正在使用套接字与CORS策略斗争。伊奥·诺德斯

我已经找到了很多关于CORS政策问题的信息,但即使我尝试了我在这里找到的所有解决方案,也没有任何效果。

我最后一次尝试是在nodejs服务器中:

var express = require('express');
var app = express();

var spawn = require('child_process').spawn;
var fs = require('fs');

app.use(express.static('public'));

const server = require('https').createServer({
    key: fs.readFileSync('/home/example/ssl/keys/c231f_0ca89_7b80bf6d84934d212df326eee9c6319f.key'),
    cert: fs.readFileSync('/home/example/ssl/certs/streaming_desytec_com_c231f_0ca89_1609334228_a73b63988075270c9f680f383b6e6a99.crt')
}, app);

var io = require('socket.io')(server);
io.set('origins', 'https://localhost:44356');

尽管我努力解决这个问题,但我总是在套接字中遇到这个错误。io客户端:

Access to XMLHttpRequest at 'https://streaming.example.com/socket.io/?framespersecond=15&audioBitrate=22050&EIO=3&transport=polling&t=NJbfyAD' from origin 'https://localhost:44356' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

我怎样才能真正解决这个问题?

我的网站位于localhost中,nodejs服务器远程运行在linux服务器上。

编辑:我有最后一次尝试:

var cors = require('cors')

var corsOptions = {
  origin: 'https://localhost:44356',
  optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204
}

app.use(cors());
app.get('/socket.io/', cors(corsOptions), function (req, res, next) {
  res.json({msg: 'This is CORS-enabled for all origins!'})
})

app.use(express.static('public'));

它仍然不起作用。我想知道 app.get 考虑到服务器的URL将是:

/socket.io/?framespersecond=15&audioBitrate=22050&EIO=3&transport=polling&t=NJbfyAD