On Apr 7, 9:40 am, Alexey Vlasov <ren...@renton.name> wrote:
> Hi.
>
> There's a simple code in urls.py:
> ==============
> def ls (request):
> import os
>
> out_html = ''
> home_path = '/home/www/test-django'
> # subdir_path = request.GET.get ('subdir')
> subdir_path = 'public_html'
>
> for root, dirs, files in os.walk (os.path.join (home_path, subdir_path)):
> out_html += "%s<br/>\n" % root
>
> return HttpResponse (out_html)
> ==============
>
> There's a catalogue in "home_path/subdir_path" which name
> includes cyrillic symbols ( ):
> $ pwd
> /home/www/test-django/public_html
> $ ls -la
> drwx---r-x 4 test-django test-django 111 Apr 6 20:26 .
> drwx--x--- 13 test-django test-django 4096 Apr 6 20:26 ..
> -rw-r--r-- 1 test-django test-django 201 Apr 6 17:43 .htaccess
> -rwxr-xr-x 1 test-django test-django 911 Apr 6 16:38 index.fcgi
> lrwxrwxrwx 1 test-django test-django 66 Mar 28 17:34 media -> ../
> python/lib64/python2.5/site-packages/django/contrib/admin/media
> drwxr-xr-x 2 test-django test-django 6 Apr 6 15:48
>
> My code works correct, here's the result:
> $ curl -shttp://test-django.example.com/ls/
> /home/www/test-django/public_html <br/>
> /home/www/test-django/public_html/ <br/>
>
> But if I change "subdir_path = 'public_html'" to
> "subdir_path = request.GET.get ('subdir')" then the request:
> $ curl -shttp://test-django.example.com/ls/\?subdir=public_html
> leads to an error:
>
> Request Method: GET
> Request URL: http:// test-django.example.com/ls/
> Django Version: 1.0.2 final
> Python Version: 2.5.2
> Installed Applications:
> ['django.contrib.auth',
> 'django.contrib.contenttypes',
> 'django.contrib.sessions',
> 'django.contrib.sites']
> Installed Middleware:
> ('django.middleware.common.CommonMiddleware',
> 'django.contrib.sessions.middleware.SessionMiddleware',
> 'django.contrib.auth.middleware.AuthenticationMiddleware')
>
> Traceback:
> File "/home/www/test-django/python/lib64/python2.5/
> site-packages/django/core/handlers/base.py" in get_response
> 86. response = callback(request, *callback_args,
> **callback_kwargs)
> File "/home/www/test-django/django/demo/urls.py" in ls
> 40. for root, dirs, files in os.walk (os.path.join (home_path,
> subdir_path)):
> File "/usr/lib64/python2.5/os.py" in walk
> 293. if isdir(join(top, name)):
> File "/usr/lib64/python2.5/posixpath.py" in isdir
> 195. st = os.stat(path)
>
> Exception Type: UnicodeEncodeError at /ls/
> Exception Value: 'ascii' codec can't encode characters in position
> 45-48: ordinal not in range(128)
>
> I don't understand it why "subdir_path" getting the same very value in one
> case works perfectly and in the
> +other fails.
>
> Django runs following the instuctions
> +http://docs.djangoproject.com/en/dev/howto/deployment/fastcgi/#runnin...
> +h-apache
>
> --
> BRGDS. Alexey Vlasov.
I think I know the reason for the difference in hard-coding the string
vs getting it from request.GET.
Django always uses unicode strings internally, and this includes GET
parameters. So your 'public_html' string is actually being converted
to u'public_html', as you can see if you print the contents of
request.GET. But your hard-coded string is a bytestring. If you used
the unicode version - subdir_path = u'public_html' - you would see
the same result as with the GET version.
As to why this is causing a problem when combined with os.walk and
os.path.join, this is because of the rather strange behaviour of the
functions in the os module. If you pass a unicode path parameter to
them, they return results in unicode. But if you pass a bytestring
parameter, the results are bytestrings. And since you have not
declared a particular encoding, Python assumes it is ascii - and of
course your Cyrillic filenames are not valid in ASCII.
The problem should go away if you are careful to define *all* your
strings as unicode - it is the mixture of unicode and bytestrings that
is causing the problem. This means:
out_html = u''
home_path = u'/home/www/test-django'
...
out_html += u"%s<br/>\n" % root
--
DR
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