Question

I have a text document with over 2,50,000 website URLs listed. Going through each URL, if it redirects me to a particular URL (different site), I would like to save it to another text file.

I’m C# developer and I know how to read or write to files and small bits and pieces but looking for best logic or way to do the above task and script in any programming language possible.

Answer 1

string url = "http://www.google.com";
var req = (HttpWebRequest)HttpWebRequest.Create(url);
req.AllowAutoRedirect = false;

using (var resp = req.GetResponse())
{
    var location = resp.Headers["Location"];
    if (!String.IsNullOrEmpty(location))
    {
        Console.WriteLine("url is redirected to " + location);
    }
}