A simple web server mainly based on ideas from Jasper Schuurmans Netduino web server
Dependents: RdBlindsServer SpideyWallWeb RdGasUseMonitor
A fast and reliable web server for MBED! http://robdobson.com/2015/08/a-reliable-mbed-webserver/
It has a very neat way to implement REST commands and can serve files from local storage (on LPC1768 for instance) and from SD cards. It also has a caching facility which is particularly useful for serving files from local storage.
The server can be run in the main() thread (and has a sub-2ms response time if this is done) or in a mbed-rtos thread which increases the response time to (a still respectable) 30ms or so.
The latest project that uses this is here - https://developer.mbed.org/users/Bobty/code/SpideyWallWeb/
int main (void) { // Ethernet interface EthernetInterface::init(); // Connect ethernet EthernetInterface::connect(); // Init the web server pc.printf("Starting web server\r\n"); char* baseWebFolder = "/sd/"; // should be /sd/ for SDcard files - not used for local file system RdWebServer webServer; // Add commands to handle the home page and favicon webServer.addCommand("", RdWebServerCmdDef::CMD_LOCALFILE, NULL, "index.htm", true); webServer.addCommand("favicon.ico", RdWebServerCmdDef::CMD_LOCALFILE, NULL, NULL, true); // Add the lightwall control commands webServer.addCommand("name", RdWebServerCmdDef::CMD_CALLBACK, &lightwallGetSystemName); webServer.addCommand("clear", RdWebServerCmdDef::CMD_CALLBACK, &lightwallClear); webServer.addCommand("rawfill", RdWebServerCmdDef::CMD_CALLBACK, &lightwallRawFill); webServer.addCommand("fill", RdWebServerCmdDef::CMD_CALLBACK, &lightwallFill); webServer.addCommand("showleds", RdWebServerCmdDef::CMD_CALLBACK, &lightwallShowLeds); // Start the server webServer.init(WEBPORT, &led4, baseWebFolder); webServer.run(); } // Get system name - No arguments required char* lightwallGetSystemName(int method, char*cmdStr, char* argStr, char* msgBuffer, int msgLen, int contentLen, unsigned char* pPayload, int payloadLen, int splitPayloadPos) { // Perform any required actions here .... // ... // Return the system name return systemName; }
This server was originally based on a Netduino web server from Jasper Schuurmans but has been optimised for speed.
Diff: RdWebServer.cpp
- Revision:
- 0:b5b4d07f7827
- Child:
- 1:75bb184de749
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RdWebServer.cpp Wed Sep 18 21:36:50 2013 +0000 @@ -0,0 +1,105 @@ +#include "RdWebServer.h" + +RdWebServer::RdWebServer() +{ + _serverIsListening = false; + _pStatusLed = NULL; +} + +RdWebServer::~RdWebServer() +{ +} + +bool RdWebServer::init(int port, DigitalOut* pStatusLed) +{ + _port = port; + _pStatusLed = pStatusLed; + +// _socketSrv.set_blocking(true); + + + //setup tcp socket + if(_socketSrv.bind(port)< 0) + { + printf("tcp server bind failed.\n\r"); + return false; + } + else + { + printf("tcp server bind successed.\n\r"); + _serverIsListening = true; + } + + if(_socketSrv.listen(1) < 0) + { + printf("tcp server listen failed.\n\r"); + return false; + } + else + { + printf("tcp server is listening...\n\r"); + } + + return true; +} + + +void RdWebServer::run() +{ + TCPSocketConnection client; + bool clientIsConnected = false; + + //listening for http GET request + while (isListening()) + { + //blocking mode(never timeout) + if(_socketSrv.accept(client)<0) + { + printf("failed to accept connection.\n\r"); + } + else + { + printf("connection success!\n\rIP: %s\n\r",client.get_address()); + clientIsConnected = true; + if (_pStatusLed != NULL) + *_pStatusLed = true; + + while(clientIsConnected) + { + char buffer[1024] = {}; + switch(client.receive(buffer, 1023)) + { + case 0: + printf("recieved buffer is empty.\n\r"); + clientIsConnected = false; + break; + case -1: + printf("failed to read data from client.\n\r"); + clientIsConnected = false; + break; + default: + printf("Recieved Data: %d\n\r\n\r%.*s\n\r",strlen(buffer),strlen(buffer),buffer); + if(buffer[0] == 'G' && buffer[1] == 'E' && buffer[2] == 'T' ) + { + printf("GET request incomming.\n\r"); + + + //setup http response header & data + char echoHeader[256] = {}; + sprintf(echoHeader,"HTTP/1.1 200 OK\n\rContent-Length: %d\n\rContent-Type: text\n\rConnection: Close\n\r\n\r",strlen(buffer)); + client.send(echoHeader,strlen(echoHeader)); + client.send(buffer,strlen(buffer)); + clientIsConnected = false; + printf("echo back done.\n\r"); + } + break; + } + } + printf("close connection.\n\rtcp server is listening...\n\r"); + client.close(); + if (_pStatusLed != NULL) + *_pStatusLed = false; + } + } +} +