def _normalize_query(uri):
query = uri.query
try:
items = urlparse.parse_qsl(query, keep_blank_values=True)
except ValueError:
# If we can't parse the query string, we better preserve it as it was.
return query
# Python sorts are stable, so preserving relative ordering of items with
# the same key doesn't require any work from us
items = sorted(items, key=lambda x: x[0])
# Remove query params that are blacklisted
items = [i for i in items if i[0] not in BLACKLISTED_QUERY_PARAMS]
# Normalise percent-encoding for query items
query = _normalize_queryitems(items)
return query
def _normalize_query(uri):
query = uri.query
try:
items = urlparse.parse_qsl(query, keep_blank_values=True)
except ValueError:
# If we can't parse the query string, we better preserve it as it was.
return query
# Python sorts are stable, so preserving relative ordering of items with
# the same key doesn't require any work from us
items = sorted(items, key=lambda x: x[0])
# Remove query params that are blacklisted
items = [i for i in items if not _blacklisted_query_param(i[0])]
# Normalise percent-encoding for query items
query = _normalize_queryitems(items)
return query
