c# - WebRequest "HEAD" light weight alternative

Question

I recently discovered that the following does not work with certain sites, such as IMDB.com.

class Program
    {
        static void Main(string[] args)
        {
            try
            {
                System.Net.WebRequest wc = System.Net.WebRequest.Create("http://www.imdb.com"); //args[0]);

                ((HttpWebRequest)wc).UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/0.2.153.1 Safari/525.19";
                wc.Timeout = 1000;
                wc.Method = "HEAD";
                WebResponse res = wc.GetResponse();
                var streamReader = new System.IO.StreamReader(res.GetResponseStream());

                Console.WriteLine(streamReader.ReadToEnd());
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }

It returns an HTTP 405 ( Method Not Allowed ). My problem is, I use code very similar to the above to check if a link is valid and the vast majority of times it works correctly. I can switch it to method equal GET and it works ( with an increase in timeout ), but this slows things down by an order of magnitude. I am assuming the 405 response is a server configuration on IMDB's server side.

Is there a way for me to do the same thing as above, in a light weight manner in .NET? Or, is there a way to fix the above code so it works as a GET request that works with imdb?

Answer 1

Open the connection yourself with a socket (instead of an HttpRequest or WebClient), and close the stream as soon as you've read the status code. Fortunately the status code comes near the top of the response stream :)