Storing query string as a key is useful if you are using a database to reply smartly with HTTP status 301/302/307 (redirect) or 407s (gone) instead of bare 404s (not found).

In reply to Re^4: CGI.pm: Want your query_string() sorted or unsorted? by dolmen
in thread CGI.pm: Want your query_string() sorted or unsorted? by markjugg

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