Tornado-第二篇-异步非阻塞

　　manage.py

from tornado.ioloop import IOLoop
from tornado.web import RequestHandler
from tornado.web import Application
from tornado import gen
from tornado import httpclient


class HomeHandler(RequestHandler):
    def get(self, *args, **kwargs):
        name = self.get_query_argument('name')
        print('用户%s的请求来了', name)
        import time
        time.sleep(20)
        self.write('这是结果')


class AsyncHandler(RequestHandler):
    # 1.加gen.coroution装饰器
    @gen.coroutine
    def get(self, *args, **kwargs):
        name = self.get_query_argument('name')
        print('用户%s的去请求来了' % name)
        http = httpclient.AsyncHTTPClient()
        # 2.返回一个Future对象
        yield http.fetch('http://www.google.com', self.done)

    def done(self, response):
        print(response)
        self.write('ok')
        self.finish()


application = Application([
    ('/home', HomeHandler),
    ('/async', AsyncHandler),
])
if __name__ == '__main__':
    application.listen(8888)
    IOLoop.instance().start()