Ethernet Server - How To Get Incoming URL

Other Hardware Home Automation
1

Hello,

I have an uno + ethernet shield (w5100) and I am trying to get the incoming url coming into the url

i paste this url in my browser http://10.0.0.77/led1/on and I would like a string that has that url inside the arduino. Is this possible?

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

// network configuration.  gateway and subnet are optional.

 // the media access control (ethernet hardware) address for the shield:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };  
//the IP address for the shield:
byte ip[] = { 10, 0, 0, 177 };    
// the router's gateway address:
byte gateway[] = { 10, 0, 0, 1 };
// the subnet:
byte subnet[] = { 255, 255, 0, 0 };

// telnet defaults to port 23
EthernetServer server = EthernetServer(23);

void setup()
{
  // initialize the ethernet device
  Ethernet.begin(mac, ip, gateway, subnet);

  // start listening for clients
  server.begin();
}

void loop()
{
  // if an incoming client connects, there will be bytes available to read:
  EthernetClient client = server.available();
  if (client == true) {
    // read bytes from the incoming client and write them back
    // to any clients connected to the server:
    server.write(client.read());
  }
}

Thanks in advance

2

The below has a discussion on getting the remote IP address.

http://forum.arduino.cc/index.php/topic,82416.0.html

3

Thanks but I am not looking for the IP address. I am looking for the url.

If in my example I browsed to http://10.0.0.77/led1/on on the arduino

I am interested in "/led1/on"

4

I am interested in "/led1/on"

What is your interest in this? If you capture what the browser sent, then that will be included.

5

@Everydaydiesal- do you not get "led/on" in the string read from client.read()? Try this fragment inside your loop and see the results. (from Ethernet - Arduino Reference)

if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }
6

The only way to get the original URL is to parse the request for the "Host:" variable, and this is not as reliable as you think. By the time the server gets the request, the web browser has performed a dns resolution on the domain name, and sends the request to the resolved IP address.

7

Hi

This is an example of the http request for my application received by an Arduino EthernetClient object that you can read and parse:

GET /15330/ HTTP/1.1
ACCEPT: TEXT/HTML, APPLICATION/XHTML+XML, */*
REFERER: HTTP://WWW.2WG.CO.NZ/
ACCEPT-LANGUAGE: EN-US
USER-AGENT: MOZILLA/5.0 (WINDOWS NT 6.1; WOW64; TRIDENT/7.0; RV:11.0) LIKE GECKO
ACCEPT-ENCODING: GZIP, DEFLATE
HOST: WWW.2WG.CO.NZ
DNT: 1
CONNECTION: KEEP-ALIVE 
<<AND A BLANK LINE HERE>>

The user typed http://www.2wg.co.nz/15330/ into their browser. The /15330/ URL is listed in the first line of the http request prefixed by the request type (GET, POST, etc) and terminated by HTTP/1.1

Is this what you are after?

Cheers

Catweazle NZ

8

Yes it is. thanks cat!