Single instance HTTP Server using new Ethernet Interface. Blocking mode only; this improved stability, but the HTTP server must be started from a separate thread.
Fork of HTTPServer by
HTTPServer.cpp@13:aa5338a5e452, 2013-06-22 (annotated)
- Committer:
- leihen
- Date:
- Sat Jun 22 15:41:34 2013 +0000
- Revision:
- 13:aa5338a5e452
- Parent:
- 12:ba81cc117fb6
- Child:
- 14:011edcd33e86
First Version of a working Ethernet HTTP Server.
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 | 13:aa5338a5e452 | 3 | #define DEBUG |
leihen | 13:aa5338a5e452 | 4 | #include "debug.h" |
leihen | 0:7a2421e63e74 | 5 | |
leihen | 13:aa5338a5e452 | 6 | #define _DEBUG 1 |
leihen | 4:d065642c32cc | 7 | |
leihen | 4:d065642c32cc | 8 | #ifdef _DEBUG |
leihen | 0:7a2421e63e74 | 9 | DigitalOut led1(LED1); |
leihen | 0:7a2421e63e74 | 10 | DigitalOut led2(LED2); |
leihen | 0:7a2421e63e74 | 11 | DigitalOut led3(LED3); |
leihen | 0:7a2421e63e74 | 12 | DigitalOut led4(LED4); |
leihen | 4:d065642c32cc | 13 | #endif |
leihen | 0:7a2421e63e74 | 14 | |
leihen | 13:aa5338a5e452 | 15 | static EthernetInterface eth; |
leihen | 4:d065642c32cc | 16 | |
leihen | 4:d065642c32cc | 17 | /* Constructor */ |
leihen | 4:d065642c32cc | 18 | /* initialize all members and set the standard error handler. */ |
leihen | 13:aa5338a5e452 | 19 | HTTPServer::HTTPServer() |
leihen | 0:7a2421e63e74 | 20 | { |
leihen | 9:c2a1462b9b71 | 21 | m_pErrorHandler = StdErrorHandler; |
leihen | 0:7a2421e63e74 | 22 | } |
leihen | 0:7a2421e63e74 | 23 | |
leihen | 0:7a2421e63e74 | 24 | HTTPServer::~HTTPServer() |
leihen | 0:7a2421e63e74 | 25 | { |
leihen | 0:7a2421e63e74 | 26 | } |
leihen | 0:7a2421e63e74 | 27 | |
leihen | 2:8653bbcf7e58 | 28 | |
leihen | 4:d065642c32cc | 29 | 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 | 30 | |
leihen | 3:d6224049b3bf | 31 | void HTTPServer::StdErrorHandler(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp) |
leihen | 2:8653bbcf7e58 | 32 | { |
leihen | 4:d065642c32cc | 33 | char echoHeader[256]; |
leihen | 2:8653bbcf7e58 | 34 | tcp.set_blocking(true, 1500); |
leihen | 11:3943841e1798 | 35 | sprintf(echoHeader,"HTTP/1.0 404 Fail\r\nConnection: close\r\nContent-Length: %d\r\nContent-Type: text/html\r\nServer: mbed embedded\r\n\n\r",strlen(szStdErrorPage)); |
leihen | 2:8653bbcf7e58 | 36 | tcp.send(echoHeader, strlen(echoHeader)); |
leihen | 2:8653bbcf7e58 | 37 | tcp.send((char*)szStdErrorPage, strlen(szStdErrorPage)); |
leihen | 2:8653bbcf7e58 | 38 | } |
leihen | 2:8653bbcf7e58 | 39 | |
leihen | 2:8653bbcf7e58 | 40 | |
leihen | 13:aa5338a5e452 | 41 | bool HTTPServer::start(int port) |
leihen | 0:7a2421e63e74 | 42 | { |
leihen | 13:aa5338a5e452 | 43 | INFO("Initializing network\n"); |
leihen | 13:aa5338a5e452 | 44 | eth.init(); |
leihen | 9:c2a1462b9b71 | 45 | |
leihen | 9:c2a1462b9b71 | 46 | INFO("Connecting to network..."); |
leihen | 13:aa5338a5e452 | 47 | eth.connect(); |
leihen | 9:c2a1462b9b71 | 48 | |
leihen | 13:aa5338a5e452 | 49 | INFO("Binding to port %d...", port); |
leihen | 13:aa5338a5e452 | 50 | if (m_Svr.bind(port) < 0) { |
leihen | 13:aa5338a5e452 | 51 | ERR("Failed to bind to port !\n"); |
leihen | 13:aa5338a5e452 | 52 | error("Binding"); |
leihen | 13:aa5338a5e452 | 53 | return false; |
leihen | 0:7a2421e63e74 | 54 | } |
leihen | 0:7a2421e63e74 | 55 | |
leihen | 13:aa5338a5e452 | 56 | INFO("Listening ..."); |
leihen | 13:aa5338a5e452 | 57 | if (m_Svr.listen(1) < 0) { |
leihen | 13:aa5338a5e452 | 58 | ERR("Failed to listen !\n"); |
leihen | 13:aa5338a5e452 | 59 | error("Listening"); |
leihen | 13:aa5338a5e452 | 60 | return false; |
leihen | 0:7a2421e63e74 | 61 | } |
leihen | 0:7a2421e63e74 | 62 | |
leihen | 13:aa5338a5e452 | 63 | ERR("Connected !"); |
leihen | 0:7a2421e63e74 | 64 | // set into non blocking operation |
leihen | 13:aa5338a5e452 | 65 | m_Svr.set_blocking(false, 100); |
leihen | 13:aa5338a5e452 | 66 | |
leihen | 13:aa5338a5e452 | 67 | return true; |
leihen | 0:7a2421e63e74 | 68 | } |
leihen | 0:7a2421e63e74 | 69 | |
leihen | 0:7a2421e63e74 | 70 | |
leihen | 6:fe661fa9d18a | 71 | int HTTPServer::poll(bool blocking) |
leihen | 13:aa5338a5e452 | 72 | { |
leihen | 5:dc88012caef1 | 73 | int retval = -1; |
leihen | 0:7a2421e63e74 | 74 | |
leihen | 13:aa5338a5e452 | 75 | #ifdef _DEBUG |
leihen | 13:aa5338a5e452 | 76 | led4 = 1; // Indicate we are waiting for a new connection |
leihen | 13:aa5338a5e452 | 77 | #endif |
leihen | 0:7a2421e63e74 | 78 | // This thread basically checks if there is a new incoming connection. |
leihen | 0:7a2421e63e74 | 79 | // If so , a new HTTPConnection is created and the connection thread is started. |
leihen | 0:7a2421e63e74 | 80 | TCPSocketConnection Clnt; |
leihen | 13:aa5338a5e452 | 81 | if (m_Svr.accept(Clnt) < 0) { |
leihen | 4:d065642c32cc | 82 | #ifdef _DEBUG |
leihen | 0:7a2421e63e74 | 83 | led4 = 0; |
leihen | 0:7a2421e63e74 | 84 | led3 = 1; // ERROR |
leihen | 0:7a2421e63e74 | 85 | led2 = 0; |
leihen | 0:7a2421e63e74 | 86 | led1 = 0; |
leihen | 4:d065642c32cc | 87 | #endif |
leihen | 0:7a2421e63e74 | 88 | return -1; |
leihen | 0:7a2421e63e74 | 89 | } |
leihen | 13:aa5338a5e452 | 90 | |
leihen | 13:aa5338a5e452 | 91 | // a new connection was received |
leihen | 13:aa5338a5e452 | 92 | INFO("Client (IP=%s) is connected !\n", Clnt.get_address()); |
leihen | 13:aa5338a5e452 | 93 | #ifdef _DEBUG |
leihen | 13:aa5338a5e452 | 94 | led4 = 0; |
leihen | 13:aa5338a5e452 | 95 | led3 = 0; |
leihen | 13:aa5338a5e452 | 96 | led2 = 0; |
leihen | 13:aa5338a5e452 | 97 | #endif |
leihen | 13:aa5338a5e452 | 98 | |
leihen | 4:d065642c32cc | 99 | #ifdef _DEBUG |
leihen | 13:aa5338a5e452 | 100 | led3 = 1; |
leihen | 13:aa5338a5e452 | 101 | led2 = 1; |
leihen | 13:aa5338a5e452 | 102 | #endif |
leihen | 13:aa5338a5e452 | 103 | HTTPConnection con(Clnt); |
leihen | 13:aa5338a5e452 | 104 | int c = con.poll(); |
leihen | 13:aa5338a5e452 | 105 | if (c == 0) { |
leihen | 13:aa5338a5e452 | 106 | // Handle the request |
leihen | 13:aa5338a5e452 | 107 | INFO("Handling request !"); |
leihen | 13:aa5338a5e452 | 108 | HandleRequest(con.m_Msg, Clnt); |
leihen | 0:7a2421e63e74 | 109 | } |
leihen | 13:aa5338a5e452 | 110 | if (c == -1) { |
leihen | 13:aa5338a5e452 | 111 | // break; |
leihen | 13:aa5338a5e452 | 112 | } |
leihen | 13:aa5338a5e452 | 113 | #ifdef _DEBUG |
leihen | 13:aa5338a5e452 | 114 | led2 = 0; |
leihen | 13:aa5338a5e452 | 115 | led3 = 0; |
leihen | 13:aa5338a5e452 | 116 | #endif |
leihen | 13:aa5338a5e452 | 117 | |
leihen | 13:aa5338a5e452 | 118 | |
leihen | 0:7a2421e63e74 | 119 | INFO("Leaving polling thread"); |
leihen | 0:7a2421e63e74 | 120 | return 0; |
leihen | 1:6b7472d5e9ee | 121 | } |
leihen | 1:6b7472d5e9ee | 122 | |
leihen | 3:d6224049b3bf | 123 | void HTTPServer::HandleRequest(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp) |
leihen | 3:d6224049b3bf | 124 | { |
leihen | 3:d6224049b3bf | 125 | std::string localPath; |
leihen | 3:d6224049b3bf | 126 | std::map<std::string, HTTPRequestHandler*(*)(const char*, const char*, HTTPConnection::HTTPMessage&, TCPSocketConnection&), handlersComp>::const_iterator it; |
leihen | 3:d6224049b3bf | 127 | |
leihen | 4:d065642c32cc | 128 | // Iterate through registered handlers and check if the handler's path is a subset of the requested uri. |
leihen | 3:d6224049b3bf | 129 | for (it = m_lpHandlers.begin() ; it != m_lpHandlers.end() ; it++) { |
leihen | 3:d6224049b3bf | 130 | // check if this entries' path is fully contained at the beginning of the requested path |
leihen | 3:d6224049b3bf | 131 | std::string curpth = it->first; |
leihen | 3:d6224049b3bf | 132 | |
leihen | 3:d6224049b3bf | 133 | if (msg.uri.find(curpth) == 0) { |
leihen | 4:d065642c32cc | 134 | // firts matching handler found, we just take it and we'll be happy |
leihen | 3:d6224049b3bf | 135 | localPath = msg.uri.substr(curpth.length()); |
leihen | 3:d6224049b3bf | 136 | break; |
leihen | 3:d6224049b3bf | 137 | } |
leihen | 3:d6224049b3bf | 138 | } |
leihen | 13:aa5338a5e452 | 139 | |
leihen | 3:d6224049b3bf | 140 | if (it == m_lpHandlers.end()) { |
leihen | 3:d6224049b3bf | 141 | // There is no such handler, so return invalid |
leihen | 3:d6224049b3bf | 142 | |
leihen | 13:aa5338a5e452 | 143 | m_pErrorHandler(msg, tcp); |
leihen | 3:d6224049b3bf | 144 | INFO("Webrequest left unhandled."); |
leihen | 13:aa5338a5e452 | 145 | } else { |
leihen | 4:d065642c32cc | 146 | // Valid handler was found |
leihen | 3:d6224049b3bf | 147 | INFO("Routing webrequest !"); |
leihen | 4:d065642c32cc | 148 | // Instantiate the handler object (handling will be done from withing the object's constructor |
leihen | 3:d6224049b3bf | 149 | HTTPRequestHandler *phdl = (*it->second)(it->first.c_str(), localPath.c_str(), msg, tcp); |
leihen | 4:d065642c32cc | 150 | // now we can delete the object, because handling is completed. |
leihen | 3:d6224049b3bf | 151 | if (phdl != NULL) |
leihen | 3:d6224049b3bf | 152 | delete phdl; |
leihen | 3:d6224049b3bf | 153 | } |
leihen | 3:d6224049b3bf | 154 | } |