559 lines
20 KiB
Python
559 lines
20 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from synapse.media.preview_html import (
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_get_html_media_encodings,
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decode_body,
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parse_html_to_open_graph,
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summarize_paragraphs,
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)
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from tests import unittest
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try:
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import lxml
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except ImportError:
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lxml = None # type: ignore[assignment]
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class SummarizeTestCase(unittest.TestCase):
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if not lxml:
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skip = "url preview feature requires lxml"
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def test_long_summarize(self) -> None:
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example_paras = [
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"""Tromsø (Norwegian pronunciation: [ˈtrʊmsœ] ( listen); Northern Sami:
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Romsa; Finnish: Tromssa[2] Kven: Tromssa) is a city and municipality in
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Troms county, Norway. The administrative centre of the municipality is
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the city of Tromsø. Outside of Norway, Tromso and Tromsö are
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alternative spellings of the city.Tromsø is considered the northernmost
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city in the world with a population above 50,000. The most populous town
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north of it is Alta, Norway, with a population of 14,272 (2013).""",
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"""Tromsø lies in Northern Norway. The municipality has a population of
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(2015) 72,066, but with an annual influx of students it has over 75,000
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most of the year. It is the largest urban area in Northern Norway and the
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third largest north of the Arctic Circle (following Murmansk and Norilsk).
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Most of Tromsø, including the city centre, is located on the island of
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Tromsøya, 350 kilometres (217 mi) north of the Arctic Circle. In 2012,
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Tromsøya had a population of 36,088. Substantial parts of the urban area
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are also situated on the mainland to the east, and on parts of Kvaløya—a
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large island to the west. Tromsøya is connected to the mainland by the Tromsø
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Bridge and the Tromsøysund Tunnel, and to the island of Kvaløya by the
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Sandnessund Bridge. Tromsø Airport connects the city to many destinations
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in Europe. The city is warmer than most other places located on the same
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latitude, due to the warming effect of the Gulf Stream.""",
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"""The city centre of Tromsø contains the highest number of old wooden
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houses in Northern Norway, the oldest house dating from 1789. The Arctic
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Cathedral, a modern church from 1965, is probably the most famous landmark
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in Tromsø. The city is a cultural centre for its region, with several
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festivals taking place in the summer. Some of Norway's best-known
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musicians, Torbjørn Brundtland and Svein Berge of the electronica duo
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Röyksopp and Lene Marlin grew up and started their careers in Tromsø.
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Noted electronic musician Geir Jenssen also hails from Tromsø.""",
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]
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desc = summarize_paragraphs(example_paras, min_size=200, max_size=500)
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self.assertEqual(
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desc,
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"Tromsø (Norwegian pronunciation: [ˈtrʊmsœ] ( listen); Northern Sami:"
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" Romsa; Finnish: Tromssa[2] Kven: Tromssa) is a city and municipality in"
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" Troms county, Norway. The administrative centre of the municipality is"
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" the city of Tromsø. Outside of Norway, Tromso and Tromsö are"
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" alternative spellings of the city.Tromsø is considered the northernmost"
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" city in the world with a population above 50,000. The most populous town"
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" north of it is Alta, Norway, with a population of 14,272 (2013).",
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)
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desc = summarize_paragraphs(example_paras[1:], min_size=200, max_size=500)
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self.assertEqual(
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desc,
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"Tromsø lies in Northern Norway. The municipality has a population of"
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" (2015) 72,066, but with an annual influx of students it has over 75,000"
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" most of the year. It is the largest urban area in Northern Norway and the"
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" third largest north of the Arctic Circle (following Murmansk and Norilsk)."
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" Most of Tromsø, including the city centre, is located on the island of"
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" Tromsøya, 350 kilometres (217 mi) north of the Arctic Circle. In 2012,"
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" Tromsøya had a population of 36,088. Substantial parts of the urban…",
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)
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def test_short_summarize(self) -> None:
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example_paras = [
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"Tromsø (Norwegian pronunciation: [ˈtrʊmsœ] ( listen); Northern Sami:"
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" Romsa; Finnish: Tromssa[2] Kven: Tromssa) is a city and municipality in"
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" Troms county, Norway.",
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"Tromsø lies in Northern Norway. The municipality has a population of"
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" (2015) 72,066, but with an annual influx of students it has over 75,000"
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" most of the year.",
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"The city centre of Tromsø contains the highest number of old wooden"
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" houses in Northern Norway, the oldest house dating from 1789. The Arctic"
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" Cathedral, a modern church from 1965, is probably the most famous landmark"
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" in Tromsø.",
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]
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desc = summarize_paragraphs(example_paras, min_size=200, max_size=500)
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self.assertEqual(
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desc,
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"Tromsø (Norwegian pronunciation: [ˈtrʊmsœ] ( listen); Northern Sami:"
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" Romsa; Finnish: Tromssa[2] Kven: Tromssa) is a city and municipality in"
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" Troms county, Norway.\n"
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"\n"
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"Tromsø lies in Northern Norway. The municipality has a population of"
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" (2015) 72,066, but with an annual influx of students it has over 75,000"
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" most of the year.",
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)
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def test_small_then_large_summarize(self) -> None:
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example_paras = [
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"Tromsø (Norwegian pronunciation: [ˈtrʊmsœ] ( listen); Northern Sami:"
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" Romsa; Finnish: Tromssa[2] Kven: Tromssa) is a city and municipality in"
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" Troms county, Norway.",
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"Tromsø lies in Northern Norway. The municipality has a population of"
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" (2015) 72,066, but with an annual influx of students it has over 75,000"
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" most of the year."
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" The city centre of Tromsø contains the highest number of old wooden"
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" houses in Northern Norway, the oldest house dating from 1789. The Arctic"
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" Cathedral, a modern church from 1965, is probably the most famous landmark"
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" in Tromsø.",
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]
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desc = summarize_paragraphs(example_paras, min_size=200, max_size=500)
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self.assertEqual(
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desc,
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"Tromsø (Norwegian pronunciation: [ˈtrʊmsœ] ( listen); Northern Sami:"
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" Romsa; Finnish: Tromssa[2] Kven: Tromssa) is a city and municipality in"
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" Troms county, Norway.\n"
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"\n"
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"Tromsø lies in Northern Norway. The municipality has a population of"
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" (2015) 72,066, but with an annual influx of students it has over 75,000"
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" most of the year. The city centre of Tromsø contains the highest number"
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" of old wooden houses in Northern Norway, the oldest house dating from"
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" 1789. The Arctic Cathedral, a modern church from…",
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)
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class OpenGraphFromHtmlTestCase(unittest.TestCase):
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if not lxml:
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skip = "url preview feature requires lxml"
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def test_simple(self) -> None:
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html = b"""
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<html>
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<head><title>Foo</title></head>
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<body>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
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def test_comment(self) -> None:
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html = b"""
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<html>
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<head><title>Foo</title></head>
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<body>
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<!-- HTML comment -->
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
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def test_comment2(self) -> None:
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html = b"""
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<html>
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<head><title>Foo</title></head>
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<body>
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Some text.
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<!-- HTML comment -->
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Some more text.
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<p>Text</p>
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More text
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(
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og,
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{
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"og:title": "Foo",
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"og:description": "Some text.\n\nSome more text.\n\nText\n\nMore text",
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},
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)
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def test_script(self) -> None:
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html = b"""
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<html>
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<head><title>Foo</title></head>
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<body>
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<script> (function() {})() </script>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
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def test_missing_title(self) -> None:
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html = b"""
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<html>
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<body>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": None, "og:description": "Some text."})
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# Another variant is a title with no content.
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html = b"""
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<html>
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<head><title></title></head>
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<body>
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<h1>Title</h1>
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Title", "og:description": "Title"})
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def test_h1_as_title(self) -> None:
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html = b"""
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<html>
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<meta property="og:description" content="Some text."/>
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<body>
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<h1>Title</h1>
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Title", "og:description": "Some text."})
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def test_empty_description(self) -> None:
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"""Description tags with empty content should be ignored."""
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html = b"""
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<html>
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<meta property="og:description" content=""/>
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<meta property="og:description"/>
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<meta name="description" content=""/>
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<meta name="description"/>
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<meta name="description" content="Finally!"/>
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<body>
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<h1>Title</h1>
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Title", "og:description": "Finally!"})
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def test_missing_title_and_broken_h1(self) -> None:
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html = b"""
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<html>
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<body>
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<h1><a href="foo"/></h1>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": None, "og:description": "Some text."})
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def test_empty(self) -> None:
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"""Test a body with no data in it."""
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html = b""
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tree = decode_body(html, "http://example.com/test.html")
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self.assertIsNone(tree)
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def test_no_tree(self) -> None:
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"""A valid body with no tree in it."""
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html = b"\x00"
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tree = decode_body(html, "http://example.com/test.html")
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self.assertIsNone(tree)
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def test_xml(self) -> None:
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"""Test decoding XML and ensure it works properly."""
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# Note that the strip() call is important to ensure the xml tag starts
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# at the initial byte.
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html = b"""
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head><title>Foo</title></head><body>Some text.</body></html>
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""".strip()
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
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def test_invalid_encoding(self) -> None:
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"""An invalid character encoding should be ignored and treated as UTF-8, if possible."""
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html = b"""
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<html>
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<head><title>Foo</title></head>
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<body>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html", "invalid-encoding")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "Foo", "og:description": "Some text."})
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def test_invalid_encoding2(self) -> None:
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"""A body which doesn't match the sent character encoding."""
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# Note that this contains an invalid UTF-8 sequence in the title.
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html = b"""
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<html>
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<head><title>\xff\xff Foo</title></head>
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<body>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "ÿÿ Foo", "og:description": "Some text."})
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def test_windows_1252(self) -> None:
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"""A body which uses cp1252, but doesn't declare that."""
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html = b"""
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<html>
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<head><title>\xf3</title></head>
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<body>
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Some text.
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</body>
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(og, {"og:title": "ó", "og:description": "Some text."})
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def test_twitter_tag(self) -> None:
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"""Twitter card tags should be used if nothing else is available."""
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html = b"""
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<html>
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<meta name="twitter:card" content="summary">
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<meta name="twitter:description" content="Description">
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<meta name="twitter:site" content="@matrixdotorg">
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(
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og,
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{
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"og:title": None,
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"og:description": "Description",
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"og:site_name": "@matrixdotorg",
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},
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)
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# But they shouldn't override Open Graph values.
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html = b"""
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<html>
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<meta name="twitter:card" content="summary">
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<meta name="twitter:description" content="Description">
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<meta property="og:description" content="Real Description">
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<meta name="twitter:site" content="@matrixdotorg">
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<meta property="og:site_name" content="matrix.org">
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</html>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(
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og,
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{
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"og:title": None,
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"og:description": "Real Description",
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"og:site_name": "matrix.org",
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},
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)
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def test_nested_nodes(self) -> None:
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"""A body with some nested nodes. Tests that we iterate over children
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in the right order (and don't reverse the order of the text)."""
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html = b"""
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<a href="somewhere">Welcome <b>the bold <u>and underlined text <svg>
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with a cheeky SVG</svg></u> and <strong>some</strong> tail text</b></a>
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"""
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tree = decode_body(html, "http://example.com/test.html")
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assert tree is not None
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og = parse_html_to_open_graph(tree)
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self.assertEqual(
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og,
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{
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"og:title": None,
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"og:description": "Welcome\n\nthe bold\n\nand underlined text\n\nand\n\nsome\n\ntail text",
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},
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)
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class MediaEncodingTestCase(unittest.TestCase):
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def test_meta_charset(self) -> None:
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"""A character encoding is found via the meta tag."""
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encodings = _get_html_media_encodings(
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b"""
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<html>
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<head><meta charset="ascii">
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</head>
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</html>
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""",
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"text/html",
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)
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self.assertEqual(list(encodings), ["ascii", "utf-8", "cp1252"])
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# A less well-formed version.
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encodings = _get_html_media_encodings(
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b"""
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<html>
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<head>< meta charset = ascii>
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</head>
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</html>
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""",
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"text/html",
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)
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self.assertEqual(list(encodings), ["ascii", "utf-8", "cp1252"])
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def test_meta_charset_underscores(self) -> None:
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"""A character encoding contains underscore."""
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encodings = _get_html_media_encodings(
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b"""
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<html>
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<head><meta charset="Shift_JIS">
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</head>
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</html>
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""",
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"text/html",
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)
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self.assertEqual(list(encodings), ["shift_jis", "utf-8", "cp1252"])
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def test_xml_encoding(self) -> None:
|
||
"""A character encoding is found via the meta tag."""
|
||
encodings = _get_html_media_encodings(
|
||
b"""
|
||
<?xml version="1.0" encoding="ascii"?>
|
||
<html>
|
||
</html>
|
||
""",
|
||
"text/html",
|
||
)
|
||
self.assertEqual(list(encodings), ["ascii", "utf-8", "cp1252"])
|
||
|
||
def test_meta_xml_encoding(self) -> None:
|
||
"""Meta tags take precedence over XML encoding."""
|
||
encodings = _get_html_media_encodings(
|
||
b"""
|
||
<?xml version="1.0" encoding="ascii"?>
|
||
<html>
|
||
<head><meta charset="UTF-16">
|
||
</head>
|
||
</html>
|
||
""",
|
||
"text/html",
|
||
)
|
||
self.assertEqual(list(encodings), ["utf-16", "ascii", "utf-8", "cp1252"])
|
||
|
||
def test_content_type(self) -> None:
|
||
"""A character encoding is found via the Content-Type header."""
|
||
# Test a few variations of the header.
|
||
headers = (
|
||
'text/html; charset="ascii";',
|
||
"text/html;charset=ascii;",
|
||
'text/html; charset="ascii"',
|
||
"text/html; charset=ascii",
|
||
'text/html; charset="ascii;',
|
||
'text/html; charset=ascii";',
|
||
)
|
||
for header in headers:
|
||
encodings = _get_html_media_encodings(b"", header)
|
||
self.assertEqual(list(encodings), ["ascii", "utf-8", "cp1252"])
|
||
|
||
def test_fallback(self) -> None:
|
||
"""A character encoding cannot be found in the body or header."""
|
||
encodings = _get_html_media_encodings(b"", "text/html")
|
||
self.assertEqual(list(encodings), ["utf-8", "cp1252"])
|
||
|
||
def test_duplicates(self) -> None:
|
||
"""Ensure each encoding is only attempted once."""
|
||
encodings = _get_html_media_encodings(
|
||
b"""
|
||
<?xml version="1.0" encoding="utf8"?>
|
||
<html>
|
||
<head><meta charset="UTF-8">
|
||
</head>
|
||
</html>
|
||
""",
|
||
'text/html; charset="UTF_8"',
|
||
)
|
||
self.assertEqual(list(encodings), ["utf-8", "cp1252"])
|
||
|
||
def test_unknown_invalid(self) -> None:
|
||
"""A character encoding should be ignored if it is unknown or invalid."""
|
||
encodings = _get_html_media_encodings(
|
||
b"""
|
||
<html>
|
||
<head><meta charset="invalid">
|
||
</head>
|
||
</html>
|
||
""",
|
||
'text/html; charset="invalid"',
|
||
)
|
||
self.assertEqual(list(encodings), ["utf-8", "cp1252"])
|