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# -*- coding: utf-8 -*-
# https://github.com/RDFLib/rdflib-jsonld/blob/feature/json-ld-1.1/rdflib_jsonld/util.py
import typing as t
if t.TYPE_CHECKING:
import json
else:
try:
import json
assert json # workaround for pyflakes issue #13
except ImportError:
import simplejson as json
from os import sep
from os.path import normpath
from urllib.parse import urljoin, urlsplit, urlunsplit
from rdflib.parser import create_input_source
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:
return json.load(StringIO(stream.read().decode("utf-8")))
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
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'
>>> norm_url('http://example.org/', 'http://example.org//one')
'http://example.org//one'
"""
if "://" in url:
return url
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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