socket.io无法调用方法';发射';未定义的类型(使用node.js和express、jade)
我正在跟踪聊天,虽然有点老了,但我确实是从这个开始的 然而,在完成了该页面中描述的所有作业后,我发现以下错误:socket.io无法调用方法';发射';未定义的类型(使用node.js和express、jade),node.js,socket.io,chat,emit,Node.js,Socket.io,Chat,Emit,我正在跟踪聊天,虽然有点老了,但我确实是从这个开始的 然而,在完成了该页面中描述的所有作业后,我发现以下错误: TypeError: Cannot call method 'emit' of undefined at /Users/juneyoungoh/Documents/Nodejs/ChatSample/app.js:109:29 at Array.forEach (native) at userJoined (/Users/juneyoungoh/Document
TypeError: Cannot call method 'emit' of undefined
at /Users/juneyoungoh/Documents/Nodejs/ChatSample/app.js:109:29
at Array.forEach (native)
at userJoined (/Users/juneyoungoh/Documents/Nodejs/ChatSample/app.js:108:33)
at Socket.<anonymous> (/Users/juneyoungoh/Documents/Nodejs/ChatSample/app.js:62:7)
at Socket.EventEmitter.emit (events.js:98:17)
at Socket.onevent (/Users/juneyoungoh/Documents/Nodejs/ChatSample/node_modules/socket.io/lib/socket.js:330:8)
at Socket.onpacket (/Users/juneyoungoh/Documents/Nodejs/ChatSample/node_modules/socket.io/lib/socket.js:290:12)
at Client.ondecoded (/Users/juneyoungoh/Documents/Nodejs/ChatSample/node_modules/socket.io/lib/client.js:193:14)
at Decoder.Emitter.emit (/Users/juneyoungoh/Documents/Nodejs/ChatSample/node_modules/socket.io/node_modules/socket.io-parser/node_modules/component-emitter/index.js:134:20)
at Decoder.add (/Users/juneyoungoh/Documents/Nodejs/ChatSample/node_modules/socket.io/node_modules/socket.io-parser/index.js:247:12)
所以我跟踪对象io.sockets
,我在屏幕上看到的内容如下
{ name: '/',
server:
{ nsps: { '/': [Circular] },
_path: '/socket.io',
_serveClient: true,
_adapter: [Function: Adapter],
_origins: '*:*',
sockets: [Circular],
eio:
{ clients: [Object],
clientsCount: 1,
pingTimeout: 60000,
pingInterval: 25000,
upgradeTimeout: 10000,
maxHttpBufferSize: 100000000,
transports: [Object],
allowUpgrades: true,
allowRequest: [Function],
cookie: 'io',
ws: [Object],
_events: [Object] },
httpServer:
{ domain: null,
_events: [Object],
_maxListeners: 10,
_connections: 7,
connections: [Getter/Setter],
_handle: [Object],
_usingSlaves: false,
_slaves: [],
allowHalfOpen: true,
httpAllowHalfOpen: false,
timeout: 120000,
_connectionKey: '4:0.0.0.0:3000' },
engine:
{ clients: [Object],
clientsCount: 1,
pingTimeout: 60000,
pingInterval: 25000,
upgradeTimeout: 10000,
maxHttpBufferSize: 100000000,
transports: [Object],
allowUpgrades: true,
allowRequest: [Function],
cookie: 'io',
ws: [Object],
_events: [Object] } },
sockets:
[ { nsp: [Circular],
server: [Object],
adapter: [Object],
id: 'AmJ6dbF_Y_Kus1tcAAAB',
client: [Object],
conn: [Object],
rooms: [Object],
acks: {},
connected: true,
disconnected: false,
handshake: [Object],
_events: [Object] } ],
connected:
{ AmJ6dbF_Y_Kus1tcAAAB:
{ nsp: [Circular],
server: [Object],
adapter: [Object],
id: 'AmJ6dbF_Y_Kus1tcAAAB',
client: [Object],
conn: [Object],
rooms: [Object],
acks: {},
connected: true,
disconnected: false,
handshake: [Object],
_events: [Object] } },
fns: [],
ids: 0,
acks: {},
adapter:
{ nsp: [Circular],
rooms: { AmJ6dbF_Y_Kus1tcAAAB: [Object] },
sids: { AmJ6dbF_Y_Kus1tcAAAB: [Object] },
encoder: {} },
_events: { connection: [Function] } }
我完全理解为什么我无法获取io.sockets.sockets[sId]
,因为io.sockets.sockets
没有密钥
要修复此结构,我是否应该在连接上执行额外的工作
事件?
我现在的连接处理程序是
io.sockets.on('connection', function(socket){
socket.on('set username', function(userName){
if (clients[userName] === undefined) {
clients[userName] = socket.id;
socketsOfClients[socket.id] = userName;
userNameAvailable(socket.id, userName);
userJoined(userName);
} else {
if (clients[userName] == socket.id) {
} else {
userNameAlreadyInUse(socket.id, userName);
}
}
});
}
谢谢 这是socket.io的新版本
io.to('socket id')。emit('some event'))
那篇博文太老了
查看更新的聊天演示:
并且,您可以在此处下载源代码:
io.sockets.on('connection', function(socket){
socket.on('set username', function(userName){
if (clients[userName] === undefined) {
clients[userName] = socket.id;
socketsOfClients[socket.id] = userName;
userNameAvailable(socket.id, userName);
userJoined(userName);
} else {
if (clients[userName] == socket.id) {
} else {
userNameAlreadyInUse(socket.id, userName);
}
}
});
}