[Pkg-zope-developers] Bug#378030: zope3: any http request yields Internal Server Error

[Joris Patroons]

Package: zope3
Version: 3.2.1-4
Severity: normal
Tags: patch


After some updates this week, zope3 stopped working for me. Starting a
zope3 instance would go well, but any http access failed. The stack
trace always ended with:

  File "/usr/lib/python2.4/site-packages/zope/app/twisted/http.py", line 59, in <lambda>
    return x.addCallback(lambda data: (self.res, segments))
exceptions.AttributeError: 'Prebuffer' object has no attribute 'res'

It seems that in zope/app/twisted/http.py, the Prebuffer class overrides    
the locateChild method of WrapperResource from twisted/web2/resource.py,
and over there self.res is now called self.resource. Because the
implementation of the function is now identical in both classes, I tried
commenting out the function in Prebuffer. That got everything back to
work.

The patch is trivial:

--- /tmp/http.py.orig   2006-07-12 19:59:31.883671500 +0200
+++ /usr/lib/python2.4/site-packages/zope/app/twisted/http.py   2006-07-12 19:59:42.000000000 +0200
@@ -52,13 +52,6 @@
             
         return stream.readStream(req.stream, temp.write).addCallback(done)
 
-    # Oops, fix missing () in lambda in WrapperResource
-    def locateChild(self, ctx, segments):
-        x = self.hook(ctx)
-        if x is not None:
-            return x.addCallback(lambda data: (self.res, segments))
-        return self.res, segments
-
 def createHTTPFactory(db):
     resource = wsgi.WSGIResource(WSGIPublisherApplication(db))
     resource = log.LogWrapperResource(resource)

(The End)

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.16
Locale: LANG=en_IE at euro, LC_CTYPE=en_IE at euro (charmap=ISO-8859-15)

Versions of packages zope3 depends on:
ii  libc6                         2.3.6-15   GNU C Library: Shared libraries
ii  lsb-base                      3.1-10     Linux Standard Base 3.1 init scrip
ii  python-clientcookie           1.3.0-1    Python module for automating HTTP 
ii  python-clientform             0.2.2-2    module for handling HTML forms on 
ii  python-docutils [python2.4-do 0.4-3      Utilities for the documentation of
ii  python-mechanize              0.0.11a-3  stateful programmatic web browsing
ii  python-pullparser             0.1.0-1    simple "pull API" for HTML parsing
ii  python-twisted-conch          1:0.7.0-1  The Twisted SSH Implementation
ii  python-twisted-web2           0.2.0-1    An HTTP/1.1 Server Framework
ii  python-tz                     2006g-1    Python version of the Olson timezo
ii  python-xml                    0.8.4-5    XML tools for Python
ii  python-zopeinterface          3.2.1-4    The implementation of interface de
ii  python2.4                     2.4.3-7    An interactive high-level object-o
ii  zope-common                   0.5.24     common settings and scripts for zo

zope3 recommends no packages.

-- no debconf information