Dovecot HTTP Client

HTTP requests within Dovecot are performed using its internal HTTP client (internally referred to as "lib-http").

Internal HTTP Response Codes

Dovecot's lib-http uses custom HTTP response codes for some error conditions.

In certain locations, e.g. lib-lua: HTTP Functions, these codes may be visible to an admin or in logging, so these response codes must be handled in the same way that standard RFC codes are.

Number	Code	Description
9000	ABORTED	The request was aborted.
9001	INVALID_URL	Failed to parse HTTP target url.
9002	HOST_LOOKUP_FAILED	Failed to perform DNS lookup for the host.
9003	CONNECT_FAILED	Failed to setup any connection for the host and client settings allowed no more attempts.
9004	INVALID_REDIRECT	Service returned an invalid redirect response for this request.
9005	CONNECTION_LOST	The connection was lost unexpectedly while handling the request and client settings allowed no more attempts.
9006	BROKEN_PAYLOAD	The input stream passed to the request using http_client_request_set_payload() returned an error while sending the request.
9007	BAD_RESPONSE	The service returned a bad response.
9008	TIMED_OUT	The request timed out (either this was the last attempt or the absolute timeout was hit).