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Graham Dumpleton
graham.dumpleton at gmail.com
Fri Dec 21 04:51:22 EST 2007
On 21/12/2007, Alec Matusis <matusis at yahoo.com> wrote: > > 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? One can still use mod_python as a way of hosting WSGI applications, although for Apache hosting mod_wsgi is a more purpose built solution for that. There are some things obviously that mod_python can do that mod_wsgi can't though because the point of mod_python is to allow programming against Apache interfaces and not restricted WSGI interface. I think the bigger challenge to mod_python is Python 3.0. The problem there is the change to the standard string type being unicode, with byte strings being distinct and more limited than current string type in Python 2.X. The mod_python interfaces are all going to have to be updated to cope with this change and it will probably mean that applications on top will also need to be changed. Same sort of changes will need to occur to a degree with WSGI applications as well but not as much because its interface is much more restricted in scope. What I would be concerned about is whether anyone would step forward to do the hard work on updating mod_python for Python 3.0. I know that I will not be that person as my priorities lie elsewhere these days. So, probably important for people to start thinking about and discussing what they would like to see happen with mod_python. One option may be to port the mod_python style of interface so it can work on top WSGI and thus allow existing applications, maybe with some small changes, to work on WSGI hosting solutions like mod_wsgi, or standalone Python web servers. > Is WSGI more scalable than mod_python (when mod_python is used with worker > MPM)? Technically they would make use of the same underlying features of Apache, so no real difference in that respect. In mod_wsgi there is a bit less overhead than mod_python and lower memory footprint, but considering the bottleneck is generally the web application itself or database access, the differences would generally not amount to that much difference. Graham > > -----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, > > > >>>> > > > >>>> > > > >> > > > > > > > > _______________________________________________ > > Mod_python mailing list > > Mod_python at modpython.org > > http://mailman.modpython.org/mailman/listinfo/mod_python > > _______________________________________________ > Mod_python mailing list > Mod_python at modpython.org > http://mailman.modpython.org/mailman/listinfo/mod_python >
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