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.h

Revision:
18:5de680c4cfcb
Parent:
17:080f2bed8b36
Child:
19:f67ac231b570
--- a/RdWebServer.h	Mon May 11 11:17:15 2015 +0000
+++ b/RdWebServer.h	Mon May 11 14:26:54 2015 +0000
@@ -10,6 +10,7 @@
 #include "mbed.h"
 #include "EthernetInterface.h"
 
+// Debug level
 #ifdef RDWEB_DEBUG 
 #if (RDWEB_DEBUG > 3)
 #define RD_DBG(x, ...) std::printf("[RD_DBG: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
@@ -50,15 +51,10 @@
 #define RD_ERR(x, ...)
 #endif
 
-//#define SUPPORT_LOCAL_FILESYSTEM 1
-//#define SUPPORT_FOLDER_VIEW 1
-//#define SUPPORT_LOCAL_FILE_CACHE 1
 const int SUBST_MAX_FNAME_LEN = 40;  // note local files on MBED are 8.3 but this might include other files
 
 extern RawSerial pc;
 
-#ifdef SUPPORT_LOCAL_FILE_CACHE
-
 class RdFileCacheEntry
 {
     public:
@@ -81,8 +77,6 @@
         int _nFileLen;
 };
 
-#endif
-
 typedef char* (*CmdCallbackType)(int method, char*cmdStr, char* argStr);
 
 class RdWebServerCmdDef
@@ -133,9 +127,7 @@
         TCPSocketServer _serverSocket;
         bool _initOk;
         std::vector<RdWebServerCmdDef*> _commands;
-#ifdef SUPPORT_LOCAL_FILE_CACHE
         std::vector<RdFileCacheEntry*> _cachedFiles;
-#endif
         bool extractCmdArgs(char* buf, char* pCmdStr, int maxCmdStrLen, char* pArgStr, int maxArgStrLen);
         char* _pBaseWebFolder;
         char _httpHeader[HTTPD_MAX_HDR_LENGTH+1];
@@ -144,9 +136,7 @@
         bool handleLocalFileRequest(char* cmdStr, char* argStr, TCPSocketConnection &client, bool bCacheIfPossible);
         bool handleSDFileRequest(char* cmdStr, char* argStr, TCPSocketConnection &client);
         void handleCGIRequest(char* pUriStr, char* pQueryStr);
-#ifdef SUPPORT_LOCAL_FILE_CACHE
         void sendFromCache(RdFileCacheEntry* pCacheEntry, TCPSocketConnection &client);
-#endif
         bool handleReceivedHttp(TCPSocketConnection &client);
         void formHTTPHeader(const char* rsltCode, const char* contentType, int contentLen);