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POReuse Connection with HttpWebRequest in C#
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copied!<p>I need to make a POST request using .Net. </p> <p>I can authenticate by GET, and so I’m trying to make a POST request on the same connection to keep my authentication.</p> <p>The problem is I get a 401 Not Authenticated exception, which implies the connection hasn’t been reused. </p> <pre><code>HttpWebRequest request = (HttpWebRequest)WebRequest.Create("my-server"); request.Credentials = new NetworkCredential("user", "password"); request.GetResponse().Close(); // Works fine // Now the request I want to make... request = (HttpWebRequest)WebRequest.Create("my-server"); request.Credentials = new NetworkCredential("user", "password"); request.Method = "post"; string postData = "param1=1&param2=2"; byte[] data = new ASCIIEncoding().GetBytes(postData); request.ContentLength = data.Length; request.ContentType = "application/x-www-form-urlencoded"; using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); stream.Close(); request.GetResponse().Close(); // This line gets a 401 Not Authorized error. } </code></pre> <p>EDIT: There has been some suggestions that I need to transfer cookies. The following doesn’t work either:</p> <pre><code>HttpWebRequest request = (HttpWebRequest)WebRequest.Create("my-server"); request.Credentials = new NetworkCredential("user", "password"); var response = (HttpWebResponse)request.GetResponse(); var cookieContainer = new CookieContainer(); foreach (Cookie cookie in response.Cookies) { cookieContainer.Add(cookie); } response.Close(); // Now the request I want to make... request = (HttpWebRequest)WebRequest.Create("my-server"); request.Credentials = new NetworkCredential("user", "password"); request.CookieContainer = cookieContainer; request.Method = "post"; string postData = "param1=1&param2=2"; byte[] data = new ASCIIEncoding().GetBytes(postData); request.ContentLength = data.Length; request.ContentType = "application/x-www-form-urlencoded"; using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); request.GetResponse().Close(); // This line gets a 401 Not Authorized error. } </code></pre>

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