Microchat

client.cs

using System;
using System.Net;
using Newtonsoft.Json;
using System.Security.Cryptography.X509Certificates;

namespace Chat
{
    class Program
    {
        private static bool RemoteCertificateValidate(object sender, X509Certificate cert, X509Chain chain, System.Net.Security.SslPolicyErrors error)
        {
            if ((sender is HttpWebRequest) && ((HttpWebRequest)sender).Host == "c3.localdomain:6984")
                if (error != System.Net.Security.SslPolicyErrors.None || !cert.Subject.Contains("O=Oleksandr Nikitin") || !cert.Subject.Contains("c3.localdomain")) return false;
            return true;
        }
        static void Main(string[] args)
        {
            ServicePointManager.ServerCertificateValidationCallback += RemoteCertificateValidate;
            string chan = Console.ReadLine();
            int u = JsonConvert.DeserializeObject<HistoryInfo>((new WebClient().DownloadString("https://c3.localdomain:6984/chat/"))).update_seq;
            (new System.Threading.Thread(() => {
                while (u++ != 0)
                {
                    var changes = (new WebClient()).DownloadString("https://c3.localdomain:6984/chat/_changes?feed=longpoll&filter=router/do&Channel=" + chan + "&include_docs=true&since=" + u);
                    foreach (var x in JsonConvert.DeserializeObject<ResultsList>(changes).results) Console.WriteLine(x.doc.DataString);
                }
            })).Start();
            while (true)
            {
                var em = new ChatMessage() { DataString = Console.ReadLine(), To = chan };
                var wc = new WebClient();
                wc.Headers["Content-Type"] = "application/json";
                wc.UploadString("https://c3.localdomain:6984/chat", JsonConvert.SerializeObject(em));
            }
        }
    }

    public class HistoryInfo { public int update_seq; }

    public class Result { public ChatMessage doc; }

    public class ResultsList
    {
        public System.Collections.Generic.List<Result> results;
        public int last_seq;
    }

    public class ChatMessage
    {
        public string To;
        public string DataString;
    }
}

server.js

// server installation:
// 1. install CouchDB http://couchdb.apache.org/#download
// 2. curl -v -H "Content-Type: application/json" -X PUT --data "server.json" https://c3.localdomain:6984/chat

{
   "_id": "_design/router",
   "filters": {
       "do": "function(doc, req) { if(req.query.Channel.split(',').indexOf(doc.To)!=-1) { return true; }    else { return false; }}"
   }
}