The first three values of the list returned are the document type, the size of the document, and the age of the document. More control over the request or access to all header values returned require that you use the object oriented interface described for GET above. There is no simple procedural interface for posting data to a WWW server. You must use the object oriented interface for this. Some sites use proxies to go through fire wall machines, or just as cache in order to improve performance.
Some sites like to play games with cookies.
By default LWP ignores cookies provided by the servers it visits. LWP will collect cookies and respond to cookie requests if you set up a cookie jar. If the document you want to fetch is too large to be kept in memory, then you have two alternatives.