如何使用Python Tornado构建一个线程安全的Request Handler

import tornado.web
import tornado.httpclient
import tornado.ioloop

class ThreadSafeRequestHandler(tornado.web.RequestHandler):
    def initialize(self):
        self.clients = {}

    def get(self):
        client = tornado.httpclient.AsyncHTTPClient()
        url = self.request.uri
        response = client.fetch(url, method=self.request.method, body=self.request.body, headers=self.request.headers)
        self.set_status(response.code, response.reason)
        for header in response.headers.get_all():
            if header not in ('Content-Length', 'Transfer-Encoding', 'Content-Encoding', 'Connection'):
                self.add_header(*header)
        self.write(response.body)
        self.finish()

    def head(self):
        self.get()

    def post(self):
        self.get()

    def put(self):
        self.get()

    def delete(self):
        self.get()

    def connect(self):
        self.get()

    def options(self):
        self.get()

    def patch(self):
        self.get()

    def trace(self):
        self.get()