Python的一个新web框架Tornado的初步了解
jopen
10年前
Python的一个新web框架，由非死book开源。不得不说，品牌效应啊，只要是非死book开源的项目，没有不好用的。Tornado可以说是好用到了极致，从打开官方页面开始了解，到搭建一个web服务器，只用了10分钟。
另外，Tornado支持websocket通讯，和前几天看的通过Netty支持Websocket相比，Tornado的操作要显得简单得更多。
下载地址：http://www.tornadoweb.org/en/stable/
安装步骤：
tar xvzf tornado-3.0.1.tar.gz cd tornado-3.0.1 python setup.py build sudo python setup.py install
服务器代码如下：
import tornado.ioloop import tornado.web import tornado.websocket class MainHandler(tornado.web.RequestHandler): def get(self): self.write("Hello, world") class MainHandler2(tornado.web.RequestHandler): def get(self): self.write("This is a test") class EchoWebSocket(tornado.websocket.WebSocketHandler): def open(self): print "WebSocket opened" def on_message(self, message): self.write_message(u"You said: " + message) def on_close(self): print "WebSocket closed" application = tornado.web.Application([ (r"/", MainHandler), (r"/test", MainHandler2), (r"/websocket", EchoWebSocket), ]) if __name__ == "__main__": application.listen(8888) tornado.ioloop.IOLoop.instance().start()只需要在application中注册url对应的handler即可，对于websocket，只要让handler继承自tornado.websocket.WebSocketHandler。
然后用以下代码测试：
<html><head><title>Web Socket Client</title></head> <body> <script type="text/javascript"> var socket; if (!window.WebSocket) { window.WebSocket = window.MozWebSocket; } // Javascript Websocket Client if (window.WebSocket) { socket = new WebSocket("ws://localhost:8888/websocket"); socket.onmessage = function(event) { var ta = document.getElementById('responseText'); ta.value = ta.value + '\n' + event.data }; socket.onopen = function(event) { var ta = document.getElementById('responseText'); ta.value = "Web Socket opened!"; }; socket.onclose = function(event) { var ta = document.getElementById('responseText'); ta.value = ta.value + "Web Socket closed"; }; } else { alert("Your browser does not support Web Socket."); } // Send Websocket data function send(message) { if (!window.WebSocket) { return; } if (socket.readyState == WebSocket.OPEN) { socket.send(message); } else { alert("The socket is not open."); } } </script> <h3>Send :</h3> <form onsubmit="return false;"> <input type="text" name="message" value="Hello World!"/><input type="button" value="Send Web Socket Data" onclick="send(this.form.message.value)" /> <h3>Receive :</h3> <textarea id="responseText" style="width:500px;height:300px;"></textarea> </form> </body> </html> 效果如下：
