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.

Committer:
Bobty
Date:
Wed Sep 18 21:36:50 2013 +0000
Revision:
0:b5b4d07f7827
Child:
1:75bb184de749
Initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bobty 0:b5b4d07f7827 1 #include "RdWebServer.h"
Bobty 0:b5b4d07f7827 2
Bobty 0:b5b4d07f7827 3 RdWebServer::RdWebServer()
Bobty 0:b5b4d07f7827 4 {
Bobty 0:b5b4d07f7827 5 _serverIsListening = false;
Bobty 0:b5b4d07f7827 6 _pStatusLed = NULL;
Bobty 0:b5b4d07f7827 7 }
Bobty 0:b5b4d07f7827 8
Bobty 0:b5b4d07f7827 9 RdWebServer::~RdWebServer()
Bobty 0:b5b4d07f7827 10 {
Bobty 0:b5b4d07f7827 11 }
Bobty 0:b5b4d07f7827 12
Bobty 0:b5b4d07f7827 13 bool RdWebServer::init(int port, DigitalOut* pStatusLed)
Bobty 0:b5b4d07f7827 14 {
Bobty 0:b5b4d07f7827 15 _port = port;
Bobty 0:b5b4d07f7827 16 _pStatusLed = pStatusLed;
Bobty 0:b5b4d07f7827 17
Bobty 0:b5b4d07f7827 18 // _socketSrv.set_blocking(true);
Bobty 0:b5b4d07f7827 19
Bobty 0:b5b4d07f7827 20
Bobty 0:b5b4d07f7827 21 //setup tcp socket
Bobty 0:b5b4d07f7827 22 if(_socketSrv.bind(port)< 0)
Bobty 0:b5b4d07f7827 23 {
Bobty 0:b5b4d07f7827 24 printf("tcp server bind failed.\n\r");
Bobty 0:b5b4d07f7827 25 return false;
Bobty 0:b5b4d07f7827 26 }
Bobty 0:b5b4d07f7827 27 else
Bobty 0:b5b4d07f7827 28 {
Bobty 0:b5b4d07f7827 29 printf("tcp server bind successed.\n\r");
Bobty 0:b5b4d07f7827 30 _serverIsListening = true;
Bobty 0:b5b4d07f7827 31 }
Bobty 0:b5b4d07f7827 32
Bobty 0:b5b4d07f7827 33 if(_socketSrv.listen(1) < 0)
Bobty 0:b5b4d07f7827 34 {
Bobty 0:b5b4d07f7827 35 printf("tcp server listen failed.\n\r");
Bobty 0:b5b4d07f7827 36 return false;
Bobty 0:b5b4d07f7827 37 }
Bobty 0:b5b4d07f7827 38 else
Bobty 0:b5b4d07f7827 39 {
Bobty 0:b5b4d07f7827 40 printf("tcp server is listening...\n\r");
Bobty 0:b5b4d07f7827 41 }
Bobty 0:b5b4d07f7827 42
Bobty 0:b5b4d07f7827 43 return true;
Bobty 0:b5b4d07f7827 44 }
Bobty 0:b5b4d07f7827 45
Bobty 0:b5b4d07f7827 46
Bobty 0:b5b4d07f7827 47 void RdWebServer::run()
Bobty 0:b5b4d07f7827 48 {
Bobty 0:b5b4d07f7827 49 TCPSocketConnection client;
Bobty 0:b5b4d07f7827 50 bool clientIsConnected = false;
Bobty 0:b5b4d07f7827 51
Bobty 0:b5b4d07f7827 52 //listening for http GET request
Bobty 0:b5b4d07f7827 53 while (isListening())
Bobty 0:b5b4d07f7827 54 {
Bobty 0:b5b4d07f7827 55 //blocking mode(never timeout)
Bobty 0:b5b4d07f7827 56 if(_socketSrv.accept(client)<0)
Bobty 0:b5b4d07f7827 57 {
Bobty 0:b5b4d07f7827 58 printf("failed to accept connection.\n\r");
Bobty 0:b5b4d07f7827 59 }
Bobty 0:b5b4d07f7827 60 else
Bobty 0:b5b4d07f7827 61 {
Bobty 0:b5b4d07f7827 62 printf("connection success!\n\rIP: %s\n\r",client.get_address());
Bobty 0:b5b4d07f7827 63 clientIsConnected = true;
Bobty 0:b5b4d07f7827 64 if (_pStatusLed != NULL)
Bobty 0:b5b4d07f7827 65 *_pStatusLed = true;
Bobty 0:b5b4d07f7827 66
Bobty 0:b5b4d07f7827 67 while(clientIsConnected)
Bobty 0:b5b4d07f7827 68 {
Bobty 0:b5b4d07f7827 69 char buffer[1024] = {};
Bobty 0:b5b4d07f7827 70 switch(client.receive(buffer, 1023))
Bobty 0:b5b4d07f7827 71 {
Bobty 0:b5b4d07f7827 72 case 0:
Bobty 0:b5b4d07f7827 73 printf("recieved buffer is empty.\n\r");
Bobty 0:b5b4d07f7827 74 clientIsConnected = false;
Bobty 0:b5b4d07f7827 75 break;
Bobty 0:b5b4d07f7827 76 case -1:
Bobty 0:b5b4d07f7827 77 printf("failed to read data from client.\n\r");
Bobty 0:b5b4d07f7827 78 clientIsConnected = false;
Bobty 0:b5b4d07f7827 79 break;
Bobty 0:b5b4d07f7827 80 default:
Bobty 0:b5b4d07f7827 81 printf("Recieved Data: %d\n\r\n\r%.*s\n\r",strlen(buffer),strlen(buffer),buffer);
Bobty 0:b5b4d07f7827 82 if(buffer[0] == 'G' && buffer[1] == 'E' && buffer[2] == 'T' )
Bobty 0:b5b4d07f7827 83 {
Bobty 0:b5b4d07f7827 84 printf("GET request incomming.\n\r");
Bobty 0:b5b4d07f7827 85
Bobty 0:b5b4d07f7827 86
Bobty 0:b5b4d07f7827 87 //setup http response header & data
Bobty 0:b5b4d07f7827 88 char echoHeader[256] = {};
Bobty 0:b5b4d07f7827 89 sprintf(echoHeader,"HTTP/1.1 200 OK\n\rContent-Length: %d\n\rContent-Type: text\n\rConnection: Close\n\r\n\r",strlen(buffer));
Bobty 0:b5b4d07f7827 90 client.send(echoHeader,strlen(echoHeader));
Bobty 0:b5b4d07f7827 91 client.send(buffer,strlen(buffer));
Bobty 0:b5b4d07f7827 92 clientIsConnected = false;
Bobty 0:b5b4d07f7827 93 printf("echo back done.\n\r");
Bobty 0:b5b4d07f7827 94 }
Bobty 0:b5b4d07f7827 95 break;
Bobty 0:b5b4d07f7827 96 }
Bobty 0:b5b4d07f7827 97 }
Bobty 0:b5b4d07f7827 98 printf("close connection.\n\rtcp server is listening...\n\r");
Bobty 0:b5b4d07f7827 99 client.close();
Bobty 0:b5b4d07f7827 100 if (_pStatusLed != NULL)
Bobty 0:b5b4d07f7827 101 *_pStatusLed = false;
Bobty 0:b5b4d07f7827 102 }
Bobty 0:b5b4d07f7827 103 }
Bobty 0:b5b4d07f7827 104 }
Bobty 0:b5b4d07f7827 105