问题
I have a simple node.js web server and I use socket.io.
The users can perform simple tasks on the server, which is a single page application running on /. If a user has an existing state on the server, the user's ID could be appended to the URL, e.g. /{my-id}.
I need to extract the ID from the URL when a socket.io connection is established. Is it any way to get the URL for the client page where the socket is created from; the referrer of the connection request?
回答1:
Using console.log I managed to find this value like this:
io.on('connection', function (socket) {
var referer = socket.request.headers.referer;
});
It works, but as it is not documented, I don't know if this is recommended, or if it's going to change.
来源：https://stackoverflow.com/questions/26044769/how-can-i-get-the-referer-for-a-socket-io-connection