[英]Not able to connect socket.io in nodejs
Hi I am trying to setup a connection with socket.IO but not able to do so.嗨,我正在尝试与 socket.IO 建立连接,但无法这样做。 At present I am not getting any error but the connection is not taking place.Please find below the relevant details:
目前我没有收到任何错误,但连接没有发生。请在下面找到相关详细信息:
app.js应用程序.js
const express = require('express');
require('./db/mongoose');
const functions = require("firebase-functions");
var bodyParser = require('body-parser');
const app = express();
const http = require('http').createServer(app);
var io = require('socket.io');
socket = io(http, {cors: {
origin: "http://localhost",
methods: ["GET", "POST"]
}
});
var cors = require("cors");
var cookieParser = require('cookie-parser');
var path = require('path');
app.use(cors());
const portCheck = process.env.PORT || 3001
socket.on('connection', function (socket) {
console.log('connected to socket');
socket.emit('greeting-from-server', {
greeting: 'Hello Client'
});
});
app.listen(portCheck, ()=> {
console.log('Server Listening to port:' + portCheck);
})
Changes should done for your code as follows:应按如下方式对您的代码进行更改:
socket.on(//...)
with io.on(//...)
socket.on(//...)
io.on(//...)
const app = express();const http =
require('http').createServer(app);
with和
var server = require('http').Server(app);
var io = require('socket.io')(server);
After the changes code is like follows.修改后的代码如下。
const express = require('express');
require('./db/mongoose');
const functions = require("firebase-functions");
var bodyParser = require('body-parser');
const app = express();
var server = require('http').Server(app);
var io = require('socket.io')(server);
socket = io(http, {cors: {
origin: "http://localhost",
methods: ["GET", "POST"]
}
});
var cors = require("cors");
var cookieParser = require('cookie-parser');
var path = require('path');
app.use(cors());
const portCheck = process.env.PORT || 3001
server.listen(portCheck, ()=> {
console.log('Server Listening to port:' + portCheck);
})
io.on('connection', (socket)=> {
socket.on('connection', function (socket) {
console.log('connected to socket');
socket.emit('greeting-from-server', {
greeting: 'Hello Client'
});
});
});
follow more information through this link.通过此链接了解更多信息。 https://socket.io/get-started/chat .
https://socket.io/get-started/chat 。
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