Purpose

This section presents a bash script that will serve as a generic message program to talk to our bot. The aim is to be able to do something as easy as

$ echo "toto" | tg_logbot.sh

To send a message to our chatbot without the need to use complexe curl in each of our programs that will communicate with our chatbot.

The tg_logbot.sh script

$ vim tg_logbot.sh

#!/bin/bash
CHATID="0123456789"
KEY="`YOUR_BOT_TOKEN`"
TIME="10"
URL="https://api.telegram.org/bot$KEY/sendMessage"
while IFS= read -r line; do
        line=`echo "$line" | sed -e 's/\"//g'`
        line=`echo "$line" | sed -e 's/\[//g'`
        echo "$line"
        line=`echo "$line" | sed -e 's/\]//g'`
        echo "$line"
        line=`echo "$line" | sed -e 's/_/\\\_/g'`
        echo "$line"
        line=`echo "$line" | sed -e 's/\*//g'`
        echo send new line as msg: "$line"
        curl -s --max-time $TIME -d "chat_id=$CHATID&disable_web_page_preview=1&parse_mode=markdown" --data-urlencode "text=$line" $URL >/dev/null
done

You will have to replace the CHATID and KEY values with your own ones.

Once saved, make the script executable :

$ chmod +x tg_logbot.sh

And once again, that is ALL !!
You can now try to pipe, tail, cat whatever your want to the shell script which will handle its transfer to our chatbot !!