Syntax Highlighter Bot

A Telegram bot for generating screenshots with highlighted code.

How it works

There are two services - bot.py and screenshot-service.js.

• bot.py - bot written in AIOgram
• screenshot-service.js - a service for generating screenshots

1. Bot requests the screenshot service to generate an image with code.
2. Screenshot service in turn does:
   1. Highlights a code via highlight.js
   2. Load generated HTML and takes a screenshot via Puppeteer (headless Chrome driver)
   3. Saves generated screenshot to a directory and returns it's path.
3. Bot sends generated image to a user.

Quick start

1. Install dependencies:

# Python dependencies
$ poetry install
# JavaScript dependencies
$ npm i

2. Copy .env.example to .env:

$ cp .env.example .env

3. Specify a bot token in .env.
4. Execute services:

# execute bot
$ poetry run bot.py
# execute bot (in another terminal)
$ node screenshot-service.js

If you are running a bot locally don't forget to start Telegram Bot API.

Development

For local development use Telegram Bot API.

Roadmap

• Rate limiting
• Use queue to limit the number of pages generated in parallel
• Containerize