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Telegram HTML Message Sender Script

This script sends HTML-formatted messages to Telegram users or chats, leveraging the Telegram Bot API. It calculates values dynamically using commands from a runner (e.g., a Linux server), and customizes messages by substituting template variables with actual values.

Demo Setup

To test the script's functionality:

  1. Edit the bot-ping.conf file to set BOT_TOKEN and NOTIFY_TG_IDS with your own bot token and Telegram user/chat IDs.
  2. Run the script with the --send-html parameter: 
    ./send_message.sh --send-html <path-to-template.html>

Expected Demo Output

All user/chat IDs listed in NOTIFY_TG_IDS in the configuration file will receive a message with:

  • Server uptime
  • CPU/memory load
  • Requested user ID

Customizing Messages

Step 1: Edit Template HTML

To use your own variables and messages:

  1. Modify the template.html file to include any allowed HTML tags (see the Telegram Bot SDK reference).
  2. Add custom variables using {{key}} syntax (e.g., {{my_custom_value}}) within template.html.

Step 2: Configure Dynamic Variables

  1. Add corresponding commands in dynamic_variables.sh for each {{key}} you defined in the HTML template.
  2. The keys in dynamic_variables.sh and {{key}} in template.html must match exactly.
  3. Example if you've passed {{my_custom_value}} to html template: 
    html_vars["my_custom_value"]="some_command_to_get_value"