Combined Routes Example - Tornado Typing CST Test

Combined Routes Example — Tornado Code

Logging, JSON echo, and counter in a single Tornado app.

import tornado.ioloop
import tornado.web
import json

count = 0

class LogHandler(tornado.web.RequestHandler):
	async def prepare(self):
		print(f'{self.request.method} {self.request.uri}')

class EchoHandler(LogHandler):
	async def post(self):
		data = json.loads(self.request.body)
		self.write(data)

class CounterHandler(LogHandler):
	async def get(self):
		self.write({'count': count})
	async def post(self, action):
		global count
		if action == 'increment': count += 1
		elif action == 'decrement': count -= 1
		elif action == 'reset': count = 0
		self.write({'count': count})

app = tornado.web.Application([
	(r'/echo', EchoHandler),
	(r'/counter', CounterHandler),
	(r'/counter/(increment|decrement|reset)', CounterHandler)
])

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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