mirror of https://github.com/scrapy/scrapy.git
965 lines
37 KiB
Python
965 lines
37 KiB
Python
import pickle
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import re
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import unittest
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from packaging.version import Version
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from pytest import mark
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from w3lib import __version__ as w3lib_version
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from scrapy.http import HtmlResponse, XmlResponse
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from scrapy.link import Link
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from scrapy.linkextractors.lxmlhtml import LxmlLinkExtractor
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from tests import get_testdata
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# a hack to skip base class tests in pytest
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class Base:
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class LinkExtractorTestCase(unittest.TestCase):
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extractor_cls = None
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def setUp(self):
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body = get_testdata("link_extractor", "linkextractor.html")
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self.response = HtmlResponse(url="http://example.com/index", body=body)
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def test_urls_type(self):
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"""Test that the resulting urls are str objects"""
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lx = self.extractor_cls()
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self.assertTrue(
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all(
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isinstance(link.url, str)
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for link in lx.extract_links(self.response)
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)
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)
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def test_extract_all_links(self):
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lx = self.extractor_cls()
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page4_url = "http://example.com/page%204.html"
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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Link(
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url="http://example.com/sample3.html#foo",
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text="sample 3 repetition with fragment",
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),
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Link(url="http://www.google.com/something", text=""),
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Link(url="http://example.com/innertag.html", text="inner tag"),
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Link(url=page4_url, text="href with whitespaces"),
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],
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)
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def test_extract_filter_allow(self):
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lx = self.extractor_cls(allow=("sample",))
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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Link(
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url="http://example.com/sample3.html#foo",
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text="sample 3 repetition with fragment",
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),
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],
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)
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def test_extract_filter_allow_with_duplicates(self):
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lx = self.extractor_cls(allow=("sample",), unique=False)
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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Link(
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url="http://example.com/sample3.html",
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text="sample 3 repetition",
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),
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Link(
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url="http://example.com/sample3.html",
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text="sample 3 repetition",
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),
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Link(
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url="http://example.com/sample3.html#foo",
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text="sample 3 repetition with fragment",
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),
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],
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)
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def test_extract_filter_allow_with_duplicates_canonicalize(self):
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lx = self.extractor_cls(allow=("sample",), unique=False, canonicalize=True)
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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Link(
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url="http://example.com/sample3.html",
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text="sample 3 repetition",
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),
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Link(
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url="http://example.com/sample3.html",
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text="sample 3 repetition",
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),
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Link(
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url="http://example.com/sample3.html",
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text="sample 3 repetition with fragment",
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),
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],
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)
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def test_extract_filter_allow_no_duplicates_canonicalize(self):
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lx = self.extractor_cls(allow=("sample",), unique=True, canonicalize=True)
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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],
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)
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def test_extract_filter_allow_and_deny(self):
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lx = self.extractor_cls(allow=("sample",), deny=("3",))
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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],
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)
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def test_extract_filter_allowed_domains(self):
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lx = self.extractor_cls(allow_domains=("google.com",))
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://www.google.com/something", text=""),
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],
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)
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def test_extraction_using_single_values(self):
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"""Test the extractor's behaviour among different situations"""
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lx = self.extractor_cls(allow="sample")
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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Link(
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url="http://example.com/sample3.html#foo",
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text="sample 3 repetition with fragment",
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),
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],
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)
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lx = self.extractor_cls(allow="sample", deny="3")
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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],
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)
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lx = self.extractor_cls(allow_domains="google.com")
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://www.google.com/something", text=""),
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],
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)
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lx = self.extractor_cls(deny_domains="example.com")
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://www.google.com/something", text=""),
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],
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)
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def test_nofollow(self):
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'''Test the extractor's behaviour for links with rel="nofollow"'''
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html = b"""<html><head><title>Page title<title>
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<body>
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<div class='links'>
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<p><a href="/about.html">About us</a></p>
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</div>
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<div>
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<p><a href="/follow.html">Follow this link</a></p>
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</div>
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<div>
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<p><a href="/nofollow.html" rel="nofollow">Dont follow this one</a></p>
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</div>
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<div>
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<p><a href="/nofollow2.html" rel="blah">Choose to follow or not</a></p>
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</div>
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<div>
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<p><a href="http://google.com/something" rel="external nofollow">External link not to follow</a></p>
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</div>
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</body></html>"""
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response = HtmlResponse("http://example.org/somepage/index.html", body=html)
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lx = self.extractor_cls()
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self.assertEqual(
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lx.extract_links(response),
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[
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Link(url="http://example.org/about.html", text="About us"),
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Link(url="http://example.org/follow.html", text="Follow this link"),
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Link(
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url="http://example.org/nofollow.html",
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text="Dont follow this one",
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nofollow=True,
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),
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Link(
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url="http://example.org/nofollow2.html",
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text="Choose to follow or not",
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),
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Link(
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url="http://google.com/something",
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text="External link not to follow",
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nofollow=True,
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),
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],
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)
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def test_matches(self):
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url1 = "http://lotsofstuff.com/stuff1/index"
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url2 = "http://evenmorestuff.com/uglystuff/index"
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lx = self.extractor_cls(allow=(r"stuff1",))
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self.assertEqual(lx.matches(url1), True)
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self.assertEqual(lx.matches(url2), False)
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lx = self.extractor_cls(deny=(r"uglystuff",))
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self.assertEqual(lx.matches(url1), True)
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self.assertEqual(lx.matches(url2), False)
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lx = self.extractor_cls(allow_domains=("evenmorestuff.com",))
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self.assertEqual(lx.matches(url1), False)
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self.assertEqual(lx.matches(url2), True)
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lx = self.extractor_cls(deny_domains=("lotsofstuff.com",))
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self.assertEqual(lx.matches(url1), False)
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self.assertEqual(lx.matches(url2), True)
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lx = self.extractor_cls(
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allow=["blah1"],
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deny=["blah2"],
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allow_domains=["blah1.com"],
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deny_domains=["blah2.com"],
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)
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self.assertEqual(lx.matches("http://blah1.com/blah1"), True)
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self.assertEqual(lx.matches("http://blah1.com/blah2"), False)
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self.assertEqual(lx.matches("http://blah2.com/blah1"), False)
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self.assertEqual(lx.matches("http://blah2.com/blah2"), False)
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def test_restrict_xpaths(self):
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lx = self.extractor_cls(restrict_xpaths=('//div[@id="subwrapper"]',))
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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],
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)
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def test_restrict_xpaths_encoding(self):
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"""Test restrict_xpaths with encodings"""
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html = b"""<html><head><title>Page title<title>
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<body><p><a href="item/12.html">Item 12</a></p>
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<div class='links'>
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<p><a href="/about.html">About us\xa3</a></p>
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</div>
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<div>
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<p><a href="/nofollow.html">This shouldn't be followed</a></p>
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</div>
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</body></html>"""
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response = HtmlResponse(
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"http://example.org/somepage/index.html",
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body=html,
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encoding="windows-1252",
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)
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lx = self.extractor_cls(restrict_xpaths="//div[@class='links']")
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self.assertEqual(
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lx.extract_links(response),
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[Link(url="http://example.org/about.html", text="About us\xa3")],
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)
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def test_restrict_xpaths_with_html_entities(self):
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html = b'<html><body><p><a href="/♥/you?c=€">text</a></p></body></html>'
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response = HtmlResponse(
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"http://example.org/somepage/index.html",
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body=html,
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encoding="iso8859-15",
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)
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links = self.extractor_cls(restrict_xpaths="//p").extract_links(response)
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self.assertEqual(
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links, [Link(url="http://example.org/%E2%99%A5/you?c=%A4", text="text")]
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)
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def test_restrict_xpaths_concat_in_handle_data(self):
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"""html entities cause SGMLParser to call handle_data hook twice"""
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body = b"""<html><body><div><a href="/foo">>\xbe\xa9<\xb6\xab</a></body></html>"""
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response = HtmlResponse("http://example.org", body=body, encoding="gb18030")
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lx = self.extractor_cls(restrict_xpaths="//div")
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self.assertEqual(
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lx.extract_links(response),
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[
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Link(
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url="http://example.org/foo",
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text=">\u4eac<\u4e1c",
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fragment="",
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nofollow=False,
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)
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],
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)
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def test_restrict_css(self):
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lx = self.extractor_cls(restrict_css=("#subwrapper a",))
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self.assertEqual(
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lx.extract_links(self.response),
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[Link(url="http://example.com/sample2.html", text="sample 2")],
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)
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def test_restrict_css_and_restrict_xpaths_together(self):
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lx = self.extractor_cls(
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restrict_xpaths=('//div[@id="subwrapper"]',),
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restrict_css=("#subwrapper + a",),
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)
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self.assertEqual(
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[link for link in lx.extract_links(self.response)],
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[
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Link(url="http://example.com/sample1.html", text=""),
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Link(url="http://example.com/sample2.html", text="sample 2"),
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Link(url="http://example.com/sample3.html", text="sample 3 text"),
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],
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)
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def test_area_tag_with_unicode_present(self):
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body = b"""<html><body>\xbe\xa9<map><area href="http://example.org/foo" /></map></body></html>"""
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response = HtmlResponse("http://example.org", body=body, encoding="utf-8")
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lx = self.extractor_cls()
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lx.extract_links(response)
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lx.extract_links(response)
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lx.extract_links(response)
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self.assertEqual(
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lx.extract_links(response),
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[
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Link(
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url="http://example.org/foo",
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text="",
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fragment="",
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nofollow=False,
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)
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],
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)
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def test_encoded_url(self):
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body = b"""<html><body><div><a href="?page=2">BinB</a></body></html>"""
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response = HtmlResponse(
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"http://known.fm/AC%2FDC/", body=body, encoding="utf8"
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)
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lx = self.extractor_cls()
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self.assertEqual(
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lx.extract_links(response),
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[
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Link(
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url="http://known.fm/AC%2FDC/?page=2",
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text="BinB",
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fragment="",
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nofollow=False,
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),
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],
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)
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|
|
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def test_encoded_url_in_restricted_xpath(self):
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body = b"""<html><body><div><a href="?page=2">BinB</a></body></html>"""
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response = HtmlResponse(
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"http://known.fm/AC%2FDC/", body=body, encoding="utf8"
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)
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lx = self.extractor_cls(restrict_xpaths="//div")
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self.assertEqual(
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lx.extract_links(response),
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[
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Link(
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url="http://known.fm/AC%2FDC/?page=2",
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text="BinB",
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fragment="",
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nofollow=False,
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),
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],
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)
|
|
|
|
def test_ignored_extensions(self):
|
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# jpg is ignored by default
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html = b"""<a href="page.html">asd</a> and <a href="photo.jpg">"""
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response = HtmlResponse("http://example.org/", body=html)
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lx = self.extractor_cls()
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self.assertEqual(
|
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lx.extract_links(response),
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[
|
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Link(url="http://example.org/page.html", text="asd"),
|
|
],
|
|
)
|
|
|
|
# override denied extensions
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lx = self.extractor_cls(deny_extensions=["html"])
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self.assertEqual(
|
|
lx.extract_links(response),
|
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[
|
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Link(url="http://example.org/photo.jpg"),
|
|
],
|
|
)
|
|
|
|
def test_process_value(self):
|
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"""Test restrict_xpaths with encodings"""
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html = b"""
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<a href="javascript:goToPage('../other/page.html','photo','width=600,height=540,scrollbars'); return false">Text</a>
|
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<a href="/about.html">About us</a>
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"""
|
|
response = HtmlResponse(
|
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"http://example.org/somepage/index.html",
|
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body=html,
|
|
encoding="windows-1252",
|
|
)
|
|
|
|
def process_value(value):
|
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m = re.search(r"javascript:goToPage\('(.*?)'", value)
|
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if m:
|
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return m.group(1)
|
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|
|
lx = self.extractor_cls(process_value=process_value)
|
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self.assertEqual(
|
|
lx.extract_links(response),
|
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[Link(url="http://example.org/other/page.html", text="Text")],
|
|
)
|
|
|
|
def test_base_url_with_restrict_xpaths(self):
|
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html = b"""<html><head><title>Page title<title><base href="http://otherdomain.com/base/" />
|
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<body><p><a href="item/12.html">Item 12</a></p>
|
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</body></html>"""
|
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response = HtmlResponse("http://example.org/somepage/index.html", body=html)
|
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lx = self.extractor_cls(restrict_xpaths="//p")
|
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self.assertEqual(
|
|
lx.extract_links(response),
|
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[Link(url="http://otherdomain.com/base/item/12.html", text="Item 12")],
|
|
)
|
|
|
|
def test_attrs(self):
|
|
lx = self.extractor_cls(attrs="href")
|
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page4_url = "http://example.com/page%204.html"
|
|
|
|
self.assertEqual(
|
|
lx.extract_links(self.response),
|
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[
|
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Link(url="http://example.com/sample1.html", text=""),
|
|
Link(url="http://example.com/sample2.html", text="sample 2"),
|
|
Link(url="http://example.com/sample3.html", text="sample 3 text"),
|
|
Link(
|
|
url="http://example.com/sample3.html#foo",
|
|
text="sample 3 repetition with fragment",
|
|
),
|
|
Link(url="http://www.google.com/something", text=""),
|
|
Link(url="http://example.com/innertag.html", text="inner tag"),
|
|
Link(url=page4_url, text="href with whitespaces"),
|
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],
|
|
)
|
|
|
|
lx = self.extractor_cls(
|
|
attrs=("href", "src"), tags=("a", "area", "img"), deny_extensions=()
|
|
)
|
|
self.assertEqual(
|
|
lx.extract_links(self.response),
|
|
[
|
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Link(url="http://example.com/sample1.html", text=""),
|
|
Link(url="http://example.com/sample2.html", text="sample 2"),
|
|
Link(url="http://example.com/sample2.jpg", text=""),
|
|
Link(url="http://example.com/sample3.html", text="sample 3 text"),
|
|
Link(
|
|
url="http://example.com/sample3.html#foo",
|
|
text="sample 3 repetition with fragment",
|
|
),
|
|
Link(url="http://www.google.com/something", text=""),
|
|
Link(url="http://example.com/innertag.html", text="inner tag"),
|
|
Link(url=page4_url, text="href with whitespaces"),
|
|
],
|
|
)
|
|
|
|
lx = self.extractor_cls(attrs=None)
|
|
self.assertEqual(lx.extract_links(self.response), [])
|
|
|
|
def test_tags(self):
|
|
html = (
|
|
b'<html><area href="sample1.html"></area>'
|
|
b'<a href="sample2.html">sample 2</a><img src="sample2.jpg"/></html>'
|
|
)
|
|
response = HtmlResponse("http://example.com/index.html", body=html)
|
|
|
|
lx = self.extractor_cls(tags=None)
|
|
self.assertEqual(lx.extract_links(response), [])
|
|
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(url="http://example.com/sample1.html", text=""),
|
|
Link(url="http://example.com/sample2.html", text="sample 2"),
|
|
],
|
|
)
|
|
|
|
lx = self.extractor_cls(tags="area")
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(url="http://example.com/sample1.html", text=""),
|
|
],
|
|
)
|
|
|
|
lx = self.extractor_cls(tags="a")
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(url="http://example.com/sample2.html", text="sample 2"),
|
|
],
|
|
)
|
|
|
|
lx = self.extractor_cls(
|
|
tags=("a", "img"), attrs=("href", "src"), deny_extensions=()
|
|
)
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(url="http://example.com/sample2.html", text="sample 2"),
|
|
Link(url="http://example.com/sample2.jpg", text=""),
|
|
],
|
|
)
|
|
|
|
def test_tags_attrs(self):
|
|
html = b"""
|
|
<html><body>
|
|
<div id="item1" data-url="get?id=1"><a href="#">Item 1</a></div>
|
|
<div id="item2" data-url="get?id=2"><a href="#">Item 2</a></div>
|
|
</body></html>
|
|
"""
|
|
response = HtmlResponse("http://example.com/index.html", body=html)
|
|
|
|
lx = self.extractor_cls(tags="div", attrs="data-url")
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(
|
|
url="http://example.com/get?id=1",
|
|
text="Item 1",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.com/get?id=2",
|
|
text="Item 2",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
|
|
lx = self.extractor_cls(tags=("div",), attrs=("data-url",))
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(
|
|
url="http://example.com/get?id=1",
|
|
text="Item 1",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.com/get?id=2",
|
|
text="Item 2",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
|
|
def test_xhtml(self):
|
|
xhtml = b"""
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
|
|
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
|
<head>
|
|
<title>XHTML document title</title>
|
|
</head>
|
|
<body>
|
|
<div class='links'>
|
|
<p><a href="/about.html">About us</a></p>
|
|
</div>
|
|
<div>
|
|
<p><a href="/follow.html">Follow this link</a></p>
|
|
</div>
|
|
<div>
|
|
<p><a href="/nofollow.html" rel="nofollow">Dont follow this one</a></p>
|
|
</div>
|
|
<div>
|
|
<p><a href="/nofollow2.html" rel="blah">Choose to follow or not</a></p>
|
|
</div>
|
|
<div>
|
|
<p><a href="http://google.com/something" rel="external nofollow">External link not to follow</a></p>
|
|
</div>
|
|
</body>
|
|
</html>
|
|
"""
|
|
|
|
response = HtmlResponse("http://example.com/index.xhtml", body=xhtml)
|
|
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(
|
|
url="http://example.com/about.html",
|
|
text="About us",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.com/follow.html",
|
|
text="Follow this link",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.com/nofollow.html",
|
|
text="Dont follow this one",
|
|
fragment="",
|
|
nofollow=True,
|
|
),
|
|
Link(
|
|
url="http://example.com/nofollow2.html",
|
|
text="Choose to follow or not",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://google.com/something",
|
|
text="External link not to follow",
|
|
nofollow=True,
|
|
),
|
|
],
|
|
)
|
|
|
|
response = XmlResponse("http://example.com/index.xhtml", body=xhtml)
|
|
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(
|
|
url="http://example.com/about.html",
|
|
text="About us",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.com/follow.html",
|
|
text="Follow this link",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.com/nofollow.html",
|
|
text="Dont follow this one",
|
|
fragment="",
|
|
nofollow=True,
|
|
),
|
|
Link(
|
|
url="http://example.com/nofollow2.html",
|
|
text="Choose to follow or not",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://google.com/something",
|
|
text="External link not to follow",
|
|
nofollow=True,
|
|
),
|
|
],
|
|
)
|
|
|
|
def test_link_wrong_href(self):
|
|
html = b"""
|
|
<a href="http://example.org/item1.html">Item 1</a>
|
|
<a href="http://[example.org/item2.html">Item 2</a>
|
|
<a href="http://example.org/item3.html">Item 3</a>
|
|
"""
|
|
response = HtmlResponse("http://example.org/index.html", body=html)
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
[link for link in lx.extract_links(response)],
|
|
[
|
|
Link(
|
|
url="http://example.org/item1.html",
|
|
text="Item 1",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.org/item3.html",
|
|
text="Item 3",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
|
|
def test_ftp_links(self):
|
|
body = b"""
|
|
<html><body>
|
|
<div><a href="ftp://www.external.com/">An Item</a></div>
|
|
</body></html>"""
|
|
response = HtmlResponse(
|
|
"http://www.example.com/index.html", body=body, encoding="utf8"
|
|
)
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
lx.extract_links(response),
|
|
[
|
|
Link(
|
|
url="ftp://www.external.com/",
|
|
text="An Item",
|
|
fragment="",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
|
|
def test_pickle_extractor(self):
|
|
lx = self.extractor_cls()
|
|
self.assertIsInstance(pickle.loads(pickle.dumps(lx)), self.extractor_cls)
|
|
|
|
def test_link_extractor_aggregation(self):
|
|
"""When a parameter like restrict_css is used, the underlying
|
|
implementation calls its internal link extractor once per selector
|
|
matching the specified restrictions, and then aggregates the
|
|
extracted links.
|
|
|
|
Test that aggregation respects the unique and canonicalize
|
|
parameters.
|
|
"""
|
|
# unique=True (default), canonicalize=False (default)
|
|
lx = self.extractor_cls(restrict_css=("div",))
|
|
response = HtmlResponse(
|
|
"https://example.com",
|
|
body=b"""
|
|
<div>
|
|
<a href="/a">a1</a>
|
|
<a href="/b?a=1&b=2">b1</a>
|
|
</div>
|
|
<div>
|
|
<a href="/a">a2</a>
|
|
<a href="/b?b=2&a=1">b2</a>
|
|
</div>
|
|
""",
|
|
)
|
|
actual = lx.extract_links(response)
|
|
self.assertEqual(
|
|
actual,
|
|
[
|
|
Link(url="https://example.com/a", text="a1"),
|
|
Link(url="https://example.com/b?a=1&b=2", text="b1"),
|
|
Link(url="https://example.com/b?b=2&a=1", text="b2"),
|
|
],
|
|
)
|
|
|
|
# unique=True (default), canonicalize=True
|
|
lx = self.extractor_cls(restrict_css=("div",), canonicalize=True)
|
|
response = HtmlResponse(
|
|
"https://example.com",
|
|
body=b"""
|
|
<div>
|
|
<a href="/a">a1</a>
|
|
<a href="/b?a=1&b=2">b1</a>
|
|
</div>
|
|
<div>
|
|
<a href="/a">a2</a>
|
|
<a href="/b?b=2&a=1">b2</a>
|
|
</div>
|
|
""",
|
|
)
|
|
actual = lx.extract_links(response)
|
|
self.assertEqual(
|
|
actual,
|
|
[
|
|
Link(url="https://example.com/a", text="a1"),
|
|
Link(url="https://example.com/b?a=1&b=2", text="b1"),
|
|
],
|
|
)
|
|
|
|
# unique=False, canonicalize=False (default)
|
|
lx = self.extractor_cls(restrict_css=("div",), unique=False)
|
|
response = HtmlResponse(
|
|
"https://example.com",
|
|
body=b"""
|
|
<div>
|
|
<a href="/a">a1</a>
|
|
<a href="/b?a=1&b=2">b1</a>
|
|
</div>
|
|
<div>
|
|
<a href="/a">a2</a>
|
|
<a href="/b?b=2&a=1">b2</a>
|
|
</div>
|
|
""",
|
|
)
|
|
actual = lx.extract_links(response)
|
|
self.assertEqual(
|
|
actual,
|
|
[
|
|
Link(url="https://example.com/a", text="a1"),
|
|
Link(url="https://example.com/b?a=1&b=2", text="b1"),
|
|
Link(url="https://example.com/a", text="a2"),
|
|
Link(url="https://example.com/b?b=2&a=1", text="b2"),
|
|
],
|
|
)
|
|
|
|
# unique=False, canonicalize=True
|
|
lx = self.extractor_cls(
|
|
restrict_css=("div",), unique=False, canonicalize=True
|
|
)
|
|
response = HtmlResponse(
|
|
"https://example.com",
|
|
body=b"""
|
|
<div>
|
|
<a href="/a">a1</a>
|
|
<a href="/b?a=1&b=2">b1</a>
|
|
</div>
|
|
<div>
|
|
<a href="/a">a2</a>
|
|
<a href="/b?b=2&a=1">b2</a>
|
|
</div>
|
|
""",
|
|
)
|
|
actual = lx.extract_links(response)
|
|
self.assertEqual(
|
|
actual,
|
|
[
|
|
Link(url="https://example.com/a", text="a1"),
|
|
Link(url="https://example.com/b?a=1&b=2", text="b1"),
|
|
Link(url="https://example.com/a", text="a2"),
|
|
Link(url="https://example.com/b?a=1&b=2", text="b2"),
|
|
],
|
|
)
|
|
|
|
|
|
class LxmlLinkExtractorTestCase(Base.LinkExtractorTestCase):
|
|
extractor_cls = LxmlLinkExtractor
|
|
|
|
def test_link_wrong_href(self):
|
|
html = b"""
|
|
<a href="http://example.org/item1.html">Item 1</a>
|
|
<a href="http://[example.org/item2.html">Item 2</a>
|
|
<a href="http://example.org/item3.html">Item 3</a>
|
|
"""
|
|
response = HtmlResponse("http://example.org/index.html", body=html)
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
[link for link in lx.extract_links(response)],
|
|
[
|
|
Link(
|
|
url="http://example.org/item1.html", text="Item 1", nofollow=False
|
|
),
|
|
Link(
|
|
url="http://example.org/item3.html", text="Item 3", nofollow=False
|
|
),
|
|
],
|
|
)
|
|
|
|
def test_link_restrict_text(self):
|
|
html = b"""
|
|
<a href="http://example.org/item1.html">Pic of a cat</a>
|
|
<a href="http://example.org/item2.html">Pic of a dog</a>
|
|
<a href="http://example.org/item3.html">Pic of a cow</a>
|
|
"""
|
|
response = HtmlResponse("http://example.org/index.html", body=html)
|
|
# Simple text inclusion test
|
|
lx = self.extractor_cls(restrict_text="dog")
|
|
self.assertEqual(
|
|
[link for link in lx.extract_links(response)],
|
|
[
|
|
Link(
|
|
url="http://example.org/item2.html",
|
|
text="Pic of a dog",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
# Unique regex test
|
|
lx = self.extractor_cls(restrict_text=r"of.*dog")
|
|
self.assertEqual(
|
|
[link for link in lx.extract_links(response)],
|
|
[
|
|
Link(
|
|
url="http://example.org/item2.html",
|
|
text="Pic of a dog",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
# Multiple regex test
|
|
lx = self.extractor_cls(restrict_text=[r"of.*dog", r"of.*cat"])
|
|
self.assertEqual(
|
|
[link for link in lx.extract_links(response)],
|
|
[
|
|
Link(
|
|
url="http://example.org/item1.html",
|
|
text="Pic of a cat",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.org/item2.html",
|
|
text="Pic of a dog",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|
|
|
|
def test_restrict_xpaths_with_html_entities(self):
|
|
super().test_restrict_xpaths_with_html_entities()
|
|
|
|
@mark.skipif(
|
|
Version(w3lib_version) < Version("2.0.0"),
|
|
reason=(
|
|
"Before w3lib 2.0.0, w3lib.url.safe_url_string would not complain "
|
|
"about an invalid port value."
|
|
),
|
|
)
|
|
def test_skip_bad_links(self):
|
|
html = b"""
|
|
<a href="http://example.org:non-port">Why would you do this?</a>
|
|
<a href="http://example.org/item2.html">Good Link</a>
|
|
<a href="http://example.org/item3.html">Good Link 2</a>
|
|
"""
|
|
response = HtmlResponse("http://example.org/index.html", body=html)
|
|
lx = self.extractor_cls()
|
|
self.assertEqual(
|
|
[link for link in lx.extract_links(response)],
|
|
[
|
|
Link(
|
|
url="http://example.org/item2.html",
|
|
text="Good Link",
|
|
nofollow=False,
|
|
),
|
|
Link(
|
|
url="http://example.org/item3.html",
|
|
text="Good Link 2",
|
|
nofollow=False,
|
|
),
|
|
],
|
|
)
|