[mod_python] Problem with .psp_

Alec Matusis matusis at yahoo.com
Fri Dec 21 01:04:53 EST 2007


> WSGI is the way Python is heading and way more hosting options available
for it.

Does this mean that mod_python will become unmaintained or obsolete?
Is WSGI more scalable than mod_python (when mod_python is used with worker
MPM)?


> -----Original Message-----
> From: mod_python-bounces at modpython.org [mailto:mod_python-
> bounces at modpython.org] On Behalf Of Graham Dumpleton
> Sent: Thursday, December 20, 2007 8:47 PM
> To: Charles Perreault
> Cc: mod_python
> Subject: Re: [mod_python] Problem with .psp_
> 
> On 21/12/2007, Charles Perreault <muganor at videotron.ca> wrote:
> > ~$: ls -las /home/user/public_html/
> >  8 drwx--x--x  7 user user  4096 2007-12-20 21:58 .
> > 64 drwx--x--x 71 user user 49152 2007-12-20 23:01 ..
> >  8 drwx--x--x  5 user user  4096 2007-12-16 22:04 cgi-bin
> >  0 drwxr-xr-x  2 user user     1 2007-12-16 11:24 download
> >  4 -rw-r--r--  1 user user  1150 2007-11-06 20:45 favicon.ico
> >  4 -rw-r--r--  1 user user    66 2007-12-16 22:29 test.psp
> >  4 -rw-r--r--  1 user user   401 2007-12-16 00:31 index.html
> >  4 -rw-r--r--  1 user user   106 2007-12-17 16:16 komodo.html
> >  4 -rw-r--r--  1 user user   206 2007-12-16 23:57 komodo.py
> >  4 -rw-r--r--  1 user user   134 2007-12-16 23:23 mptest.py
> >  4 drwx--x--x  5 user user    72 2007-12-17 16:24 noel
> >  8 drwx--x--x 10 user user  4096 2007-12-16 01:01 photos
> >  0 drwx------  4 user user    16 2007-11-26 21:56 upload
> >
> > Yes Apache is running as user and group 'www-data'.  I know about
> file
> > permissions and ACL a lot.  The complaint in error.log is about
> Apache
> > Multiviews, which I don't care if it doesn't work.  In fact I'm
> thinking
> > about disabling it.  You say Apache needs reading option on
> directories,
> > which from my experience is only true IF you want it to be able to
> > create a directory listing (which is a minor security issue and must
> be
> > enabled on a per-directory basis).
> 
> True, although looks like MultiViews may depend on getting directory
> listing as well and thus the error.
> 
> >  Else, indeed files need reading
> > permissions and folders only need execute.  Does mod_python .psp_
> > debugging rely on Multiview and therefore on folder reading
> permissions ???
> 
> No, doesn't require MultiViews so safe to disable that option. Can't
> see how it would make a difference though.
> 
> Can't think of anything else at the moment and don't have access to
> mod_python code to look at it.
> 
> BTW, as far as teaching a class, any reason why you didn't go for web
> stuff that works to WSGI interface rather than mod_python? WSGI is the
> way Python is heading and way more hosting options available for it.
> 
> > Charles
> >
> >
> >
> > Graham Dumpleton wrote:
> > > What do you get if you run:
> > >
> > >   ls -las /home/user/public_html/
> > >
> > > Apache complaining about directory permissions is pretty
> significant.
> > > Because Apache is running as a special user, it must have
> read/search
> > > access to that directory plus the parent user directory.
> > >
> > > It is odd though that you would get this complaint if straight .psp
> > > file is working.
> > >
> > > Graham
> > >
> > > On 21/12/2007, Charles Perreault <muganor at videotron.ca> wrote:
> > >
> > >> The Apache access/error log don't say much :
> > >>
> > >> access.log :
> > >> 127.0.0.1 - - [20/Dec/2007:21:59:48 -0500] "GET /~user/test.psp_
> > >> HTTP/1.1" 403 326 "-" "Mozilla/5.0 (X11; U; Linux i686; en-US;
> > >> rv:1.8.1.10) Gecko/20071128 Ubuntu/8.04 (hardy) Firefox/2.0.0.10"
> > >>
> > >> error.log :
> > >> [Thu Dec 20 21:59:48 2007] [error] [client 127.0.0.1]
> (13)Permission
> > >> denied: cannot read directory for multi: /home/user/public_html/
> > >>
> > >> The same lines are repeated for each access to test.psp_.
> > >>
> > >> Thank you,
> > >>
> > >> Charles
> > >>
> > >>
> > >> Graham Dumpleton wrote:
> > >>
> > >>> In the Apache access/error log, what is it saying when trying to
> > >>> access the .psp_ file?
> > >>>
> > >>> There should be an indication as to what Apache has matched the
> URL to
> > >>> in the file system. With that can tell why configuration may not
> be
> > >>> working.
> > >>>
> > >>> Graham
> > >>>
> > >>> On 21/12/2007, Charles Perreault <muganor at videotron.ca> wrote:
> > >>>
> > >>>
> > >>>>  Hello,
> > >>>>
> > >>>>  I'm teaching a class on web applications and I want my students
> to use
> > >>>> mod_python.  They'll have a couple of assignments during the
> semester, all
> > >>>> to be done in python cgi (first assignment, just to get started)
> and psp.
> > >>>> I'm now setuping Apache on our Ubuntu 7.10 server (Apache/2.2.4
> (Ubuntu)
> > >>>> mod_python/3.3.1 Python/2.5.1 Server).  All configuration have
> to be done on
> > >>>> server / virtual host config, forget the .htaccess (way to much
> trouble for
> > >>>> students).
> > >>>>
> > >>>>  My students will program their sites in their home folder
> (~/public_html).
> > >>>> I want them to be able to both use mod_python.psp and
> mod_python.publisher,
> > >>>> as I'll show them to use the both methods to create web
> applications.  So
> > >>>> far, I've easily been able to make both work in the same
> directory using the
> > >>>> following configuration (on Debian/Ubuntu httpd.conf is splitted
> in multiple
> > >>>> files, allowing to enable/disable modules easily) :
> > >>>>
> > >>>>  userdir.conf
> > >>>>  ----------------------
> > >>>>  <IfModule mod_userdir.c>
> > >>>>         UserDir public_html
> > >>>>         UserDir disabled root
> > >>>>
> > >>>>         <Directory /home/*/public_html>
> > >>>>                 AllowOverride FileInfo AuthConfig Limit
> > >>>>                 Options MultiViews Indexes SymLinksIfOwnerMatch
> > >>>> IncludesNoExec
> > >>>>
> > >>>>                 AddHandler mod_python .py .psp .psp_
> > >>>>                 PythonHandler mod_python.psp | .psp .psp_
> > >>>>                 PythonHandler mod_python.publisher | .py
> > >>>>                 PythonDebug On
> > >>>>         </Directory>
> > >>>>  </IfModule>
> > >>>>
> > >>>>  So you see I'm trying to assign .psp and .psp_ to
> mod_python.psp and .py to
> > >>>> publisher.  So http://localhost/~user/test.py and
> > >>>> http://localhost/~user/test.psp both work.  However, psp
> debugging with the
> > >>>> underscore trick (.psp_) don't work.  I get a 403 forbidden
> error when I try
> > >>>> to access http://localhost/~user/test.psp_.
> > >>>>
> > >>>>  Of course, test.psp exists.  From what I read, test.psp_ don't
> need to
> > >>>> exist because the psp handler will understand that a debug
> request was done.
> > >>>>  But it's not working.  However, if I create a symbolic link to
> test.psp :
> > >>>>
> > >>>>  ln -s test.psp test.psp_
> > >>>>
> > >>>>  the debug request works.  I get to see the generated PSP-
> produced python
> > >>>> code and psp-html source.
> > >>>>
> > >>>>  I must be missing something.  Is there an Apache configuration
> that could
> > >>>> be enabled by default that would prevent me to access .psp_
> files that don't
> > >>>> exist, before the mod_python.psp handler could do its magic ?
> > >>>>
> > >>>>  Anyone please can help ?  Thank you,
> > >>>>
> > >>>>
> > >>
> >
> >
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