我正在尝试在Flask Web套接字应用程序的服务器端脚本内创建时间延迟。
最终,我希望服务器处理多个同时的请求,并能够以固定的时间间隔将两个数据包发回客户端。
当我在两个time.sleep(x)
语句之间使用flask_socketio.emit
时,在睡眠完成后,客户端将一起接收套接字发出事件。
如何在python flask应用程序中实现Emit X; wait Y seconds; emit Z
?
服务器端代码摘录:
from flask import Flask, request
from flask_socketio import SocketIO, join_room, emit
app = Flask(__name__)
socketio = SocketIO(app)
@socketio.on('ping')
def ping(appState):
"""send 2 pings, between a time interval"""
room = appState["sessionID"]
emit('serverPingResponse', {'room': room, 'msg':"Ping Received by Server"})
time.sleep(5)
emit('serverPingResponse', {'room': room, 'msg':"2nd time-delayed ping"})
return
客户端代码摘录:
var socket = io.connect('http://' + document.domain + ':' + location.port);
socket.on("serverPingResponse", function(msg){
// listen to server ping and print the message to console
let d = new Date();
console.log("ping received at "+d.toLocaleTimeString(), msg)
});
控制台输出
pinging server...
ping received at 10:43:14 AM
Object { room: "wvdhj01f3p", msg: "Ping Received by Server" }
ping received at 10:43:14 AM
Object { room: "wvdhj01f3p", msg: "2nd time-delayed ping" }
所需的输出将是在10:43:09
处接收第一次ping,在10:43:14
处接收第二个ping>
我正在尝试在Flask Web套接字应用程序的服务器端脚本内创建时间延迟。最终,我希望服务器能够处理许多同时发生的请求,并能够发回给...
您正在使用time.sleep()
函数,我猜这正在阻止您的服务器。尝试改用socketio.sleep()
,它将与您正在使用的异步框架(eventlet,gevent)进行兼容的睡眠。