LWP ships with a number of example applications / utilities such as GET, POST etc. One of these utilities is lwp-mirror.

From the documentation:

This program can be used to mirror a document from a WWW server. The document is only transfered if the remote copy is newer than the local copy. If the local copy is newer nothing happens.

In reply to Re^3: Best way to recursively grab a website by inman
in thread Best way to recursively grab a website by ghenry

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