Telegram Alert bot stops with "WebException"

Hi guys

I have this Telegram alert bot but everytime I start it, it crashes Onstart with "WebException" please help.

I have both the Channel ID and Key but nothing seems to work.

PS I am not a coder, so please if you could make the solutions relatively simple, I would greatly appreciate it. Many thanks

I have also changed the OnStart solution provide to the one below but still Crashes.

///////////

protected override void OnStart()
        {
            ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

            // If you didn't set a channel, then find channels by looking at the updates
            if (string.IsNullOrEmpty(ChannelId))
            {
                _telegramChannels = ParseChannels(GetBotUpdates());
            }
            else
            {
                _telegramChannels.Add(ChannelId);
            }
            SendMessageToAllChannels("Hellow world.. ");

        }

///////////

using System;
using System.Linq;
using System.Net;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;

namespace cAlgo
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.FullAccess)]
    public class TelegramBotExample : Robot
    {
        [Parameter("Telegram Bot Key", DefaultValue = "__bot_key__")]
        public string BOT_API_KEY { get; set; }

        // if you know which channel you want to broadcast to, add it here
        // otherwise the bot looks at the people and channels its' interacted with and
        // sends messages to everyone
        [Parameter("ChannelId", DefaultValue = "")]
        public string ChannelId { get; set; }


        List<string> _telegramChannels = new List<string>();

        protected override void OnStart()
        {
            // If you didn't set a channel, then find channels by looking at the updates
            if (string.IsNullOrEmpty(ChannelId))
            {
                _telegramChannels = ParseChannels(GetBotUpdates());
            }
            else
            {
                _telegramChannels.Add(ChannelId);
            }
            SendMessageToAllChannels("Hellow world.. ");

        }

        protected override void OnTick()
        {
            // Put your core logic here

        }

        protected override void OnBar()
        {
            // Put your core logic here
            int idx = this.MarketSeries.Close.Count - 2;
            if (this.MarketSeries.Close[idx] > this.MarketSeries.Open[idx])
            {
                SendMessageToAllChannels("Up Candle " + this.MarketSeries.Close[idx] + " " + this.MarketSeries.Open[idx]);
            }
            else
            {
                SendMessageToAllChannels("Down Candle " + this.MarketSeries.Close[idx] + " " + this.MarketSeries.Open[idx]);
            }
        }

        protected override void OnStop()
        {
            // Put your deinitialization logic here
        }


        //  Parses messages for bot and determines which channesl are listening
        private List<string> ParseChannels(string jsonData)
        {
            var matches = new Regex("\"id\"\\:(\\d+)").Matches(jsonData);
            List<string> channels = new List<string>();
            if (matches.Count > 0)
            {
                foreach (Match m in matches)
                {
                    if (!channels.Contains(m.Groups[1].Value))
                    {
                        channels.Add(m.Groups[1].Value);
                    }
                }
            }
            foreach (var v in channels)
            {
                Print("DEBUG: Found Channel {0} ", v);
            }
            return channels;
        }

        protected int updateOffset = -1;
        private string GetBotUpdates()
        {
            Dictionary<string, string> values = new Dictionary<string, string>();
            if (updateOffset > -1)
            {
                values.Add("offset", (updateOffset++).ToString());
            }

            var jsonData = MakeTelegramRequest(BOT_API_KEY, "getUpdates", values);

            var matches = new Regex("\"message_id\"\\:(\\d+)").Matches(jsonData);
            if (matches.Count > 0)
            {
                foreach (Match m in matches)
                {
                    int msg_id = -1;
                    int.TryParse(m.Groups[1].Value, out msg_id);
                    if (msg_id > updateOffset)
                    {
                        updateOffset = msg_id;
                    }
                }
            }
            return jsonData;
        }

        private void SendMessageToAllChannels(string message)
        {
            foreach (var c in _telegramChannels)
            {
                SendMessageToChannel(c, message);
            }
        }

        private string SendMessageToChannel(string chat_id, string message)
        {
            var values = new Dictionary<string, string> 
            {
                {
                    "chat_id",
                    chat_id
                },
                {
                    "text",
                    message
                }
            };

            return MakeTelegramRequest(BOT_API_KEY, "sendMessage", values);
        }

        private string MakeTelegramRequest(string api_key, string method, Dictionary<string, string> values)
        {
            string TELEGRAM_CALL_URI = string.Format("https://api.telegram.org/bot{0}/{1}", api_key, method);

            var request = WebRequest.Create(TELEGRAM_CALL_URI);
            request.ContentType = "application/x-www-form-urlencoded";
            request.Method = "POST";

            StringBuilder data = new StringBuilder();
            foreach (var d in values)
            {
                data.Append(string.Format("{0}={1}&", d.Key, d.Value));
            }
            byte[] byteArray = Encoding.UTF8.GetBytes(data.ToString());
            request.ContentLength = byteArray.Length;

            Stream dataStream = request.GetRequestStream();

            dataStream.Write(byteArray, 0, byteArray.Length);

            dataStream.Close();

            WebResponse response = request.GetResponse();

            Print("DEBUG {0}", ((HttpWebResponse)response).StatusDescription);

            dataStream = response.GetResponseStream();

            StreamReader reader = new StreamReader(dataStream);

            string outStr = reader.ReadToEnd();

            Print("DEBUG {0}", outStr);

            reader.Close();

            return outStr;


        }
    }
}

RE:

Did you try to send a message to bot over telegram? Like sending a message to a person?

RE: RE:

ergun said:

Did you try to send a message to bot over telegram? Like sending a message to a person?

Hi ergun

Yes I did but it's not working at all.

Do you have any suggestions?

Any help would be much appreciated thanks.

Regards

Hi Guys

Does anyone have any insight or solution to this?

Many thanks for all your help.

Regards

Gwave