def get(self, request):
additional_headers = {}
# Apache helpfully(!?) unescapes encoded hash characters. If we get one
# we know that the browser sent a '%23' (or else would have stripped it
# as a fragment identifier. We replace it with a '%23' so that our URI
# canonicalisation doesn't get stuck in an endless redirect loop.
doc_url = request.build_absolute_uri().replace('#', '%23')
# Given a URL 'http://example.org/doc/foo.bar' we check whether 'foo',
# has a type (ergo 'bar' is a format), and if not we assume that
# 'foo.bar' is part of the URI
for formats in (None, ()):
uri, format, is_local = doc_backward(doc_url, formats)
if uri and not IRI.match(uri):
raise Http404("Invalid IRI")
if not uri:
logger.debug("Could not resolve URL to a URI: %r", doc_url)
raise Http404("Could not resolve URL to a URI")
types = self.get_types(uri)
if types:
break
doc_url = doc_url.rsplit('.', 1)[0]
else:
logger.debug("Resource has no type, so is probably not known in these parts: %r", uri)
raise Http404("Resource has no type, so is probably not known in these parts")
expected_doc_url = urlparse.urljoin(doc_url, doc_forward(uri, request, format=format, described=True))
if self.check_canonical and expected_doc_url != doc_url:
logger.debug("Request for a non-canonical doc URL (%r) for %r, redirecting to %r", doc_url, uri, expected_doc_url)
return HttpResponsePermanentRedirect(expected_doc_url)
doc_uri = rdflib.URIRef(doc_forward(uri, request, format=None, described=True))
self.context.update({
'subject_uri': uri,
'doc_uri': doc_uri,
'format': format,
'types': types,
'show_follow_link': not is_local,
'no_index': not is_local,
'additional_headers': additional_headers,
})
subject_uri, doc_uri = self.context['subject_uri'], self.context['doc_uri']
types = self.context['types']
queries, graph = [], rdflib.ConjunctiveGraph()
for prefix, namespace_uri in NS.iteritems():
graph.namespace_manager.bind(prefix, namespace_uri)
graph += ((subject_uri, NS.rdf.type, t) for t in types)
subject = Resource(subject_uri, graph, self.endpoint)
for query in subject.get_queries():
graph += self.endpoint.query(query)
queries.append(query)
licenses, datasets = set(), set()
for graph_name in graph.subjects(NS['ov'].describes):
graph.add((doc_uri, NS['dcterms'].source, graph_name))
licenses.update(graph.objects(graph_name, NS['dcterms'].license))
datasets.update(graph.objects(graph_name, NS['void'].inDataset))
if len(licenses) == 1:
for license_uri in licenses:
graph.add((doc_uri, NS['dcterms'].license, license_uri))
if not graph:
logger.debug("Graph for %r was empty; 404ing", uri)
raise Http404("Graph was empty")
self.template_name = subject.template_name or self.template_name
for template_override in self.template_overrides:
tn, types = template_override[0], template_override[1:]
if set(subject._graph.objects(subject._identifier, NS.rdf.type)) & set(map(expand, types)):
self.template_name = tn
break
self.context.update({
'graph': graph,
'subject': subject,
'licenses': [Resource(uri, graph, self.endpoint) for uri in licenses],
'datasets': [Resource(uri, graph, self.endpoint) for uri in datasets],
'queries': map(self.endpoint.normalize_query, queries),
'template_name': self.template_name,
})
self.set_renderers()
for doc_rdf_processor in self._doc_rdf_processors:
additional_context = doc_rdf_processor(self.request, self.context)
if additional_context:
self.context.update(additional_context)
# If no format was given explicitly (i.e. format parameter or
# extension) we inspect the Content-Type header.
if not format:
if request.renderers:
format = request.renderers[0].format
expected_doc_url = doc_forward(uri, request, format=format, described=True)
if expected_doc_url != doc_url:
additional_headers['Content-Location'] = expected_doc_url
# NOTE: This getattrs every atttr on subject, so would force
# memoization on any cached attributes. We call it as late as
# possible to make sure the graph won't change afterwards, making
# those cached results incorrect.
self.conneg += subject
if self.context['format']:
try:
return self.render_to_format(format=format)
except KeyError:
raise Http404
else:
return self.render()
def get(self, request):
additional_headers = {}
doc_url = request.build_absolute_uri()
uri, format, is_local = doc_backward(doc_url, set(self._renderers_by_format))
if not uri:
logger.debug("Could not resolve URL to a URI: %r", doc_url)
raise Http404
expected_doc_url = doc_forward(uri, request, format=format, described=True)
types = self.get_types(uri)
if not types:
logger.debug("Resource has no type, so is probably not known in these parts: %r", uri)
raise Http404
if self.check_canonical and expected_doc_url != doc_url:
logger.debug("Request for a non-canonical doc URL (%r) for %r, redirecting to %r", doc_url, uri, expected_doc_url)
return HttpResponsePermanentRedirect(expected_doc_url)
# If no format was given explicitly (i.e. format parameter or
# extension) we inspect the Content-Type header.
if not format:
renderers = self.get_renderers(request)
if renderers:
format = renderers[0].format
expected_doc_url = doc_forward(uri, request, format=format, described=True)
if expected_doc_url != doc_url:
additional_headers['Content-Location'] = expected_doc_url
doc_uri = rdflib.URIRef(doc_forward(uri, request, format=None, described=True))
context = {
'subject_uri': uri,
'doc_uri': doc_uri,
'format': format,
'types': types,
'show_follow_link': not is_local,
'no_index': not is_local,
'additional_headers': additional_headers,
}
subject_uri, doc_uri = context['subject_uri'], context['doc_uri']
types = context['types']
queries, graph = [], rdflib.ConjunctiveGraph()
for prefix, namespace_uri in NS.iteritems():
graph.namespace_manager.bind(prefix, namespace_uri)
graph += ((subject_uri, NS.rdf.type, t) for t in types)
subject = Resource(subject_uri, graph, self.endpoint)
for query in subject.get_queries():
graph += self.endpoint.query(query)
queries.append(query)
licenses, datasets = set(), set()
for graph_name in graph.subjects(NS['ov'].describes):
graph.add((doc_uri, NS['dcterms'].source, graph_name))
licenses.update(graph.objects(graph_name, NS['dcterms'].license))
datasets.update(graph.objects(graph_name, NS['void'].inDataset))
if len(licenses) == 1:
for license_uri in licenses:
graph.add((doc_uri, NS['dcterms'].license, license_uri))
if not graph:
logger.debug("Graph for %r was empty; 404ing", uri)
raise Http404
for doc_rdf_processor in self._doc_rdf_processors:
additional_context = doc_rdf_processor(request=request,
graph=graph,
doc_uri=doc_uri,
subject_uri=subject_uri,
subject=subject,
endpoint=self.endpoint,
renderers=self._renderers)
if additional_context:
context.update(additional_context)
context.update({
'graph': graph,
'subject': subject,
'licenses': [Resource(uri, graph, self.endpoint) for uri in licenses],
'datasets': [Resource(uri, graph, self.endpoint) for uri in datasets],
'queries': queries,
'template_name': subject.template_name,
})
template_name = subject.template_name or self.template_name
for template_override in self.template_overrides:
tn, types = template_override[0], template_override[1:]
print tn, types, subject.get_all('rdf:type')
if set(subject._graph.objects(subject._identifier, NS.rdf.type)) & set(map(expand, types)):
template_name = tn
break
if context['format']:
try:
return self.render_to_format(request, context, template_name, format)
except KeyError:
raise Http404
else:
return self.render(request, context, template_name)
def testUnicodeBackward(self):
for uri, url in self.TESTS:
if isinstance(uri, unicode):
self.assertEqual(doc_backward(url)[0], rdflib.URIRef(uri))
def get(self, request):
additional_headers = {}
# Apache helpfully(!?) unescapes encoded hash characters. If we get one
# we know that the browser sent a '%23' (or else would have stripped it
# as a fragment identifier. We replace it with a '%23' so that our URI
# canonicalisation doesn't get stuck in an endless redirect loop.
doc_url = request.build_absolute_uri().replace('#', '%23')
# Given a URL 'http://example.org/doc/foo.bar' we check whether 'foo',
# has a type (ergo 'bar' is a format), and if not we assume that
# 'foo.bar' is part of the URI
for formats in (None, ()):
uri, format, is_local = doc_backward(doc_url, formats)
if uri and not IRI.match(uri):
raise Http404("Invalid IRI")
if not uri:
logger.debug("Could not resolve URL to a URI: %r", doc_url)
raise Http404("Could not resolve URL to a URI")
types = self.get_types(uri)
if types:
break
doc_url = doc_url.rsplit('.', 1)[0]
else:
logger.debug(
"Resource has no type, so is probably not known in these parts: %r",
uri)
raise Http404(
"Resource has no type, so is probably not known in these parts"
)
expected_doc_url = urlparse.urljoin(
doc_url, doc_forward(uri, request, format=format, described=True))
if self.check_canonical and expected_doc_url != doc_url:
logger.debug(
"Request for a non-canonical doc URL (%r) for %r, redirecting to %r",
doc_url, uri, expected_doc_url)
return HttpResponsePermanentRedirect(expected_doc_url)
doc_uri = rdflib.URIRef(
doc_forward(uri, request, format=None, described=True))
self.context.update({
'subject_uri': uri,
'doc_uri': doc_uri,
'format': format,
'types': types,
'show_follow_link': not is_local,
'no_index': not is_local,
'additional_headers': additional_headers,
})
subject_uri, doc_uri = self.context['subject_uri'], self.context[
'doc_uri']
types = self.context['types']
queries, graph = [], rdflib.ConjunctiveGraph()
for prefix, namespace_uri in NS.iteritems():
graph.namespace_manager.bind(prefix, namespace_uri)
graph += ((subject_uri, NS.rdf.type, t) for t in types)
subject = Resource(subject_uri, graph, self.endpoint)
for query in subject.get_queries():
graph += self.endpoint.query(query)
queries.append(query)
licenses, datasets = set(), set()
for graph_name in graph.subjects(NS['ov'].describes):
graph.add((doc_uri, NS['dcterms'].source, graph_name))
licenses.update(graph.objects(graph_name, NS['dcterms'].license))
datasets.update(graph.objects(graph_name, NS['void'].inDataset))
if len(licenses) == 1:
for license_uri in licenses:
graph.add((doc_uri, NS['dcterms'].license, license_uri))
if not graph:
logger.debug("Graph for %r was empty; 404ing", uri)
raise Http404("Graph was empty")
self.template_name = subject.template_name or self.template_name
for template_override in self.template_overrides:
tn, types = template_override[0], template_override[1:]
if set(subject._graph.objects(
subject._identifier, NS.rdf.type)) & set(map(
expand, types)):
self.template_name = tn
break
self.context.update({
'graph':
graph,
'subject':
subject,
'licenses':
[Resource(uri, graph, self.endpoint) for uri in licenses],
'datasets':
[Resource(uri, graph, self.endpoint) for uri in datasets],
'queries':
map(self.endpoint.normalize_query, queries),
'template_name':
self.template_name,
})
self.set_renderers()
for doc_rdf_processor in self._doc_rdf_processors:
additional_context = doc_rdf_processor(self.request, self.context)
if additional_context:
self.context.update(additional_context)
# If no format was given explicitly (i.e. format parameter or
# extension) we inspect the Content-Type header.
if not format:
if request.renderers:
format = request.renderers[0].format
expected_doc_url = doc_forward(uri,
request,
format=format,
described=True)
if expected_doc_url != doc_url:
additional_headers['Content-Location'] = expected_doc_url
# NOTE: This getattrs every atttr on subject, so would force
# memoization on any cached attributes. We call it as late as
# possible to make sure the graph won't change afterwards, making
# those cached results incorrect.
self.conneg += subject
if self.context['format']:
try:
return self.render_to_format(format=format)
except KeyError:
raise Http404
else:
return self.render()
def testUnicodeBackward(self):
for uri, url in self.TESTS:
if isinstance(uri, unicode):
self.assertRelativeEqual(doc_backward(url)[0], uri)
self.assertRelativeEqual(doc_forward(doc_backward(url)[0], described=True), url)
