tornado异步客户端(Future)

先把可运行代码列出来, 注释和说明后续补充.

# -.- coding:utf-8 -.-
# __author__ = 'zt'

import tornado.ioloop
from tornado.concurrent import Future
from tornado.httpclient import AsyncHTTPClient


def async_fetch_future(url):
    http_client = AsyncHTTPClient()
    my_future = Future()
    fetch_future = http_client.fetch(url)
    fetch_future.add_done_callback(lambda f: my_future.set_result(f.result()))
    return my_future


def main():
    return async_fetch_future('http://www.qq.com').running()


if __name__ == '__main__':
    response = tornado.ioloop.IOLoop.instance().run_sync(main)
    print response.body

# -.- coding:utf-8 -.-
# __author__ = 'zt'

import json
import tornado.ioloop
from tornado.httpclient import AsyncHTTPClient
from tornado.concurrent import Future


def futrue_callback(res_future):
    print("调用回调函数 Futrue")
    s = res_future.result().body.decode('gbk')
    print(s)


def async_fetch_future(url):
    """
    异步请求，使用Future类
    :param url:
    :return:
    """
    http_client = AsyncHTTPClient()
    my_future = Future()
    fetch_future = http_client.fetch(url)
    fetch_future.add_done_callback(
        # Future的result默认为HttpResponce
        lambda f: my_future.set_result(f.result()))
    return my_future

if __name__ == '__main__':
    # 异步请求，返回Futrue类
    s = async_fetch_future("http://www.qq.com")
    io_loop = tornado.ioloop.IOLoop.current()
    io_loop.add_future(s, callback=futrue_callback)
    io_loop.start()

参考： <http://www.tornadoweb.org/en/stable/guide/async.html#examples>

参考： <http://www.cnphp6.com/archives/85012>