khoahuynhdev/HttpListenerDemo.cs

## HttpListenerDemo.cs
using System;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace HttpListenerExample
{
    class Program
    {
        public static HttpListener listener;
        public static string url = @"http://localhost:3000/";

        public static int pageViews = 0;
        public static int requestCount = 0;
        public static string pageData =
            "<!DOCTYPE>" +
            "<html>" +
            "  <head>" +
            "    <title>HttpListener</title>" +
            "  </head>" +
            "  <body>" +
            "    <p>Page Views: {0}</p>" +
            "    <form method=\"post\" action=\"shutdown\">" +
            "      <input type=\"submit\" value=\"Shutdown\" {1}>" +
            "    </form>" +
            "  </body>" +
            "</html>";

        public static async Task HandleIncomingConnections()
        {
            bool runServer = true;
            // while a user haven't visitted the shutdown url, keep on handling request
            while (runServer)
            {
                // will wait here until we hear from a connection
                HttpListenerContext ctx = await listener.GetContextAsync();

                // peel out the requests and response objects
                HttpListenerRequest req = ctx.Request;
                HttpListenerResponse resp = ctx.Response;

                // print out some info about the request
                Console.WriteLine("Request #{0}", ++requestCount);
                Console.WriteLine(req.Url.ToString());
                Console.WriteLine(req.HttpMethod);
                Console.WriteLine(req.UserHostName);
                Console.WriteLine(req.UserAgent);
                Console.WriteLine(req.UserHostAddress);
                Console.WriteLine();

                // if 'shutdown' url requested with POST, then shutdown the server after serving the page
                if (req.HttpMethod == "POST" && req.Url.AbsolutePath == @"/shutdown")
                {
                    Console.WriteLine("shutdown the server");
                    runServer = false;
                    continue;
                }
                // make sure don't increse view page count if favicon.ico is requested
                if (req.Url.AbsolutePath != @"/favicon.ico")
                    pageViews++;
                // write the response info
                string disableSubmit = !runServer ? "disable" : "";
                byte[] data = Encoding.UTF8.GetBytes(String.Format(pageData, pageViews, disableSubmit));
                resp.ContentType = "text/html";
                resp.ContentEncoding = Encoding.UTF8;
                resp.ContentLength64 = data.LongLength;
                // write out to the response stream (async) and close
                await resp.OutputStream.WriteAsync(data, 0, data.Length);
                resp.Close();
                //Thread.Sleep(TimeSpan.FromSeconds(15));
            }
        }
        static void Main(string[] args)
        {
            // create a http server and start listening
            listener = new HttpListener();
            listener.Prefixes.Add(url);
            listener.Start();
            Console.WriteLine("Listening for connections on {0}", url);

            // handle requests
            Task listenTask = HandleIncomingConnections();
            listenTask.GetAwaiter().GetResult();

            // close the listener
            listener.Close();
        }
    }
}
	using System;
	using System.Net;
	using System.Text;
	using System.Threading.Tasks;

	namespace HttpListenerExample
	{
	class Program
	{
	public static HttpListener listener;
	public static string url = @"http://localhost:3000/";

	public static int pageViews = 0;
	public static int requestCount = 0;
	public static string pageData =
	"<!DOCTYPE>" +
	"<html>" +
	" <head>" +
	" <title>HttpListener</title>" +
	" </head>" +
	" <body>" +
	" <p>Page Views: {0}</p>" +
	" <form method=\"post\" action=\"shutdown\">" +
	" <input type=\"submit\" value=\"Shutdown\" {1}>" +
	" </form>" +
	" </body>" +
	"</html>";

	public static async Task HandleIncomingConnections()
	{
	bool runServer = true;
	// while a user haven't visitted the shutdown url, keep on handling request
	while (runServer)
	{
	// will wait here until we hear from a connection
	HttpListenerContext ctx = await listener.GetContextAsync();

	// peel out the requests and response objects
	HttpListenerRequest req = ctx.Request;
	HttpListenerResponse resp = ctx.Response;

	// print out some info about the request
	Console.WriteLine("Request #{0}", ++requestCount);
	Console.WriteLine(req.Url.ToString());
	Console.WriteLine(req.HttpMethod);
	Console.WriteLine(req.UserHostName);
	Console.WriteLine(req.UserAgent);
	Console.WriteLine(req.UserHostAddress);
	Console.WriteLine();

	// if 'shutdown' url requested with POST, then shutdown the server after serving the page
	if (req.HttpMethod == "POST" && req.Url.AbsolutePath == @"/shutdown")
	{
	Console.WriteLine("shutdown the server");
	runServer = false;
	continue;
	}
	// make sure don't increse view page count if favicon.ico is requested
	if (req.Url.AbsolutePath != @"/favicon.ico")
	pageViews++;
	// write the response info
	string disableSubmit = !runServer ? "disable" : "";
	byte[] data = Encoding.UTF8.GetBytes(String.Format(pageData, pageViews, disableSubmit));
	resp.ContentType = "text/html";
	resp.ContentEncoding = Encoding.UTF8;
	resp.ContentLength64 = data.LongLength;
	// write out to the response stream (async) and close
	await resp.OutputStream.WriteAsync(data, 0, data.Length);
	resp.Close();
	//Thread.Sleep(TimeSpan.FromSeconds(15));
	}
	}
	static void Main(string[] args)
	{
	// create a http server and start listening
	listener = new HttpListener();
	listener.Prefixes.Add(url);
	listener.Start();
	Console.WriteLine("Listening for connections on {0}", url);

	// handle requests
	Task listenTask = HandleIncomingConnections();
	listenTask.GetAwaiter().GetResult();

	// close the listener
	listener.Close();
	}
	}
	}