David Smart / Mbed 2 deprecated SSDP_Server

An example demonstrating SSDP Discovery and a companion Web Server.

Dependencies:   mbed mbed-rtos Watchdog SW_HTTPServer SW_String EthernetInterface TimeInterface SSDP

This example program provides a framework -by- example.

It makes itself discoverable to the network using SSDP. From there, it is easy to access the embedded web server to interact with the embedded node.

The example, built on the LPC1768, provides interaction to turn the LEDs on and off via a web page that is discovered using the SSDP protocol.

It also picks up time via an NTP server.

Diff: WebPages.cpp

Revision:
1:016d4400254b
Parent:
0:de1dfa2ab813
Child:
2:ca5d12560ff7
--- a/WebPages.cpp	Tue Jul 03 02:10:23 2018 +0000
+++ b/WebPages.cpp	Tue Jul 03 16:26:21 2018 +0000
@@ -24,7 +24,7 @@
 
 
 // sprintf(buf, ROOTPAGE, "NodeName", "NodeName", "BuildDate", 
-static const char * ROOTPAGE =
+static const char ROOTPAGE[] =
     "<!DOCTYPE html>\r\n"
     "<html><head><title>%s</title>\r\n"
     "</head>\r\n"
@@ -33,10 +33,26 @@
     "This project demonstrates the Smartware web server and the Smartware SSDP discovery server.\n"
     "You should be able to scan the network (e.g. in Windows Explorer) and find this device.\n"
     "Then you can click on it to open this web page to interact with it.\n"
-    "<br/><br/>\n"
+    "<br/><br/>Build %s<br/><br/>\n"
+    "<font size='+5'>\n"
+    "<table><tr>\n"
+    "<td>"
+    "<button onclick=\"window.location.href='/?LED=1&CMD=1'\">LED 1 On</button><br/>\n"
+    "<button onclick=\"window.location.href='/?LED=1&CMD=0'\">LED 1 Off</button><br/>\n"
+    "</td><td>"
+    "<button onclick=\"window.location.href='/?LED=2&CMD=1'\">LED 2 On</button><br/>\n"
+    "<button onclick=\"window.location.href='/?LED=2&CMD=0'\">LED 2 Off</button><br/>\n"
+    "</td><td>"
+    "<button onclick=\"window.location.href='/?LED=3&CMD=1'\">LED 3 On</button><br/>\n"
+    "<button onclick=\"window.location.href='/?LED=3&CMD=0'\">LED 3 Off</button><br/>\n"
+    "</td><td>"
+    "<button onclick=\"window.location.href='/?LED=4&CMD=1'\">LED 4 On</button><br/>\n"
+    "<button onclick=\"window.location.href='/?LED=4&CMD=0'\">LED 4 Off</button><br/>\n"
+    "</td>"
+    "</tr></table>\n"
+    "</font>\n"
     "<form method='get'>\n"
     "<table>\n"
-    "<tr><td>Build</td><td>%s</td></tr>\n"
     "<tr><td>Set LED</td>\n"
     "<td><select name='LED'>\n"
     "   <option value='1'>1</option>\n"
@@ -200,9 +216,14 @@
 HTTPServer::CallBackResults RootPage(HTTPServer *svr, HTTPServer::CallBackType type, char * path,
                        const HTTPServer::namevalue *queryParams, int queryParamCount)
 {
-    char BigBuffer[1000];
+    #define bufSize (sizeof(ROOTPAGE) + 100)
+    char * BigBuffer = (char *)malloc(bufSize);
     HTTPServer::CallBackResults ret = HTTPServer::ACCEPT_ERROR;
     printf("RootPage responder\n");
+    if (!BigBuffer) {
+        printf("cannot allocate %d bytes\n", bufSize);
+        return ret;
+    }
     
     int led, cmd;
     int mask = 0;
@@ -231,7 +252,7 @@
     switch (type) {
         case HTTPServer::SEND_PAGE:
             svr->header(HTTPServer::OK, "OK", hdrTypeHTML_NoCache);
-            sprintf(BigBuffer, ROOTPAGE, PROG_NAME, PROG_NAME, BUILD_DATE);            
+            snprintf(BigBuffer, bufSize, ROOTPAGE, PROG_NAME, PROG_NAME, BUILD_DATE);            
             svr->send(BigBuffer);
             ret = HTTPServer::ACCEPT_COMPLETE;
             break;
@@ -245,5 +266,7 @@
             ret = HTTPServer::ACCEPT_ERROR;
             break;
     }
+    if (BigBuffer)
+        free(BigBuffer);
     return ret;
 }