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13 lines
489 B
TypeScript
13 lines
489 B
TypeScript
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/**
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* Generate a userId from request for tracking purposes.
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* Uses base64url encoding of IP for URL-safe identifier.
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* Note: base64 is reversible - this is NOT privacy protection.
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*/
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export function getUserIdFromRequest(req: Request): string {
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const forwardedFor = req.headers.get("x-forwarded-for")
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const rawIp = forwardedFor?.split(",")[0]?.trim() || "anonymous"
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return rawIp === "anonymous"
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? rawIp
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: `user-${Buffer.from(rawIp).toString("base64url")}`
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}
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