Creating a website with An Arduino Ethernet Shield

1#include <SPI.h>
2#include <Ethernet.h>
3
4// MAC address for shield
5byte   mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
6EthernetServer server(80); //   Using port 80
7int led = 7; // LED attached to pin 7
8void setup() {
9  pinMode(led,   OUTPUT); // Led set as an output
10  Ethernet.begin(mac); // Start the Ethernet   shield
11  server.begin();
12  Serial.begin(9600); // Start serial communication
13   Serial.println("Server address:"); // Print server address
14  // (Arduino   shield)
15  Serial.println(Ethernet.localIP());
16}
17void loop() {
18  EthernetClient   client = server.available();
19  if (client) {
20    boolean currentLineIsBlank   = true;
21    String buffer = "";
22    while (client.connected()) {
23      if   (client.available()) {
24        char c = client.read(); // Read from the Ethernet   shield
25        buffer += c; // Add character to string buffer
26        // Client   sent request, now waiting for response
27        if (c == '\
28' && currentLineIsBlank)   {
29          client.println("HTTP/1.1 200 OK"); // HTTP response
30          client.println("Content-Type:   text/html");
31          client.println(); // HTML code
32          client.print("<center><br><h1>Internet   Controlled Led </h1><br><br><br><FORM>");
33          client.print("<P> <INPUT   type=\\"submit\\" name=\\"status\\" value=\\"ON\\">");
34          client.print("<P>   <INPUT type=\\"submit\\" name=\\"status\\" value=\\"OFF\\">");
35          client.print("</FORM></center>");
36           break;
37        }
38        if (c == '\
39') {
40          currentLineIsBlank   = true;
41          buffer = "";
42        }
43        else if (c == '\
44')   { // Command from webpage
45          // Did the on button get pressed
46          if   (buffer.indexOf("GET /?status=ON") >= 0)
47            digitalWrite(led, HIGH);
48           // Did the off button get pressed
49          if (buffer.indexOf("GET   /?status=OFF") >= 0)
50            digitalWrite(led, LOW);
51        }
52        else   {
53          currentLineIsBlank = false;
54        }
55      }
56    }
57     client.stop(); // End server
58  }
59}