Socket.io：服务器需要2个连接才能做出响应
我尝试与套接字io进行私聊（或群聊）。 为了尝试这个概念，我创build了一个包含用户名和房间的数组“person”。 检查用户是否存在并不存在，并且是将来的扩展。
我遇到的问题是，如果user1连接，他不能发送消息，直到user2连接。 用户2只能在用户3连接时发送消息。 如果我重新启动服务器，它们都可以发送。
任何线索我可能做错了什么？
应该注意的是，广播的作品，所以我怀疑，服务器configuration将是问题
服务器：
let numUsers = 0; let person = {user1: "1", user2: "1",user3: "2", user4: "2", user5: "1",user6: "3"}; io.on('connection', function (socket) { console.log("conn"); let addedUser = false; // when the client emits 'add user', this listens and executes socket.on('add user', function (username) { //if (person[username]) { // we store the username and room in the socket session for this client socket.username = username; socket.room = person[username]; console.log(socket.room); socket.join(socket.room); ++numUsers; addedUser = true; socket.to(socket.room).emit('login', { numUsers: socket.room }); // echo globally (all clients) that a person has connected socket.to(socket.room).emit('user joined', { username: socket.username, numUsers: numUsers }); //} }); // when the client emits 'new message', this listens and executes socket.on('new message', function (data) { console.log(" room:" + socket.room + ";user:"+ socket.username + ";data:" +data); // we tell the client to execute 'new message' socket.to(socket.room).emit('new message', { username: socket.username, message: data }); }); // // when the client emits 'typing', we broadcast it to others // socket.on('typing', function () { // socket.to(socket.room).emit('typing', { // username: socket.username // }); // }); // // // when the client emits 'stop typing', we broadcast it to others // socket.on('stop typing', function () { // socket.to(socket.room).emit('stop typing', { // username: socket.username // }); // }); //when the user disconnects.. perform this socket.on('disconnect', function () { if (addedUser) { --numUsers; socket.to(socket.room).emit('user left', { username: socket.username, numUsers: numUsers }); } }); }); 客户：
$(function() { var FADE_TIME = 150; // ms var TYPING_TIMER_LENGTH = 400; // ms var COLORS = [ '#e21400', '#91580f', '#f8a700', '#f78b00', '#58dc00', '#287b00', '#a8f07a', '#4ae8c4', '#3b88eb', '#3824aa', '#a700ff', '#d300e7' ]; // Initialize variables var $window = $(window); var $usernameInput = $('.usernameInput'); // Input for username var $messages = $('.messages'); // Messages area var $inputMessage = $('.inputMessage'); // Input message input box var $loginPage = $('.login.page'); // The login page var $chatPage = $('.chat.page'); // The chatroom page // Prompt for setting a username var username; var connected = false; var typing = false; var lastTypingTime; var $currentInput = $usernameInput.focus(); var socket = io(); function addParticipantsMessage (data) { var message = ''; if (data.numUsers === 1) { message += "there's 1 participant"; } else { message += "there are " + data.numUsers + " participants"; } log(message); } // Sets the client's username function setUsername () { username = cleanInput($usernameInput.val().trim()); // If the username is valid if (username) { $loginPage.fadeOut(); $chatPage.show(); $loginPage.off('click'); $currentInput = $inputMessage.focus(); // Tell the server your username socket.emit('add user', username); } } // Sends a chat message function sendMessage () { var message = $inputMessage.val(); // Prevent markup from being injected into the message message = cleanInput(message); // if there is a non-empty message and a socket connection if (message && connected) { $inputMessage.val(''); addChatMessage({ username: username, message: message }); // tell server to execute 'new message' and send along one parameter socket.emit('new message', message); } } // Log a message function log (message, options) { var $el = $('<li>').addClass('log').text(message); addMessageElement($el, options); } // Adds the visual chat message to the message list function addChatMessage (data, options) { // Don't fade the message in if there is an 'X was typing' var $typingMessages = getTypingMessages(data); options = options || {}; if ($typingMessages.length !== 0) { options.fade = false; $typingMessages.remove(); } var $usernameDiv = $('<span class="username"/>') .text(data.username) .css('color', getUsernameColor(data.username)); var $messageBodyDiv = $('<span class="messageBody">') .text(data.message); var typingClass = data.typing ? 'typing' : ''; var $messageDiv = $('<li class="message"/>') .data('username', data.username) .addClass(typingClass) .append($usernameDiv, $messageBodyDiv); addMessageElement($messageDiv, options); } // Adds the visual chat typing message function addChatTyping (data) { data.typing = true; data.message = 'is typing'; addChatMessage(data); } // Removes the visual chat typing message function removeChatTyping (data) { getTypingMessages(data).fadeOut(function () { $(this).remove(); }); } // Adds a message element to the messages and scrolls to the bottom // el - The element to add as a message // options.fade - If the element should fade-in (default = true) // options.prepend - If the element should prepend // all other messages (default = false) function addMessageElement (el, options) { var $el = $(el); // Setup default options if (!options) { options = {}; } if (typeof options.fade === 'undefined') { options.fade = true; } if (typeof options.prepend === 'undefined') { options.prepend = false; } // Apply options if (options.fade) { $el.hide().fadeIn(FADE_TIME); } if (options.prepend) { $messages.prepend($el); } else { $messages.append($el); } $messages[0].scrollTop = $messages[0].scrollHeight; } // Prevents input from having injected markup function cleanInput (input) { return $('<div/>').text(input).html(); } // Updates the typing event function updateTyping () { if (connected) { if (!typing) { typing = true; socket.emit('typing'); } lastTypingTime = (new Date()).getTime(); setTimeout(function () { var typingTimer = (new Date()).getTime(); var timeDiff = typingTimer - lastTypingTime; if (timeDiff >= TYPING_TIMER_LENGTH && typing) { socket.emit('stop typing'); typing = false; } }, TYPING_TIMER_LENGTH); } } // Gets the 'X is typing' messages of a user function getTypingMessages (data) { return $('.typing.message').filter(function (i) { return $(this).data('username') === data.username; }); } // Gets the color of a username through our hash function function getUsernameColor (username) { // Compute hash code var hash = 7; for (var i = 0; i < username.length; i++) { hash = username.charCodeAt(i) + (hash << 5) - hash; } // Calculate color var index = Math.abs(hash % COLORS.length); return COLORS[index]; } // Keyboard events $window.keydown(function (event) { // Auto-focus the current input when a key is typed if (!(event.ctrlKey || event.metaKey || event.altKey)) { $currentInput.focus(); } // When the client hits ENTER on their keyboard if (event.which === 13) { if (username) { sendMessage(); socket.emit('stop typing'); typing = false; } else { setUsername(); } } }); $inputMessage.on('input', function() { updateTyping(); }); // Click events // Focus input when clicking anywhere on login page $loginPage.click(function () { $currentInput.focus(); }); // Focus input when clicking on the message input's border $inputMessage.click(function () { $inputMessage.focus(); }); // Socket events // Whenever the server emits 'login', log the login message socket.on('login', function (data) { connected = true; // Display the welcome message var message = "Welcome to Socket.IO Chat – "; log(message, { prepend: true }); addParticipantsMessage(data); }); // Whenever the server emits 'new message', update the chat body socket.on('new message', function (data) { addChatMessage(data); }); // Whenever the server emits 'user joined', log it in the chat body socket.on('user joined', function (data) { log(data.username + ' joined'); addParticipantsMessage(data); }); // Whenever the server emits 'user left', log it in the chat body socket.on('user left', function (data) { log(data.username + ' left'); addParticipantsMessage(data); removeChatTyping(data); }); // Whenever the server emits 'typing', show the typing message socket.on('typing', function (data) { addChatTyping(data); }); // Whenever the server emits 'stop typing', kill the typing message socket.on('stop typing', function (data) { removeChatTyping(data); }); socket.on('disconnect', function () { log('you have been disconnected'); }); socket.on('reconnect', function () { log('you have been reconnected'); if (username) { socket.emit('add user', username); } }); socket.on('reconnect_error', function () { log('attempt to reconnect has failed'); }); });
HTML：
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Socket.IO Chat Example</title> <link rel="stylesheet" href="style.css"> </head> <body> <ul class="pages"> <li class="chat page"> <div class="chatArea"> <ul class="messages"></ul> </div> <input class="inputMessage" placeholder="Type here..."/> </li> <li class="login page"> <div class="form"> <h3 class="title">What's your nickname?</h3> <input class="usernameInput" type="text" maxlength="14" /> </div> </li> </ul> <script src="https://code.jquery.com/jquery-1.10.2.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.3/socket.io.js"></script> <script src="/main.js"></script> </body> </html>
我通过更换所有的socket.to(socket.room).emit来解决这个问题
io.sockets.to(socket.room).emit在服务器端，客户端不需要改变