How to determine a user's IP address in node

Question

How can I determine the IP address of a given request from within a controller? For example (in express):

app.post(\'/get/ip/address\', function (req, res) {         


        

Answer 1

If you are using Graphql-Yoga you can use the following function:

const getRequestIpAddress = (request) => {
    const requestIpAddress = request.request.headers['X-Forwarded-For'] || request.request.connection.remoteAddress
    if (!requestIpAddress) return null

    const ipv4 = new RegExp("(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)")

    const [ipAddress] = requestIpAddress.match(ipv4)

    return ipAddress
}