HTTP registry: http_response_header_size
The intermediary received a response to the request containing an individual header field line that was considered too large.
Proxy and gateway values describe processing across trust boundaries where fields, authority, and framing may be transformed. http_response_header_size is registered in HTTP Proxy Error Types. Defining reference: rfc9209.
Identifier (http)
http_response_header_size
The intermediary received a response to the request containing an individual header field line that was considered too large.
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