raf vervoort / HTTPServer

Team E1

Fork of HTTPServer by Sam Kirsch

HTTPServer.cpp@9:c2a1462b9b71, 2013-06-02 (annotated)

Committer:
leihen
Date:
Sun Jun 02 00:33:56 2013 +0000
Revision:
9:c2a1462b9b71
Parent:
6:fe661fa9d18a
Child:
11:3943841e1798
Some small simplifications and improvements.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
leihen 0:7a2421e63e74 1 #include "mbed.h"
leihen 0:7a2421e63e74 2 #include "HTTPServer.h"
leihen 0:7a2421e63e74 3
leihen 9:c2a1462b9b71 4 #define _DEBUG 1
leihen 4:d065642c32cc 5
leihen 4:d065642c32cc 6 #ifdef _DEBUG
leihen 0:7a2421e63e74 7 DigitalOut led1(LED1);
leihen 0:7a2421e63e74 8 DigitalOut led2(LED2);
leihen 0:7a2421e63e74 9 DigitalOut led3(LED3);
leihen 0:7a2421e63e74 10 DigitalOut led4(LED4);
leihen 4:d065642c32cc 11 #endif
leihen 0:7a2421e63e74 12
leihen 4:d065642c32cc 13 #if (_DEBUG && !defined(TARGET_LPC11U24))
leihen 9:c2a1462b9b71 14 #define INFO(x, ...) std::printf("[HttpServer : DBG]"x"\r\n", ##__VA_ARGS__);
leihen 9:c2a1462b9b71 15 #define WARN(x, ...) std::printf("[HttpServer : DBG]"x"\r\n", ##__VA_ARGS__);
leihen 9:c2a1462b9b71 16 #define ERR(x, ...) std::printf("[HttpServer : DBG]"x"\r\n", ##__VA_ARGS__);
leihen 0:7a2421e63e74 17 #else
leihen 0:7a2421e63e74 18 #define INFO(x, ...)
leihen 0:7a2421e63e74 19 #define WARN(x, ...)
leihen 0:7a2421e63e74 20 #define ERR(x, ...)
leihen 0:7a2421e63e74 21 #endif
leihen 0:7a2421e63e74 22
leihen 4:d065642c32cc 23
leihen 4:d065642c32cc 24 /* Constructor */
leihen 4:d065642c32cc 25 /* initialize all members and set the standard error handler. */
leihen 9:c2a1462b9b71 26 HTTPServer::HTTPServer(PinName tx, PinName rx, PinName reset, PinName tcp_status, const char * ssid, const char * phrase, Security sec)
leihen 9:c2a1462b9b71 27 : m_wifly(tx, rx, reset, tcp_status, ssid, phrase, sec)
leihen 0:7a2421e63e74 28 {
leihen 9:c2a1462b9b71 29 m_pErrorHandler = StdErrorHandler;
leihen 0:7a2421e63e74 30 m_pSvr = NULL;
leihen 0:7a2421e63e74 31 }
leihen 0:7a2421e63e74 32
leihen 0:7a2421e63e74 33 HTTPServer::~HTTPServer()
leihen 0:7a2421e63e74 34 {
leihen 0:7a2421e63e74 35 if (m_pSvr) {
leihen 0:7a2421e63e74 36 delete m_pSvr;
leihen 0:7a2421e63e74 37 m_pSvr = NULL;
leihen 0:7a2421e63e74 38 }
leihen 0:7a2421e63e74 39 }
leihen 0:7a2421e63e74 40
leihen 2:8653bbcf7e58 41
leihen 4:d065642c32cc 42 static const char* szStdErrorPage = "<HTML><HEAD><META content=\"text/html\" http-equiv=Content-Type></HEAD><BODY><h1>Error 404</h1><P>This resource is not available<P></BODY></HTML>\r\n\r\n";
leihen 2:8653bbcf7e58 43
leihen 3:d6224049b3bf 44 void HTTPServer::StdErrorHandler(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp)
leihen 2:8653bbcf7e58 45 {
leihen 4:d065642c32cc 46 char echoHeader[256];
leihen 2:8653bbcf7e58 47 tcp.set_blocking(true, 1500);
leihen 2:8653bbcf7e58 48 sprintf(echoHeader,"HTTP/1.1 404 Fail\r\nContent-Length: %d\r\nContent-Type: text/html\r\nServer: mbed embedded\r\n\n\r",strlen(szStdErrorPage));
leihen 2:8653bbcf7e58 49 tcp.send(echoHeader, strlen(echoHeader));
leihen 2:8653bbcf7e58 50 tcp.send((char*)szStdErrorPage, strlen(szStdErrorPage));
leihen 2:8653bbcf7e58 51 }
leihen 2:8653bbcf7e58 52
leihen 2:8653bbcf7e58 53
leihen 0:7a2421e63e74 54 int HTTPServer::start(int port)
leihen 0:7a2421e63e74 55 {
leihen 0:7a2421e63e74 56 // check if the start member was called already once
leihen 0:7a2421e63e74 57 if (m_pSvr != NULL) {
leihen 0:7a2421e63e74 58 ERR("start function was already called, server is already in listening state.");
leihen 0:7a2421e63e74 59 return -1;
leihen 0:7a2421e63e74 60 }
leihen 9:c2a1462b9b71 61 INFO("Initializing wifly\n");
leihen 9:c2a1462b9b71 62 // Initialize the wifly wlan device
leihen 9:c2a1462b9b71 63 m_wifly.init();
leihen 9:c2a1462b9b71 64
leihen 9:c2a1462b9b71 65 INFO("Connecting to network...");
leihen 9:c2a1462b9b71 66 // Try join the network
leihen 9:c2a1462b9b71 67 while(!m_wifly.connect());
leihen 9:c2a1462b9b71 68 INFO("connected\n");
leihen 9:c2a1462b9b71 69
leihen 9:c2a1462b9b71 70 // check if the start member was called already once
leihen 9:c2a1462b9b71 71 if (m_pSvr != NULL) {
leihen 9:c2a1462b9b71 72 ERR("start function was already called, server is already in listening state.");
leihen 9:c2a1462b9b71 73 return -1;
leihen 9:c2a1462b9b71 74 }
leihen 0:7a2421e63e74 75
leihen 0:7a2421e63e74 76 // Create a new server object
leihen 0:7a2421e63e74 77 m_pSvr = new TCPSocketServer();
leihen 0:7a2421e63e74 78
leihen 0:7a2421e63e74 79 // Bind the local server to the given port
leihen 0:7a2421e63e74 80 if (m_pSvr->bind(port) < 0) {
leihen 0:7a2421e63e74 81 ERR("Failed to bind to port %d\n", port);
leihen 0:7a2421e63e74 82 return -1;
leihen 0:7a2421e63e74 83 }
leihen 0:7a2421e63e74 84 else {
leihen 0:7a2421e63e74 85 INFO("Binding succeeded !\n");
leihen 0:7a2421e63e74 86 }
leihen 0:7a2421e63e74 87
leihen 0:7a2421e63e74 88 // Listen to a maximum of 10 concurrent connections
leihen 0:7a2421e63e74 89 if (m_pSvr->listen(1) < 0) {
leihen 0:7a2421e63e74 90 ERR("Faild to listen !\n");
leihen 0:7a2421e63e74 91 delete m_pSvr;
leihen 0:7a2421e63e74 92 m_pSvr = NULL;
leihen 0:7a2421e63e74 93 return -1;
leihen 0:7a2421e63e74 94 }
leihen 0:7a2421e63e74 95 else {
leihen 0:7a2421e63e74 96 INFO("Listening\n");
leihen 0:7a2421e63e74 97 }
leihen 0:7a2421e63e74 98
leihen 0:7a2421e63e74 99 // set into non blocking operation
leihen 0:7a2421e63e74 100 m_pSvr->set_blocking(false, 100);
leihen 0:7a2421e63e74 101
leihen 0:7a2421e63e74 102 return 0;
leihen 0:7a2421e63e74 103 }
leihen 0:7a2421e63e74 104
leihen 0:7a2421e63e74 105
leihen 6:fe661fa9d18a 106 int HTTPServer::poll(bool blocking)
leihen 0:7a2421e63e74 107 {
leihen 5:dc88012caef1 108 int retval = -1;
leihen 0:7a2421e63e74 109 INFO("Listening for new connection requests.");
leihen 0:7a2421e63e74 110
leihen 0:7a2421e63e74 111 // This thread basically checks if there is a new incoming connection.
leihen 0:7a2421e63e74 112 // If so , a new HTTPConnection is created and the connection thread is started.
leihen 0:7a2421e63e74 113 TCPSocketConnection Clnt;
leihen 0:7a2421e63e74 114
leihen 4:d065642c32cc 115 #ifdef _DEBUG
leihen 0:7a2421e63e74 116 led4 = 1; // Indicate we are waiting for a new connection
leihen 5:dc88012caef1 117 #endif
leihen 6:fe661fa9d18a 118 m_pSvr->set_blocking(blocking);
leihen 5:dc88012caef1 119 retval = m_pSvr->accept(Clnt);
leihen 5:dc88012caef1 120 if (retval > 0) {
leihen 5:dc88012caef1 121 // no connection availale yet, so just return
leihen 5:dc88012caef1 122 #ifdef _DEBUG
leihen 5:dc88012caef1 123 led4 = 0;
leihen 5:dc88012caef1 124 led3 = 0;
leihen 5:dc88012caef1 125 led2 = 0;
leihen 5:dc88012caef1 126 #endif
leihen 5:dc88012caef1 127 return retval;
leihen 5:dc88012caef1 128 }
leihen 5:dc88012caef1 129 if ( retval < 0) {
leihen 0:7a2421e63e74 130 // an error occured
leihen 0:7a2421e63e74 131 ERR("There was an error, Accept returned with an error. Probably the connection to the router was lost. Shutting down server");
leihen 4:d065642c32cc 132 #ifdef _DEBUG
leihen 0:7a2421e63e74 133 led2 = 0;
leihen 4:d065642c32cc 134 #endif
leihen 0:7a2421e63e74 135 m_pSvr->close();
leihen 0:7a2421e63e74 136 delete m_pSvr;
leihen 0:7a2421e63e74 137 m_pSvr = NULL;
leihen 4:d065642c32cc 138 #ifdef _DEBUG
leihen 0:7a2421e63e74 139 led4 = 0;
leihen 0:7a2421e63e74 140 led3 = 1; // ERROR
leihen 0:7a2421e63e74 141 led2 = 0;
leihen 0:7a2421e63e74 142 led1 = 0;
leihen 4:d065642c32cc 143 #endif
leihen 0:7a2421e63e74 144 return -1;
leihen 0:7a2421e63e74 145 }
leihen 0:7a2421e63e74 146 else {
leihen 4:d065642c32cc 147 #ifdef _DEBUG
leihen 0:7a2421e63e74 148 led4 = 0;
leihen 4:d065642c32cc 149 #endif
leihen 0:7a2421e63e74 150 // a new connection was received
leihen 0:7a2421e63e74 151 INFO("Client (IP=%s) is connected !\n", Clnt.get_address());
leihen 0:7a2421e63e74 152 // Start the main connection thread
leihen 4:d065642c32cc 153 #ifdef _DEBUG
leihen 0:7a2421e63e74 154 led3 = 1;
leihen 0:7a2421e63e74 155 led2 = 1;
leihen 4:d065642c32cc 156 #endif
leihen 0:7a2421e63e74 157 HTTPConnection con;
leihen 0:7a2421e63e74 158 int c = con.poll();
leihen 0:7a2421e63e74 159 if (c == 0) {
leihen 1:6b7472d5e9ee 160 // Handle the request
leihen 1:6b7472d5e9ee 161 HandleRequest(con.m_Msg, Clnt);
leihen 0:7a2421e63e74 162 }
leihen 4:d065642c32cc 163 #ifdef _DEBUG
leihen 0:7a2421e63e74 164 led2 = 0;
leihen 0:7a2421e63e74 165 led3 = 0;
leihen 4:d065642c32cc 166 #endif
leihen 0:7a2421e63e74 167 }
leihen 0:7a2421e63e74 168
leihen 0:7a2421e63e74 169 INFO("Leaving polling thread");
leihen 0:7a2421e63e74 170 return 0;
leihen 1:6b7472d5e9ee 171 }
leihen 1:6b7472d5e9ee 172
leihen 3:d6224049b3bf 173 void HTTPServer::HandleRequest(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp)
leihen 3:d6224049b3bf 174 {
leihen 3:d6224049b3bf 175 std::string localPath;
leihen 3:d6224049b3bf 176 std::map<std::string, HTTPRequestHandler*(*)(const char*, const char*, HTTPConnection::HTTPMessage&, TCPSocketConnection&), handlersComp>::const_iterator it;
leihen 3:d6224049b3bf 177
leihen 4:d065642c32cc 178 // Iterate through registered handlers and check if the handler's path is a subset of the requested uri.
leihen 3:d6224049b3bf 179 for (it = m_lpHandlers.begin() ; it != m_lpHandlers.end() ; it++) {
leihen 3:d6224049b3bf 180 // check if this entries' path is fully contained at the beginning of the requested path
leihen 3:d6224049b3bf 181 std::string curpth = it->first;
leihen 3:d6224049b3bf 182
leihen 3:d6224049b3bf 183 if (msg.uri.find(curpth) == 0) {
leihen 4:d065642c32cc 184 // firts matching handler found, we just take it and we'll be happy
leihen 3:d6224049b3bf 185 localPath = msg.uri.substr(curpth.length());
leihen 3:d6224049b3bf 186 break;
leihen 3:d6224049b3bf 187 }
leihen 3:d6224049b3bf 188 }
leihen 3:d6224049b3bf 189
leihen 3:d6224049b3bf 190 if (it == m_lpHandlers.end()) {
leihen 3:d6224049b3bf 191 // There is no such handler, so return invalid
leihen 3:d6224049b3bf 192
leihen 3:d6224049b3bf 193 m_pErrorHandler(msg, tcp);
leihen 3:d6224049b3bf 194 INFO("Webrequest left unhandled.");
leihen 3:d6224049b3bf 195 }
leihen 3:d6224049b3bf 196 else {
leihen 4:d065642c32cc 197 // Valid handler was found
leihen 3:d6224049b3bf 198 INFO("Routing webrequest !");
leihen 4:d065642c32cc 199 // Instantiate the handler object (handling will be done from withing the object's constructor
leihen 3:d6224049b3bf 200 HTTPRequestHandler *phdl = (*it->second)(it->first.c_str(), localPath.c_str(), msg, tcp);
leihen 4:d065642c32cc 201 // now we can delete the object, because handling is completed.
leihen 3:d6224049b3bf 202 if (phdl != NULL)
leihen 3:d6224049b3bf 203 delete phdl;
leihen 3:d6224049b3bf 204 }
leihen 3:d6224049b3bf 205 }