ns_checkurl

Authorize a request using basic HTTP authentication.

Syntax

ns_checkurl method url authuser authpasswd ?ipaddr?

Description

This function does the same permission check that the AOLserver does before serving a URL. If the nsperm module is loaded, the algorithm is as follows.

1. If the authuser is "nsadmin", the password is correct, and the IP
   address of the client is allowed nsadmin access, then access is
   authorized.
2. Find the relevant permission record. If an exact match for the
   method and URL combination is not found, the end of the URL is
   pared down until a match is found. For example, if there is no
   match for `/products/cereals/raisin_bran.html,' then the server
   looks for a permission record for the URL `/products/cereals.' If
   that permission record is specified as "Exact URL match is NOT
   required", then that permission record is used.

By default, the server comes with a row that says GET on `/' is open to the world.

If no relevant permission record is found, access is denied (forbidden).

1. If the authuser is in the "Allow Users" list, access is permitted.
   If the authuser is a member of a group in the "Allow Groups" list
   and not in the "Deny Users' list, access is permitted.
2. If the host is in the "Hosts to allow" list, access is permitted.
   If the host is in the "Hosts to deny" list, access is denied.
3. If the request does not come in with authorization data, access is
   denied.
4. The user and password are verified. If there is no password
   specified in the database, any password is accepted.
5. Otherwise, access is denied.

Return Values

The following values can be returned by ns_checkurl.

OK
The user has permission to execute this URL and method.
DENIED
The user does not have permission to execute this URL and method.
FORBIDDEN
There is no possible user/password/IP Address combination that would give authorization.
ERROR
There was an error.

If the permissions module is not loaded, an error is returned.