puragram

Fast, dependency-light Telegram Bot API framework built on urllib3. No aiohttp. No requests. No httpx.

Why puragram?

Most Telegram Python libraries pull in aiohttp or requests. puragram talks directly to the Telegram Bot API through urllib3 with a keep-alive connection pool. That means:

• Small — no heavy dependencies, just urllib3
• Fast — direct JSON requests, no middleware layers
• Sync — simple, predictable, easy to debug

Features

• Long-polling and webhook (pure stdlib http.server)
• Inline mode — @yourbot query with results
• Built-in FSM: State, StatesGroup, MemoryStorage, FileStorage, SQLiteStorage
• Middleware: logging, throttling, timing
• Filters: Command, Text, Regexp, ContentTypes, ChatType, ChatId, UserId, CallbackData, CallbackDataPrefix, Func
• Filter operators: & (and), | (or), ~ (not)
• File sending: photo, document, video, audio, voice, sticker
• Extras: poll, location, contact, dice
• Auto-split for long messages (send_long_message)
• Security: path traversal guard, size limits, ReDoS protection, token redaction, dedup, safe SQLite
• Zero dependencies except urllib3

Install

pip install puragram

Requires Python 3.9+.

Quick start

from puragram import Bot

bot = Bot("YOUR_TOKEN", parse_mode="HTML")

@bot.message_handler(commands=["start"])
def start(msg):
    bot.send_message(msg.chat.id, f"Hi, <b>{msg.from_user.first_name}</b>!")

@bot.message_handler(content_types=["text"])
def echo(msg):
    bot.send_message(msg.chat.id, f"You said: <b>{msg.text}</b>")

if __name__ == "__main__":
    bot.run_polling()

FSM example

from puragram import Bot, RemoveKeyboard, State, StatesGroup

bot = Bot("YOUR_TOKEN", parse_mode="HTML")

class Form(StatesGroup):
    name = State()
    age = State()

@bot.message_handler(commands=["start"])
def start(msg, data):
    data["state"].set_state(Form.name)
    bot.send_message(msg.chat.id, "What's your name?")

@bot.message_handler(state=Form.name)
def on_name(msg, data):
    data["state"].update_data(name=msg.text)
    data["state"].set_state(Form.age)
    bot.send_message(msg.chat.id, f"Nice to meet you, {msg.text}. How old are you?")

@bot.message_handler(state=Form.age)
def on_age(msg, data):
    ctx = data["state"]
    if not msg.text.isdigit():
        bot.send_message(msg.chat.id, "Please enter a number.")
        return
    ctx.update_data(age=int(msg.text))
    info = ctx.get_data()
    ctx.clear()
    bot.send_message(
        msg.chat.id,
        f"Done!\nName: {info['name']}\nAge: {info['age']}",
        reply_markup=RemoveKeyboard(),
    )

bot.run_polling()

Inline mode example

from puragram import Bot, InlineQueryResultArticle

bot = Bot("YOUR_TOKEN")

@bot.inline_query_handler()
def on_inline(q):
    results = [
        InlineQueryResultArticle(
            id="1",
            title="Send hello",
            input_message_content={"message_text": "Hello!"},
        ),
    ]
    bot.answer_inline_query(q.id, results)

bot.run_polling()

Middleware

from puragram import Bot, LoggingMiddleware, ThrottlingMiddleware

bot = Bot("YOUR_TOKEN")
bot.middleware(LoggingMiddleware())
bot.middleware(ThrottlingMiddleware(rate=0.5))

@bot.message_handler(content_types=["text"])
def echo(msg):
    bot.send_message(msg.chat.id, msg.text)

bot.run_polling(workers=4)

Webhook

from puragram import Bot, WebhookServer

bot = Bot("YOUR_TOKEN")

@bot.message_handler(commands=["start"])
def start(msg):
    bot.send_message(msg.chat.id, "Hello via webhook!")

if __name__ == "__main__":
    server = WebhookServer(
        bot,
        host="0.0.0.0",
        port=8080,
        path="/webhook",
        secret_token="change-me-to-random-32-chars",
    )
    server.install("https://your-domain.com/webhook")
    server.start(blocking=True)

Security

• Path traversal — safe_path() rejects /etc, /proc, /sys, /root, /dev
• Upload size — 50 MB limit enforced
• Callback data — validated to ≤64 UTF-8 bytes
• ReDoS — compile_safe_regex() rejects nested quantifiers
• Webhook forgery — hmac.compare_digest on secret token
• Token leakage — bot tokens redacted from logs
• Idempotency — duplicate update_id dropped via LRU
• SQL injection — parameterized queries only

Documentation

See ABOUT.md for a full beginner's guide: Python essentials, HTTP, JSON, Telegram Bot API, FSM, middleware, webhooks, security, testing, and deployment.

License

MIT — see LICENSE.