Rob Dobson / RdWebServer

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:
25:ffa1dddd3da4
Parent:
24:27800de38eab
Child:
26:3c4c10e989b1
--- a/RdWebServer.cpp	Mon Aug 31 15:00:41 2015 +0000
+++ b/RdWebServer.cpp	Mon Sep 28 10:29:45 2015 +0000
@@ -115,13 +115,16 @@
             int rxLen = clientSocketConn.receive(_buffer, HTTPD_MAX_REQ_LENGTH);
             if (rxLen == -1)
             {
-                RD_DBG("clientSocketConn.receive() returned %d", rxLen);
                 if (_closeConnOnReceiveFail)
                 {
                     int closeRet = clientSocketConn.close();
-                    RD_DBG("Failed receive connection close() ret %d is connected %d", closeRet, clientSocketConn.is_connected());
+                    RD_DBG("Rx Timeout - conn close() ret %d (is_connected %d)", closeRet, clientSocketConn.is_connected());
                     forcedClosed = true;
                 }
+                else
+                {
+                    RD_DBG("Rx Timeout - not closing - is_connected %d", clientSocketConn.is_connected());
+                }
                 continue;
             }
             if (rxLen == 0)
@@ -241,8 +244,11 @@
         {
             char combinedFileName[MAX_FILENAME_LEN];
             strcpy(combinedFileName, _curCmdStr);
-            strcat(combinedFileName, "/");
-            strcat(combinedFileName, _curArgStr);
+            if (strlen(_curArgStr) > 0)
+            {
+                strcat(combinedFileName, "/");
+                strcat(combinedFileName, _curArgStr);
+            }
             handledOk = handleSDFileRequest(combinedFileName, _curArgStr, clientSocketConn);
         }
     }