doc/bugs/attachment:_failed_to_get_filehandle.mdwn



I can't add any attachment to my wiki. When I select file using "Browse"
button and click "Upload Attachment", then ikiwiki.cgi file displays
the error message like below:
Błąd: failed to get filehandle


Can you do some debugging? If you edit attachment.pm line 136, to print
out what it did get, and show me what that yields, maybe I can figure
this out.

error("failed to get filehandle ($fh)");


Sure. I've done the change and it seems that $fh variable is undefined:


Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/IkiWiki/Plugin/attachment.pm line 135.
failed to get filehandle ()


Also, what web server and version of perl is this? --[[Joey]]


It's Apache2 2.2.8-1ubuntu0.3 and Perl 5.8.8-12 from Ubuntu Hardy. --[[Paweł|ptecza]]


Hmm, is your CGI.pm perhaps creating the attachment temp file, but
not providing an open filehandle to it via the upload method?
Change the debugging line to this: --[[Joey]]


error("failed to get filehandle:$fh ; file:$filename ; is ref:".ref($q->param('attachment')));


Now my Ikiwiki returns:


failed to get filehandle: ; file:sandbox/test.txt ; is ref:


Is it helpful for you? --[[Paweł|ptecza]]


Yes, this suggests that CGI.pm's upload function is not working,
but that it is returning a filehandle pointing at the attachment
using the old method. Hmm, so I'll bet you have a CGI.pm version
older than 2.47. Can you find your system's CGI.pm and grep for
"VERSION" in it to determine the version? I checked debian stable.
and its perl 5.8.8 has version 3.15, so is not affected, I think.


I have CGI.pm 3.15 too:


$ grep VERSION= /usr/share/perl/5.8.8/CGI.pm
$CGI::VERSION='3.15';


I've just checked in a fix that should work, can you test it?
diff --[[Joey]]


I've patched attachment.pm module, but the bug still occurs.
However I can see a little progress. I changed invoking error()
subroutine like you showed me before and now Ikiwiki prints


failed to get filehandle:test.txt ; file:sandbox/test.txt ; is ref:


--[[Paweł|ptecza]]


The same message I can see in the Apache log file. There is also
following warning:
Use of uninitialized value in length at /usr/share/perl5/IkiWiki/Plugin/attachment.pm line 36.


This is unrelated, I've fixed the warning message. --[[Joey]]

Is it Ikiwiki bug or my attachment plugin is misconfigured? --[[Paweł|ptecza]]

Joey, please fix the colon in page name of my report. [...]


Moved to [[colon:problem]] --[[Joey]]