oludotun ode / HTTPServer

Mbed asked me to commit the library. Probably because it's an older version

Dependents:   ece4180_project

Fork of HTTPServer by Sarah Marsh

HTTPServer.cpp@6:fe661fa9d18a, 2013-06-01 (annotated)

Committer:
leihen
Date:
Sat Jun 01 16:49:17 2013 +0000
Revision:
6:fe661fa9d18a
Parent:
5:dc88012caef1
Child:
9:c2a1462b9b71
Added DEBUG preprocessor constant to each file.

; Added non-blocking polling function.

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 6:fe661fa9d18a 4 #define _DEBUG 0
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 0:7a2421e63e74 14 #define INFO(x, ...) if (m_pDbg) m_pDbg->printf("[HttpServer : DBG]"x"\r\n", ##__VA_ARGS__); else printf("[HttpServer : DBG]"x"\r\n", ##__VA_ARGS__);
leihen 0:7a2421e63e74 15 #define WARN(x, ...) if (m_pDbg) m_pDbg->printf("[HttpServer : WARN]"x"\r\n", ##__VA_ARGS__); else printf("[HttpServer : DBG]"x"\r\n", ##__VA_ARGS__);
leihen 0:7a2421e63e74 16 #define ERR(x, ...) if (m_pDbg) m_pDbg->printf("[HttpServer : ERR]"x"\r\n", ##__VA_ARGS__); else 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 3:d6224049b3bf 26 HTTPServer::HTTPServer(Serial *dbg)
leihen 0:7a2421e63e74 27 {
leihen 3:d6224049b3bf 28 m_pDbg = dbg;
leihen 0:7a2421e63e74 29 m_pSvr = NULL;
leihen 2:8653bbcf7e58 30 m_pErrorHandler = StdErrorHandler;
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 0:7a2421e63e74 61
leihen 0:7a2421e63e74 62 // Create a new server object
leihen 0:7a2421e63e74 63 m_pSvr = new TCPSocketServer();
leihen 0:7a2421e63e74 64
leihen 0:7a2421e63e74 65 // Bind the local server to the given port
leihen 0:7a2421e63e74 66 if (m_pSvr->bind(port) < 0) {
leihen 0:7a2421e63e74 67 ERR("Failed to bind to port %d\n", port);
leihen 0:7a2421e63e74 68 return -1;
leihen 0:7a2421e63e74 69 }
leihen 0:7a2421e63e74 70 else {
leihen 0:7a2421e63e74 71 INFO("Binding succeeded !\n");
leihen 0:7a2421e63e74 72 }
leihen 0:7a2421e63e74 73
leihen 0:7a2421e63e74 74 // Listen to a maximum of 10 concurrent connections
leihen 0:7a2421e63e74 75 if (m_pSvr->listen(1) < 0) {
leihen 0:7a2421e63e74 76 ERR("Faild to listen !\n");
leihen 0:7a2421e63e74 77 delete m_pSvr;
leihen 0:7a2421e63e74 78 m_pSvr = NULL;
leihen 0:7a2421e63e74 79 return -1;
leihen 0:7a2421e63e74 80 }
leihen 0:7a2421e63e74 81 else {
leihen 0:7a2421e63e74 82 INFO("Listening\n");
leihen 0:7a2421e63e74 83 }
leihen 0:7a2421e63e74 84
leihen 0:7a2421e63e74 85 // set into non blocking operation
leihen 0:7a2421e63e74 86 m_pSvr->set_blocking(false, 100);
leihen 0:7a2421e63e74 87
leihen 0:7a2421e63e74 88 return 0;
leihen 0:7a2421e63e74 89 }
leihen 0:7a2421e63e74 90
leihen 0:7a2421e63e74 91
leihen 6:fe661fa9d18a 92 int HTTPServer::poll(bool blocking)
leihen 0:7a2421e63e74 93 {
leihen 5:dc88012caef1 94 int retval = -1;
leihen 0:7a2421e63e74 95 INFO("Listening for new connection requests.");
leihen 0:7a2421e63e74 96
leihen 0:7a2421e63e74 97 // This thread basically checks if there is a new incoming connection.
leihen 0:7a2421e63e74 98 // If so , a new HTTPConnection is created and the connection thread is started.
leihen 0:7a2421e63e74 99 TCPSocketConnection Clnt;
leihen 0:7a2421e63e74 100
leihen 4:d065642c32cc 101 #ifdef _DEBUG
leihen 0:7a2421e63e74 102 led4 = 1; // Indicate we are waiting for a new connection
leihen 5:dc88012caef1 103 #endif
leihen 6:fe661fa9d18a 104 m_pSvr->set_blocking(blocking);
leihen 5:dc88012caef1 105 retval = m_pSvr->accept(Clnt);
leihen 5:dc88012caef1 106 if (retval > 0) {
leihen 5:dc88012caef1 107 // no connection availale yet, so just return
leihen 5:dc88012caef1 108 #ifdef _DEBUG
leihen 5:dc88012caef1 109 led4 = 0;
leihen 5:dc88012caef1 110 led3 = 0;
leihen 5:dc88012caef1 111 led2 = 0;
leihen 5:dc88012caef1 112 #endif
leihen 5:dc88012caef1 113 return retval;
leihen 5:dc88012caef1 114 }
leihen 5:dc88012caef1 115 if ( retval < 0) {
leihen 0:7a2421e63e74 116 // an error occured
leihen 0:7a2421e63e74 117 ERR("There was an error, Accept returned with an error. Probably the connection to the router was lost. Shutting down server");
leihen 4:d065642c32cc 118 #ifdef _DEBUG
leihen 0:7a2421e63e74 119 led2 = 0;
leihen 4:d065642c32cc 120 #endif
leihen 0:7a2421e63e74 121 m_pSvr->close();
leihen 0:7a2421e63e74 122 delete m_pSvr;
leihen 0:7a2421e63e74 123 m_pSvr = NULL;
leihen 4:d065642c32cc 124 #ifdef _DEBUG
leihen 0:7a2421e63e74 125 led4 = 0;
leihen 0:7a2421e63e74 126 led3 = 1; // ERROR
leihen 0:7a2421e63e74 127 led2 = 0;
leihen 0:7a2421e63e74 128 led1 = 0;
leihen 4:d065642c32cc 129 #endif
leihen 0:7a2421e63e74 130 return -1;
leihen 0:7a2421e63e74 131 }
leihen 0:7a2421e63e74 132 else {
leihen 4:d065642c32cc 133 #ifdef _DEBUG
leihen 0:7a2421e63e74 134 led4 = 0;
leihen 4:d065642c32cc 135 #endif
leihen 0:7a2421e63e74 136 // a new connection was received
leihen 0:7a2421e63e74 137 INFO("Client (IP=%s) is connected !\n", Clnt.get_address());
leihen 0:7a2421e63e74 138 // Start the main connection thread
leihen 4:d065642c32cc 139 #ifdef _DEBUG
leihen 0:7a2421e63e74 140 led3 = 1;
leihen 0:7a2421e63e74 141 led2 = 1;
leihen 4:d065642c32cc 142 #endif
leihen 0:7a2421e63e74 143 HTTPConnection con;
leihen 0:7a2421e63e74 144 int c = con.poll();
leihen 0:7a2421e63e74 145 if (c == 0) {
leihen 1:6b7472d5e9ee 146 // Handle the request
leihen 1:6b7472d5e9ee 147 HandleRequest(con.m_Msg, Clnt);
leihen 0:7a2421e63e74 148 }
leihen 4:d065642c32cc 149 #ifdef _DEBUG
leihen 0:7a2421e63e74 150 led2 = 0;
leihen 0:7a2421e63e74 151 led3 = 0;
leihen 4:d065642c32cc 152 #endif
leihen 0:7a2421e63e74 153 }
leihen 0:7a2421e63e74 154
leihen 0:7a2421e63e74 155 INFO("Leaving polling thread");
leihen 0:7a2421e63e74 156 return 0;
leihen 1:6b7472d5e9ee 157 }
leihen 1:6b7472d5e9ee 158
leihen 3:d6224049b3bf 159 void HTTPServer::HandleRequest(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp)
leihen 3:d6224049b3bf 160 {
leihen 3:d6224049b3bf 161 std::string localPath;
leihen 3:d6224049b3bf 162 std::map<std::string, HTTPRequestHandler*(*)(const char*, const char*, HTTPConnection::HTTPMessage&, TCPSocketConnection&), handlersComp>::const_iterator it;
leihen 3:d6224049b3bf 163
leihen 4:d065642c32cc 164 // Iterate through registered handlers and check if the handler's path is a subset of the requested uri.
leihen 3:d6224049b3bf 165 for (it = m_lpHandlers.begin() ; it != m_lpHandlers.end() ; it++) {
leihen 3:d6224049b3bf 166 // check if this entries' path is fully contained at the beginning of the requested path
leihen 3:d6224049b3bf 167 std::string curpth = it->first;
leihen 3:d6224049b3bf 168
leihen 3:d6224049b3bf 169 if (msg.uri.find(curpth) == 0) {
leihen 4:d065642c32cc 170 // firts matching handler found, we just take it and we'll be happy
leihen 3:d6224049b3bf 171 localPath = msg.uri.substr(curpth.length());
leihen 3:d6224049b3bf 172 break;
leihen 3:d6224049b3bf 173 }
leihen 3:d6224049b3bf 174 }
leihen 3:d6224049b3bf 175
leihen 3:d6224049b3bf 176 if (it == m_lpHandlers.end()) {
leihen 3:d6224049b3bf 177 // There is no such handler, so return invalid
leihen 3:d6224049b3bf 178
leihen 3:d6224049b3bf 179 m_pErrorHandler(msg, tcp);
leihen 3:d6224049b3bf 180 INFO("Webrequest left unhandled.");
leihen 3:d6224049b3bf 181 }
leihen 3:d6224049b3bf 182 else {
leihen 4:d065642c32cc 183 // Valid handler was found
leihen 3:d6224049b3bf 184 INFO("Routing webrequest !");
leihen 4:d065642c32cc 185 // Instantiate the handler object (handling will be done from withing the object's constructor
leihen 3:d6224049b3bf 186 HTTPRequestHandler *phdl = (*it->second)(it->first.c_str(), localPath.c_str(), msg, tcp);
leihen 4:d065642c32cc 187 // now we can delete the object, because handling is completed.
leihen 3:d6224049b3bf 188 if (phdl != NULL)
leihen 3:d6224049b3bf 189 delete phdl;
leihen 3:d6224049b3bf 190 }
leihen 3:d6224049b3bf 191 }