def test_url_percent_encode(self):
self.assertEqual('a ', percent_decode('a%20'))
self.assertEqual('að', percent_decode('a%C3%B0'))
self.assertEqual('a ', percent_decode_plus('a+'))
self.assertEqual('að', percent_decode_plus('a%C3%B0'))
self.assertEqual('a%20', percent_encode('a '))
self.assertEqual('a%C3%B0', percent_encode('að'))
self.assertEqual('a+', percent_encode_plus('a '))
self.assertEqual('a%C3%B0', percent_encode_plus('að'))
def test_url_percent_encode(self):
self.assertEqual('a ', percent_decode('a%20'))
self.assertEqual('að', percent_decode('a%C3%B0'))
self.assertEqual('a ', percent_decode_plus('a+'))
self.assertEqual('að', percent_decode_plus('a%C3%B0'))
self.assertEqual('a%20', percent_encode('a '))
self.assertEqual('a%C3%B0', percent_encode('að'))
self.assertEqual('a+', percent_encode_plus('a '))
self.assertEqual('a%C3%B0', percent_encode_plus('að'))
def iter_links_by_attrib(self, element):
'''Iterate an element by looking at its attributes for links.'''
for attrib_name in element.attrib.keys():
attrib_value = element.attrib.get(attrib_name)
if attrib_name in self.LINK_ATTRIBUTES:
if self.javascript_scraper and \
attrib_value.lstrip().startswith('javascript:'):
for link in self.iter_links_by_js_attrib(
attrib_name, percent_decode(attrib_value)):
yield link
else:
yield attrib_name, attrib_value
elif self.javascript_scraper and \
attrib_name[:5] in self.DYNAMIC_ATTRIBUTES:
for link in self.iter_links_by_js_attrib(attrib_name,
attrib_value):
yield link
elif attrib_name.startswith('data-'):
if is_likely_link(attrib_value) \
and not is_unlikely_link(attrib_value):
yield attrib_name, attrib_value
elif attrib_name == 'srcset':
items = self.iter_links_by_srcset_attrib(
attrib_name, attrib_value)
for item in items:
yield item
def iter_links_by_attrib(self, element):
'''Iterate an element by looking at its attributes for links.'''
for attrib_name in element.attrib.keys():
try:
attrib_value = element.attrib.get(attrib_name)
except ValueError:
# lxml.etree.__getNsTag can raise ValueError: Empty tag name
# https://bugs.python.org/issue28236
attrib_value = ""
if attrib_name in self.LINK_ATTRIBUTES:
if self.javascript_scraper and \
attrib_value.lstrip().startswith('javascript:'):
for link in self.iter_links_by_js_attrib(
attrib_name, percent_decode(attrib_value)):
yield link
else:
yield attrib_name, attrib_value
elif self.javascript_scraper and \
attrib_name[:5] in self.DYNAMIC_ATTRIBUTES:
for link in self.iter_links_by_js_attrib(
attrib_name, attrib_value):
yield link
elif attrib_name.startswith('data-'):
if is_likely_link(attrib_value) \
and not is_unlikely_link(attrib_value):
yield attrib_name, attrib_value
elif attrib_name == 'srcset':
items = self.iter_links_by_srcset_attrib(
attrib_name, attrib_value)
for item in items:
yield item
