Gethostbyname, get ip address from a url?

Questions & Answers
1

I wish to know if there is any function that returns an IP Address from url.
I’m using a dynamicIP service to test connectivity.

What I will like to try is something like this:

MasterServer.ipAddress=gethostbyname(“www.dynamicIP.com”);

Thank you all

2

This will translate an URL to an IP address but only the first that is received and without error-checking!! If you don't have an internet connections / no dns server connection this will fail. If the URL doesn't exist it will fail too (of course).

// C#
using System.Net;

//[...]
public static string gethostbyname(string aURL)
{
    PHostEntry Hosts = Dns.GetHostEntry(URL);
    return Hosts.AddressList[0].ToString();
}

edit

To be more precise: It doesn’t translate an URL, only a domain-name e.g. the host-part of the URL

4

Dns.GetHostEntry does the job, but it only seems to work with bare urls like www.domain.com, no http://www.domain.com, no www.domain.com/subdir/index.html, etc.
So I’ve written this convenient function that takes pretty much any kind of url, strips away the unwanted parts and returns the IP address.

// C#
using System.Net;

public static string GetIP(string url) {

    url = url.Replace("http://", ""); //remove http://
    url = url.Replace("https://", ""); //remove https://
    url = url.Substring(0, url.IndexOf("/")); //remove everything after the first /

    try {
        IPHostEntry hosts = Dns.GetHostEntry(url);
        if(hosts.AddressList.Length > 0) return hosts.AddressList[0].ToString();
    } catch {
        Debug.Log ("Could not get IP for URL " + url);
    }

    return null;
}
3

Thank your,
It works, as you said not really well, but at least it returns the IP address.

By the way It doesnt work with web redirections.

And it is “IPHostEntry” instead of “PHostEntry”

Anyway thank you