Application of WebSocket in flask and tornado

A. Installation

    pip3 install gevent-websocket         作用：        - 处理Http、Websocket协议的请求 -> socket         - 封装Http、Websocket相关数据   -> request

B. Basic structure

    from geventwebsocket.handler import WebSocketHandler    from gevent.pywsgi import WSGIServer            @app.route('/test')    def test():        ws = request.environ.get('wsgi.websocket')        ws.receive()        ws.send(message)        ws.close()        return render_template('index.html')                        if __name__ == '__main__':        http_server = WSGIServer(('0.0.0.0', 5000,), app, handler_class=WebSocketHandler)        http_server.serve_forever()

C. Web chat Room:

    Backend: From Geventwebsocket.handler import websockethandler from Gevent.pywsgi import Wsgiserver fro M flask import flask,render_template,request import Pickle app = Flask (__name__) App.secret_key = ' XF         Sdfqw ' @app. Route ('/index ') def index (): Return render_template (' index.html ') ws_list = []                 @app. Route ('/test ') def Test (): WS = Request.environ.get (' wsgi.websocket ') if not WS:                Return ' Please use WebSocket protocol ' # WebSocket connection has succeeded Ws_list.append (WS) while True:  # waits for the user to send a message, and accepts MSG = Ws.receive () # Close: Message=none if not                    Message:WS_LIST.remove (WS) break for item in Ws_list: Item.Send (message) return "..." if __name__ = = ' __main__ ': http_server = Wsgiserver (' 0 .0.0.0 ',,,), app, haNdler_class=websockethandler) Http_server.serve_forever () Front End: <! DOCTYPE html> 

D. tornado.websocket Example

            Import tornado from Tornado.web import application from Tornado.web import RequestHandle                R from tornado.websocket import Websockethandler class Indexhandler (RequestHandler): def get (self, *args, **kwargs): # self.write (' Hello World ') self.render (' index.html ') ) def post (self, *args, **kwargs): User = self.get_argument (' user ') s Elf.write (' success ') ws_list = [] class MessageHandler (Websockethandler): Def open (self, *                    args, **kwargs): Ws_list.append (self) def on_message (self, message):                    For WS in WS_LIST:ws.write_message (message) def on_close (self): Ws_list.remove (self) settings = {' Template_path ': ' Templates ', ' Static_path ': ' STA      Tic ',}      App = Application ([r "/index", Indexhandler), (R "/message", MessageHandler),                ],**settings) If __name__ = = ' __main__ ': App.listen (address= ' 0.0.0.0 ', port=9999) Tornado.ioloop.IOLoop.instance (). Start ()

WebSocket applications in flasks and tornadoes