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export const IP_ADDRESS_HEADERS = [
'true-client-ip', // CDN
'cf-connecting-ip', // Cloudflare
'fastly-client-ip', // Fastly
'x-nf-client-connection-ip', // Netlify
'do-connecting-ip', // Digital Ocean
'x-real-ip', // Reverse proxy
'x-appengine-user-ip', // Google App Engine
'x-forwarded-for',
'forwarded',
'x-client-ip',
'x-cluster-client-ip',
'x-forwarded',
];
export function getIpAddress(headers: Headers) {
const customHeader = process.env.CLIENT_IP_HEADER;
if (customHeader && headers.get(customHeader)) {
return headers.get(customHeader);
}
const header = IP_ADDRESS_HEADERS.find(name => {
return headers.get(name);
});
const ip = headers.get(header);
if (header === 'x-forwarded-for') {
return ip?.split(',')?.[0]?.trim();
}
if (header === 'forwarded') {
const match = ip.match(/for=(\[?[0-9a-fA-F:.]+\]?)/);
if (match) {
return match[1];
}
}
return ip;
}
export function stripPort(ip: string) {
if (ip.startsWith('[')) {
const endBracket = ip.indexOf(']');
if (endBracket !== -1) {
return ip.slice(0, endBracket + 1);
}
}
const idx = ip.lastIndexOf(':');
if (idx !== -1) {
if (ip.includes('.') || /^[a-zA-Z0-9.-]+$/.test(ip.slice(0, idx))) {
return ip.slice(0, idx);
}
}
return ip;
}
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