rfc: Use header provided by proxy to determine user country & location

[elavol]

Dupe Check

• I have searched Swetrix feature requests and there are no duplicates

Describe the solution you'd like?

Many proxies (CloudFront, Cloudflare...etc) already added headers which provide user location info and usually more accurate than lookup location via IP address. So IMO allow config to use these headers to determine user location is more efficient, and it also faster (since just need to read header). And fallback to use ip lookup if headers is omit.

Example

// Current code
const ip = getIPFromHeaders(headers) || reqIP || ''
const { country, city, region } = getGeoDetails(ip)

// New
let { ip, location } = getClientRequestInfo(headers);

if (!location) {
   location = getGeoDetails(ip);
}

Additional context

No response

How important is this feature to you?

3

[Blaumaus]

Hmm, honestly I don't think this is something worth doing at the moment

IP address lookup in .mmdb files is extremely fast (it can look up >500k IPs in 1 second). Swetrix CE comes with GeoIP database by default, and there is an option to provide a path to your custom one if you want to use a more accurate / fresh DB instead

But thanks for opening all these tickets and a PR, very happy to see people using and contributing to Swetrix :)

[elavol]

It's not just a speed, it's also the accuracy and up to date information.

• The free mmdb likely less accurate than info provide by big proxy (Cloudflare, Cloudfront)
• The GeoIP data changing over time. So rely on initialize mmdb will lead to inaccurate information after a while.
• Reduce the docker image size