Head is a procedure used to request the header values for the resource specified in
URL. Head is identical to
Get, except that the server does not return a message body in the
Response. Head can be used to obtain metainformation about the entity implied by the request without transferring the full content of the resource. Head is often used for testing the valuein
URL for validity, accessibility, and recent modification.
Head calls the DoRequest method to perform the HTTP transfer. The returned header values can be found in Response.