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WWW Data Conversions

URL-escape
  perl -MURI::Escape -le 'print uri_escape($string)'

URI-unescape
  perl -MURI::Escape -le 'print uri_unescape($string)'

HTML Encode string
  perl -MHTML::Entities -le 'print encode_entities($string)'

HTML Decode
  perl -MHTML::Entities -le 'print decode_entities($string)'


File URI to file path (unescape)
  uri='file:///...'
  file=`perl -e '$_='"'$text_uri'"';
                 s%^[a-z]+://%%;
                 s/\%([A-Fa-f0-9._-]{2})/pack("C", hex($1))/seg;
                 print;' `

NOTE: Scripts should also look for and reject '..' or other bad behaviour.

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