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Autodiscover oEmbed endpoint from returned HTML (#10822)

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Searches the returned HTML for an oEmbed endpoint using the
autodiscovery mechanism (`<link rel=...>`), and will request it
to generate the preview.
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Patrick Cloke 2021-10-08 14:14:42 -04:00 • committed by GitHub
parent 593eeac19e
commit 1b112840d2
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5 changed files with 222 additions and 53 deletions
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40
tests/test_preview.py
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@ -13,7 +13,8 @@
# limitations under the License.
from synapse.rest.media.v1.preview_url_resource import (
decode_and_calc_og,
_calc_og,
decode_body,
get_html_media_encoding,
summarize_paragraphs,
)
@ -158,7 +159,8 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
@ -173,7 +175,8 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
@ -191,7 +194,8 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(
og,
@ -212,7 +216,8 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
@ -225,7 +230,8 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": None, "og:description": "Some text."})
@ -239,7 +245,8 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": "Title", "og:description": "Some text."})
@ -253,21 +260,22 @@ class CalcOgTestCase(unittest.TestCase):
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": None, "og:description": "Some text."})
def test_empty(self):
"""Test a body with no data in it."""
html = b""
og = decode_and_calc_og(html, "http://example.com/test.html")
self.assertEqual(og, {})
tree = decode_body(html)
self.assertIsNone(tree)
def test_no_tree(self):
"""A valid body with no tree in it."""
html = b"\x00"
og = decode_and_calc_og(html, "http://example.com/test.html")
self.assertEqual(og, {})
tree = decode_body(html)
self.assertIsNone(tree)
def test_invalid_encoding(self):
"""An invalid character encoding should be ignored and treated as UTF-8, if possible."""
@ -279,9 +287,8 @@ class CalcOgTestCase(unittest.TestCase):
</body>
</html>
"""
og = decode_and_calc_og(
html, "http://example.com/test.html", "invalid-encoding"
)
tree = decode_body(html, "invalid-encoding")
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
def test_invalid_encoding2(self):
@ -295,7 +302,8 @@ class CalcOgTestCase(unittest.TestCase):
</body>
</html>
"""
og = decode_and_calc_og(html, "http://example.com/test.html")
tree = decode_body(html)
og = _calc_og(tree, "http://example.com/test.html")
self.assertEqual(og, {"og:title": "ÿÿ Foo", "og:description": "Some text."})