mirror of https://github.com/scrapy/scrapy.git
234 lines
15 KiB
Python
234 lines
15 KiB
Python
from unittest import TestCase
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from scrapy.http import Response, Request
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from scrapy.spiders import Spider
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from scrapy.spidermiddlewares.referer import RefererMiddleware, \
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POLICY_NO_REFERRER, POLICY_NO_REFERRER_WHEN_DOWNGRADE, \
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POLICY_SAME_ORIGIN, POLICY_ORIGIN, POLICY_ORIGIN_WHEN_CROSS_ORIGIN, \
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POLICY_UNSAFE_URL
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class TestRefererMiddleware(TestCase):
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def setUp(self):
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self.spider = Spider('foo')
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self.mw = RefererMiddleware()
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def test_process_spider_output(self):
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res = Response('http://scrapytest.org')
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reqs = [Request('http://scrapytest.org/')]
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out = list(self.mw.process_spider_output(res, reqs, self.spider))
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self.assertEquals(out[0].headers.get('Referer'),
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b'http://scrapytest.org')
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def test_policy_default(self):
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"""
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Based on https://www.w3.org/TR/referrer-policy/#referrer-policy-no-referrer-when-downgrade
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with some additional filtering of s3://
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"""
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for origin, target, referrer in [
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('https://example.com/', 'https://scrapy.org/', b'https://example.com/'),
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('http://example.com/', 'http://scrapy.org/', b'http://example.com/'),
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('http://example.com/', 'https://scrapy.org/', b'http://example.com/'),
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('https://example.com/', 'http://scrapy.org/', None),
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# no credentials leak
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('http://user:password@example.com/', 'https://scrapy.org/', b'http://example.com/'),
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# no referrer leak for local schemes
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('file:///home/path/to/somefile.html', 'https://scrapy.org/', None),
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('file:///home/path/to/somefile.html', 'http://scrapy.org/', None),
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# no referrer leak for s3 origins
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('s3://mybucket/path/to/data.csv', 'https://scrapy.org/', None),
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('s3://mybucket/path/to/data.csv', 'http://scrapy.org/', None),
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]:
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response = Response(origin)
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request = Request(target)
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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def test_policy_no_referrer(self):
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for origin, target, referrer in [
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('https://example.com/page.html', 'https://example.com/', None),
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('http://www.example.com/', 'https://scrapy.org/', None),
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('http://www.example.com/', 'http://scrapy.org/', None),
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('https://www.example.com/', 'http://scrapy.org/', None),
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('file:///home/path/to/somefile.html', 'http://scrapy.org/', None),
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]:
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response = Response(origin)
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request = Request(target, meta={'referrer_policy': POLICY_NO_REFERRER})
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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def test_policy_no_referrer_when_downgrade(self):
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for origin, target, referrer in [
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# TLS to TLS: send non-empty referrer
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('https://example.com/page.html', 'https://not.example.com/', b'https://example.com/page.html'),
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('https://example.com/page.html', 'https://scrapy.org/', b'https://example.com/page.html'),
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('https://example.com:443/page.html', 'https://scrapy.org/', b'https://example.com/page.html'),
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('https://example.com:444/page.html', 'https://scrapy.org/', b'https://example.com:444/page.html'),
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('ftps://example.com/urls.zip', 'https://scrapy.org/', b'ftps://example.com/urls.zip'),
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# TLS to non-TLS: do not send referrer
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('https://example.com/page.html', 'http://not.example.com/', None),
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('https://example.com/page.html', 'http://scrapy.org/', None),
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('ftps://example.com/urls.zip', 'http://scrapy.org/', None),
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# non-TLS to TLS or non-TLS: send referrer
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('http://example.com/page.html', 'https://not.example.com/', b'http://example.com/page.html'),
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('http://example.com/page.html', 'https://scrapy.org/', b'http://example.com/page.html'),
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('http://example.com:8080/page.html', 'https://scrapy.org/', b'http://example.com:8080/page.html'),
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('http://example.com:80/page.html', 'http://not.example.com/', b'http://example.com/page.html'),
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('http://example.com/page.html', 'http://scrapy.org/', b'http://example.com/page.html'),
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('http://example.com:443/page.html', 'http://scrapy.org/', b'http://example.com:443/page.html'),
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('ftp://example.com/urls.zip', 'http://scrapy.org/', b'ftp://example.com/urls.zip'),
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('ftp://example.com/urls.zip', 'https://scrapy.org/', b'ftp://example.com/urls.zip'),
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# test for user/password stripping
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('http://user:password@example.com/page.html', 'https://not.example.com/', b'http://example.com/page.html'),
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]:
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response = Response(origin)
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request = Request(target, meta={'referrer_policy': POLICY_NO_REFERRER_WHEN_DOWNGRADE})
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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def test_policy_same_origin(self):
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for origin, target, referrer in [
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# Same origin (protocol, host, port): send referrer
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('https://example.com/page.html', 'https://example.com/not-page.html', b'https://example.com/page.html'),
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('http://example.com/page.html', 'http://example.com/not-page.html', b'http://example.com/page.html'),
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('https://example.com:443/page.html', 'https://example.com/not-page.html', b'https://example.com/page.html'),
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('http://example.com:80/page.html', 'http://example.com/not-page.html', b'http://example.com/page.html'),
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('http://example.com/page.html', 'http://example.com:80/not-page.html', b'http://example.com/page.html'),
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('http://example.com:8888/page.html', 'http://example.com:8888/not-page.html', b'http://example.com:8888/page.html'),
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# Different host: do NOT send referrer
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('https://example.com/page.html', 'https://not.example.com/otherpage.html', None),
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('http://example.com/page.html', 'http://not.example.com/otherpage.html', None),
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('http://example.com/page.html', 'http://www.example.com/otherpage.html', None),
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# Different port: do NOT send referrer
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('https://example.com:444/page.html', 'https://example.com/not-page.html', None),
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('http://example.com:81/page.html', 'http://example.com/not-page.html', None),
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('http://example.com/page.html', 'http://example.com:81/not-page.html', None),
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# Different protocols: do NOT send refferer
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('https://example.com/page.html', 'http://example.com/not-page.html', None),
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('https://example.com/page.html', 'http://not.example.com/', None),
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('ftps://example.com/urls.zip', 'https://example.com/not-page.html', None),
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('ftp://example.com/urls.zip', 'http://example.com/not-page.html', None),
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('ftps://example.com/urls.zip', 'https://example.com/not-page.html', None),
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# test for user/password stripping
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('https://user:password@example.com/page.html', 'https://example.com/not-page.html', b'https://example.com/page.html'),
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('https://user:password@example.com/page.html', 'http://example.com/not-page.html', None),
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]:
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response = Response(origin)
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request = Request(target, meta={'referrer_policy': POLICY_SAME_ORIGIN})
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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def test_policy_origin(self):
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for origin, target, referrer in [
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# TLS or non-TLS to TLS or non-TLS: referrer origin is sent (yes, even for downgrades)
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('https://example.com/page.html', 'https://example.com/not-page.html', b'https://example.com/'),
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('https://example.com/page.html', 'https://scrapy.org', b'https://example.com/'),
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('https://example.com/page.html', 'http://scrapy.org', b'https://example.com/'),
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('http://example.com/page.html', 'http://scrapy.org', b'http://example.com/'),
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# test for user/password stripping
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('https://user:password@example.com/page.html', 'http://scrapy.org', b'https://example.com/'),
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]:
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response = Response(origin)
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request = Request(target, meta={'referrer_policy': POLICY_ORIGIN})
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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def test_policy_origin_when_cross_origin(self):
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for origin, target, referrer in [
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# Same origin (protocol, host, port): send referrer
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('https://example.com/page.html', 'https://example.com/not-page.html', b'https://example.com/page.html'),
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('http://example.com/page.html', 'http://example.com/not-page.html', b'http://example.com/page.html'),
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('https://example.com:443/page.html', 'https://example.com/not-page.html', b'https://example.com/page.html'),
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('http://example.com:80/page.html', 'http://example.com/not-page.html', b'http://example.com/page.html'),
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('http://example.com/page.html', 'http://example.com:80/not-page.html', b'http://example.com/page.html'),
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('http://example.com:8888/page.html', 'http://example.com:8888/not-page.html', b'http://example.com:8888/page.html'),
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# Different host: send origin as referrer
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('https://example2.com/page.html', 'https://scrapy.org/otherpage.html', b'https://example2.com/'),
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('https://example2.com/page.html', 'https://not.example2.com/otherpage.html', b'https://example2.com/'),
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('http://example2.com/page.html', 'http://not.example2.com/otherpage.html', b'http://example2.com/'),
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# exact match required
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('http://example2.com/page.html', 'http://www.example2.com/otherpage.html', b'http://example2.com/'),
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# Different port: send origin as referrer
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('https://example3.com:444/page.html', 'https://example3.com/not-page.html', b'https://example3.com:444/'),
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('http://example3.com:81/page.html', 'http://example3.com/not-page.html', b'http://example3.com:81/'),
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# Different protocols: send origin as referrer
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('https://example4.com/page.html', 'http://example4.com/not-page.html', b'https://example4.com/'),
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('https://example4.com/page.html', 'http://not.example4.com/', b'https://example4.com/'),
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('ftps://example4.com/urls.zip', 'https://example4.com/not-page.html', b'ftps://example4.com/'),
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('ftp://example4.com/urls.zip', 'http://example4.com/not-page.html', b'ftp://example4.com/'),
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('ftps://example4.com/urls.zip', 'https://example4.com/not-page.html', b'ftps://example4.com/'),
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# test for user/password stripping
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('https://user:password@example5.com/page.html', 'https://example5.com/not-page.html', b'https://example5.com/page.html'),
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# TLS to non-TLS downgrade: send origin
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('https://user:password@example5.com/page.html', 'http://example5.com/not-page.html', b'https://example5.com/'),
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]:
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response = Response(origin)
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request = Request(target, meta={'referrer_policy': POLICY_ORIGIN_WHEN_CROSS_ORIGIN})
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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def test_policy_unsafe_url(self):
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for origin, target, referrer in [
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# TLS to TLS: send referrer
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('https://example.com/sekrit.html', 'http://not.example.com/', b'https://example.com/sekrit.html'),
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('https://example1.com/page.html', 'https://not.example1.com/', b'https://example1.com/page.html'),
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('https://example1.com/page.html', 'https://scrapy.org/', b'https://example1.com/page.html'),
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('https://example1.com:443/page.html', 'https://scrapy.org/', b'https://example1.com/page.html'),
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('https://example1.com:444/page.html', 'https://scrapy.org/', b'https://example1.com:444/page.html'),
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('ftps://example1.com/urls.zip', 'https://scrapy.org/', b'ftps://example1.com/urls.zip'),
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# TLS to non-TLS: send referrer (yes, it's unsafe)
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('https://example2.com/page.html', 'http://not.example2.com/', b'https://example2.com/page.html'),
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('https://example2.com/page.html', 'http://scrapy.org/', b'https://example2.com/page.html'),
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('ftps://example2.com/urls.zip', 'http://scrapy.org/', b'ftps://example2.com/urls.zip'),
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# non-TLS to TLS or non-TLS: send referrer (yes, it's unsafe)
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('http://example3.com/page.html', 'https://not.example3.com/', b'http://example3.com/page.html'),
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('http://example3.com/page.html', 'https://scrapy.org/', b'http://example3.com/page.html'),
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('http://example3.com:8080/page.html', 'https://scrapy.org/', b'http://example3.com:8080/page.html'),
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('http://example3.com:80/page.html', 'http://not.example3.com/', b'http://example3.com/page.html'),
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('http://example3.com/page.html', 'http://scrapy.org/', b'http://example3.com/page.html'),
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('http://example3.com:443/page.html', 'http://scrapy.org/', b'http://example3.com:443/page.html'),
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('ftp://example3.com/urls.zip', 'http://scrapy.org/', b'ftp://example3.com/urls.zip'),
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('ftp://example3.com/urls.zip', 'https://scrapy.org/', b'ftp://example3.com/urls.zip'),
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# test for user/password stripping
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('http://user:password@example4.com/page.html', 'https://not.example4.com/', b'http://example4.com/page.html'),
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('https://user:password@example4.com/page.html', 'http://scrapy.org/', b'https://example4.com/page.html'),
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]:
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response = Response(origin)
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request = Request(target, meta={'referrer_policy': POLICY_UNSAFE_URL})
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out = list(self.mw.process_spider_output(response, [request], self.spider))
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self.assertEquals(out[0].headers.get('Referer'), referrer)
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