Team E1
Fork of HTTPServer by
HTTPServer.cpp@5:dc88012caef1, 2013-06-01 (annotated)
- Committer:
- leihen
- Date:
- Sat Jun 01 06:24:43 2013 +0000
- Revision:
- 5:dc88012caef1
- Parent:
- 4:d065642c32cc
- Child:
- 6:fe661fa9d18a
Now also supporting RPC get requests
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
leihen | 0:7a2421e63e74 | 1 | #include "mbed.h" |
leihen | 0:7a2421e63e74 | 2 | #include "HTTPServer.h" |
leihen | 0:7a2421e63e74 | 3 | |
leihen | 4:d065642c32cc | 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 | 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 | 0:7a2421e63e74 | 92 | int HTTPServer::poll() |
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 | 5:dc88012caef1 | 104 | m_pSvr->set_blocking(true); |
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 | } |