I expect the following views.py file-download code to work, but am
getting an error, and would like feedback.
The function:
def item( request, item_id ):
from django.http import HttpResponse, HttpResponseNotFound
## valid-item check
if not item_id == '123':
return HttpResponseNotFound( '404 / Not Found' )
## access
path = '%s/cats.jpg' % ( settings_app.FOLDER_PATH )
f = open( path, mode='rb' )
## delivery
response = HttpResponse( f )
return response
# end def item()
The error:
mod_wsgi (pid=1196): Exception occurred processing WSGI script '/Users/
birkin/Documents/Brown_Library/djangoProjects/testbed/apache/
django.wsgi'.
Traceback (most recent call last):
File "/Developer_3rd/django_src/django/core/handlers/wsgi.py", line
243, in __call__
response = middleware_method(request, response)
File "/Developer_3rd/django_src/django/middleware/cache.py", line
93, in process_response
cache.set(cache_key, response, timeout)
File "/Developer_3rd/django_src/django/core/cache/backends/
locmem.py", line 80, in set
self._set(key, pickle.dumps(value), timeout)
File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/copy_reg.py", line 70, in _reduce_ex
raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle file objects
Background info -- what surprises me so with this is that similar code
in another project's views.py works fine:
def itemStatus( request, pid, SSL=None ):
from django.http import HttpResponse, HttpResponseForbidden
from studio_app.models import Identity, Item
if not 'REMOTE_ADDR' in request.META:
return HttpResponseForbidden( '403 / forbidden' )
if not request.META['REMOTE_ADDR'] in
studio_app_settings.FEDORA_METS_INGESTER_LEGIT_IPS:
## authentication
authentication_result = utility_code.authenticateViaHttpBasic
(request)
if type(authentication_result) == Identity:
pass # if authentication is successful, an identity-instance
will be returned
else:
auth_required_response =
utility_code.makeHttpBasicAuthRequiredResponse() # if authentication
fails, the string 'not_legit' is returned, and an 'authorization-
required' response will be returned
return auth_required_response
## access
item = Item.objects.get( fedora_id=pid )
path = '%s%s' %
( studio_app_settings.STUDIO_APP_FILE_UPLOAD_LOCATION,
item.original_file )
f = open( path, mode='rb' )
## delivery
response = HttpResponse( f )
response['Content-Disposition'] = 'attachment; filename=%s' %
item.name
return response
# end def itemStatus()
In the working code there are some differences. I have an Item model
that contains a FileField field which uploads to a specified
FileSystemStorage location. But I don't think the differences are
relevant, because I've examined the response.__dict__ for the working
code and non-working code -- before and after the updated content-
disposition -- and it looks like what is being handled by 'return
response' in both code-blocks is the same.
Thanks in advance.
-Birkin
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