Embedded Artists / DM_HttpServer

Adaptation of the HttpServer by user yueee_yt. This version has improved handling of the HTTP headers (**NOTE**: There are limitations with this implementation and it is not fully functional. Use it only as a starting point.)

Dependents:   DMSupport DMSupport DMSupport DMSupport

Fork of DM_HttpServer by EmbeddedArtists AB

HTTPRequestHandler.cpp@4:1b6b021ee21d, 2014-02-21 (annotated)

Committer:
yueee_yt
Date:
Fri Feb 21 07:10:30 2014 +0000
Revision:
4:1b6b021ee21d
Parent:
0:fdf9c2c5200f
Child:
6:7b3320c34654
BugFix (JavaScript RPC Support (Not Cookbook js))

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yueee_yt 0:fdf9c2c5200f 1 /*
yueee_yt 0:fdf9c2c5200f 2 Permission is hereby granted, free of charge, to any person obtaining a copy
yueee_yt 0:fdf9c2c5200f 3 of this software and associated documentation files (the "Software"), to deal
yueee_yt 0:fdf9c2c5200f 4 in the Software without restriction, including without limitation the rights
yueee_yt 0:fdf9c2c5200f 5 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
yueee_yt 0:fdf9c2c5200f 6 copies of the Software, and to permit persons to whom the Software is
yueee_yt 0:fdf9c2c5200f 7 furnished to do so, subject to the following conditions:
yueee_yt 0:fdf9c2c5200f 8
yueee_yt 0:fdf9c2c5200f 9 The above copyright notice and this permission notice shall be included in
yueee_yt 0:fdf9c2c5200f 10 all copies or substantial portions of the Software.
yueee_yt 0:fdf9c2c5200f 11
yueee_yt 0:fdf9c2c5200f 12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
yueee_yt 0:fdf9c2c5200f 13 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
yueee_yt 0:fdf9c2c5200f 14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
yueee_yt 0:fdf9c2c5200f 15 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
yueee_yt 0:fdf9c2c5200f 16 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
yueee_yt 0:fdf9c2c5200f 17 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
yueee_yt 0:fdf9c2c5200f 18 THE SOFTWARE.
yueee_yt 0:fdf9c2c5200f 19 */
yueee_yt 4:1b6b021ee21d 20 #ifdef _DEBUG_ALL
yueee_yt 4:1b6b021ee21d 21 #define _DEBUG_REQUEST_HANDLER
yueee_yt 4:1b6b021ee21d 22 #endif
yueee_yt 0:fdf9c2c5200f 23
yueee_yt 0:fdf9c2c5200f 24 #include "HTTPRequestHandler.h"
yueee_yt 0:fdf9c2c5200f 25
yueee_yt 0:fdf9c2c5200f 26 #include <string.h>
yueee_yt 0:fdf9c2c5200f 27
yueee_yt 0:fdf9c2c5200f 28 #define HTTP_REQUEST_TIMEOUT 5000
yueee_yt 0:fdf9c2c5200f 29
yueee_yt 0:fdf9c2c5200f 30 //HTTPRequestHandler::HTTPRequestHandler(const char* rootPath, const char* path, TCPSocket* pTCPSocket) : NetService(),
yueee_yt 0:fdf9c2c5200f 31 // m_pTCPSocketConnection(pTCPSocketConnection), m_reqHeaders(), m_respHeaders(),
yueee_yt 0:fdf9c2c5200f 32 // m_rootPath(rootPath), m_path(path), m_errc(200),
yueee_yt 0:fdf9c2c5200f 33 // m_watchdog(), m_timeout(0),**/ m_closed(false), m_headersSent(false) //OK
yueee_yt 0:fdf9c2c5200f 34 HTTPRequestHandler::HTTPRequestHandler(const char* rootPath, const char* path, TCPSocketConnection* pTCPSocketConnection) :
yueee_yt 0:fdf9c2c5200f 35 m_pTCPSocketConnection(pTCPSocketConnection), m_reqHeaders(), m_respHeaders(),
yueee_yt 0:fdf9c2c5200f 36 m_rootPath(rootPath), m_path(path), m_errc(200), m_closed(false), m_headersSent(false)
yueee_yt 0:fdf9c2c5200f 37 {
yueee_yt 4:1b6b021ee21d 38 #ifdef _DEBUG_REQUEST_HANDLER
yueee_yt 0:fdf9c2c5200f 39 printf("+++(HTTPRequestHandler) init \r\n");
yueee_yt 4:1b6b021ee21d 40 #endif
yueee_yt 0:fdf9c2c5200f 41 //Read & parse headers
yueee_yt 0:fdf9c2c5200f 42 readHeaders();
yueee_yt 0:fdf9c2c5200f 43 //* m_pTCPSocket->setOnEvent(this, &HTTPRequestHandler::onTCPSocketEvent);
yueee_yt 0:fdf9c2c5200f 44 //* setTimeout(HTTP_REQUEST_TIMEOUT);
yueee_yt 4:1b6b021ee21d 45 #ifdef _DEBUG_REQUEST_HANDLER
yueee_yt 0:fdf9c2c5200f 46 printf("+++(HTTPRequestHandler) init end \r\n");
yueee_yt 4:1b6b021ee21d 47 #endif
yueee_yt 0:fdf9c2c5200f 48 }
yueee_yt 0:fdf9c2c5200f 49
yueee_yt 0:fdf9c2c5200f 50 HTTPRequestHandler::~HTTPRequestHandler()
yueee_yt 0:fdf9c2c5200f 51 {
yueee_yt 0:fdf9c2c5200f 52 close();
yueee_yt 4:1b6b021ee21d 53 #ifdef _DEBUG_REQUEST_HANDLER
yueee_yt 0:fdf9c2c5200f 54 printf("+++(HTTPRequestHandler) Destroy end\r\n");
yueee_yt 4:1b6b021ee21d 55 #endif
yueee_yt 0:fdf9c2c5200f 56 }
yueee_yt 0:fdf9c2c5200f 57
yueee_yt 0:fdf9c2c5200f 58 void HTTPRequestHandler::onTimeout() //Connection has timed out
yueee_yt 0:fdf9c2c5200f 59 {
yueee_yt 0:fdf9c2c5200f 60 close();
yueee_yt 0:fdf9c2c5200f 61 }
yueee_yt 0:fdf9c2c5200f 62
yueee_yt 0:fdf9c2c5200f 63 void HTTPRequestHandler::close() //Close socket and destroy data
yueee_yt 0:fdf9c2c5200f 64 {
yueee_yt 0:fdf9c2c5200f 65 if(m_closed)
yueee_yt 0:fdf9c2c5200f 66 return;
yueee_yt 0:fdf9c2c5200f 67 m_closed = true; //Prevent recursive calling or calling on an object being destructed by someone else
yueee_yt 0:fdf9c2c5200f 68 /** m_watchdog.detach(); **/
yueee_yt 0:fdf9c2c5200f 69 //* onClose();
yueee_yt 0:fdf9c2c5200f 70 //* m_pTCPSocket->resetOnEvent();
yueee_yt 0:fdf9c2c5200f 71 //* m_pTCPSocket->close();
yueee_yt 0:fdf9c2c5200f 72 //* delete m_pTCPSocket; //Can safely destroy socket
yueee_yt 0:fdf9c2c5200f 73 //* NetService::close();
yueee_yt 0:fdf9c2c5200f 74 }
yueee_yt 0:fdf9c2c5200f 75
yueee_yt 0:fdf9c2c5200f 76 map<string, string>& HTTPRequestHandler::reqHeaders() //const
yueee_yt 0:fdf9c2c5200f 77 {
yueee_yt 0:fdf9c2c5200f 78 return m_reqHeaders;
yueee_yt 0:fdf9c2c5200f 79 }
yueee_yt 0:fdf9c2c5200f 80
yueee_yt 0:fdf9c2c5200f 81 string& HTTPRequestHandler::path() //const
yueee_yt 0:fdf9c2c5200f 82 {
yueee_yt 0:fdf9c2c5200f 83 return m_path;
yueee_yt 0:fdf9c2c5200f 84 }
yueee_yt 0:fdf9c2c5200f 85
yueee_yt 0:fdf9c2c5200f 86 int HTTPRequestHandler::dataLen() const
yueee_yt 0:fdf9c2c5200f 87 {
yueee_yt 0:fdf9c2c5200f 88 map<string,string>::iterator it;
yueee_yt 0:fdf9c2c5200f 89 it = m_reqHeaders.find("Content-Length");
yueee_yt 0:fdf9c2c5200f 90 if( it == m_reqHeaders.end() ) {
yueee_yt 0:fdf9c2c5200f 91 return 0;
yueee_yt 0:fdf9c2c5200f 92 }
yueee_yt 0:fdf9c2c5200f 93 return atoi((*it).second.c_str()); //return 0 if parse fails, so that's fine
yueee_yt 0:fdf9c2c5200f 94 }
yueee_yt 0:fdf9c2c5200f 95
yueee_yt 0:fdf9c2c5200f 96 int HTTPRequestHandler::readData(char* buf, int len)
yueee_yt 0:fdf9c2c5200f 97 {
yueee_yt 0:fdf9c2c5200f 98 return m_pTCPSocketConnection->receive(buf, len);
yueee_yt 0:fdf9c2c5200f 99 }
yueee_yt 0:fdf9c2c5200f 100
yueee_yt 0:fdf9c2c5200f 101 string& HTTPRequestHandler::rootPath() //const
yueee_yt 0:fdf9c2c5200f 102 {
yueee_yt 0:fdf9c2c5200f 103 return m_rootPath;
yueee_yt 0:fdf9c2c5200f 104 }
yueee_yt 0:fdf9c2c5200f 105
yueee_yt 0:fdf9c2c5200f 106 void HTTPRequestHandler::setErrCode(int errc)
yueee_yt 0:fdf9c2c5200f 107 {
yueee_yt 0:fdf9c2c5200f 108 m_errc = errc;
yueee_yt 0:fdf9c2c5200f 109 }
yueee_yt 0:fdf9c2c5200f 110
yueee_yt 0:fdf9c2c5200f 111 void HTTPRequestHandler::setContentLen(int len)
yueee_yt 0:fdf9c2c5200f 112 {
yueee_yt 0:fdf9c2c5200f 113 char len_str[6] = {0};
yueee_yt 0:fdf9c2c5200f 114 sprintf(len_str, "%d", len);
yueee_yt 0:fdf9c2c5200f 115 respHeaders()["Content-Length"] = len_str;
yueee_yt 0:fdf9c2c5200f 116 }
yueee_yt 0:fdf9c2c5200f 117
yueee_yt 0:fdf9c2c5200f 118 map<string, string>& HTTPRequestHandler::respHeaders()
yueee_yt 0:fdf9c2c5200f 119 {
yueee_yt 0:fdf9c2c5200f 120 return m_respHeaders;
yueee_yt 0:fdf9c2c5200f 121 }
yueee_yt 0:fdf9c2c5200f 122
yueee_yt 0:fdf9c2c5200f 123 int HTTPRequestHandler::writeData(const char* buf, int len)
yueee_yt 0:fdf9c2c5200f 124 {
yueee_yt 0:fdf9c2c5200f 125 if(!m_headersSent) {
yueee_yt 0:fdf9c2c5200f 126 m_headersSent = true;
yueee_yt 0:fdf9c2c5200f 127 writeHeaders();
yueee_yt 0:fdf9c2c5200f 128 }
yueee_yt 0:fdf9c2c5200f 129 return m_pTCPSocketConnection->send((char *)buf, len);
yueee_yt 0:fdf9c2c5200f 130 }
yueee_yt 0:fdf9c2c5200f 131 /**
yueee_yt 0:fdf9c2c5200f 132 void HTTPRequestHandler::setTimeout(int ms)
yueee_yt 0:fdf9c2c5200f 133 {
yueee_yt 0:fdf9c2c5200f 134 m_timeout = 1000*ms;
yueee_yt 0:fdf9c2c5200f 135 resetTimeout();
yueee_yt 0:fdf9c2c5200f 136 }
yueee_yt 0:fdf9c2c5200f 137 **/
yueee_yt 0:fdf9c2c5200f 138 /**
yueee_yt 0:fdf9c2c5200f 139 void HTTPRequestHandler::resetTimeout()
yueee_yt 0:fdf9c2c5200f 140 {
yueee_yt 0:fdf9c2c5200f 141 m_watchdog.detach();
yueee_yt 0:fdf9c2c5200f 142 m_watchdog.attach_us<HTTPRequestHandler>(this, &HTTPRequestHandler::onTimeout, m_timeout);
yueee_yt 0:fdf9c2c5200f 143 }
yueee_yt 0:fdf9c2c5200f 144 **/
yueee_yt 0:fdf9c2c5200f 145
yueee_yt 0:fdf9c2c5200f 146 void HTTPRequestHandler::readHeaders()
yueee_yt 0:fdf9c2c5200f 147 {
yueee_yt 0:fdf9c2c5200f 148 static char line[128];
yueee_yt 0:fdf9c2c5200f 149 static char key[128];
yueee_yt 0:fdf9c2c5200f 150 static char value[128];
yueee_yt 0:fdf9c2c5200f 151 while( readLine(line, 128) > 0) { //if == 0, it is an empty line = end of headers
yueee_yt 0:fdf9c2c5200f 152 int n = sscanf(line, "%[^:]: %[^\n]", key, value);
yueee_yt 0:fdf9c2c5200f 153 if ( n == 2 ) {
yueee_yt 4:1b6b021ee21d 154 #ifdef _DEBUG_REQUEST_HANDLER
yueee_yt 0:fdf9c2c5200f 155 printf("\r\n+++(HTTPRequestHandler)Read header : %s : %s\r\n", key, value);
yueee_yt 4:1b6b021ee21d 156 #endif
yueee_yt 0:fdf9c2c5200f 157 m_reqHeaders[key] = value;
yueee_yt 0:fdf9c2c5200f 158 }
yueee_yt 0:fdf9c2c5200f 159 //TODO: Impl n==1 case (part 2 of previous header)
yueee_yt 0:fdf9c2c5200f 160 }
yueee_yt 0:fdf9c2c5200f 161 }
yueee_yt 0:fdf9c2c5200f 162
yueee_yt 0:fdf9c2c5200f 163 void HTTPRequestHandler::writeHeaders() //Called at the first writeData call
yueee_yt 0:fdf9c2c5200f 164 {
yueee_yt 0:fdf9c2c5200f 165 static char line[128];
yueee_yt 0:fdf9c2c5200f 166
yueee_yt 0:fdf9c2c5200f 167 //Response line
yueee_yt 0:fdf9c2c5200f 168 sprintf(line, "HTTP/1.1 %d MbedInfo\r\n", m_errc); //Not a violation of the standard not to include the descriptive text
yueee_yt 0:fdf9c2c5200f 169 m_pTCPSocketConnection->send(line, strlen(line));
yueee_yt 0:fdf9c2c5200f 170
yueee_yt 0:fdf9c2c5200f 171 map<string,string>::iterator it;
yueee_yt 0:fdf9c2c5200f 172 while( !m_respHeaders.empty() ) {
yueee_yt 0:fdf9c2c5200f 173 it = m_respHeaders.begin();
yueee_yt 0:fdf9c2c5200f 174 sprintf(line, "%s: %s\r\n", (*it).first.c_str(), (*it).second.c_str() );
yueee_yt 4:1b6b021ee21d 175 #ifdef _DEBUG_REQUEST_HANDLER
yueee_yt 0:fdf9c2c5200f 176 printf("\r\n+++(HTTPRequestHandler)%s", line);
yueee_yt 4:1b6b021ee21d 177 #endif
yueee_yt 0:fdf9c2c5200f 178 m_pTCPSocketConnection->send(line, strlen(line));
yueee_yt 0:fdf9c2c5200f 179 m_respHeaders.erase(it);
yueee_yt 0:fdf9c2c5200f 180 }
yueee_yt 0:fdf9c2c5200f 181 m_pTCPSocketConnection->send("\r\n",2); //End of head
yueee_yt 0:fdf9c2c5200f 182 }
yueee_yt 0:fdf9c2c5200f 183
yueee_yt 0:fdf9c2c5200f 184 int HTTPRequestHandler::readLine(char* str, int maxLen)
yueee_yt 0:fdf9c2c5200f 185 {
yueee_yt 0:fdf9c2c5200f 186 int ret;
yueee_yt 0:fdf9c2c5200f 187 int len = 0;
yueee_yt 0:fdf9c2c5200f 188 for(int i = 0; i < maxLen - 1; i++) {
yueee_yt 0:fdf9c2c5200f 189 ret = m_pTCPSocketConnection->receive(str, 1);
yueee_yt 0:fdf9c2c5200f 190 if(!ret) {
yueee_yt 0:fdf9c2c5200f 191 break;
yueee_yt 0:fdf9c2c5200f 192 }
yueee_yt 0:fdf9c2c5200f 193 if( (len > 1) && *(str-1)=='\r' && *str=='\n' ) {
yueee_yt 0:fdf9c2c5200f 194 str--;
yueee_yt 0:fdf9c2c5200f 195 len-=2;
yueee_yt 0:fdf9c2c5200f 196 break;
yueee_yt 0:fdf9c2c5200f 197 } else if( *str=='\n' ) {
yueee_yt 0:fdf9c2c5200f 198 len--;
yueee_yt 0:fdf9c2c5200f 199 break;
yueee_yt 0:fdf9c2c5200f 200 }
yueee_yt 0:fdf9c2c5200f 201 str++;
yueee_yt 0:fdf9c2c5200f 202 len++;
yueee_yt 0:fdf9c2c5200f 203 }
yueee_yt 0:fdf9c2c5200f 204 *str = 0;
yueee_yt 0:fdf9c2c5200f 205 return len;
yueee_yt 0:fdf9c2c5200f 206 }
yueee_yt 0:fdf9c2c5200f 207 /**
yueee_yt 0:fdf9c2c5200f 208 void HTTPRequestHandler::onTCPSocketEvent(TCPSocketEvent e)
yueee_yt 0:fdf9c2c5200f 209 {
yueee_yt 0:fdf9c2c5200f 210 //printf("\r\nEvent %d in HTTPRequestHandler\r\n", e);
yueee_yt 0:fdf9c2c5200f 211 printf("\r\n+++(HTTPRequestHandler)Event in HTTPRequestHandler\r\n");
yueee_yt 0:fdf9c2c5200f 212
yueee_yt 0:fdf9c2c5200f 213 if(m_closed)
yueee_yt 0:fdf9c2c5200f 214 {
yueee_yt 0:fdf9c2c5200f 215 printf("\r\n+++(HTTPRequestHandler)WARN: Discarded\r\n");
yueee_yt 0:fdf9c2c5200f 216 return;
yueee_yt 0:fdf9c2c5200f 217 }
yueee_yt 0:fdf9c2c5200f 218
yueee_yt 0:fdf9c2c5200f 219 switch(e)
yueee_yt 0:fdf9c2c5200f 220 {
yueee_yt 0:fdf9c2c5200f 221 case TCPSOCKET_READABLE:
yueee_yt 0:fdf9c2c5200f 222 resetTimeout();
yueee_yt 0:fdf9c2c5200f 223 onReadable();
yueee_yt 0:fdf9c2c5200f 224 break;
yueee_yt 0:fdf9c2c5200f 225 case TCPSOCKET_WRITEABLE:
yueee_yt 0:fdf9c2c5200f 226 resetTimeout();
yueee_yt 0:fdf9c2c5200f 227 onWriteable();
yueee_yt 0:fdf9c2c5200f 228 break;
yueee_yt 0:fdf9c2c5200f 229 case TCPSOCKET_CONTIMEOUT:
yueee_yt 0:fdf9c2c5200f 230 case TCPSOCKET_CONRST:
yueee_yt 0:fdf9c2c5200f 231 case TCPSOCKET_CONABRT:
yueee_yt 0:fdf9c2c5200f 232 case TCPSOCKET_ERROR:
yueee_yt 0:fdf9c2c5200f 233 case TCPSOCKET_DISCONNECTED:
yueee_yt 0:fdf9c2c5200f 234 DBG("\r\nConnection error in handler\r\n");
yueee_yt 0:fdf9c2c5200f 235 close();
yueee_yt 0:fdf9c2c5200f 236 break;
yueee_yt 0:fdf9c2c5200f 237 }
yueee_yt 0:fdf9c2c5200f 238 }
yueee_yt 0:fdf9c2c5200f 239 **/