define-private-public/HttpServer.cs

## HttpServer.cs
// Filename:  HttpServer.cs
// Author:    Benjamin N. Summerton <define-private-public>
// License:   Unlicense (http://unlicense.org/)

using System;
using System.IO;
using System.Text;
using System.Net;
using System.Threading.Tasks;

namespace HttpListenerExample
{
    class HttpServer
    {
        public static HttpListener listener;
        public static string url = "http://localhost:8000/";
        public static int pageViews = 0;
        public static int requestCount = 0;
        public static string pageData =
            "<!DOCTYPE>" +
            "<html>" +
            "  <head>" +
            "    <title>HttpListener Example</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 hasn't visited the `shutdown` url, keep on handling requests
            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();

                // If `shutdown` url requested w/ POST, then shutdown the server after serving the page
                if ((req.HttpMethod == "POST") && (req.Url.AbsolutePath == "/shutdown"))
                {
                    Console.WriteLine("Shutdown requested");
                    runServer = false;
                }

                // Make sure we don't increment the page views counter if `favicon.ico` is requested
                if (req.Url.AbsolutePath != "/favicon.ico")
                    pageViews += 1;

                // Write the response info
                string disableSubmit = !runServer ? "disabled" : "";
                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 (asynchronously), then close it
                await resp.OutputStream.WriteAsync(data, 0, data.Length);
                resp.Close();
            }
        }


        public static void Main(string[] args)
        {
            // Create a Http server and start listening for incoming connections
            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();
        }
    }
}
	// Filename: HttpServer.cs
	// Author: Benjamin N. Summerton <define-private-public>
	// License: Unlicense (http://unlicense.org/)

	using System;
	using System.IO;
	using System.Text;
	using System.Net;
	using System.Threading.Tasks;

	namespace HttpListenerExample
	{
	class HttpServer
	{
	public static HttpListener listener;
	public static string url = "http://localhost:8000/";
	public static int pageViews = 0;
	public static int requestCount = 0;
	public static string pageData =
	"<!DOCTYPE>" +
	"<html>" +
	" <head>" +
	" <title>HttpListener Example</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 hasn't visited the `shutdown` url, keep on handling requests
	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();

	// If `shutdown` url requested w/ POST, then shutdown the server after serving the page
	if ((req.HttpMethod == "POST") && (req.Url.AbsolutePath == "/shutdown"))
	{
	Console.WriteLine("Shutdown requested");
	runServer = false;
	}

	// Make sure we don't increment the page views counter if `favicon.ico` is requested
	if (req.Url.AbsolutePath != "/favicon.ico")
	pageViews += 1;

	// Write the response info
	string disableSubmit = !runServer ? "disabled" : "";
	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 (asynchronously), then close it
	await resp.OutputStream.WriteAsync(data, 0, data.Length);
	resp.Close();
	}
	}


	public static void Main(string[] args)
	{
	// Create a Http server and start listening for incoming connections
	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();
	}
	}
	}