export function getIp()

in packages/better-auth/src/utils/get-request-ip.ts [4:33]

• 26 lines of code
• 9 McCabe index (conditional complexity)

export function getIp(
	req: Request | Headers,
	options: BetterAuthOptions,
): string | null {
	if (options.advanced?.ipAddress?.disableIpTracking) {
		return null;
	}
	const testIP = "127.0.0.1";
	if (isTest) {
		return testIP;
	}

	const headers = "headers" in req ? req.headers : req;

	const defaultHeaders = ["x-forwarded-for"];

	const ipHeaders =
		options.advanced?.ipAddress?.ipAddressHeaders || defaultHeaders;

	for (const key of ipHeaders) {
		const value = "get" in headers ? headers.get(key) : headers[key];
		if (typeof value === "string") {
			const ip = value.split(",")[0].trim();
			if (isValidIP(ip)) {
				return ip;
			}
		}
	}
	return null;
}