HttpListenerRequest Class

Note: This class is new in the .NET Framework version 2.0.

Describes an incoming HTTP request to an HttpListener object. This class cannot be inherited.

Namespace: System.Net
Assembly: System (in system.dll)

public sealed class HttpListenerRequest
public final class HttpListenerRequest
public final class HttpListenerRequest

When a client makes a request to a Uniform Resource Identifier (URI) handled by an HttpListener object, the HttpListener provides a HttpListenerContext object that contains information about the sender, the request, and the response that is sent to the client. The HttpListenerContext.Request property returns the HttpListenerRequest object that describes the request.

The HttpListenerRequest object contains information about the request, such as the request HttpMethod string, UserAgent string, and request body data (see the InputStream property).

To reply to the request, you must get the associated response using the Response property.

The following code example demonstrates how to receive and respond to a HttpListenerRequest.

// This example requires the System and System.Net namespaces.
public static void SimpleListenerExample(string[] prefixes)
    if (!HttpListener.IsSupported)
        Console.WriteLine ("Windows XP SP2 or Server 2003 is required to use the HttpListener class.");
    // URI prefixes are required,
    // for example "".
    if (prefixes == null || prefixes.Length == 0)
      throw new ArgumentException("prefixes");
    // Create a listener.
    HttpListener listener = new HttpListener();
    // Add the prefixes.
    foreach (string s in prefixes)
    // Note: The GetContext method blocks while waiting for a request. 
    HttpListenerContext context = listener.GetContext();
    HttpListenerRequest request = context.Request;
    // Obtain a response object.
    HttpListenerResponse response = context.Response;
    // Construct a response.
    string responseString = "<HTML><BODY> Hello world!</BODY></HTML>";
    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
    // Get a response stream and write the response to it.
    response.ContentLength64 = buffer.Length;
    System.IO.Stream output = response.OutputStream;
    // You must close the output stream.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2003, Windows XP Media Center Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0