def configure_database(self):
"""
Database configuration should be set here
"""
self.NS = NS
self.NS.local = rdflib.Namespace(self.config['lod_prefix'] + '/')
self.admin_db = database.engine_from_config(self.config, "admin_")
self.db = database.engine_from_config(self.config, "knowledge_")
self.db.app = self
self.vocab = ConjunctiveGraph()
#print URIRef(self.config['vocab_file'])
default_vocab = Graph(store=self.vocab.store)
default_vocab.parse(source=os.path.abspath(
os.path.join(os.path.dirname(__file__), "default_vocab.ttl")),
format="turtle",
publicID=str(self.NS.local))
custom_vocab = Graph(store=self.vocab.store)
custom_vocab.parse(self.config['vocab_file'],
format="turtle",
publicID=str(self.NS.local))
self.datastore = WhyisUserDatastore(self.admin_db, {},
self.config['lod_prefix'])
self.security = Security(self,
self.datastore,
register_form=ExtendedRegisterForm)
class App(Empty):
managed = False
def configure_extensions(self):
Empty.configure_extensions(self)
self.celery = Celery(self.name,
broker=self.config['CELERY_BROKER_URL'],
beat=True)
self.celery.conf.update(self.config)
self.celery.conf.ONCE = {
'backend': 'celery_once.backends.Redis',
'settings': {
'url': self.config['CELERY_BROKER_URL'],
'default_timeout': 60 * 60 * 24
}
}
class ContextTask(self.celery.Task):
def __call__(self, *args, **kwargs):
with app.app_context():
return self.run(*args, **kwargs)
self.celery.Task = ContextTask
# Make QueueOnce app context aware.
class ContextQueueOnce(QueueOnce):
def __call__(self, *args, **kwargs):
with app.app_context():
return super(ContextQueueOnce,
self).__call__(*args, **kwargs)
# Attach to celery object for easy access.
self.celery.QueueOnce = ContextQueueOnce
app = self
if 'root_path' in self.config:
self.root_path = self.config['root_path']
if 'WHYIS_TEMPLATE_DIR' in self.config and app.config[
'WHYIS_TEMPLATE_DIR'] is not None:
my_loader = jinja2.ChoiceLoader([
jinja2.FileSystemLoader(p)
for p in self.config['WHYIS_TEMPLATE_DIR']
] + [app.jinja_loader])
app.jinja_loader = my_loader
@self.celery.task(base=QueueOnce, once={'graceful': True})
def process_resource(service_name, taskid=None):
service = self.config['inferencers'][service_name]
service.process_graph(app.db)
@self.celery.task
def process_nanopub(nanopub_uri, service_name, taskid=None):
service = self.config['inferencers'][service_name]
print(service, nanopub_uri)
if app.nanopub_manager.is_current(nanopub_uri):
nanopub = app.nanopub_manager.get(nanopub_uri)
service.process_graph(nanopub)
else:
print("Skipping retired nanopub", nanopub_uri)
def setup_periodic_task(task):
@self.celery.task
def find_instances():
print("Triggered task", task['name'])
for x, in task['service'].getInstances(app.db):
task['do'](x)
@self.celery.task
def do_task(uri):
print("Running task", task['name'], 'on', uri)
resource = app.get_resource(uri)
# result never used
task['service'].process_graph(resource.graph)
task['service'].app = app
task['find_instances'] = find_instances
task['do'] = do_task
return task
app.inference_tasks = []
if 'inference_tasks' in self.config:
app.inference_tasks = [
setup_periodic_task(task)
for task in self.config['inference_tasks']
]
for name, task in list(self.config['inferencers'].items()):
task.app = app
for task in app.inference_tasks:
if 'schedule' in task:
#print "Scheduling task", task['name'], task['schedule']
self.celery.add_periodic_task(crontab(**task['schedule']),
task['find_instances'].s(),
name=task['name'])
else:
task['find_instances'].delay()
@self.celery.task()
def update(nanopub_uri):
'''gets called whenever there is a change in the knowledge graph.
Performs a breadth-first knowledge expansion of the current change.'''
#print "Updating on", nanopub_uri
#if not app.nanopub_manager.is_current(nanopub_uri):
# print("Skipping retired nanopub", nanopub_uri)
# return
nanopub = app.nanopub_manager.get(nanopub_uri)
nanopub_graph = ConjunctiveGraph(nanopub.store)
if 'inferencers' in self.config:
for name, service in list(self.config['inferencers'].items()):
service.app = self
if service.query_predicate == self.NS.whyis.updateChangeQuery:
if service.getInstances(nanopub_graph):
print("invoking", name, nanopub_uri)
process_nanopub.apply_async(kwargs={
'nanopub_uri': nanopub_uri,
'service_name': name
},
priority=1)
for name, service in list(self.config['inferencers'].items()):
service.app = self
if service.query_predicate == self.NS.whyis.globalChangeQuery:
process_resource.apply_async(
kwargs={'service_name': name}, priority=5)
def run_update(nanopub_uri):
update.apply_async(args=[nanopub_uri], priority=9)
self.nanopub_update_listener = run_update
app = self
@self.celery.task(base=self.celery.QueueOnce,
once={'graceful': True},
retry_backoff=True,
retry_jitter=True,
autoretry_for=(Exception, ),
max_retries=4,
bind=True)
def run_importer(self, entity_name):
entity_name = URIRef(entity_name)
print('importing', entity_name)
importer = app.find_importer(entity_name)
if importer is None:
return
importer.app = app
modified = importer.last_modified(entity_name, app.db,
app.nanopub_manager)
updated = importer.modified(entity_name)
if updated is None:
updated = datetime.now(pytz.utc)
print("Remote modified:", updated, type(updated),
"Local modified:", modified, type(modified))
if modified is None or (updated - modified
).total_seconds() > importer.min_modified:
importer.load(entity_name, app.db, app.nanopub_manager)
self.run_importer = run_importer
self.template_imports = {}
if 'template_imports' in self.config:
for name, imp in list(self.config['template_imports'].items()):
try:
m = importlib.import_module(imp)
self.template_imports[name] = m
except Exception:
print(
"Error importing module %s into template variable %s."
% (imp, name))
raise
self.nanopub_manager = NanopublicationManager(
self.db.store,
Namespace('%s/pub/' % (self.config['lod_prefix'])),
self,
update_listener=self.nanopub_update_listener)
if 'CACHE_TYPE' in self.config:
from flask_caching import Cache
self.cache = Cache(self)
else:
self.cache = None
_file_depot = None
@property
def file_depot(self):
if self._file_depot is None:
if DepotManager.get('files') is None:
DepotManager.configure('files', self.config['file_archive'])
self._file_depot = DepotManager.get('files')
return self._file_depot
_nanopub_depot = None
@property
def nanopub_depot(self):
if self._nanopub_depot is None and 'nanopub_archive' in self.config:
if DepotManager.get('nanopublications') is None:
DepotManager.configure('nanopublications',
self.config['nanopub_archive'])
self._nanopub_depot = DepotManager.get('nanopublications')
return self._nanopub_depot
def configure_database(self):
"""
Database configuration should be set here
"""
self.NS = NS
self.NS.local = rdflib.Namespace(self.config['lod_prefix'] + '/')
self.admin_db = database.engine_from_config(self.config, "admin_")
self.db = database.engine_from_config(self.config, "knowledge_")
self.db.app = self
self.vocab = ConjunctiveGraph()
#print URIRef(self.config['vocab_file'])
default_vocab = Graph(store=self.vocab.store)
default_vocab.parse(source=os.path.abspath(
os.path.join(os.path.dirname(__file__), "default_vocab.ttl")),
format="turtle",
publicID=str(self.NS.local))
custom_vocab = Graph(store=self.vocab.store)
custom_vocab.parse(self.config['vocab_file'],
format="turtle",
publicID=str(self.NS.local))
self.datastore = WhyisUserDatastore(self.admin_db, {},
self.config['lod_prefix'])
self.security = Security(self,
self.datastore,
register_form=ExtendedRegisterForm)
def __weighted_route(self, *args, **kwargs):
"""
Override the match_compare_key function of the Rule created by invoking Flask.route.
This can only be done on the app, not in a blueprint, because blueprints lazily add Rule's when they are registered on an app.
"""
def decorator(view_func):
compare_key = kwargs.pop('compare_key', None)
# register view_func with route
self.route(*args, **kwargs)(view_func)
if compare_key is not None:
rule = self.url_map._rules[-1]
rule.match_compare_key = lambda: compare_key
return view_func
return decorator
def map_entity(self, name):
for importer in self.config['namespaces']:
if importer.matches(name):
new_name = importer.map(name)
#print 'Found mapped URI', new_name
return new_name, importer
return None, None
def find_importer(self, name):
for importer in self.config['namespaces']:
if importer.resource_matches(name):
return importer
return None
class Entity(rdflib.resource.Resource):
_this = None
def this(self):
if self._this is None:
self._this = self._graph.app.get_entity(self.identifier)
return self._this
_description = None
def description(self):
if self._description is None:
# try:
result = Graph()
# try:
for quad in self._graph.query(
'''
construct {
?e ?p ?o.
?o rdfs:label ?label.
?o skos:prefLabel ?prefLabel.
?o dc:title ?title.
?o foaf:name ?name.
?o ?pattr ?oattr.
?oattr rdfs:label ?oattrlabel
} where {
graph ?g {
?e ?p ?o.
}
?g a np:Assertion.
optional {
?e sio:hasAttribute|sio:hasPart ?o.
?o ?pattr ?oattr.
optional {
?oattr rdfs:label ?oattrlabel.
}
}
optional {
?o rdfs:label ?label.
}
optional {
?o skos:prefLabel ?prefLabel.
}
optional {
?o dc:title ?title.
}
optional {
?o foaf:name ?name.
}
}''',
initNs=NS.prefixes,
initBindings={'e': self.identifier}):
if len(quad) == 3:
s, p, o = quad
else:
# Last term is never used
s, p, o, _ = quad
result.add((s, p, o))
# except:
# pass
self._description = result.resource(self.identifier)
# except Exception as e:
# print str(e), self.identifier
# raise e
return self._description
def get_resource(self, entity, async_=True, retrieve=True):
if retrieve:
mapped_name, importer = self.map_entity(entity)
if mapped_name is not None:
entity = mapped_name
if importer is None:
importer = self.find_importer(entity)
print(entity, importer)
if importer is not None:
modified = importer.last_modified(entity, self.db,
self.nanopub_manager)
if modified is None or async_ is False:
self.run_importer(entity)
elif not importer.import_once:
print("Type of modified is", type(modified))
self.run_importer.delay(entity)
return self.Entity(self.db, entity)
def configure_template_filters(self):
filters.configure(self)
if 'filters' in self.config:
for name, fn in self.config['filters'].items():
self.template_filter(name)(fn)
def add_file(self, f, entity, nanopub):
entity = rdflib.URIRef(entity)
old_nanopubs = []
for np_uri, np_assertion, in self.db.query(
'''select distinct ?np ?assertion where {
hint:Query hint:optimizer "Runtime" .
graph ?assertion {?e whyis:hasFileID ?fileid}
?np np:hasAssertion ?assertion.
}''',
initNs=NS.prefixes,
initBindings=dict(e=rdflib.URIRef(entity))):
if not self._can_edit(np_uri):
raise Unauthorized()
old_nanopubs.append((np_uri, np_assertion))
fileid = self.file_depot.create(f.stream, f.filename, f.mimetype)
nanopub.add((nanopub.identifier, NS.sio.isAbout, entity))
nanopub.assertion.add((entity, NS.whyis.hasFileID, Literal(fileid)))
if current_user._get_current_object() is not None and hasattr(
current_user, 'identifier'):
nanopub.assertion.add(
(entity, NS.dc.contributor, current_user.identifier))
nanopub.assertion.add(
(entity, NS.dc.created, Literal(datetime.utcnow())))
nanopub.assertion.add(
(entity, NS.ov.hasContentType, Literal(f.mimetype)))
nanopub.assertion.add((entity, NS.RDF.type, NS.mediaTypes[f.mimetype]))
nanopub.assertion.add(
(NS.mediaTypes[f.mimetype], NS.RDF.type, NS.dc.FileFormat))
nanopub.assertion.add(
(entity, NS.RDF.type, NS.mediaTypes[f.mimetype.split('/')[0]]))
nanopub.assertion.add((NS.mediaTypes[f.mimetype.split('/')[0]],
NS.RDF.type, NS.dc.FileFormat))
nanopub.assertion.add((entity, NS.RDF.type, NS.pv.File))
if current_user._get_current_object() is not None and hasattr(
current_user, 'identifier'):
nanopub.pubinfo.add((nanopub.assertion.identifier,
NS.dc.contributor, current_user.identifier))
nanopub.pubinfo.add((nanopub.assertion.identifier, NS.dc.created,
Literal(datetime.utcnow())))
return old_nanopubs
def delete_file(self, entity):
for np_uri, in self.db.query('''select distinct ?np where {
hint:Query hint:optimizer "Runtime" .
graph ?np_assertion {?e whyis:hasFileID ?fileid}
?np np:hasAssertion ?np_assertion.
}''',
initNs=NS.prefixes,
initBindings=dict(e=entity)):
if not self._can_edit(np_uri):
raise Unauthorized()
self.nanopub_manager.retire(np_uri)
def add_files(self, uri, files, upload_type=NS.pv.File):
nanopub = self.nanopub_manager.new()
added_files = False
old_nanopubs = []
nanopub.assertion.add((uri, self.NS.RDF.type, upload_type))
if upload_type == URIRef("http://purl.org/dc/dcmitype/Collection"):
for f in files:
filename = secure_filename(f.filename)
if filename != '':
file_uri = URIRef(uri + "/" + filename)
old_nanopubs.extend(self.add_file(f, file_uri, nanopub))
nanopub.assertion.add((uri, NS.dc.hasPart, file_uri))
added_files = True
elif upload_type == NS.dcat.Dataset:
for f in files:
filename = secure_filename(f.filename)
if filename != '':
file_uri = URIRef(uri + "/" + filename)
old_nanopubs.extend(self.add_file(f, file_uri, nanopub))
nanopub.assertion.add(
(uri, NS.dcat.distribution, file_uri))
nanopub.assertion.add(
(file_uri, NS.RDF.type, NS.dcat.Distribution))
nanopub.assertion.add(
(file_uri, NS.dcat.downloadURL, file_uri))
added_files = True
else:
for f in files:
if f.filename != '':
old_nanopubs.extend(self.add_file(f, uri, nanopub))
nanopub.assertion.add((uri, NS.RDF.type, NS.pv.File))
added_files = True
break
if added_files:
for old_np, old_np_assertion in old_nanopubs:
nanopub.pubinfo.add((nanopub.assertion.identifier,
NS.prov.wasRevisionOf, old_np_assertion))
self.nanopub_manager.retire(old_np)
for n in self.nanopub_manager.prepare(nanopub):
self.nanopub_manager.publish(n)
def _can_edit(self, uri):
if self.managed:
return True
if current_user._get_current_object() is None:
# This isn't null even when not authenticated, unless we are an autonomic agent.
return True
if not hasattr(current_user,
'identifier'): # This is an anonymous user.
return False
if current_user.has_role('Publisher') or current_user.has_role(
'Editor') or current_user.has_role('Admin'):
return True
if self.db.query('''ask {
?nanopub np:hasAssertion ?assertion; np:hasPublicationInfo ?info.
graph ?info { ?assertion dc:contributor ?user. }
}''',
initBindings=dict(nanopub=uri,
user=current_user.identifier),
initNs=dict(np=self.NS.np, dc=self.NS.dc)):
#print "Is owner."
return True
return False
def configure_views(self):
def sort_by(resources, property):
return sorted(resources, key=lambda x: x.value(property))
def camel_case_split(identifier):
matches = finditer(
'.+?(?:(?<=[a-z])(?=[A-Z])|(?<=[A-Z])(?=[A-Z][a-z])|$)',
identifier)
return [m.group(0) for m in matches]
label_properties = [
self.NS.skos.prefLabel, self.NS.RDFS.label, self.NS.schema.name,
self.NS.dc.title, self.NS.foaf.name, self.NS.schema.name,
self.NS.skos.notation
]
@lru_cache(maxsize=1000)
def get_remote_label(uri):
for db in [self.db, self.admin_db]:
g = Graph()
try:
db.nsBindings = {}
g += db.query('''select ?s ?p ?o where {
hint:Query hint:optimizer "Runtime" .
?s ?p ?o.}''',
initNs=self.NS.prefixes,
initBindings=dict(s=uri))
db.nsBindings = {}
except:
pass
resource_entity = g.resource(uri)
if len(resource_entity.graph) == 0:
#print "skipping", db
continue
for property in label_properties:
labels = self.lang_filter(resource_entity[property])
if len(labels) > 0:
return labels[0]
if len(labels) == 0:
name = [
x.value for x in [
resource_entity.value(self.NS.foaf.givenName),
resource_entity.value(self.NS.foaf.familyName)
] if x is not None
]
if len(labels) == 0:
name = [
x.value for x in [
resource_entity.value(
self.NS.schema.givenName),
resource_entity.value(
self.NS.schema.familyName)
] if x is not None
]
if len(name) > 0:
label = ' '.join(name)
return label
try:
label = self.db.qname(uri).split(":")[1].replace("_", " ")
return ' '.join(camel_case_split(label)).title()
except Exception as e:
print(str(e), uri)
return str(uri)
def get_label(resource):
for property in label_properties:
labels = self.lang_filter(resource[property])
#print "mem", property, label
if len(labels) > 0:
return labels[0]
return get_remote_label(resource.identifier)
self.get_label = get_label
def initialize_g():
if not hasattr(g, "initialized"):
g.initialized = True
g.ns = self.NS
g.get_summary = get_summary
g.get_label = get_label
g.labelize = self.labelize
g.get_resource = self.get_resource
g.get_entity = self.get_entity
g.rdflib = rdflib
g.isinstance = isinstance
g.current_user = current_user
g.slugify = slugify
g.db = self.db
self.initialize_g = initialize_g
@self.before_request
def load_forms():
if 'authenticators' in self.config:
for authenticator in self.config['authenticators']:
user = authenticator.authenticate(request, self.datastore,
self.config)
if user is not None:
# login_user(user)
break
initialize_g()
@self.login_manager.user_loader
def load_user(user_id):
if user_id != None:
#try:
user = self.datastore.find_user(id=user_id)
return user
#except:
# return None
else:
return None
# def get_graphs(graphs):
# query = '''select ?s ?p ?o ?g where {
# hint:Query hint:optimizer "Runtime" .
#
# graph ?g {?s ?p ?o}
# } values ?g { %s }'''
# query = query % ' '.join([graph.n3() for graph in graphs])
# #print query
# quads = self.db.store.query(query, initNs=self.NS.prefixes)
# result = rdflib.Dataset()
# result.addN(quads)
# return result
# def explain(graph):
# values = ')\n ('.join([' '.join([x.n3() for x in triple]) for triple in graph.triples((None,None,None))])
# values = 'VALUES (?s ?p ?o)\n{\n('+ values + ')\n}'
#
# try:
# nanopubs = self.db.query('''select distinct ?np where {
# hint:Query hint:optimizer "Runtime" .
# ?np np:hasAssertion?|np:hasProvenance?|np:hasPublicationInfo? ?g;
# np:hasPublicationInfo ?pubinfo;
# np:hasAssertion ?assertion;
# graph ?assertion { ?s ?p ?o.}
# }''' + values, initNs=self.NS.prefixes)
# result = ConjunctiveGraph()
# for nanopub_uri, in nanopubs:
# self.nanopub_manager.get(nanopub_uri, result)
# except Exception as e:
# print(str(e), entity)
# raise e
# return result.resource(entity)
def get_entity_sparql(entity):
try:
statements = self.db.query(
'''select distinct ?s ?p ?o ?g where {
hint:Query hint:optimizer "Runtime" .
?np np:hasAssertion?|np:hasProvenance?|np:hasPublicationInfo? ?g;
np:hasPublicationInfo ?pubinfo;
np:hasAssertion ?assertion;
{graph ?np { ?np sio:isAbout ?e.}}
UNION
{graph ?assertion { ?e ?p ?o.}}
graph ?g { ?s ?p ?o }
}''',
initBindings={'e': entity},
initNs=self.NS.prefixes)
result = ConjunctiveGraph()
result.addN(statements)
except Exception as e:
print(str(e), entity)
raise e
#print result.serialize(format="trig")
return result.resource(entity)
# def get_entity_disk(entity):
# try:
# nanopubs = self.db.query('''select distinct ?np where {
# hint:Query hint:optimizer "Runtime" .
# ?np np:hasAssertion?|np:hasProvenance?|np:hasPublicationInfo? ?g;
# np:hasPublicationInfo ?pubinfo;
# np:hasAssertion ?assertion;
#
# {graph ?np { ?np sio:isAbout ?e.}}
# UNION
# {graph ?assertion { ?e ?p ?o.}}
# }''',initBindings={'e':entity}, initNs=self.NS.prefixes)
# result = ConjunctiveGraph()
# for nanopub_uri, in nanopubs:
# self.nanopub_manager.get(nanopub_uri, result)
# # result.addN(nanopubs)
# except Exception as e:
# print(str(e), entity)
# raise e
# #print result.serialize(format="trig")
# return result.resource(entity)
get_entity = get_entity_sparql
self.get_entity = get_entity
def get_summary(resource):
summary_properties = [
self.NS.skos.definition, self.NS.schema.description,
self.NS.dc.abstract, self.NS.dc.description,
self.NS.dc.summary, self.NS.RDFS.comment,
self.NS.dcelements.description,
URIRef("http://purl.obolibrary.org/obo/IAO_0000115"),
self.NS.prov.value, self.NS.sio.hasValue
]
if 'summary_properties' in self.config:
summary_properties.extend(self.config['summary_properties'])
for property in summary_properties:
terms = self.lang_filter(resource[property])
for term in terms:
yield (property, term)
self.get_summary = get_summary
if 'WHYIS_CDN_DIR' in self.config and self.config[
'WHYIS_CDN_DIR'] is not None:
@self.route('/cdn/<path:filename>')
def cdn(filename):
return send_from_directory(self.config['WHYIS_CDN_DIR'],
filename)
def render_view(resource, view=None, args=None, use_cache=True):
self.initialize_g()
if view is None and 'view' in request.args:
view = request.args['view']
if view is None:
view = 'view'
if use_cache and self.cache is not None:
key = str((str(resource.identifier), view))
result = self.cache.get(key)
if result is not None:
r, headers = result
return r, 200, headers
template_args = dict()
template_args.update(self.template_imports)
template_args.update(
dict(ns=self.NS,
this=resource,
g=g,
current_user=current_user,
isinstance=isinstance,
args=request.args if args is None else args,
url_for=url_for,
app=self,
view=view,
get_entity=get_entity,
get_summary=get_summary,
search=search,
rdflib=rdflib,
config=self.config,
hasattr=hasattr,
set=set))
types = []
if 'as' in request.args:
types = [URIRef(request.args['as']), 0]
types.extend(
(x, 1) for x in self.vocab[resource.identifier:NS.RDF.type])
if len(
types
) == 0: # KG types cannot override vocab types. This should keep views stable where critical.
types.extend([(x.identifier, 1) for x in resource[NS.RDF.type]
if isinstance(x.identifier, rdflib.URIRef)])
#if len(types) == 0:
types.append([self.NS.RDFS.Resource, 100])
type_string = ' '.join(
["(%s %d '%s')" % (x.n3(), i, view) for x, i in types])
view_query = '''select ?id ?view (count(?mid)+?priority as ?rank) ?class ?c ?content_type where {
values (?c ?priority ?id) { %s }
?c rdfs:subClassOf* ?mid.
?mid rdfs:subClassOf* ?class.
?class ?viewProperty ?view.
?viewProperty rdfs:subPropertyOf* whyis:hasView.
?viewProperty dc:identifier ?id.
optional {
?viewProperty dc:format ?content_type
}
} group by ?c ?class ?content_type order by ?rank
''' % type_string
#print view_query
views = list(
self.vocab.query(view_query,
initNs=dict(whyis=self.NS.whyis,
dc=self.NS.dc)))
if len(views) == 0:
abort(404)
headers = {'Content-Type': "text/html"}
extension = views[0]['view'].value.split(".")[-1]
if extension in DATA_EXTENSIONS:
headers['Content-Type'] = DATA_EXTENSIONS[extension]
print(views[0]['view'], views[0]['content_type'])
if views[0]['content_type'] is not None:
headers['Content-Type'] = views[0]['content_type']
# default view (list of nanopubs)
# if available, replace with class view
# if available, replace with instance view
return render_template(views[0]['view'].value,
**template_args), 200, headers
self.render_view = render_view
# Register blueprints
self.register_blueprint(nanopub_blueprint)
self.register_blueprint(sparql_blueprint)
self.register_blueprint(entity_blueprint)
self.register_blueprint(tableview_blueprint)
def get_entity_uri(self, name, format):
content_type = None
if format is not None:
if format in DATA_EXTENSIONS:
content_type = DATA_EXTENSIONS[format]
else:
name = '.'.join([name, format])
if name is not None:
entity = self.NS.local[name]
elif 'uri' in request.args:
entity = URIRef(request.args['uri'])
else:
entity = self.NS.local.Home
return entity, content_type
def get_send_file_max_age(self, filename):
if self.debug:
return 0
else:
return Empty.get_send_file_max_age(self, filename)