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:
10:b4b9d4d5e5be
Parent:
9:35668248199b
Child:
11:cec51b430b20
--- a/RdWebServer.cpp	Sun Feb 22 11:54:18 2015 +0000
+++ b/RdWebServer.cpp	Sun Feb 22 22:08:13 2015 +0000
@@ -182,13 +182,11 @@
     const int HTTPD_MAX_FNAME_LENGTH = 127;
     char filename[HTTPD_MAX_FNAME_LENGTH+1];
     
-//    pc.printf("Requesting file %s\n\r", inFileName);
+    pc.printf("Requesting file %s\n\r", inFileName);
     
-    char *lstchr = strrchr(inFileName, NULL) -1;
-    if ('/' == *lstchr)
+    if ((strlen(inFileName) > 0) && (inFileName[strlen(inFileName)-1] == '/'))
     {
-        pc.printf("Request directory %s%s\n", _pBaseWebFolder, inFileName);
-        *lstchr = 0;
+        pc.printf("Request directory %s%s\r\n", _pBaseWebFolder, inFileName);
         sprintf(filename, "%s%s", _pBaseWebFolder, inFileName);
         DIR *d = opendir(filename);
         if (d != NULL) {
@@ -198,7 +196,7 @@
             client.send(httpHeader,strlen(httpHeader));
             struct dirent *p;
             while((p = readdir(d)) != NULL) {
-                pc.printf("%s\n", p->d_name);
+                pc.printf("%s\r\n", p->d_name);
                 sprintf(httpHeader,"<li>%s</li>", p->d_name);
                 client.send(httpHeader,strlen(httpHeader));
             }