如何断开客户端在特定时间内处于非活动状态（socket.io，javascript）

Question

在这个聊天应用程序中，我希望服务器断开在 x（可配置）时间内处于非活动状态的客户端。

我认为默认值为 60 秒，我认为我应该使用页面超时，如您在我的服务器文件中看到的那样，但不确定如何使其工作。

我们的想法是设置一个计时器，让我们假设 2 分钟不活动，然后您会被踢出，然后在 name.js 文件的 feedbackBox 函数中出现一条消息。

我的代码如下：

server.js

const PORT = 3000;
const io = require('socket.io')(PORT, {
  pingTimeout: 60000
});
const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.sendFile(__dirname + '/index.html');
});

const users = {};

io.on('connection', socket => {
  socket.on('new-user', name => {
    if (Object.values(users).includes(name)) {
      socket.emit('name-taken', name);
    }
    if (!Object.values(users).includes(name)) {
      users[socket.id] = name;
      socket.emit('user-accepted');
      socket.broadcast.emit('user-connected', name);
    }
  });
  socket.on('send-chat-message', message => {
    socket.broadcast.emit('chat-message', {
      message: message,
      name: users[socket.id]
    });
  });
  socket.on('disconnect', reason => {
    socket.broadcast.emit('user-disconnected', users[socket.id]);
    delete users[socket.id];
  });
});

name.js

const container = document.querySelector('.container');
const nameContainer = document.createElement('section');
const title = document.createElement('h1');
const form = document.createElement('form');
const nameInput = document.createElement('input');
const submitName = document.createElement('button');

title.innerText = 'Enter Your Name';
submitName.innerText = 'Connect';

const getName = () => {
  form.addEventListener('submit', e => {
    e.preventDefault();
    const name = nameInput.value;
    socket.emit('new-user', name);
    nameInput.value = '';
    socket.off('name-taken');
    socket.on('name-taken', () => {
      feedbackBox('Nickname already taken');
    });
    socket.off('user-accepted');
    socket.on('user-accepted', () => {
      title.classList.add('hide');
      nameContainer.classList.add('hide');
      addMessageForm();
    });
  });
};

const appendForm = () => {
  nameInput.classList.add('name_input');
  form.appendChild(nameInput);
  submitName.classList.add('submit_name');
  form.appendChild(submitName);
  nameContainer.appendChild(form);
  nameContainer.classList.add('name_container');
  nameContainer.classList.remove('hide');
  title.classList.remove('hide');
  title.classList.add('name_title');
  container.appendChild(title);
  container.appendChild(nameContainer);
  getName();
};

聊天.js

//const socket = io('http://localhost:3000');

const showFeedback = document.createElement('section');
const messageContainer = document.createElement('section');
const messageForm = document.createElement('form');
const messageInput = document.createElement('input');
const submitMessage = document.createElement('button');
const disconnectButton = document.createElement('button');

submitMessage.innerText = 'Send';
disconnectButton.innerText = 'X';

messageContainer.classList.add('message-container');
messageForm.classList.add('send-container');
messageInput.classList.add('message-input');
submitMessage.classList.add('send-button');
disconnectButton.classList.add('disconnect-button');

const addMessageForm = () => {
  showFeedback.classList.add('hide');
  messageContainer.classList.remove('hide');
  messageForm.classList.remove('hide');
  disconnectButton.classList.remove('hide');
  messageForm.appendChild(messageInput);
  messageForm.appendChild(submitMessage);
  container.appendChild(disconnectButton);
  container.appendChild(messageContainer);
  container.appendChild(messageForm);
  appendMessage('You joined');
};
//const name = prompt('What is your name?');
//socket.emit('new-user', name);

socket.on('chat-message', data => {
  appendMessage(`${data.name}: ${data.message}`);
});

socket.on('user-connected', name => {
  appendMessage(`${name} connected`);
});

socket.on('user-disconnected', name => {
  appendMessage(`${name} left the chat`);
});

messageForm.addEventListener('submit', e => {
  e.preventDefault();
  const message = messageInput.value;
  appendMessage(`You: ${message}`);
  socket.emit('send-chat-message', message);
  messageInput.value = '';
});

function appendMessage(message) {
  const messageElement = document.createElement('section');
  messageElement.innerText = message;
  messageContainer.append(messageElement);
}

const feedbackBox = message => {
  showFeedback.innerText = message;
  showFeedback.classList.add('feedback-I-disconnect');
  showFeedback.classList.remove('hide');
  container.appendChild(showFeedback);
};

disconnectButton.addEventListener('click', event => {
  if (event.target.classList.contains('disconnect-button')) {
    socket.disconnect();
    messageContainer.classList.add('hide');
    messageForm.classList.add('hide');
    disconnectButton.classList.add('hide');
    appendForm();
    feedbackBox('You disconnected from the chat');
  }
});

Answer 1

您可以在套接字上设置超时并在每次收到来自该客户端的消息时清除超时：

socket.on("sent-chat-message", message => {
    clearTimeout(socket.inactivityTimeout);

    socket.inactivityTimeout = setTimeout(() => socket.disconnect(true), 1000 * 60);
});

我不确定连接是否会自动重新建立，在这种情况下，您也必须在客户端执行此操作。