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[utils] Fix and improve `find_element` and `find_elements` (#11443) 

Fix d710a6ca7c

Authored by: bashonly, Grub4K

Co-authored-by: Simon Sawicki <contact@grub4k.xyz>
This commit is contained in:
bashonly 2024-11-03 18:19:45 +00:00 committed by GitHub
parent 5c7a5aaab2
commit b103aca24d
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GPG Key ID: B5690EEEBB952194
2 changed files with 67 additions and 10 deletions
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54
test/test_traversal.py
View File

@ -13,6 +13,8 @@ from yt_dlp.utils import (
str_or_none,
)
from yt_dlp.utils.traversal import (
find_element,
find_elements,
require,
subs_list_to_dict,
traverse_obj,
@ -37,6 +39,14 @@ _TEST_DATA = {
'dict': {},
}
_TEST_HTML = '''<html><body>
<div class="a">1</div>
<div class="a" id="x" custom="z">2</div>
<div class="b" data-id="y" custom="z">3</div>
<p class="a">4</p>
<p id="d" custom="e">5</p>
</body></html>'''
class TestTraversal:
def test_traversal_base(self):
@ -521,6 +531,50 @@ class TestTraversalHelpers:
with pytest.raises(TypeError):
unpack()
def test_find_element(self):
for improper_kwargs in [
dict(attr='data-id'),
dict(value='y'),
dict(attr='data-id', value='y', cls='a'),
dict(attr='data-id', value='y', id='x'),
dict(cls='a', id='x'),
dict(cls='a', tag='p'),
dict(cls='[ab]', regex=True),
]:
with pytest.raises(AssertionError):
find_element(**improper_kwargs)(_TEST_HTML)
assert find_element(cls='a')(_TEST_HTML) == '1'
assert find_element(cls='a', html=True)(_TEST_HTML) == '<div class="a">1</div>'
assert find_element(id='x')(_TEST_HTML) == '2'
assert find_element(id='[ex]')(_TEST_HTML) is None
assert find_element(id='[ex]', regex=True)(_TEST_HTML) == '2'
assert find_element(id='x', html=True)(_TEST_HTML) == '<div class="a" id="x" custom="z">2</div>'
assert find_element(attr='data-id', value='y')(_TEST_HTML) == '3'
assert find_element(attr='data-id', value='y(?:es)?')(_TEST_HTML) is None
assert find_element(attr='data-id', value='y(?:es)?', regex=True)(_TEST_HTML) == '3'
assert find_element(
attr='data-id', value='y', html=True)(_TEST_HTML) == '<div class="b" data-id="y" custom="z">3</div>'
def test_find_elements(self):
for improper_kwargs in [
dict(tag='p'),
dict(attr='data-id'),
dict(value='y'),
dict(attr='data-id', value='y', cls='a'),
dict(cls='a', tag='div'),
dict(cls='[ab]', regex=True),
]:
with pytest.raises(AssertionError):
find_elements(**improper_kwargs)(_TEST_HTML)
assert find_elements(cls='a')(_TEST_HTML) == ['1', '2', '4']
assert find_elements(cls='a', html=True)(_TEST_HTML) == [
'<div class="a">1</div>', '<div class="a" id="x" custom="z">2</div>', '<p class="a">4</p>']
assert find_elements(attr='custom', value='z')(_TEST_HTML) == ['2', '3']
assert find_elements(attr='custom', value='[ez]')(_TEST_HTML) == []
assert find_elements(attr='custom', value='[ez]', regex=True)(_TEST_HTML) == ['2', '3', '5']
class TestDictGet:
def test_dict_get(self):

23
yt_dlp/utils/traversal.py
View File

@ -20,6 +20,7 @@ from ._utils import (
get_elements_html_by_class,
get_elements_html_by_attribute,
get_elements_by_attribute,
get_element_by_class,
get_element_html_by_attribute,
get_element_by_attribute,
get_element_html_by_id,
@ -373,7 +374,7 @@ def subs_list_to_dict(subs: list[dict] | None = None, /, *, ext=None):
@typing.overload
def find_element(*, attr: str, value: str, tag: str | None = None, html=False): ...
def find_element(*, attr: str, value: str, tag: str | None = None, html=False, regex=False): ...
@typing.overload
@ -381,14 +382,14 @@ def find_element(*, cls: str, html=False): ...
@typing.overload
def find_element(*, id: str, tag: str | None = None, html=False): ...
def find_element(*, id: str, tag: str | None = None, html=False, regex=False): ...
@typing.overload
def find_element(*, tag: str, html=False): ...
def find_element(*, tag: str, html=False, regex=False): ...
def find_element(*, tag=None, id=None, cls=None, attr=None, value=None, html=False):
def find_element(*, tag=None, id=None, cls=None, attr=None, value=None, html=False, regex=False):
# deliberately using `id=` and `cls=` for ease of readability
assert tag or id or cls or (attr and value), 'One of tag, id, cls or (attr AND value) is required'
ANY_TAG = r'[\w:.-]+'
@ -397,17 +398,18 @@ def find_element(*, tag=None, id=None, cls=None, attr=None, value=None, html=Fal
assert not cls, 'Cannot match both attr and cls'
assert not id, 'Cannot match both attr and id'
func = get_element_html_by_attribute if html else get_element_by_attribute
return functools.partial(func, attr, value, tag=tag or ANY_TAG)
return functools.partial(func, attr, value, tag=tag or ANY_TAG, escape_value=not regex)
elif cls:
assert not id, 'Cannot match both cls and id'
assert tag is None, 'Cannot match both cls and tag'
func = get_element_html_by_class if html else get_elements_by_class
assert not regex, 'Cannot use regex with cls'
func = get_element_html_by_class if html else get_element_by_class
return functools.partial(func, cls)
elif id:
func = get_element_html_by_id if html else get_element_by_id
return functools.partial(func, id, tag=tag or ANY_TAG)
return functools.partial(func, id, tag=tag or ANY_TAG, escape_value=not regex)
index = int(bool(html))
return lambda html: get_element_text_and_html_by_tag(tag, html)[index]
@ -418,19 +420,20 @@ def find_elements(*, cls: str, html=False): ...
@typing.overload
def find_elements(*, attr: str, value: str, tag: str | None = None, html=False): ...
def find_elements(*, attr: str, value: str, tag: str | None = None, html=False, regex=False): ...
def find_elements(*, tag=None, cls=None, attr=None, value=None, html=False):
def find_elements(*, tag=None, cls=None, attr=None, value=None, html=False, regex=False):
# deliberately using `cls=` for ease of readability
assert cls or (attr and value), 'One of cls or (attr AND value) is required'
if attr and value:
assert not cls, 'Cannot match both attr and cls'
func = get_elements_html_by_attribute if html else get_elements_by_attribute
return functools.partial(func, attr, value, tag=tag or r'[\w:.-]+')
return functools.partial(func, attr, value, tag=tag or r'[\w:.-]+', escape_value=not regex)
assert not tag, 'Cannot match both cls and tag'
assert not regex, 'Cannot use regex with cls'
func = get_elements_html_by_class if html else get_elements_by_class
return functools.partial(func, cls)