前言

最近做物联网项目的时候需要搭建一个异步非阻塞的HTTP服务器，经过查找资料，发现可以使用gevent包。

代码清单

下面放上代码清单，以后需要用到的时候直接移植即可。

# coding=utf-8

# Python Version: 3.5.1

# Flask

from flask import Flask, request, g

# gevent

from gevent import monkey

from gevent.pywsgi import WSGIServer

monkey.patch_all()

# gevent end

import time

app = Flask(__name__)

app.config.update(DEBUG=True)

@app.route('/asyn/', methods=['GET'])

def test_asyn_one():

print("asyn has a request!")

time.sleep(10)

return 'hello asyn'

@app.route('/test/', methods=['GET'])

def test():

return 'hello test'

if __name__ == "__main__":

# app.run()

http_server = WSGIServer(('', 5000), app)

http_server.serve_forever()

测试

打开浏览器，首先请求http://127.0.0.1:5000/asyn/，然后

再请求http://127.0.0.1:5000/test/这个接口十次。如果是一般的Flask框架，后面的接口是没有响应的。

打印内容如下：

asyn has a request!

127.0.0.1 - - [2016-10-24 20:45:10] “GET /test/ HTTP/1.1” 200 126 0.000000

127.0.0.1 - - [2016-10-24 20:45:11] “GET /test/ HTTP/1.1” 200 126 0.000000

127.0.0.1 - - [2016-10-24 20:45:11] “GET /test/ HTTP/1.1” 200 126 0.000000

127.0.0.1 - - [2016-10-24 20:45:12] “GET /test/ HTTP/1.1” 200 126 0.000000

127.0.0.1 - - [2016-10-24 20:45:12] “GET /test/ HTTP/1.1” 200 126 0.000998

127.0.0.1 - - [2016-10-24 20:45:13] “GET /test/ HTTP/1.1” 200 126 0.001001

127.0.0.1 - - [2016-10-24 20:45:14] “GET /test/ HTTP/1.1” 200 126 0.000000

127.0.0.1 - - [2016-10-24 20:45:14] “GET /test/ HTTP/1.1” 200 126 0.001014

127.0.0.1 - - [2016-10-24 20:45:15] “GET /test/ HTTP/1.1” 200 126 0.001000

127.0.0.1 - - [2016-10-24 20:45:15] “GET /test/ HTTP/1.1” 200 126 0.000000

127.0.0.1 - - [2016-10-24 20:45:18] “GET /asyn/ HTTP/1.1” 200 126 10.000392

参考资料