如何斷開客戶端在特定時間（socket.io，javascript）在聊天中處於非活動狀態

Question

在這個聊天應用程序中，我希望服務器斷開在 x（可配置）時間內處於非活動狀態的客戶端。

我認為默認值為 60 秒，我認為我應該使用頁面超時，正如您在我的服務器文件中看到的那樣，但不確定如何使其工作。

這個想法是有一個計時器，假設 2 分鍾不活動，然后你會被踢出去，然后在 name.js 文件的反饋框函數中出現一條消息。

我的代碼如下：

服務器.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];
  });
});

名稱.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

您可以在套接字上設置超時並在每次收到來自該客戶端的消息時清除超時：

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

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

我不確定連接是否會自動重新建立，在這種情況下，您也必須在客戶端執行此操作。