Module identifier 

Server identifiers (AAuth §Server Identifiers) and origin comparison.

Functions

authority

The host[:port] a request to url is addressed to, lowercased.

is_server_identifier

https://host: lowercase, no port, path, query, fragment or trailing slash, and a host name rather than an IP address. Two identifiers compare by exact string equality.

same_origin

Whether two URLs share scheme, host and port.

trim

A URL with its trailing slashes removed.