HTTP registry: proxy_loop_detected

The intermediary tried to forward the request to itself, or a loop has been detected using different means (e.g.,).

Proxy and gateway values describe processing across trust boundaries where fields, authority, and framing may be transformed. proxy_loop_detected is registered in HTTP Proxy Error Types. Defining reference: rfc9209.

httpregistryhttp-proxy-statushttp-proxy-error-types

Identifier (http)

proxy_loop_detected

The intermediary tried to forward the request to itself, or a loop has been detected using different means (e.g.,).

Strip hop-by-hop data, normalize framing, trust forwarded metadata only from configured proxies, and avoid exposing topology or credentials.

This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.

IANA registry: http-proxy-status/http-proxy-error-types

Registry reference: rfc9209

Sources

HTTP Proxy Error Types
rfc9209