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16 changes: 8 additions & 8 deletions src/lib/client-ip.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -12,10 +12,10 @@ describe('getClientIp', () => {
expect(getClientIp(request)).toBe('192.168.1.1');
});

it('returns socket.remoteAddress when request.ip is undefined', () => {
it('returns raw.socket.remoteAddress when request.ip is undefined', () => {
const request = {
ip: undefined,
socket: { remoteAddress: '10.0.0.2' },
raw: { socket: { remoteAddress: '10.0.0.2' } },
} as unknown as FastifyRequest;
expect(getClientIp(request)).toBe('10.0.0.2');
});
Expand All @@ -25,14 +25,14 @@ describe('getClientIp', () => {
expect(getClientIp(request)).toBe('192.168.1.1');
});

it('returns "unknown" when neither ip nor socket.remoteAddress is available', () => {
const request = { ip: undefined, socket: {} } as unknown as FastifyRequest;
expect(getClientIp(request)).toBe('unknown');
it('returns empty string when neither ip nor socket.remoteAddress is available', () => {
const request = { ip: undefined, raw: { socket: {} } } as unknown as FastifyRequest;
expect(getClientIp(request)).toBe('');
});

it('returns "unknown" when request has no socket', () => {
const request = { ip: undefined } as unknown as FastifyRequest;
expect(getClientIp(request)).toBe('unknown');
it('returns empty string when request.raw has no socket', () => {
const request = { ip: undefined, raw: {} } as unknown as FastifyRequest;
expect(getClientIp(request)).toBe('');
});
});

Expand Down
4 changes: 2 additions & 2 deletions src/lib/client-ip.ts
Original file line number Diff line number Diff line change
Expand Up @@ -8,11 +8,11 @@ import type { FastifyRequest } from 'fastify';
* returns that trusted value.
*/
export function getClientIp(request: FastifyRequest): string {
const ip = request.ip ?? (request as any).socket?.remoteAddress;
const ip = request.ip ?? request.raw.socket?.remoteAddress;
if (ip && typeof ip === 'string') {
// IPv6-mapped IPv4: ::ffff:192.168.1.1 -> 192.168.1.1
if (ip.startsWith('::ffff:')) return ip.slice(7);
return ip;
}
return 'unknown';
return '';
}
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