University of Plymouth - Stages 1, 2 and 3 / Mbed OS Task671-mbedos-FZ429-TCP-dynamic

Simple TCP/IP Server (dynamic web page)

Dependents:   TASKHTML

Diff: main.cpp

Revision:
0:65ff7ad381e8
Child:
1:76bd6f78cabc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Nov 20 17:31:23 2017 +0000
@@ -0,0 +1,82 @@
+#if !FEATURE_LWIP
+    #error [NOT_SUPPORTED] LWIP not supported for this target
+#endif
+
+#include "mbed.h"
+#include "EthernetInterface.h"
+#include "TCPServer.h"
+#include "TCPSocket.h"
+#include <iostream>
+#include <string> 
+
+#define HTTP_STATUS_LINE "HTTP/1.0 200 OK"
+#define HTTP_HEADER_FIELDS "Content-Type: text/html; charset=utf-8"
+#define HTTP_MESSAGE_BODY1 ""                                    \
+"<html>" "\r\n"                                                  \
+"  <body style=\"display:flex;text-align:center\">" "\r\n"       \
+"    <div style=\"margin:auto\">" "\r\n"                         \
+"      <h1>Hello World</h1>" "\r\n"                              \
+"      <p>The POT value is "                                     
+
+#define HTTP_MESSAGE_BODY2 ""                                    \
+       "</p>" "\r\n"                                             \
+"    </div>" "\r\n"                                              \
+"  </body>" "\r\n"                                               \
+"</html>"
+
+#define HTTP_RESPONSE HTTP_STATUS_LINE "\r\n"   \
+                      HTTP_HEADER_FIELDS "\r\n" \
+                      "\r\n"                    \
+                      HTTP_MESSAGE_BODY "\r\n"
+
+#define IP        "10.0.0.10"
+#define NETMASK   "255.0.0.0"
+#define GATEWAY   "10.0.0.1"
+
+AnalogIn pot(PA_0);
+
+
+int main()
+{
+    printf("Basic HTTP server example\n");
+    
+    //Configure an ethernet connection
+    EthernetInterface eth;
+    eth.set_network(IP, NETMASK, GATEWAY);
+    eth.connect();
+    printf("The target IP address is '%s'\n", eth.get_ip_address());
+    
+    //Now setup a web server
+    TCPServer srv;           //TCP/IP Server
+    TCPSocket clt_sock;      //Socket for communication
+    SocketAddress clt_addr;  //Address of incoming connection
+    
+    /* Open the server on ethernet stack */
+    srv.open(&eth);
+    
+    /* Bind the HTTP port (TCP 80) to the server */
+    srv.bind(eth.get_ip_address(), 80);
+    
+    /* Can handle 5 simultaneous connections */
+    srv.listen(5);
+    
+    while (true) {
+        using namespace std;
+        //Block and wait on an incoming connection
+        srv.accept(&clt_sock, &clt_addr);
+        printf("accept %s:%d\n", clt_addr.get_ip_address(), clt_addr.get_port());
+        
+        string response;
+        char pot_str[64];
+        float u = pot;
+        sprintf(pot_str, "%5.3f", u );
+        printf("POT: %5.3f\n\r", u);
+        
+        response = HTTP_MESSAGE_BODY1;
+        response += pot_str;
+        response += HTTP_MESSAGE_BODY2;
+        
+        //Send static HTML response
+        clt_sock.send(response.c_str(), response.size()+6);    
+    }
+}