SWI-Prolog -- http:authenticate/3

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - The HTTP server libraries
      - library(http/http_authenticate): Authenticate HTTP connections using 401 headers
        
        http_authenticate/3
        
        http_authorization_data/2
        
        http_current_user/3
        
        http_read_passwd_file/2
        
        http_write_passwd_file/2
        
        authenticate/3

[multifile]http:authenticate(+AuthData, +Request, -Fields)

Plugin for library(http_dispatch) to perform basic HTTP authentication.

This predicate throws http_reply(authorise(basic, Realm)).

`AuthData`	must be a term `basic(File, Realm)`
`Request`	is the HTTP request
`Fields`	describes the authenticated user with the option `user(User)` and with the option `user_details(Fields)` if the password file contains additional fields after the user and password.

[multifile]http:authenticate(+Digest, +Request, -Fields)

Plugin for library(http_dispatch) to perform basic HTTP authentication. Note that we keep the authentication details cached to avoid a‘nonce-replay' error in the case that the application tries to verify multiple times.

This predicate throws http_reply(authorise(digest(Digest)))

`Digest`	is a term `digest(File, Realm, Options)`
`Request`	is the HTTP request
`Fields`	describes the authenticated user with the option `user(User)` and with the option `user_details(Fields)` if the password file contains additional fields after the user and password.