
togayan 0:dfd5cfea7112 43 return OK;
togayan 0:dfd5cfea7112 44 }
togayan 0:dfd5cfea7112 45
togayan 0:dfd5cfea7112 46 /*virtual*/ int HTTPFile::write(const char* buf, size_t len)
togayan 0:dfd5cfea7112 47 {
togayan 0:dfd5cfea7112 48 if(!openFile("w")) //File does not exist, or I/O error...
togayan 0:dfd5cfea7112 49 return NG;
togayan 0:dfd5cfea7112 50
togayan 0:dfd5cfea7112 51 len = fwrite(buf, 1, len, m_fp);
togayan 0:dfd5cfea7112 52 //DBG("Written %d bytes in %d\n", len, m_fp);
togayan 0:dfd5cfea7112 53 if( (!m_chunked && (ftell(m_fp) >= m_len)) || (m_chunked && !len) )
togayan 0:dfd5cfea7112 54 {
togayan 0:dfd5cfea7112 55 //File received completely, we can close it
togayan 0:dfd5cfea7112 56 closeFile();
togayan 0:dfd5cfea7112 57 }
togayan 0:dfd5cfea7112 58 return len;
togayan 0:dfd5cfea7112 59 }
togayan 0:dfd5cfea7112 60
togayan 0:dfd5cfea7112 61 /*virtual*/ int HTTPFile::getDataType(char* type, size_t maxTypeLen) //Internet media type for Content-Type header
togayan 0:dfd5cfea7112 62 {
togayan 0:dfd5cfea7112 63 strncpy(type, "text/plain", maxTypeLen-1);
togayan 0:dfd5cfea7112 64 type[maxTypeLen-1] = '\0';
togayan 0:dfd5cfea7112 65 return OK;
togayan 0:dfd5cfea7112 66 }
togayan 0:dfd5cfea7112 67
togayan 0:dfd5cfea7112 68 /*virtual*/ void HTTPFile::setDataType(const char* type) //Internet media type from Content-Type header
togayan 0:dfd5cfea7112 69 {
togayan 0:dfd5cfea7112 70 //Do not really care here
togayan 0:dfd5cfea7112 71 }
togayan 0:dfd5cfea7112 72
togayan 0:dfd5cfea7112 73 /*virtual*/ bool HTTPFile::getIsChunked() //For Transfer-Encoding header
togayan 0:dfd5cfea7112 74 {
togayan 0:dfd5cfea7112 75 return false;
togayan 0:dfd5cfea7112 76 }
togayan 0:dfd5cfea7112 77
togayan 0:dfd5cfea7112 78 /*virtual*/ void HTTPFile::setIsChunked(bool chunked) //For Transfer-Encoding header
togayan 0:dfd5cfea7112 79 {
togayan 0:dfd5cfea7112 80 m_chunked = chunked;
togayan 0:dfd5cfea7112 81 }
togayan 0:dfd5cfea7112 82
togayan 0:dfd5cfea7112 83 /*virtual*/ size_t HTTPFile::getDataLen() //For Content-Length header
togayan 0:dfd5cfea7112 84 {
togayan 0:dfd5cfea7112 85 return m_len;
togayan 0:dfd5cfea7112 86 }
togayan 0:dfd5cfea7112 87
togayan 0:dfd5cfea7112 88 /*virtual*/ void HTTPFile::setDataLen(size_t len) //For Content-Length header, or if the transfer is chunked, next chunk length
togayan 0:dfd5cfea7112 89 {
togayan 0:dfd5cfea7112 90 if(!m_chunked)
togayan 0:dfd5cfea7112 91 m_len = len; //Useful so that we can close file when last byte is written
togayan 0:dfd5cfea7112 92 }
togayan 0:dfd5cfea7112 93
togayan 0:dfd5cfea7112 94 bool HTTPFile::openFile(const char* mode) //true on success, false otherwise
togayan 0:dfd5cfea7112 95 {
togayan 0:dfd5cfea7112 96 if(m_fp)
togayan 0:dfd5cfea7112 97 return true;
togayan 0:dfd5cfea7112 98
togayan 0:dfd5cfea7112 99 m_fp = fopen(m_path.c_str(), mode);
togayan 0:dfd5cfea7112 100 if(m_fp && mode[0]=='r')
togayan 0:dfd5cfea7112 101 {
togayan 0:dfd5cfea7112 102 //Seek EOF to get length
togayan 0:dfd5cfea7112 103 fseek(m_fp, 0, SEEK_END);
togayan 0:dfd5cfea7112 104 m_len = ftell(m_fp);
togayan 0:dfd5cfea7112 105 fseek(m_fp, 0, SEEK_SET); //Goto SOF
togayan 0:dfd5cfea7112 106 }
togayan 0:dfd5cfea7112 107
togayan 0:dfd5cfea7112 108 //DBG("fd = %d\n", m_fp);
togayan 0:dfd5cfea7112 109
togayan 0:dfd5cfea7112 110 if(!m_fp)
togayan 0:dfd5cfea7112 111 return false;
togayan 0:dfd5cfea7112 112
togayan 0:dfd5cfea7112 113 return true;
togayan 0:dfd5cfea7112 114 }
togayan 0:dfd5cfea7112 115
togayan 0:dfd5cfea7112 116 void HTTPFile::closeFile()
togayan 0:dfd5cfea7112 117 {
togayan 0:dfd5cfea7112 118 if(m_fp)
togayan 0:dfd5cfea7112 119 fclose(m_fp);
togayan 0:dfd5cfea7112 120 }