def ingest_form(request):
"""Display or process the file ingest form. On GET, display the form. On
valid POST, reposit the submitted file in a new digital object.
"""
if request.method == 'POST':
form = IngestForm(request.POST, request.FILES)
if form.is_valid():
# TODO: set label/dc:title based on filename;
# set file mimetype in dc:format
# TODO: file checksum?
repo = Repository(request=request)
fobj = repo.get_object(type=FileObject)
st = (fobj.uriref, relsext.isMemberOfCollection,
URIRef(form.cleaned_data['collection']))
fobj.rels_ext.content.add(st)
fobj.master.content = request.FILES['file']
# pre-populate the object label and dc:title with the uploaded filename
fobj.label = fobj.dc.content.title = request.FILES['file'].name
fobj.save('ingesting user content')
messages.success(request, 'Successfully ingested <a href="%s"><b>%s</b></a>' % \
(reverse('file:view', args=[fobj.pid]), fobj.pid))
return HttpResponseSeeOtherRedirect(reverse('site-index'))
else:
initial_data = {}
# if collection is specified in url parameters, pre-select the
# requested collection on the form via initial data
if 'collection' in request.GET:
initial_data['collection'] = request.GET['collection']
form = IngestForm(initial=initial_data)
return render_to_response('file/ingest.html', {'form': form},
request=request)
def browse(request):
"Browse postcards and display thumbnail images."
repo = Repository()
repo.default_object_type = ImageObject
# TEMPORARY: restrict to postcards by pidspace
# NOTE: tests rely somewhat on restriction by pidspace...
search_opts = {'relation': settings.RELATION }
number_of_results = 15
context = {}
if 'subject' in request.GET:
context['subject'] = request.GET['subject']
search_opts['subject'] = request.GET['subject']
postcards = repo.find_objects(**search_opts)
postcard_paginator = Paginator(list(postcards), number_of_results)
try:
page = int(request.GET.get('page', '1'))
except ValueError:
page = 1
# If page request (9999) is out of range, deliver last page of results.
try:
postcard_page = postcard_paginator.page(page)
except (EmptyPage, InvalidPage):
postcard_page = postcard_paginator.page(paginator.num_pages)
context['postcards_paginated'] = postcard_page
return render_to_response('postcards/browse.html', context,
context_instance=RequestContext(request))
def _load_postcard(self, label, description, subjects, filename):
'''Create a postcard object and load to fedora.
:param label: object label and dc:title
:param description: object dc:description
:param subjects: list of subjects to be set in dc:subject
:param filename: filename for image content, assumed relative to current directory
'''
# NOTE: image object init here somewhat redundant with current postcard ingest logic
repo = Repository()
obj = repo.get_object(type=ImageObject)
obj.label = label
obj.owner = settings.FEDORA_OBJECT_OWNERID
obj.dc.content.title = obj.label
obj.dc.content.description_list.extend(description)
obj.dc.content.subject_list.extend(subjects)
# common DC for all postcards
obj.dc.content.type = 'image'
# FIXME: configure this somewhere?
obj.dc.content.relation_list.extend([settings.RELATION,
'http://beck.library.emory.edu/greatwar/'])
# set file as content of image datastream
obj.image.content = open(path.join(fixture_path, filename))
# add relation to postcard collection
obj.rels_ext.content.add((
URIRef(obj.uri),
URIRef(MEMBER_OF_COLLECTION),
URIRef(PostcardCollection.get().uri)
))
obj.save()
self.postcards.append(obj)
def view_metadata(request, pid):
repo = Repository(request=request)
obj = repo.get_object(pid, type=FileObject)
# if the object doesn't exist or user doesn't have sufficient
# permissions to know that it exists, 404
if not obj.exists:
raise Http404
return render_to_response('file/view.html', {'obj': obj}, request=request)
def edit_metadata(request, pid):
"""View to edit the metadata for an existing
:class:`~genrepo.file.models.FileObject` .
On GET, display the form. When valid form data is POSTed, updates
thes object.
"""
status_code = None
repo = Repository(request=request)
# get the object (if pid is not None), or create a new instance
obj = repo.get_object(pid, type=FileObject)
# on GET, instantiate the form with existing object data (if any)
if request.method == 'GET':
form = DublinCoreEditForm(instance=obj.dc.content)
# on POST, create a new collection object, update DC from form
# data (if valid), and save
elif request.method == 'POST':
form = DublinCoreEditForm(request.POST, instance=obj.dc.content)
if form.is_valid():
form.update_instance()
# also use dc:title as object label
obj.label = obj.dc.content.title
try:
result = obj.save('updated metadata')
messages.success(request,
'Successfully updated <a href="%s"><b>%s</b></a>' % \
(reverse('file:view', args=[obj.pid]), obj.pid))
# maybe redirect to file view page when we have one
return HttpResponseSeeOtherRedirect(reverse('site-index'))
except (DigitalObjectSaveFailure, RequestFailed) as rf:
# do we need a different error message for DigitalObjectSaveFailure?
if isinstance(rf, PermissionDenied):
msg = 'You don\'t have permission to modify this object in the repository.'
else:
msg = 'There was an error communicating with the repository.'
messages.error(request,
msg + ' Please contact a site administrator.')
# pass the fedora error code back in the http response
status_code = getattr(rf, 'code', None)
# if form is not valid, fall through and re-render the form with errors
response = render_to_response('file/edit.html', {
'form': form,
'obj': obj
},
request=request)
# if a non-standard status code is set, set it in the response before returning
if status_code is not None:
response.status_code = status_code
return response
def setUp(self):
# load test object to test views with
repo = Repository()
self.obj = repo.get_object(type=SimpleDigitalObject)
self.obj.dc.content.title = 'test object for generic views'
self.obj.text.content = 'sample plain-text content'
img_file = path.join(settings.FEDORA_FIXTURES_DIR, 'test.png')
self.obj.image.content = open(img_file)
# force datastream checksums so we can test response headers
for ds in [self.obj.dc, self.obj.rels_ext, self.obj.text, self.obj.image]:
ds.checksum_type = 'MD5'
self.obj.save()
def view_postcard_large(request, pid):
'''View a large image of postcard with title only.'''
repo = Repository()
try:
obj = repo.get_object(pid, type=ImageObject)
obj.label # access object label to trigger 404 before we get to the template
return render_to_response('postcards/view_postcard_large.html',
{'card' : obj },
context_instance=RequestContext(request))
except RequestFailed:
raise Http404
def search(request):
# rough fedora-based postcard search (borrowed heavily from digital masters)
form = SearchForm(request.GET)
response_code = None
context = {'search': form}
number_of_results = 5
if form.is_valid():
# adding wildcards because fedora has a weird notion of what 'contains' means
# TODO: terms search can't be used with with field search
# -- how to allow a keyword search but restrict to postcards?
#keywords = '%s*' % form.cleaned_data['keyword'].rstrip('*')
# TEMPORARY: restrict to postcards by pidspace
search_opts = {'relation': settings.RELATION }
if 'title' in form.cleaned_data:
search_opts['title__contains'] = '%s*' % form.cleaned_data['title'].rstrip('*')
if 'description' in form.cleaned_data:
search_opts['description__contains'] = '%s*' % form.cleaned_data['description'].rstrip('*')
try:
repo = Repository()
found = repo.find_objects(type=ImageObject, **search_opts)
search_paginator = Paginator(list(found), number_of_results)
try:
page = int(request.GET.get('page', '1'))
except ValueError:
page = 1
# If page request (9999) is out of range, deliver last page of results.
try:
search_page = search_paginator.page(page)
except (EmptyPage, InvalidPage):
search_page = search_paginator.page(paginator.num_pages)
context['postcards_paginated'] = search_page
context['title'] = form.cleaned_data['title']
context['description'] = form.cleaned_data['description']
except Exception as e:
logging.debug(e)
response_code = 500
context['server_error'] = 'There was an error ' + \
'contacting the digital repository. This ' + \
'prevented us from completing your search. If ' + \
'this problem persists, please alert the ' + \
'repository administrator.'
response = render_to_response('postcards/search.html', context,
context_instance=RequestContext(request))
if response_code is not None:
response.status_code = response_code
return response
def view_collection(request, pid):
'''view an existing
:class:`~genrepo.collection.models.CollectionObject` identified by
pid.
'''
repo = Repository(request=request)
obj = repo.get_object(pid, type=CollectionObject)
# if the object does not exist or the current user doesn't have
# permission to see that it exists, 404
if not obj.exists:
raise Http404
return render_to_response('collection/view.html', {'obj': obj},
request=request)
def remove_test_objects():
# remove any leftover test object before or after running tests
# NOTE: This method expects to be called only when FEDORA_PIDSPACE has been
# switched to a test pidspace
# use test fedora credentials if they are set
repo = Repository(username=getattr(settings, 'FEDORA_TEST_USER', None),
password=getattr(settings, 'FEDORA_TEST_PASSWORD', None))
test_objects = repo.find_objects(pid__contains='%s:*' % settings.FEDORA_PIDSPACE)
count = 0
for obj in test_objects:
# if objects are unexpectedly not being cleaned up, pid/label may help
# to isolate which test is creating the leftover objects
logger.info('Purging test object %s - %s' % (obj.pid, obj.label))
repo.purge_object(obj.pid, "removing test object")
count += 1
if count:
print "Removed %s test object(s) with pidspace %s" % (count, settings.FEDORA_PIDSPACE)
def summary(request):
'''Postcard summary/about page with information about the postcards and
various entry points for accessing them.'''
# get a list of all the postcards by searching in fedora
# - used to get total count, and to display a random postcard
# NOTE: this may be inefficient when all postcards are loaded; consider caching
repo = Repository()
search_opts = {'relation': settings.RELATION }
postcards = list(repo.find_objects(**search_opts))
count = len(postcards)
# TODO: get categories from fedora collection object
categories = PostcardCollection.get().interp.content.interp_groups
return render_to_response('postcards/index.html', {
'categories' : categories,
'count' : count,
'postcards': postcards,
},
context_instance=RequestContext(request))
def postcard_image(request, pid, size):
'''Serve out postcard image in requested size.
:param pid: postcard object pid
:param size: size to return, one of thumbnail, medium, or large
'''
try:
repo = Repository()
obj = repo.get_object(pid, type=ImageObject)
if size == 'thumbnail':
image = obj.thumbnail()
elif size == 'medium':
image = obj.medium_image()
elif size == 'large':
image = obj.large_image()
return HttpResponse(image, mimetype='image/jpeg')
except RequestFailed as fail:
raise Http404
def download_file(request, pid):
'''Download the master file datastream associated with a
:class:`~genrepo.file.models.FileObject`'''
repo = Repository(request=request)
# FIXME: what should the default download filename be?
extra_headers = {'Content-Disposition': "attachment; filename=%s" % (pid)}
# use generic raw datastream view from eulcore
return raw_datastream(request,
pid,
FileObject.master.id,
type=FileObject,
repo=repo,
headers=extra_headers)
def view_postcard(request, pid):
'''View a single postcard at actual postcard size, with description.'''
repo = Repository()
try:
obj = repo.get_object(pid, type=ImageObject)
obj.label # access object label to trigger 404 before we get to the template
#get ark from object
ark = filter(lambda ident: 'ark' in ident, obj.dc.content.identifier_list)
if len(ark) > 0:
ark = ark[0]
else:
ark = ''
# #get description from description elements
description = filter(lambda desc: desc.startswith(settings.POSTCARD_DESCRIPTION_LABEL), obj.dc.content.description_list)
if len(description) > 0:
description = description[0]
description = description[len(settings.POSTCARD_DESCRIPTION_LABEL):] #trim off label used to identify description
else:
description = ''
#get postcard text from description elements
postcard_text = filter(lambda desc: desc.startswith(settings.POSTCARD_FLOATINGTEXT_LABEL), obj.dc.content.description_list)
if len(postcard_text) > 0:
postcard_text = postcard_text[0]
postcard_text = postcard_text[len(settings.POSTCARD_FLOATINGTEXT_LABEL):] #trim off label used to identify postcard text
else:
postcard_text = ''
return render_to_response('postcards/view_postcard.html',
{'card' : obj, 'ark' : ark, 'description' : description, 'postcard_text' : postcard_text },
context_instance=RequestContext(request))
except RequestFailed:
raise Http404
def handle(self, cards_fname, image_dir, dry_run=False, **options):
verbosity = int(options['verbosity']) # 1 = normal, 0 = minimal, 2 = all
v_normal = 1
#populate usr and pass
repo_args = {}
if options.get('username') is not None:
repo_args['username'] = options.get('username')
if options.get('password') is not None:
repo_args['password'] = options.get('password')
repo = Repository(**repo_args)
collection = PostcardCollection.get()
if not collection.exists:
raise Exception(collection.pid + " is not in the repository. Do you need to syncrepo?")
def anas_simple(my_dict,a):
for ana in my_dict:
if ana in a:
return my_dict[ana]
# def anas_complex(a,b):
# for ana in ana_lcc:
# if ana not in a:
# return FALSE
# if ana in b:
# return ana_lcc[ana]
#dictionary of lc subjects, simple (using 1 ana id) and complex (using 2 ana ids).
ana_lcs = {"nat-it":"World War, 1914-1918--Italy",
"nat-fr":"World War, 1914-1918--France",
"nat-us":"World War, 1914-1918--United States",
"nat-de":"World War, 1914-1918--Germany",
"nat-brit":"World War, 1914-1918--Great Britain",
"nat-bel":"World War, 1914-1918--Belgium",
"nat-au":"World War, 1914-1918--Austria",
"nat-nl":"World War, 1914-1918--Netherlands",
"nat-rus":"World War, 1914-1918--Russia",
"nat-jp":" World War, 1914-1918--Japan",
"nat-ee":"World War, 1914-1918--Eastern Europe",
"nat-ca":"World War, 1914-1918--Canada",
"nat-hu":"World War, 1914-1918--Hungary",
"mil-nur":"Military Nursing",
"con-h":"World War, 1914-1918--Humor",
"con-v":"World War, 1914-1918--Poetry",
"con-p":"World War, 1914-1918--Persons",
"con-m":"World War, 1914-1918--Memorials",
"con-r":"World War, 1914-1918--Destruction and pillage",
"con-f":"Flags in art",
"con-el":"Uncle Elmer",
"hf-p":"World War, 1914-1918--Propaganda",
"hf-c":"World War, 1914-1918--Children",
"hf-w":"World War, 1914-1918--Women",
"hf-re":"World War, 1914-1918--Religious aspects",
"hf-ro":"World War, 1914-1918--Man-Woman relationships",
}
ana_lcc_army = {"nat-fr":u"France. Arm\xe9e",
"nat-brit":"Great Britain. Army",
"nat-bel":u"Belgium. Arm\xe9e",
"nat-de":"Germany. Heer",
"nat-us":"United States. Army",
"nat-ca":"Canada. Canadian Army",
"nat-jp":"Japan. Rikugun",
"nat-au":u"Austria. Arm\xe9e",
}
ana_lcc_navy = {"nat-brit":"Royal Navy. Great Britain",
"nat-us":"United States. Navy",
"nat-fr":"France. Marine",
"nat-de":"Germany. Kriegsmarine",
"nat-ca":"Canada. Royal Canadian Navy",
}
#images use dc:type
ana_lcimage = {"im-ph":"photograph",
"im-pa":"painting",
"im-dr":"drawing",
"im-ca":"cartoon",
"im-en":"engraving",
"im-po":"poster",
"im-s":"silk postcard",
}
#use dc:coverage
ana_lccoverage = {"t-wwi":"1914-1918",
"t-pre":"Before 1914",
"t-post":"After 1918",
"t-ww2":"1939-1945",
"t-post2":"After 1945",
}
# make a dictionary of subjects so type and value is easily accessible by id
interps = collection.interp.content.interp_groups
subjects = {}
for group in interps:
for interp in group.interp:
subjects[interp.id] = (group.type, interp.value)
cards_tei = load_xmlobject_from_file(cards_fname, xmlclass=Tei)
cards = cards_tei.body.all_figures
files = 0
ingested = 0
for c in cards:
file = os.path.join(image_dir, '%s.tif' % c.entity)
if os.access(file, os.F_OK):
if verbosity >= v_normal:
print "Found master file %s for %s" % (file, c.entity)
else:
file = os.path.join(image_dir, 'wwi_%s.tif' % c.entity)
if os.access(file, os.F_OK):
if verbosity >= v_normal:
print "Found master file %s for %s" % (file, c.entity)
else:
if verbosity >= v_normal:
print "File not found for %s" % c.entity
continue
files += 1
obj = repo.get_object(type=ImageObject)
obj.dc.content.identifier_list.append(c.entity) # Store local identifiers in DC
obj.label = c.head
obj.owner = settings.FEDORA_OBJECT_OWNERID
obj.dc.content.title = obj.label
#append label so postcard description can be identified in the description elements
obj.dc.content.description_list.append('%s%s' % (settings.POSTCARD_DESCRIPTION_LABEL, c.description))
#Add floating text from postcards (text written on the card)
float_lines = [] # list of lines of text from the postcard
f_text = c.floatingText
if len(f_text) > 0:
f_text = f_text[0]
if f_text.head:
float_lines.append(f_text.head)
if len(f_text.line_group) > 0:
for group in f_text.line_group:
if group.head is not None: #treat head as normal line
float_lines.append(group.head)
for line in group.line: #add the rest of the lines
float_lines.append(line)
float_lines.append('\n') #each linegroup needs an extra \n at the end to make a paragraph
elif len(f_text.line) > 0:
for line in f_text.line:
float_lines.append(line)
float_lines = map(unicode, float_lines) #convert all lines to unicode
float_lines = str.join("\n", float_lines) #Add \n for each line break and convert to a str
#append label so floating text (postcard text) can be identified in the description elements
obj.dc.content.description_list.append('%s%s' % (settings.POSTCARD_FLOATINGTEXT_LABEL, float_lines))
# convert interp text into dc: subjects
local_subjects = []
for ana_id in c.ana.split():
# ana_id = c.ana.split()
if ana_id in subjects:
local_subjects.append('%s: %s' % subjects[ana_id])
else:
print 'ana id %s not recognized for %s' % (ana_id, c.entity)
obj.dc.content.subject_list.extend(local_subjects)
lc_subjects = []
ana_ids = []
ana_ids = c.ana.split()
if verbosity > v_normal:
print 'DEBUG: %s are the ana ids for %s' % (ana_ids, c.entity)
for ana_id in ana_ids:
if ana_id in ana_lcc_army:
for ana_id2 in ana_ids:
if ana_id2 == "mil-a":
ana_lc = ana_lcc_army[ana_id]
lc_subjects.append('%s' % ana_lc)
print '%s added to LC subjects list-army or navy' % ana_lc
if ana_id in ana_lcc_navy:
for ana_id2 in ana_ids:
if ana_id2 == "mil-na":
ana_lc = ana_lcc_navy[ana_id]
lc_subjects.append('%s' % ana_lc)
print '%s added to LC subjects list-army or navy' % ana_lc
if ana_id in ana_lcs:
ana_lc = anas_simple(ana_lcs, ana_id)
lc_subjects.append('%s' % ana_lc)
print '%s added to LC subjects list-nat, mil-nur, con, hf' % (ana_lc)
# else:
# print 'ana id %s not recognized for %s' % (ana_id, c.entity)
obj.dc.content.subject_list.extend(lc_subjects)
for ana_id in ana_ids:
my_dict = ana_lcimage
if ana_id in my_dict:
# print 'DEBUG %s found in image list' % ana_id
ana_image = anas_simple(my_dict, ana_id)
# print 'DEBUG %s is the value for %s' % (ana_image, ana_id)
lc_subjects.append('%s' % ana_image)
print '%s added to LC subjects list-image type' % (ana_image)
# else:
# print 'ana id %s not recognized for %s' % (ana_id, c.entity)
obj.dc.content.type_list.extend(lc_subjects)
for ana_id in ana_ids:
my_dict = ana_lccoverage
if ana_id in my_dict:
ana_cover = anas_simple(my_dict,ana_id)
lc_subjects.append('%s' % ana_cover)
print '%s added to LC subjects list-coverage' % ana_cover
# else:
# print 'ana id %s not recognized for %s' % (ana_id, c.entity)
obj.dc.content.coverage_list.extend(lc_subjects)
# common DC for all postcards
obj.dc.content.type = 'image'
obj.dc.content.type = 'postcard'
obj.dc.content.relation_list.extend([settings.RELATION,
'http://beck.library.emory.edu/greatwar/'])
# set file as content of image datastream
obj.image.content = open(file)
# add relation to postcard collection
obj.rels_ext.content.add((
URIRef(obj.uri),
URIRef(MEMBER_OF_COLLECTION),
URIRef(PostcardCollection.get().uri)
))
# TODO: OAI identifier ?
if verbosity > v_normal:
print "Dublin Core\t\n", obj.dc.content.serialize(pretty=True)
print "RELS-EXT \t\n", obj.rels_ext.content.serialize(pretty=True)
if not dry_run:
obj.save()
print "ingested %s as %s" % (unicode(c.head).encode('latin-1'), obj.pid)
ingested += 1
# summarize what was done
print "Found %d postcards " % len(cards)
print "Found %d postcard files " % files
print "Ingested %d postcards " % ingested
def _create_or_edit_collection(request, pid=None):
"""View to create a new
:class:`~genrepo.collection.models.CollectionObject` or update an
existing one.
On GET, display the form. When valid form data is POSTed, creates
a new collection (if pid is None) or updates an existing
collection.
"""
status_code = None
repo = Repository(request=request)
# get the object (if pid is not None), or create a new instance
obj = repo.get_object(pid, type=CollectionObject)
# on GET, instantiate the form with existing object data (if any)
if request.method == 'GET':
form = CollectionDCEditForm(instance=obj.dc.content)
# on POST, create a new collection object, update DC from form
# data (if valid), and save
elif request.method == 'POST':
form = CollectionDCEditForm(request.POST, instance=obj.dc.content)
if form.is_valid():
form.update_instance()
# also use dc:title as object label
obj.label = obj.dc.content.title
try:
if obj.exists:
action = 'updated'
save_msg = 'updated via genrepo'
else:
action = 'created new'
save_msg = 'ingested via genrepo'
# save message must be specified in order for Fedora
# to generate & store an ingest audit trail event
result = obj.save(save_msg)
messages.success(request,
'Successfully %s collection <a href="%s"><b>%s</b></a>' % \
(action, reverse('collection:edit', args=[obj.pid]), obj.pid))
# maybe redirect to collection view page when we have one
# - and maybe return a 201 Created status code
return HttpResponseSeeOtherRedirect(reverse('site-index'))
except (DigitalObjectSaveFailure, RequestFailed) as rf:
# do we need a different error message for DigitalObjectSaveFailure?
if isinstance(rf, PermissionDenied):
msg = 'You don\'t have permission to create a collection in the repository.'
else:
msg = 'There was an error communicating with the repository.'
messages.error(request,
msg + ' Please contact a site administrator.')
# pass the fedora error code back in the http response
status_code = getattr(rf, 'code', None)
# if form is not valid, fall through and re-render the form with errors
response = render_to_response('collection/edit.html', {
'form': form,
'obj': obj
},
request=request)
# if a non-standard status code is set, set it in the response before returning
if status_code is not None:
response.status_code = status_code
return response
def raw_datastream(request, pid, dsid, type=None, repo=None, headers={}):
'''View to display a raw datastream that belongs to a Fedora Object.
Returns an :class:`~django.http.HttpResponse` with the response content
populated with the content of the datastream. The following HTTP headers
may be included in all the responses:
- Content-Type: mimetype of the datastream in Fedora
- ETag: datastream checksum, as long as the checksum type is not 'DISABLED'
The following HTTP headers may be included `only` for non-xml and non-RDF
datastreams (excluded there since they may be inaccurate depending on the
serialization of the content):
- Content-MD5: MD5 checksum of the datastream in Fedora, if available
- Content-Length: size of the datastream in Fedora
If either the datastream or object are not found, raises an
:class:`~django.http.Http404` . For any other errors (e.g., permission
denied by Fedora), the exception is re-raised and should be handled elsewhere.
:param request: HttpRequest
:param pid: Fedora object PID
:param dsid: datastream ID to be returned
:param type: custom object type (should extend
:class:`~eulcore.fedora.models.DigitalObject`) (optional)
:param repo: :class:`~eulcore.django.fedora.server.Repository` instance to use,
in case your application requires custom repository initialization (optional)
:param headers: dictionary of additional headers to include in the response
'''
if repo is None:
repo = Repository()
get_obj_opts = {}
if type is not None:
get_obj_opts['type'] = type
obj = repo.get_object(pid, **get_obj_opts)
try:
# NOTE: we could test that pid is actually the requested
# obj.has_requisite_content_models but that would mean
# an extra API call for every datastream but RELS-EXT
# Leaving out for now, for efficiency
ds = obj.getDatastreamObject(dsid)
if ds and ds.exists:
# if the datastream content has a serialize option, use that
if hasattr(ds.content, 'serialize'):
content = ds.content.serialize(pretty=True)
# otherwise, use content directly
else:
content = ds.content
# NOTE: this will probably need some work to be able to handle large datastreams
response = HttpResponse(content, mimetype=ds.mimetype)
# if we have a checksum, use it as an ETag
if ds.checksum_type != 'DISABLED':
response['ETag'] = ds.checksum
# TODO: set last-modified header also ? may require an extra API call
# Where available & appropriate, pass along content length & MD5
# checksum in response headers.
# MD5 and size may not be accurate for XML & RDF depending on
# serialization, so leaving off in those cases.
if ds.mimetype not in ['text/xml', 'application/rdf+xml']:
if ds.checksum_type == 'MD5':
response['Content-MD5'] = ds.checksum
if ds.info.size:
response['Content-Length'] = ds.info.size
# set any user-specified headers that were passed in
for header, val in headers.iteritems():
response[header] = val
return response
else:
raise Http404
except RequestFailed as rf:
print rf
# if object is not the speficied type or if either the object
# or the requested datastream doesn't exist, 404
if rf.code == 404 or \
(type is not None and not obj.has_requisite_content_models) or \
not getattr(obj, dsid).exists or not obj.exists :
raise Http404
# for anything else, re-raise & let Django's default 500 logic handle it
raise
