Simple Counter API - Tornado Typing CST Test

Simple Counter API — Tornado Code

Demonstrates a simple Tornado REST API with a counter using async handlers and in-memory state.

import tornado.ioloop
import tornado.web

count = 0

class CounterHandler(tornado.web.RequestHandler):
	async def get(self):
		self.write({'count': count})

class IncrementHandler(tornado.web.RequestHandler):
	async def post(self):
		global count
		count += 1
		self.write({'count': count})

class DecrementHandler(tornado.web.RequestHandler):
	async def post(self):
		global count
		count -= 1
		self.write({'count': count})

class ResetHandler(tornado.web.RequestHandler):
	async def post(self):
		global count
		count = 0
		self.write({'count': count})

app = tornado.web.Application([
	(r'/counter', CounterHandler),
	(r'/counter/increment', IncrementHandler),
	(r'/counter/decrement', DecrementHandler),
	(r'/counter/reset', ResetHandler)
])

if __name__ == '__main__':
	app.listen(8888)
	tornado.ioloop.IOLoop.current().start()

Tornado Language Guide

Tornado is a Python web framework and asynchronous networking library, designed for handling thousands of simultaneous connections. It excels at real-time web services and long-lived network connections.

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