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我一直在嘗試從Socket.IO文檔執行這個簡單的第一個示例,它似乎沒有以我嘗試過的任何方式工作。來自Socket.IO 1.4.3文檔的示例給出了錯誤
這裏是我的代碼:
var io = require('socket.io');
io.listen(server);
io.on('connection', function (socket) {
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data) {
console.log(data);
});
});
而以下是錯誤日誌:
/home/chetan/project/app.js:70
io.on('connection', function (socket) {
^
TypeError: Object function Server(srv, opts){
if (!(this instanceof Server)) return new Server(srv, opts);
if ('object' == typeof srv && !srv.listen) {
opts = srv;
srv = null;
}
opts = opts || {};
this.nsps = {};
this.path(opts.path || '/socket.io');
this.serveClient(false !== opts.serveClient);
this.adapter(opts.adapter || Adapter);
this.origins(opts.origins || '*:*');
this.sockets = this.of('/');
if (srv) this.attach(srv, opts);
} has no method 'on'
at Object.<anonymous> (/home/chetan/project/app.js:70:4)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:902:3
我在日誌中一直盯着一兩分鐘,但似乎無法理解怎麼了。
io.sockets.on('connection', function (socket) {
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data) {
console.log(data);
});
});
產生以下錯誤:
io.sockets.on('connection', function (socket) {
^
TypeError: Cannot call method 'on' of undefined
at Object.<anonymous> (/home/chetan/project/app.js:70:12)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:902:3
你覺得可能是錯的
我甚至用這種方式試過嗎?