The Create
method will return an HttpWebRequest
for an http/https url. The 422 status code indicates that you are somehow sending incorrect formed data to the server. GetResponse()
will throw a WebException
because you don't receive the
status code 200
.
To get the actual headers of the response you need to handle the exception
private static void Main(string[] args)
{
WebRequest request = WebRequest.Create("http://google.com/12345"); //generate 404
try
{
WebResponse response = request.GetResponse();
}
catch(WebException ex)
{
HttpWebResponse errorResponse = ex.Response as HttpWebResponse;
if (errorResponse == null)
throw; //errorResponse not of type HttpWebResponse
string responseContent = "";
using(StreamReader r = new StreamReader(errorResponse.GetResponseStream()))
{
responseContent = r.ReadToEnd();
}
Console.WriteLine("The server at {0} returned {1}", errorResponse.ResponseUri, errorResponse.StatusCode);
Console.WriteLine("With headers:");
foreach(string key in errorResponse.Headers.AllKeys)
{
Console.WriteLine("\t{0}:{1}", key, errorResponse.Headers[key]);
}
Console.WriteLine(responseContent);
}
Console.ReadLine();
}