samples/HTTP/HttpListener/Program.cs

﻿//
// Copyright (c) .NET Foundation and Contributors
// See LICENSE file in the project root for full license information.
//

using nanoFramework.Networking;
using System;
using System.Diagnostics;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Threading;

#if HAS_WIFI
using System.Device.Wifi;
#endif

namespace HttpSamples.HttpListenerSample
{
    public class Program
    {
#if HAS_WIFI
        private static string MySsid = "ssid";
        private static string MyPassword = "password";      
#endif

        public static void Main()
        {
            X509Certificate _myWebServerCertificate509 = new X509Certificate2(_myWebServerCrt, _myWebServerPrivateKey, "");

            Debug.WriteLine("Waiting for network up, IP address and valid date & time...");

            bool success;
            CancellationTokenSource cs = new(60000);

#if HAS_WIFI

            // if the device doesn't have the Wifi credentials stored
            success = WifiNetworkHelper.ConnectDhcp(MySsid, MyPassword, requiresDateTime: true, token: cs.Token);

            /////////////////////////////////////////////////////////////////////////////////////
            /////////////////////////////////////////////////////////////////////////////////////
            // if the device has the Wifi credentials already stored, this call it's faster    //
            // success = WifiNetworkHelper.Reconnect(requiresDateTime: true, token: cs.Token); //
            /////////////////////////////////////////////////////////////////////////////////////
            /////////////////////////////////////////////////////////////////////////////////////

#else
            success = NetworkHelper.SetupAndConnectNetwork(cs.Token, true);
#endif

            if (!success)
            {
                Debug.WriteLine($"Can't get a proper IP address and DateTime, error: {NetworkHelper.Status}.");
                if (NetworkHelper.HelperException != null)
                {
                    Debug.WriteLine($"Exception: {NetworkHelper.HelperException}");
                }
                return;
            }

            // setup HTTP response
            string responseString = "<HTML><BODY>Hello world! This is nanoFramework.</BODY></HTML>";
            byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);

            // Create a listener.
            string prefix = "https";
            int port = prefix == "http" ? 80 : 443;

            Debug.WriteLine("* Creating Http Listener: " + prefix + " on port " + port);
            HttpListener listener = new HttpListener(prefix, port);

            // assign server certificate
            listener.HttpsCert = _myWebServerCertificate509;

            listener.SslProtocols = System.Net.Security.SslProtocols.Tls | System.Net.Security.SslProtocols.Tls11 | System.Net.Security.SslProtocols.Tls12;

            Debug.WriteLine($"Listening for HTTP requests @ {NetworkInterface.GetAllNetworkInterfaces()[0].IPv4Address}:{port} ...");
            listener.Start();

            while (true)
            {
                try
                {
                    // now wait on context for a connection
                    HttpListenerContext context = listener.GetContext();

                    // Get the response stream and write the response content to it
                    context.Response.ContentLength64 = buffer.Length;
                    context.Response.OutputStream.Write(buffer, 0, buffer.Length);

                    // output stream must be closed
                    context.Response.Close();
                    
                    // context must be closed
                    context.Close();
                }
                catch (Exception ex)
                {
                    Debug.WriteLine("* Error getting context: " + ex.Message + "\r\nSack = " + ex.StackTrace);
                }
            }
        }


        // X509 RSA key PEM format 2048 bytes
        // generate with openssl:
        // > openssl req -newkey rsa:2048 -nodes -keyout selfcert.key -x509 -days 365 -out selfcert.crt
        // and paste selfcert.crt content below:
        private const string _myWebServerCrt =
@"-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----";

        // this one is generated with the command below. We need a password.
        // > openssl rsa -des3 -in selfcert.key -out selfcertenc.key
        // the one below was encoded with '1234' as the password.
        private const string _myWebServerPrivateKey =
@"-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----";

    }
}