HTTP的生命周期通过 Request 来界定，也就是一个 Request 一个 Response ，那么在 HTTP1.0 中，这次HTTP请求就结束了。
在HTTP1.1中进行了改进，使得有一个keep-alive，也就是说，在一个HTTP连接中，可以发送多个Request，接收多个Response。但是请记住 Request = Response， 在HTTP中永远是这样，也就是说一个request只能有一个response。而且这个response也是被动的，不能主动发起。
import json from flask import Flask,request,render_template from geventwebsocket.handler import WebSocketHandler from gevent.pywsgi import WSGIServer from geventwebsocket.websocket import WebSocket app = Flask(__name__) user_socket_dict = {} @app.route("/conn_ws/<user_nick>") def ws_app(user_nick): user_socket = request.environ.get("wsgi.websocket") # type:WebSocket 会有提示语句 user_socket_dict[user_nick] = user_socket print(len(user_socket_dict),list(user_socket_dict.keys())) while True: msg = user_socket.receive() #接受消息 msg_dict = json.loads(msg) to_user = msg_dict.get("to_user") to_user_socket = user_socket_dict.get(to_user) to_user_socket.send(msg) #回复消息 @app.route("/") def index(): return render_template("my_ws.html") if __name__ == '__main__': # app.run() http_serv = WSGIServer(("0.0.0.0",9527),app,handler_class=WebSocketHandler) #设置websocket http_serv.serve_forever() #启动websocket
单聊
import json from flask import Flask,request,render_template from geventwebsocket.handler import WebSocketHandler from gevent.pywsgi import WSGIServer from geventwebsocket.websocket import WebSocket app = Flask(__name__) user_socket_dict = {} @app.route("/conn_ws/<user_nick>") def ws_app(user_nick): user_socket = request.environ.get("wsgi.websocket") # type:WebSocket user_socket_dict[user_nick] = user_socket print(len(user_socket_dict),list(user_socket_dict.keys())) while True: msg = user_socket.receive() msg_dict = json.loads(msg) to_user = msg_dict.get("to_user") to_user_socket = user_socket_dict.get(to_user) to_user_socket.send(msg) @app.route("/") def index(): return render_template("my_ws.html") if __name__ == '__main__': # app.run() http_serv = WSGIServer(("0.0.0.0",9527),app,handler_class=WebSocketHandler) http_serv.serve_forever()
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <p><input type="text" id="nick"><button onclick="login()">登陆聊天室</button></p> 发送给：<input type="text" id="to_user">消息：<input type="text" id="send_str"> <button id="send_btn" onclick="send()">发送消息</button> <p> <div id="chat_list"> </div> </p> </body> <script type="application/javascript"> var ws = null; // ws.onopen = function(){ // ws.send("123"); // } function login() { var nick = document.getElementById("nick").value; ws = new WebSocket("ws://192.168.11.133:9527/conn_ws/"+nick); ws.onmessage = function (messageEvent) { console.log(messageEvent.data); var ptag = document.createElement("p"); var message = JSON.parse(messageEvent.data); ptag.innerText =message.from_user + " : " + message.message ; document.getElementById("chat_list").appendChild(ptag); }; } // document.getElementById("send_btn").addEventListener("onclick",) function send() { var message = document.getElementById("send_str").value; var send_str = { from_user:document.getElementById("nick").value, to_user:document.getElementById("to_user").value, message:message }; var json_send_str = JSON.stringify(send_str); ws.send(json_send_str); } </script> </html>
群聊
from flask import Flask,request,render_template from geventwebsocket.handler import WebSocketHandler from gevent.pywsgi import WSGIServer from geventwebsocket.websocket import WebSocket app = Flask(__name__) user_socket_list = [] @app.route("/conn_ws") def ws_app(): user_socket = request.environ.get("wsgi.websocket") # type:WebSocket user_socket_list.append(user_socket) print(len(user_socket_list),user_socket_list) while True: msg = user_socket.receive() print(msg) for usocket in user_socket_list: usocket.send(msg) @app.route("/") def index(): return render_template("my_ws.html") if __name__ == '__main__': # app.run() http_serv = WSGIServer(("0.0.0.0",9527),app,handler_class=WebSocketHandler) http_serv.serve_forever()
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <input type="text" id="send_str"> <button id="send_btn" onclick="send()">发送消息</button> <p> <div id="chat_list"> </div> </p> </body> <script type="application/javascript"> var ws = new WebSocket("ws://192.168.11.133:9527/conn_ws"); ws.onmessage = function (messageEvent) { console.log(messageEvent.data); var ptag = document.createElement("p"); ptag.innerText = messageEvent.data; document.getElementById("chat_list").appendChild(ptag); }; // document.getElementById("send_btn").addEventListener("onclick",) function send() { var send_str = document.getElementById("send_str").value; ws.send(send_str); } </script> </html>