[英]TypeError: require(...).listen is not a function
I wrote this, but errors come up and i dont know how to fix我写了这个,但出现错误,我不知道如何解决
var http = require('http');
var clientHtml = require('fs').readFileSync('client.html');
var plainHttpServer = http.createServer(function (request, response) {
response.writeHead(200, { 'Content-Type': 'text/html' });
response.end(clientHtml);
}).listen(8080);
var files = require('fs');
var io = require('socket.io').listen(plainHttpServer);
io.set('origins', ['localhost:8080', '127.0.0.1:8080']);
and this error comes, i don't know how to fix, tell me这个错误来了,我不知道如何解决,告诉我
var io = require('socket.io').listen(plainHttpServer);
^
TypeError: require(...).listen is not a function
require('socket.io')
returns the socket.io Server class. require('socket.io')
返回 socket.io 服务器类。 It's a class, not an instance and thus not something you call .listen()
on.它是一个类,而不是一个实例,因此不是你调用
.listen()
的东西。 Depending upon what exactly you're trying to accomplish, there are a number of different ways you can use that Server class as you can see here in the doc .根据您要完成的具体任务,您可以通过多种不同的方式使用该 Server 类,如您在 doc中所见。 For example, you can do this:
例如,您可以这样做:
const Server = require('socket.io');
const io = new Server(somePort);
or this:或这个:
const io = require('socket.io')(somePort);
or to share an existing http server:或共享现有的 http 服务器:
const io = require('socket.io')(plainHttpServer);
The below snippet worked for me:下面的代码片段对我有用:
const io = require('socket.io')(server);
...
server.listen(3000)
I wrote this, but errors come up and i dont know how to fix我写了这个,但是出现错误,我不知道如何解决
var http = require('http');
var clientHtml = require('fs').readFileSync('client.html');
var plainHttpServer = http.createServer(function (request, response) {
response.writeHead(200, { 'Content-Type': 'text/html' });
response.end(clientHtml);
}).listen(8080);
var files = require('fs');
var io = require('socket.io').listen(plainHttpServer);
io.set('origins', ['localhost:8080', '127.0.0.1:8080']);
and this error comes, i don't know how to fix, tell me而这个错误来了,我不知道如何解决,告诉我
var io = require('socket.io').listen(plainHttpServer);
^
TypeError: require(...).listen is not a function
Do Simply Updated Code here:在这里简单地更新代码:
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
server.listen(process.env.PORT || 3000);
console.log('Server is running ');
you need to add cors properly to this and set client request url in cors您需要为此正确添加 cors 并在 cors 中设置客户端请求 url
const { Server } = require("socket.io")
const cors = require("cors");
app.use(cors());
const server = http.createServer(app)
const io = new Server(server,{
cors: {
origin: "http://localhost:3002" <--- here add client req url
}
});
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