[cups-devel] [UNKN] STR #4538: web interface: certain actions yield blank pages

Peter Mattern noreply at cups.org
Mon Dec 1 12:49:21 PST 2014


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[STR New]

As of 2.x some actions within CUPS' web interface yield blank pages,
apparently due to an issue that affects redirecting.

After initiating the respective action the usual steps are taken including
those pages informing that the action was conducted successfully (which is
always true, there's no real malfunction). But instead of redirecting to
pages like ./printers/<queue> there's a blank page.
Affected actions in that sense are on ./admin "Add Printer" (last step
"Default Options"), "Add Class" and changes regarding those check boxes in
section "Server Settings". As for the latter, it's the page informing about
the server restarting that precedes the blank page. All options in
drop-down "Administration" on ./classes/<class> and ./printers/<queue> are
affected, too.
Blank pages are always shown at addresses
localhost:631/admin/?OP=redirect[?<additional query string>], the
additional query strings are either &URL=/classes[/<class>] or
&URL=/printers[/<queue>] depending on action and type of object in
question.

Seen on Arch Linux x86_64 with with 2.0.1 from the distro's package as well
as compiled from the sources (cups.org) by simply running ./configure, make
and make install.
Same findings using Firefox, Chromium and QupZilla.

Attaching error_log from changing a queue's default options, LogLevel set
to debug, initial 5s break corresponding to the page telling changes were
applied successfully.

Scope as stated above not sure as I can't test on different platforms,
unfortunately.

Link: https://www.cups.org/str.php?L4538
Version: 2.0-current
Attachment: https://www.cups.org/strfiles.php/3420/error_log.txt
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