This is a HTTP Server example using the new EthernetInterface and new mbed-rpc libraries.
Dependents: HTTP-RPCServerExample
Fork of HTTPServer by
HTTPServer.cpp
- Committer:
- leihen
- Date:
- 2013-05-28
- Revision:
- 4:d065642c32cc
- Parent:
- 3:d6224049b3bf
- Child:
- 5:dc88012caef1
File content as of revision 4:d065642c32cc:
#include "mbed.h" #include "HTTPServer.h" #define _DEBUG 1 #ifdef _DEBUG DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); DigitalOut led4(LED4); #endif #if (_DEBUG && !defined(TARGET_LPC11U24)) #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__); #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__); #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__); #else #define INFO(x, ...) #define WARN(x, ...) #define ERR(x, ...) #endif /* Constructor */ /* initialize all members and set the standard error handler. */ HTTPServer::HTTPServer(Serial *dbg) { m_pDbg = dbg; m_pSvr = NULL; m_pErrorHandler = StdErrorHandler; } HTTPServer::~HTTPServer() { if (m_pSvr) { delete m_pSvr; m_pSvr = NULL; } } 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"; void HTTPServer::StdErrorHandler(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp) { char echoHeader[256]; tcp.set_blocking(true, 1500); 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)); tcp.send(echoHeader, strlen(echoHeader)); tcp.send((char*)szStdErrorPage, strlen(szStdErrorPage)); } int HTTPServer::start(int port) { // check if the start member was called already once if (m_pSvr != NULL) { ERR("start function was already called, server is already in listening state."); return -1; } // Create a new server object m_pSvr = new TCPSocketServer(); // Bind the local server to the given port if (m_pSvr->bind(port) < 0) { ERR("Failed to bind to port %d\n", port); return -1; } else { INFO("Binding succeeded !\n"); } // Listen to a maximum of 10 concurrent connections if (m_pSvr->listen(1) < 0) { ERR("Faild to listen !\n"); delete m_pSvr; m_pSvr = NULL; return -1; } else { INFO("Listening\n"); } // set into non blocking operation m_pSvr->set_blocking(false, 100); return 0; } int HTTPServer::poll() { INFO("Listening for new connection requests."); // This thread basically checks if there is a new incoming connection. // If so , a new HTTPConnection is created and the connection thread is started. TCPSocketConnection Clnt; #ifdef _DEBUG led4 = 1; // Indicate we are waiting for a new connection #endif if (m_pSvr->accept(Clnt) < 0) { // an error occured ERR("There was an error, Accept returned with an error. Probably the connection to the router was lost. Shutting down server"); #ifdef _DEBUG led2 = 0; #endif m_pSvr->close(); delete m_pSvr; m_pSvr = NULL; #ifdef _DEBUG led4 = 0; led3 = 1; // ERROR led2 = 0; led1 = 0; #endif return -1; } else { #ifdef _DEBUG led4 = 0; #endif // a new connection was received INFO("Client (IP=%s) is connected !\n", Clnt.get_address()); // Start the main connection thread #ifdef _DEBUG led3 = 1; led2 = 1; #endif HTTPConnection con; int c = con.poll(); if (c == 0) { // Handle the request HandleRequest(con.m_Msg, Clnt); } #ifdef _DEBUG led2 = 0; led3 = 0; #endif } INFO("Leaving polling thread"); return 0; } void HTTPServer::HandleRequest(HTTPConnection::HTTPMessage& msg, TCPSocketConnection& tcp) { std::string localPath; std::map<std::string, HTTPRequestHandler*(*)(const char*, const char*, HTTPConnection::HTTPMessage&, TCPSocketConnection&), handlersComp>::const_iterator it; // Iterate through registered handlers and check if the handler's path is a subset of the requested uri. for (it = m_lpHandlers.begin() ; it != m_lpHandlers.end() ; it++) { // check if this entries' path is fully contained at the beginning of the requested path std::string curpth = it->first; if (msg.uri.find(curpth) == 0) { // firts matching handler found, we just take it and we'll be happy localPath = msg.uri.substr(curpth.length()); break; } } if (it == m_lpHandlers.end()) { // There is no such handler, so return invalid m_pErrorHandler(msg, tcp); INFO("Webrequest left unhandled."); } else { // Valid handler was found INFO("Routing webrequest !"); // Instantiate the handler object (handling will be done from withing the object's constructor HTTPRequestHandler *phdl = (*it->second)(it->first.c_str(), localPath.c_str(), msg, tcp); // now we can delete the object, because handling is completed. if (phdl != NULL) delete phdl; } }