Sometimes, we want to get the domain originating the request in Express.js and JavaScript.
In this article, we’ll look at how to get the domain originating the request in Express.js and JavaScript.
How to get the domain originating the request in Express.js and JavaScript?
To get the domain originating the request in Express.js and JavaScript, we use the host or origina headers or the req.socket.remoteAddress to get the IP address that the request originates from.
For instance, we write
const host = req.get("host");
to get the host header value.
We use
const origin = req.get("origin");
to get the origin header value, which has the host of the originating request for CORS requests.
We get the IP address of the originating request with
const userIP = req.socket.remoteAddress;
req is the request parameter in our route handler or middleware.
Conclusion
To get the domain originating the request in Express.js and JavaScript, we use the host or origina headers or the req.socket.remoteAddress to get the IP address that the request originates from.
