How to get client IP address in a Firebase cloud function?
This worked for me:
const express = require('express');
const logIP = async (req : any, res : any, next : any) => {
const clientIP = req.headers['x-forwarded-for'] || req.connection.remoteAddress || req.headers['fastly-client-ip'];
}
const logIPApp = express();
logIPApp.use(logIP);
exports.reportIP = functions.https.onRequest(logIPApp);
The clients IP is in request.ip
.
Example:
export const pay = functions.https.onRequest((request, response) => {
console.log(`My IP is ${request.ip}`);
});
If you are looking for the client ip thru firebase hosting you should use the header fastly-client-ip
there will be the real client ip.
The IP address seems to be available in req.headers["x-forwarded-for"]
.
See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For
Note that if there are proxies in between the interim ip addresses are concatenated towards the end:
X-Forwarded-For: <client_ip>, <proxy_1 : actual-ip-as-seen-by-google> ...