websocket
Posted q767498226
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1. 单聊的实现
import json from flask import Flask, render_template, request from gevent.pywsgi import WSGIServer from geventwebsocket.handler import WebSocketHandler app = Flask(__name__) @app.route("/") def index(): return render_template("sifa.html") user_dict = @app.route("/chat/<name>") def chat(name): user_socket = request.environ.get("wsgi.websocket") user_dict[name] = user_socket # 把登陆到聊天室的用户放到一个字典中,name:obj while 1: try: msg = user_socket.receive() msg_dict = json.loads(msg) # 把接收到的json反序列化 for user in user_dict: if user == msg_dict.get("to_user"): # 找到要收信的用户,发过去 user_dict[user].send(msg_dict.get("message")) except: user_dict.pop(name) return "good bye!" if __name__ == ‘__main__‘: websocket = WSGIServer(("0.0.0.0", 8001), application=app, handler_class=WebSocketHandler) websocket.serve_forever()
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Title</title> </head> <body> <p>名字: <input type="text" id="name"></p> <button onclick="open_chat()">join</button> <p>to:<input type="text" id="to_user"></p> <p>信息:<input type="text" id="send_message"></p> <button onclick="send_message()">send</button> <div id="chat"></div> <script type="application/javascript"> var ws = null; var name = null; function open_chat() name = document.getElementById("name").value; ws = new WebSocket("ws://127.0.0.1:8001/chat/" + name); ws.onopen = function() alert("欢迎"+name+"来到对骂平台!!!") ; // 要写在创建websocket对象后面 ws.onmessage = function (event_message) var p = document.createElement("p"); p.innerText = event_message.data; console.log(event_message); document.getElementById("chat").appendChild(p); ; ws.onclose = function() console.log("掉线了,兄嘚!!!"); ; function send_message() var send_message = document.getElementById("send_message").value; var to_user = document.getElementById("to_user").value; // 给服务器发的时候带着谁发的,发给谁,消息是什么 var msg = from_user:name, to_user:to_user, message:send_message ; // 这是js中的object对象,要json序列化 ws.send(JSON.stringify(msg)) </script> </body> </html>
2. 群聊的实现
from geventwebsocket.websocket import WebSocket from geventwebsocket.handler import WebSocketHandler from gevent.pywsgi import WSGIServer from geventwebsocket.exceptions import WebSocketError from flask import Flask, render_template, request app = Flask(__name__) @app.route("/") def ws(): return render_template("ws.html") user_list = [] @app.route("/my_ws") def my_ws(): user_socket = request.environ.get("wsgi.websocket") # 拿到连接上的用户对象 user_list.append(user_socket) # 把所有连接上的用户对象都放在一个列表中 while 1: try: msg = user_socket.receive() except WebSocketError: user_list.remove(user_socket) return "good bye!" for user in user_list: # 遍历列表,把消息发给每一个人 user.send(msg) """ request.environ 的数据 ‘GATEWAY_INTERFACE‘: ‘CGI/1.1‘, ‘SERVER_SOFTWARE‘: ‘gevent/1.4 Python/3.6‘, ‘SCRIPT_NAME‘: ‘‘, ‘wsgi.version‘: (1, 0), ‘wsgi.multithread‘: False, ‘wsgi.multiprocess‘: False, ‘wsgi.run_once‘: False, ‘wsgi.url_scheme‘: ‘http‘, ‘wsgi.errors‘: <_io.TextIOWrapper name=‘<stderr>‘ mode=‘w‘ encoding=‘UTF-8‘>, ‘SERVER_NAME‘: ‘LAPTOP-DNKA8ER5‘, ‘SERVER_PORT‘: ‘8001‘, ‘REQUEST_METHOD‘: ‘GET‘, ‘PATH_INFO‘: ‘/my_ws‘, ‘QUERY_STRING‘: ‘‘, ‘SERVER_PROTOCOL‘: ‘HTTP/1.1‘, ‘REMOTE_ADDR‘: ‘127.0.0.1‘, ‘REMOTE_PORT‘: ‘50061‘, ‘HTTP_HOST‘: ‘127.0.0.1:8001‘, ‘HTTP_CONNECTION‘: ‘Upgrade‘, ‘HTTP_PRAGMA‘: ‘no-cache‘, ‘HTTP_CACHE_CONTROL‘: ‘no-cache‘, ‘HTTP_UPGRADE‘: ‘websocket‘, ‘HTTP_ORIGIN‘: ‘http://127.0.0.1:8001‘, ‘HTTP_SEC_WEBSOCKET_VERSION‘: ‘13‘, ‘HTTP_USER_AGENT‘: ‘Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36‘, ‘HTTP_ACCEPT_ENCODING‘: ‘gzip,deflate, br‘, ‘HTTP_ACCEPT_LANGUAGE‘: ‘zh-CN,zh;q=0.9,en;q=0.8‘, ‘HTTP_COOKIE‘: ‘csrftoken=a0jQx6LNfJty8IzXP5x9Z5QQaVkPncQ7OllFs3I7ZVhwXyAE5MHdVx9wNJu4dqdb; sessionid=vx6eyq4xqew1zkew0r8d0y48t9ngiz0d; session=54b644d8-fb51-4ecf-8761-f61a2fcaa077‘, ‘HTTP_SEC_WEBSOCKET_KEY‘: ‘+bmrJihBAc6bMY5GaBfAWA==‘, ‘HTTP_SEC_WEBSOCKET_EXTENSIONS‘: ‘permessage-deflate; client_max_window_bits‘, ‘wsgi.input‘: <gevent.pywsgi.Input object at 0x000002C52023FB28>, ‘wsgi.input_terminated‘: True, ‘wsgi.websocket‘: <geventwebsocket.websocket.WebSocket object at 0x000001B392B91DB0>, ‘werkzeug.request‘: <Request ‘http://127.0.0.1:8001/my_ws‘ [GET]> """ if __name__ == ‘__main__‘: # 实例化一个这个对象 websocket = WSGIServer(("0.0.0.0", 8001), application=app, handler_class=WebSocketHandler) # 永久的开启这个对象 websocket.serve_forever()
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Title</title> </head> <body> <input type="text" id="send_msg"> <button onclick="send_message()" >发送</button> <div id="chat"> <p>message</p> </div> <script type="application/javascript"> var ws = new WebSocket("ws://127.0.0.1:8001/my_ws"); ws.onmessage = function (event_message) var p = document.createElement("p"); p.innerText = event_message.data; console.log(event_message.data); document.getElementById("chat").appendChild(p) ; function send_message() var send_msg = document.getElementById("send_msg").value; ws.send(send_msg); </script> </body> </html>
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