next up previous contents index
Next: 6.9.3 Unique object naming Up: 6.9 Details of Cache Previous: 6.9.1 Cache access protocols

6.9.2 Cacheable objects


It does not make sense to cache certain types of objects. For example, it doesn't make sense to cache queries, since the result of a query might change each time for some services. The following rules are used to determine which objects not to cache:

  1. Any HTTP URLs that do not use the 'GET' REQUEST_METHOD

  2. Any HTTP URLs that use a CGI program denoted by a ``?'' character in the URL, or ``/cgi-bin/'' in the URL.

  3. Any HTTP URLs with the Authorization tag in the MIME request header (this is used as a response to ``401'' messages when an HTTP server asks for a password before retrieving a file).

  4. Any ``401'' HTTP responses.

Duane Wessels
Wed Jan 31 23:46:21 PST 1996