Ticket #3638 (closed defect: fixed)

Opened 5 years ago

Last modified 5 years ago

malformed header from script when using showpath with trac 0.11-2 from Ubuntu Hardy (CGI)

Reported by: r.v.engelen@gmail.com Assigned to: JasonWinnebeck
Priority: normal Component: ShowPathPlugin
Severity: normal Keywords: cgi
Cc: Trac Release: 0.11

Description

After I put ShowPath.py in my projects plugins directory, I receive a 500-error containing the foolowing: 

malformed header from script. Bad header=[('START', (QName(u'a'), Attrs: trac.cgi

Attachments

Change History

09/02/08 16:10:49 changed by JasonWinnebeck

  • status changed from new to assigned.

I'm not familiar with the CGI form for Trac, so I'm not sure what that error means or what would cause it. Is there an error printed out to the Trac log? I searched quickly on that error and it means the CGI script died before sending the HTTP header. I'm not sure what can cause that in Trac -- if it can happen because of an exception while processing. If so, it ought to be in Trac's log or your webserver's log.

10/11/08 03:17:39 changed by anonymous

I'm running Trac with Apache 2.2 + mod_wsgi (python 2.5, Trac 0.11stable-r7581 ). If I acitvate ShowPathPlugin my Apache Error Log is flooded with this messages: 

[Sat Oct 11 01:40:33 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'NewBie', (None, -1, -1))]
[Sat Oct 11 01:43:12 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 01:46:06 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 01:46:17 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 01:46:49 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'Press.de', (None, -1, -1))]
[Sat Oct 11 01:47:32 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/packages')])), (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'avm-firewall-cgi', (None, -1, -1))]
[Sat Oct 11 01:48:03 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help')])), (None, -1, -1)), ('TEXT', u'help', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos')])), (None, -1, -1)), ('TEXT', u'howtos', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos/common')])), (None, -1, -1)), ('TEXT', u'common', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'install', (None, -1, -1))]
[Sat Oct 11 01:50:46 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 01:50:52 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 01:51:34 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'FAQ.de', (None, -1, -1))]
[Sat Oct 11 01:52:12 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/packages')])), (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/packages/callmonitor')])), (None, -1, -1)), ('TEXT', u'callmonitor', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'listeners', (None, -1, -1))]
[Sat Oct 11 01:52:45 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'Download.de', (None, -1, -1))]
[Sat Oct 11 01:53:27 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'InterWiki', (None, -1, -1))]
[Sat Oct 11 01:54:04 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'Press.en', (None, -1, -1))]
[Sat Oct 11 01:58:45 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 01:59:18 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'TracGuide', (None, -1, -1))]
[Sat Oct 11 01:59:32 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'TracInstall', (None, -1, -1))]
[Sat Oct 11 02:00:04 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'TracIni', (None, -1, -1))]
[Sat Oct 11 02:02:12 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/packages')])), (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'usb-root', (None, -1, -1))]
[Sat Oct 11 02:02:52 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'Download.de', (None, -1, -1))]
[Sat Oct 11 02:03:22 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 02:03:30 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'Download.de', (None, -1, -1))]
[Sat Oct 11 02:03:46 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help')])), (None, -1, -1)), ('TEXT', u'help', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos')])), (None, -1, -1)), ('TEXT', u'howtos', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos/common')])), (None, -1, -1)), ('TEXT', u'common', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'install', (None, -1, -1))]
[Sat Oct 11 02:06:32 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 02:06:58 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 02:11:33 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1))]
[Sat Oct 11 02:11:41 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/packages')])), (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'mediaserver', (None, -1, -1))]
[Sat Oct 11 02:12:04 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1))]
[Sat Oct 11 02:12:12 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/packages')])), (None, -1, -1)), ('TEXT', u'packages', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'bridge-utils', (None, -1, -1))]
[Sat Oct 11 02:12:54 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help')])), (None, -1, -1)), ('TEXT', u'help', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos')])), (None, -1, -1)), ('TEXT', u'howtos', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos/common')])), (None, -1, -1)), ('TEXT', u'common', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'install', (None, -1, -1))]
[Sat Oct 11 02:15:06 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help')])), (None, -1, -1)), ('TEXT', u'help', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos')])), (None, -1, -1)), ('TEXT', u'howtos', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/help/howtos/development')])), (None, -1, -1)), ('TEXT', u'development', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'freetz_make', (None, -1, -1))]
[Sat Oct 11 02:24:51 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 02:36:48 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 02:40:38 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'WikiStart.de', (None, -1, -1))]
[Sat Oct 11 02:42:21 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', u'TracBrowser', (None, -1, -1))]
[Sat Oct 11 02:52:56 2008] [error] [('START', (QName(u'a'), Attrs([(QName(u'href'), u'/wiki/WikiStart')])), (None, -1, -1)), ('TEXT', 'Start Page', (None, -1, -1)), ('END', QName(u'a'), (None, -1, -1)), ('TEXT', u' / ', (None, -1, -1)), ('TEXT', 'WikiStart.de', (None, -1, -1))]

No errors can be found in trac log.

10/13/08 14:42:13 changed by JasonWinnebeck

  • keywords set to cgi.
  • summary changed from malformed header from script when using showpath with trac 0.11-2 from Ubuntu Hardy to malformed header from script when using showpath with trac 0.11-2 from Ubuntu Hardy (CGI).

OK, at first, I was getting confused because I didn't know what these error messages were. I also was thrown off that it wasn't working -- I assume so at least because it says it gets a 500 error.

I actually left in a debugging print that printed out the content of the context navigation that is output by the plugin. This doesn't affect running in Trac standalone (tracd) or in Apache with mod_python. I could see how it would affect CGI, since if I recall correctly, the output from the process is what is returned to the browser, so I can understand the error.

10/13/08 14:44:29 changed by JasonWinnebeck

  • status changed from assigned to closed.
  • resolution set to fixed.

(In [4474]) Removed debugging print, which seems to be crashing Trac when run under CGI. I'm 90% sure that this closes #3638

10/13/08 22:29:30 changed by anonymous

For me the errors have gone.

Thank you for your quick response.

Add/Change #3638 (malformed header from script when using showpath with trac 0.11-2 from Ubuntu Hardy (CGI))




Change Properties
Action