(r"/api/loadtest1", "handlers.test.LoadTestHandlerSync"),
    (r"/api/loadtest2", "handlers.test.LoadTestHandlerAsync"),
    (r"/api/loadtest3", "handlers.test.LoadTestHandlerCo")

# 同步代码
class LoadTestHandlerSync(BaseHandler):

    def get(self):
        delay = float(self.get_argument('delay', 0.01))
        print delay
        time.sleep(delay)

        http_client = tornado.httpclient.HTTPClient()
        response = http_client.fetch("http://www.baidu.com")

        self.write(response.body)

          
# 异步, 使用asynchronous decorator
class LoadTestHandlerAsync(BaseHandler):

    @tornado.web.asynchronous
    def get(self):
        delay = float(self.get_argument('delay', 0.01))
        print delay

        http_client = tornado.httpclient.AsyncHTTPClient()
        http_client.fetch("http://www.baidu.com", callback=self.on_response)

    def on_response(self, response):
        self.write(response.body)
        self.finish()

          
# 异步, 使用coroutine decorator
class LoadTestHandlerCo(BaseHandler):

    @gen.coroutine
    def get(self):
        delay = float(self.get_argument('delay', 0.01))
        print delay

        http_client = tornado.httpclient.AsyncHTTPClient()
        data = yield http_client.fetch("http://www.baidu.com")
        self.write(data.body)