HTTP header

/*
  Web  Server
 
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield. 
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 
 created 18 Dec 2009
 by David A. Mellis
 modified 4 Sep 2010
 by Tom Igoe
 
 */

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xDF, 0xDE, 0xEE };
byte ip[] = { 192,168,1, 177 };

// Initialize the Ethernet server library
// with the IP address and port you want to use 
// (port 80 is default for HTTP):
Server server(80);

void setup()
{
  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.begin(9600);
}

void loop()
{
  // listen for incoming clients
  Client client = server.available();
  if (client) {
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    char post_data[100];
    byte index = 0;
    
    if (client.connected()) {
      
      while( client.available() ) {
        char c = client.read();
        if ( c != '\r' && c != '\n' ) {
          post_data[index++] = c;
        } else {
          if( c == '\r' ) {
            Serial.print("Dados: ");
            Serial.println(post_data);
          }
          memset(post_data, 0, 100);
          index = 0;
        }
        //Serial.print(c);
      }
      Serial.print("Dados: ");
      Serial.println(post_data);
      
      // send a standard http response header
      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.println();

      // output the value of each analog input pin
      for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
        client.print("analog input ");
        client.print(analogChannel);
        client.print(" is ");
        client.print(analogRead(analogChannel));
        client.println("<br />");
      }
      
      client.println("<form action='./' method='post'><input type='text' name='nome' value='m3nd3s' /><input type='text' name='email' value='m3nd3s' /> <input type='submit' value='Vai!' /></form>");
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
  }
}