Red Hat Bugzilla – Bug 485334
mod_wsgi discards POST values in some situations
Last modified: 2013-01-10 05:30:28 EST
Created attachment 331775 [details]
Backport of the continue fix to 2.3
Description of problem:
When using curl/libcurl/pycurl (or Opera) with an application running under mod_wsgi and the POST parameters are large enough (1024 bytes for curl), the client will use an "Expect: continue-100" header to tell the server to acknowledge the request and request the rest of the information before proceeding. Unfortunately, mod_wsgi-2.0-mod_wsgi-2.3 have a bug that causes problems with that header. The application server sitting behind mod_wsgi never gets the header and so tries to process the request immediately instead of asking for the rest of the data.
This leads to form variables never being seen by the server.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start a server under mod_wsgi. For instance bodhi
2. attempt to contact it using pycurl and a large amount of POST data For instance, https://admin.fedoraproject.org/updates/admin/mash with a large number of updates.
Server will receive the request without any POST data
Server will receive the request with full POST data.
This affects both the Fedora and EPEL mod_wsgi.
There is a patch in the mod_wsgi-2.x branch upstream that will be out in mod_wsgi-2.4. Details here: http://code.google.com/p/modwsgi/issues/detail?id=121
Attaching a backport of the patch to mod_wsgi-2.3.
Created attachment 331780 [details]
Backport of fix to mod_wsgi-2.1 for EL-5
And a backport of the fix to 2.1 for the EPEL branch.
mod_wsgi-2.1 with the EL-5 backport has been running successfully in fedora infrastructure for two weeks.
This message is a reminder that Fedora 10 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 10. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as WONTFIX if it remains open with a Fedora
'version' of '10'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version prior to Fedora 10's end of life.
Bug Reporter: Thank you for reporting this issue and we are sorry that
we may not be able to fix it before Fedora 10 is end of life. If you
would still like to see this bug fixed and are able to reproduce it
against a later version of Fedora please change the 'version' of this
bug to the applicable version. If you are unable to change the version,
please add a comment here and someone will do it for you.
Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.
The process we are following is described here:
Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version.
Thank you for reporting this bug and we are sorry it could not be fixed.