Module http_handler 

HTTP handlers for ACME HTTP-01 challenge responses.

This module provides an HttpChallengeHandler that can intercept incoming HTTP requests and respond to ACME HTTP-01 challenge validation attempts. It checks whether a request path matches the well-known ACME challenge prefix, looks up the corresponding key authorization (first in a local in-memory map, then optionally in shared Storage), and returns it.

For non-challenge requests the handler returns None, allowing the caller to fall through to its normal request handling logic.

Also includes a helper for constructing HTTPS redirect URLs.

Structs

HttpChallengeHandler

Handles HTTP-01 ACME challenge requests.

Constants

ACME_CHALLENGE_PATH_PREFIX

The well-known URL path prefix for ACME HTTP-01 challenge requests (RFC 8555 Section 8.3).

ZEROSSL_VALIDATION_PATH_PREFIX

The well-known URL path prefix for ZeroSSL HTTP validation requests.

Functions

extract_challenge_token

Extract the challenge token from an ACME HTTP-01 challenge path.

https_redirect_url

Build an HTTPS redirect URL from the given host and path.

is_challenge_request

Returns true if path looks like an ACME HTTP-01 challenge request.

is_valid_challenge_token

Validate that a challenge token contains only valid base64url characters.