expressjsHow can I use the x-forwarded-for header in Express.js?
The x-forwarded-for header is a way to identify the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer. In Express.js, the x-forwarded-for header can be used to get the IP address of the client making the request.
To use the x-forwarded-for header in Express.js, you can access the header from the request object. Here is an example of how to use the x-forwarded-for header in Express.js:
// Access the x-forwarded-for header from the request object
const xForwardedFor = req.headers['x-forwarded-for']
// Log the IP address to the console
console.log(xForwardedFor)
Output example
192.168.1.1
This example code accesses the x-forwarded-for header from the request object and logs the IP address to the console.
Code explanation
req.headers['x-forwarded-for']
: This is used to access the x-forwarded-for header from the request object.console.log(xForwardedFor)
: This is used to log the IP address to the console.
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