Dirk-Willem van Gulik (NXP/mbed)
Example self-announcing webserver which controls a servo through a smallHTML userinterface.
services/http/client/data/HTTPFile.cpp@0:a259777c45a3, 2010-08-14 (annotated)
- Committer:
- dirkx
- Date:
- Sat Aug 14 15:56:01 2010 +0000
- Revision:
- 0:a259777c45a3
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| dirkx | 0:a259777c45a3 | 1 | |
| dirkx | 0:a259777c45a3 | 2 | /* |
| dirkx | 0:a259777c45a3 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| dirkx | 0:a259777c45a3 | 4 | |
| dirkx | 0:a259777c45a3 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| dirkx | 0:a259777c45a3 | 6 | of this software and associated documentation files (the "Software"), to deal |
| dirkx | 0:a259777c45a3 | 7 | in the Software without restriction, including without limitation the rights |
| dirkx | 0:a259777c45a3 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| dirkx | 0:a259777c45a3 | 9 | copies of the Software, and to permit persons to whom the Software is |
| dirkx | 0:a259777c45a3 | 10 | furnished to do so, subject to the following conditions: |
| dirkx | 0:a259777c45a3 | 11 | |
| dirkx | 0:a259777c45a3 | 12 | The above copyright notice and this permission notice shall be included in |
| dirkx | 0:a259777c45a3 | 13 | all copies or substantial portions of the Software. |
| dirkx | 0:a259777c45a3 | 14 | |
| dirkx | 0:a259777c45a3 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| dirkx | 0:a259777c45a3 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| dirkx | 0:a259777c45a3 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| dirkx | 0:a259777c45a3 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| dirkx | 0:a259777c45a3 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| dirkx | 0:a259777c45a3 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| dirkx | 0:a259777c45a3 | 21 | THE SOFTWARE. |
| dirkx | 0:a259777c45a3 | 22 | */ |
| dirkx | 0:a259777c45a3 | 23 | |
| dirkx | 0:a259777c45a3 | 24 | #include "HTTPFile.h" |
| dirkx | 0:a259777c45a3 | 25 | |
| dirkx | 0:a259777c45a3 | 26 | HTTPFile::HTTPFile(const char* path) : HTTPData(), m_fp(NULL), m_path(path), m_len(0), m_chunked(false) |
| dirkx | 0:a259777c45a3 | 27 | { |
| dirkx | 0:a259777c45a3 | 28 | |
| dirkx | 0:a259777c45a3 | 29 | } |
| dirkx | 0:a259777c45a3 | 30 | |
| dirkx | 0:a259777c45a3 | 31 | HTTPFile::~HTTPFile() |
| dirkx | 0:a259777c45a3 | 32 | { |
| dirkx | 0:a259777c45a3 | 33 | closeFile(); |
| dirkx | 0:a259777c45a3 | 34 | } |
| dirkx | 0:a259777c45a3 | 35 | |
| dirkx | 0:a259777c45a3 | 36 | void HTTPFile::clear() |
| dirkx | 0:a259777c45a3 | 37 | { |
| dirkx | 0:a259777c45a3 | 38 | closeFile(); |
| dirkx | 0:a259777c45a3 | 39 | //Force reopening |
| dirkx | 0:a259777c45a3 | 40 | } |
| dirkx | 0:a259777c45a3 | 41 | |
| dirkx | 0:a259777c45a3 | 42 | int HTTPFile::read(char* buf, int len) |
| dirkx | 0:a259777c45a3 | 43 | { |
| dirkx | 0:a259777c45a3 | 44 | if(!openFile("r")) //File does not exist, or I/O error... |
| dirkx | 0:a259777c45a3 | 45 | return 0; |
| dirkx | 0:a259777c45a3 | 46 | len = fread(buf, 1, len, m_fp); |
| dirkx | 0:a259777c45a3 | 47 | if( feof(m_fp) ) |
| dirkx | 0:a259777c45a3 | 48 | { |
| dirkx | 0:a259777c45a3 | 49 | //File read completely, we can close it |
| dirkx | 0:a259777c45a3 | 50 | closeFile(); |
| dirkx | 0:a259777c45a3 | 51 | } |
| dirkx | 0:a259777c45a3 | 52 | return len; |
| dirkx | 0:a259777c45a3 | 53 | } |
| dirkx | 0:a259777c45a3 | 54 | |
| dirkx | 0:a259777c45a3 | 55 | int HTTPFile::write(const char* buf, int len) |
| dirkx | 0:a259777c45a3 | 56 | { |
| dirkx | 0:a259777c45a3 | 57 | if(!openFile("w")) //File does not exist, or I/O error... |
| dirkx | 0:a259777c45a3 | 58 | return 0; |
| dirkx | 0:a259777c45a3 | 59 | len = fwrite(buf, 1, len, m_fp); |
| dirkx | 0:a259777c45a3 | 60 | if( (!m_chunked && (ftell(m_fp) >= m_len)) || |
| dirkx | 0:a259777c45a3 | 61 | (m_chunked && !len) ) |
| dirkx | 0:a259777c45a3 | 62 | { |
| dirkx | 0:a259777c45a3 | 63 | //File received completely, we can close it |
| dirkx | 0:a259777c45a3 | 64 | closeFile(); |
| dirkx | 0:a259777c45a3 | 65 | } |
| dirkx | 0:a259777c45a3 | 66 | return len; |
| dirkx | 0:a259777c45a3 | 67 | } |
| dirkx | 0:a259777c45a3 | 68 | |
| dirkx | 0:a259777c45a3 | 69 | string HTTPFile::getDataType() //Internet media type for Content-Type header |
| dirkx | 0:a259777c45a3 | 70 | { |
| dirkx | 0:a259777c45a3 | 71 | return ""; //Unknown |
| dirkx | 0:a259777c45a3 | 72 | } |
| dirkx | 0:a259777c45a3 | 73 | |
| dirkx | 0:a259777c45a3 | 74 | void HTTPFile::setDataType(const string& type) //Internet media type from Content-Type header |
| dirkx | 0:a259777c45a3 | 75 | { |
| dirkx | 0:a259777c45a3 | 76 | //Do not really care here |
| dirkx | 0:a259777c45a3 | 77 | } |
| dirkx | 0:a259777c45a3 | 78 | |
| dirkx | 0:a259777c45a3 | 79 | bool HTTPFile::getIsChunked() //For Transfer-Encoding header |
| dirkx | 0:a259777c45a3 | 80 | { |
| dirkx | 0:a259777c45a3 | 81 | return false; |
| dirkx | 0:a259777c45a3 | 82 | } |
| dirkx | 0:a259777c45a3 | 83 | |
| dirkx | 0:a259777c45a3 | 84 | void HTTPFile::setIsChunked(bool chunked) //From Transfer-Encoding header |
| dirkx | 0:a259777c45a3 | 85 | { |
| dirkx | 0:a259777c45a3 | 86 | m_chunked = chunked; |
| dirkx | 0:a259777c45a3 | 87 | } |
| dirkx | 0:a259777c45a3 | 88 | |
| dirkx | 0:a259777c45a3 | 89 | int HTTPFile::getDataLen() //For Content-Length header |
| dirkx | 0:a259777c45a3 | 90 | { |
| dirkx | 0:a259777c45a3 | 91 | return m_len; |
| dirkx | 0:a259777c45a3 | 92 | } |
| dirkx | 0:a259777c45a3 | 93 | |
| dirkx | 0:a259777c45a3 | 94 | void HTTPFile::setDataLen(int len) //From Content-Length header, or if the transfer is chunked, next chunk length |
| dirkx | 0:a259777c45a3 | 95 | { |
| dirkx | 0:a259777c45a3 | 96 | if(!m_chunked) |
| dirkx | 0:a259777c45a3 | 97 | m_len = len; //Useful so that we can close file when last byte is written |
| dirkx | 0:a259777c45a3 | 98 | } |
| dirkx | 0:a259777c45a3 | 99 | |
| dirkx | 0:a259777c45a3 | 100 | bool HTTPFile::openFile(const char* mode) //true on success, false otherwise |
| dirkx | 0:a259777c45a3 | 101 | { |
| dirkx | 0:a259777c45a3 | 102 | if(m_fp) |
| dirkx | 0:a259777c45a3 | 103 | return true; |
| dirkx | 0:a259777c45a3 | 104 | |
| dirkx | 0:a259777c45a3 | 105 | m_fp = fopen(m_path.c_str(), mode); |
| dirkx | 0:a259777c45a3 | 106 | if(m_fp && mode[0]=='r') |
| dirkx | 0:a259777c45a3 | 107 | { |
| dirkx | 0:a259777c45a3 | 108 | //Seek EOF to get length |
| dirkx | 0:a259777c45a3 | 109 | fseek(m_fp, 0, SEEK_END); |
| dirkx | 0:a259777c45a3 | 110 | m_len = ftell(m_fp); |
| dirkx | 0:a259777c45a3 | 111 | fseek(m_fp, 0, SEEK_SET); //Goto SOF |
| dirkx | 0:a259777c45a3 | 112 | } |
| dirkx | 0:a259777c45a3 | 113 | |
| dirkx | 0:a259777c45a3 | 114 | if(!m_fp) |
| dirkx | 0:a259777c45a3 | 115 | return false; |
| dirkx | 0:a259777c45a3 | 116 | |
| dirkx | 0:a259777c45a3 | 117 | return true; |
| dirkx | 0:a259777c45a3 | 118 | } |
| dirkx | 0:a259777c45a3 | 119 | |
| dirkx | 0:a259777c45a3 | 120 | void HTTPFile::closeFile() |
| dirkx | 0:a259777c45a3 | 121 | { |
| dirkx | 0:a259777c45a3 | 122 | if(m_fp) |
| dirkx | 0:a259777c45a3 | 123 | fclose(m_fp); |
| dirkx | 0:a259777c45a3 | 124 | } |