# Functions
CheckValidDownloadURI checks whether specified string is a valid HTTP URI.
PgpBytesFromSource returns clean PGP key from raw source or remote URI.
WithHeaders injects specified headers into a download client.
# Constants
PgpSourceRawPrefix prefixes raw PGP keys.
PgpSourceURIPrefix prefixes URI pointing to remote PGP key.
# Variables
Headers is a collection of headers used in download client.
# Interfaces
Downloader is an interface allowing download of an artifact.
Reloader is an interface allowing to reload artifact config.
Verifier is an interface verifying GPG key of a downloaded artifact.