I think you're supposed to disable external requests using various constructor parameters (as in XML::LibXML::Parser.pod.

I presume that ext_ent_handler with your own callback to handle external entities would be enough, but I would still use or no_network to be on the safe(r) side.

In reply to Re^3: Best XML library to validate XML from untrusted source by Corion
in thread Best XML library to validate XML from untrusted source by vsespb

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