Module headers 

HTTP header constants for WiseGate.

This module centralizes all HTTP header names used throughout the codebase, avoiding magic strings and ensuring consistency.

Constants

AUTHORIZATION

Authorization header (for Basic Auth).

CONNECTION

Connection header (hop-by-hop).

CONTENT_LENGTH

Content-Length header.

CONTENT_TYPE

Content-Type header.

FORWARDED

Forwarded header (RFC 7239) - standardized proxy header.

HOP_BY_HOP_HEADERS

List of all hop-by-hop headers that should not be forwarded.

HOST

Host header.

KEEP_ALIVE

Keep-Alive header (hop-by-hop).

PROXY_AUTHENTICATE

Proxy-Authenticate header (hop-by-hop).

PROXY_AUTHORIZATION

Proxy-Authorization header (hop-by-hop).

TE

TE header (hop-by-hop).

TRAILER

Trailer header (hop-by-hop, RFC 9110 section 7.6.1).

TRAILERSDeprecated

Former, misspelled name of TRAILER. trailers is a TE token, not a header field, so matching it never removed the Trailer header.

TRANSFER_ENCODING

Transfer-Encoding header (hop-by-hop).

UPGRADE

Upgrade header (hop-by-hop).

WWW_AUTHENTICATE

WWW-Authenticate header (for 401 responses).

X_FORWARDED_FOR

X-Forwarded-For header - contains the originating client IP.

X_REAL_IP

X-Real-IP header - injected by WiseGate for upstream services.

Functions

connection_nominated

Returns the header names listed in the Connection header(s), lowercased.

is_hop_by_hop

Check if a header is a hop-by-hop header that shouldn’t be forwarded.

is_hop_by_hop_for

Returns true if a header must not be forwarded: either a fixed hop-by-hop header or one nominated by Connection (see connection_nominated).