[ ijbswa-Bugs-3429848 ] better implementation of check-decoded-url

Bugs item #3429848, was opened at 2011-10-28 12:36
Message generated for change (Tracker Item Submitted) made by jwz
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Category: funct: filtering
Group: version 3.0.17
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jamie Zawinski (jwz)
Assigned to: Nobody/Anonymous (nobody)
Summary: better implementation of check-decoded-url

Initial Comment:
Here is a better implementation of "fast-redirects{check-decoded-url}" that actually works properly with sites like Facebook.

The old implementation took the entire URL; decoded it; and then looked for the last http:.  That doesn't work with URL redirectors done the way most modern sites do it, e.g.,

http://www.facebook.com/l.php?u=http%3A%2F%2F_real_url_&h=_other_crap_

which would assume the &h stuff was part of the URL.

This implementation first splits the URL at ? or &, then decodes each segment, and takes the last URL found in any of those.

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