3.11 Library http/http_host -- Obtain public server location

This library finds the public address of the running server. This can be used to construct URLs that are visible from anywhere on the internet. This module was introduced to deal with OpenID, where a reques is redirected to the OpenID server, which in turn redirects to our server (see http_openid.pl).

The address is established from the settings http:public_host and http:public_port if provided. Otherwise it is deduced from the request.

[det]http_current_host(+Request, -Hostname, -Port, Options)

Current global host and port of the HTTP server. This is the basis to form absolute address, which we need for redirection based interaction such as the OpenID protocol. Options are:

global(+Bool)

If true (default false), try to replace a local hostname by a world-wide accessible name.