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HttpListener.IsSupported Property
.NET Framework 3.0
Gets a value that indicates whether HttpListener can be used with the current operating system.
Namespace: System.Net
Assembly: System (in system.dll)
Assembly: System (in system.dll)
The following code example demonstrates the use of the IsSupported property to detect whether an HttpListener object can be used with the current operating system.
// 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."); return; } // URI prefixes are required, // for example "http://contoso.com:8080/index/". 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) { listener.Prefixes.Add(s); } listener.Start(); Console.WriteLine("Listening..."); // 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; output.Write(buffer,0,buffer.Length); // You must close the output stream. output.Close(); listener.Stop(); }
// This example requires the System and System.Net namespaces.
public static void SimpleListenerExample(String prefixes[])
{
if (!(HttpListener.get_IsSupported())) {
Console.WriteLine("Windows XP SP2 or Server 2003 is required to "
+ "use the HttpListener class.");
return;
}
// URI prefixes are required,
// for example "http://contoso.com:8080/index/".
if (prefixes == null || prefixes.get_Length() == 0) {
throw new ArgumentException("prefixes");
}
// Create a listener.
HttpListener listener = new HttpListener();
// Add the prefixes.
for (int iCtr = 0; iCtr < prefixes.get_Length(); iCtr++) {
String s = prefixes[iCtr];
listener.get_Prefixes().Add(s);
}
listener.Start();
Console.WriteLine("Listening...");
// Note: The GetContext method blocks while waiting for a request.
HttpListenerContext context = listener.GetContext();
HttpListenerRequest request = context.get_Request();
// Obtain a response object.
HttpListenerResponse response = context.get_Response();
// Construct a response.
String responseString = "<HTML><BODY> Hello world!</BODY></HTML>";
ubyte buffer[] = System.Text.Encoding.get_UTF8().GetBytes(responseString);
// Get a response stream and write the response to it.
response.set_ContentLength64(buffer.get_Length());
System.IO.Stream output = response.get_OutputStream();
output.Write(buffer, 0, buffer.get_Length());
// You must close the output stream.
output.Close();
listener.Stop();
} //SimpleListenerExample
