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try:
import json
assert json # workaround for pyflakes issue #13
except ImportError:
import simplejson as json
from rdflib.py3compat import PY3, format_doctest_out
from os import sep
from os.path import normpath
if PY3:
from urllib.parse import urljoin, urlsplit, urlunsplit
else:
from urlparse import urljoin, urlsplit, urlunsplit
from rdflib.parser import create_input_source
if PY3:
from io import StringIO
def source_to_json(source):
# TODO: conneg for JSON (fix support in rdflib's URLInputSource!)
source = create_input_source(source, format='json-ld')
stream = source.getByteStream()
try:
if PY3:
return json.load(StringIO(stream.read().decode('utf-8')))
else:
return json.load(stream)
finally:
stream.close()
VOCAB_DELIMS = ('#', '/', ':')
def split_iri(iri):
for delim in VOCAB_DELIMS:
at = iri.rfind(delim)
if at > -1:
return iri[:at+1], iri[at+1:]
return iri, None
@format_doctest_out
def norm_url(base, url):
"""
>>> norm_url('http://example.org/', '/one')
'http://example.org/one'
>>> norm_url('http://example.org/', '/one#')
'http://example.org/one#'
>>> norm_url('http://example.org/one', 'two')
'http://example.org/two'
>>> norm_url('http://example.org/one/', 'two')
'http://example.org/one/two'
>>> norm_url('http://example.org/', 'http://example.net/one')
'http://example.net/one'
"""
parts = urlsplit(urljoin(base, url))
path = normpath(parts[2])
if sep != '/':
path = '/'.join(path.split(sep))
if parts[2].endswith('/') and not path.endswith('/'):
path += '/'
result = urlunsplit(parts[0:2] + (path,) + parts[3:])
if url.endswith('#') and not result.endswith('#'):
result += '#'
return result
def context_from_urlinputsource(source):
if source.content_type == 'application/json':
# response_info was added to InputSource in rdflib 4.2
try:
links = source.response_info.getallmatchingheaders('Link')
except AttributeError:
return
for link in links:
if ' rel="http://www.w3.org/ns/json-ld#context"' in link:
i, j = link.index('<'), link.index('>')
if i > -1 and j > -1:
return urljoin(source.url, link[i+1:j])
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