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cpython/Lib/test/test_robotparser.py

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import io
import os
import threading
import unittest
import urllib.robotparser
from test import support
from http.server import BaseHTTPRequestHandler, HTTPServer
class BaseRobotTest:
robots_txt = ''
agent = 'test_robotparser'
good = []
bad = []
def setUp(self):
lines = io.StringIO(self.robots_txt).readlines()
self.parser = urllib.robotparser.RobotFileParser()
self.parser.parse(lines)
def get_agent_and_url(self, url):
if isinstance(url, tuple):
agent, url = url
return agent, url
return self.agent, url
def test_good_urls(self):
for url in self.good:
agent, url = self.get_agent_and_url(url)
with self.subTest(url=url, agent=agent):
self.assertTrue(self.parser.can_fetch(agent, url))
def test_bad_urls(self):
for url in self.bad:
agent, url = self.get_agent_and_url(url)
with self.subTest(url=url, agent=agent):
self.assertFalse(self.parser.can_fetch(agent, url))
class UserAgentWildcardTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
Disallow: /tmp/ # these will soon disappear
Disallow: /foo.html
"""
good = ['/', '/test.html']
bad = ['/cyberworld/map/index.html', '/tmp/xxx', '/foo.html']
class CrawlDelayAndCustomAgentTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
# robots.txt for http://www.example.com/
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
# Cybermapper knows where to go.
User-agent: cybermapper
Disallow:
"""
good = ['/', '/test.html', ('cybermapper', '/cyberworld/map/index.html')]
bad = ['/cyberworld/map/index.html']
class RejectAllRobotsTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
# go away
User-agent: *
Disallow: /
"""
good = []
bad = ['/cyberworld/map/index.html', '/', '/tmp/']
class BaseRequestRateTest(BaseRobotTest):
request_rate = None
crawl_delay = None
def test_request_rate(self):
parser = self.parser
for url in self.good + self.bad:
agent, url = self.get_agent_and_url(url)
with self.subTest(url=url, agent=agent):
self.assertEqual(parser.crawl_delay(agent), self.crawl_delay)
parsed_request_rate = parser.request_rate(agent)
self.assertEqual(parsed_request_rate, self.request_rate)
if self.request_rate is not None:
self.assertIsInstance(
parsed_request_rate,
urllib.robotparser.RequestRate
)
self.assertEqual(
parsed_request_rate.requests,
self.request_rate.requests
)
self.assertEqual(
parsed_request_rate.seconds,
self.request_rate.seconds
)
class EmptyFileTest(BaseRequestRateTest, unittest.TestCase):
robots_txt = ''
good = ['/foo']
class CrawlDelayAndRequestRateTest(BaseRequestRateTest, unittest.TestCase):
robots_txt = """\
User-agent: figtree
Crawl-delay: 3
Request-rate: 9/30
Disallow: /tmp
Disallow: /a%3cd.html
Disallow: /a%2fb.html
Disallow: /%7ejoe/index.html
"""
agent = 'figtree'
request_rate = urllib.robotparser.RequestRate(9, 30)
crawl_delay = 3
good = [('figtree', '/foo.html')]
bad = ['/tmp', '/tmp.html', '/tmp/a.html', '/a%3cd.html', '/a%3Cd.html',
'/a%2fb.html', '/~joe/index.html']
class DifferentAgentTest(CrawlDelayAndRequestRateTest):
agent = 'FigTree Robot libwww-perl/5.04'
class InvalidRequestRateTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Disallow: /tmp/
Disallow: /a%3Cd.html
Disallow: /a/b.html
Disallow: /%7ejoe/index.html
Crawl-delay: 3
Request-rate: 9/banana
"""
good = ['/tmp']
bad = ['/tmp/', '/tmp/a.html', '/a%3cd.html', '/a%3Cd.html', '/a/b.html',
'/%7Ejoe/index.html']
crawl_delay = 3
class InvalidCrawlDelayTest(BaseRobotTest, unittest.TestCase):
# From bug report #523041
robots_txt = """\
User-Agent: *
Disallow: /.
Crawl-delay: pears
"""
good = ['/foo.html']
# bug report says "/" should be denied, but that is not in the RFC
bad = []
class AnotherInvalidRequestRateTest(BaseRobotTest, unittest.TestCase):
# also test that Allow and Diasallow works well with each other
robots_txt = """\
User-agent: Googlebot
Allow: /folder1/myfile.html
Disallow: /folder1/
Request-rate: whale/banana
"""
agent = 'Googlebot'
good = ['/folder1/myfile.html']
bad = ['/folder1/anotherfile.html']
class UserAgentOrderingTest(BaseRobotTest, unittest.TestCase):
# the order of User-agent should be correct. note
# that this file is incorrect because "Googlebot" is a
# substring of "Googlebot-Mobile"
robots_txt = """\
User-agent: Googlebot
Disallow: /
User-agent: Googlebot-Mobile
Allow: /
"""
agent = 'Googlebot'
bad = ['/something.jpg']
class UserAgentGoogleMobileTest(UserAgentOrderingTest):
agent = 'Googlebot-Mobile'
class GoogleURLOrderingTest(BaseRobotTest, unittest.TestCase):
# Google also got the order wrong. You need
# to specify the URLs from more specific to more general
robots_txt = """\
User-agent: Googlebot
Allow: /folder1/myfile.html
Disallow: /folder1/
"""
agent = 'googlebot'
good = ['/folder1/myfile.html']
bad = ['/folder1/anotherfile.html']
class DisallowQueryStringTest(BaseRobotTest, unittest.TestCase):
# see issue #6325 for details
robots_txt = """\
User-agent: *
Disallow: /some/path?name=value
"""
good = ['/some/path']
bad = ['/some/path?name=value']
class UseFirstUserAgentWildcardTest(BaseRobotTest, unittest.TestCase):
# obey first * entry (#4108)
robots_txt = """\
User-agent: *
Disallow: /some/path
User-agent: *
Disallow: /another/path
"""
good = ['/another/path']
bad = ['/some/path']
class EmptyQueryStringTest(BaseRobotTest, unittest.TestCase):
# normalize the URL first (#17403)
robots_txt = """\
User-agent: *
Allow: /some/path?
Disallow: /another/path?
"""
good = ['/some/path?']
bad = ['/another/path?']
class DefaultEntryTest(BaseRequestRateTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/
"""
request_rate = urllib.robotparser.RequestRate(3, 15)
crawl_delay = 1
good = ['/', '/test.html']
bad = ['/cyberworld/map/index.html']
class StringFormattingTest(BaseRobotTest, unittest.TestCase):
robots_txt = """\
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/ # This is an infinite virtual URL space
# Cybermapper knows where to go.
User-agent: cybermapper
Disallow: /some/path
"""
expected_output = """\
User-agent: cybermapper
Disallow: /some/path
User-agent: *
Crawl-delay: 1
Request-rate: 3/15
Disallow: /cyberworld/map/
"""
def test_string_formatting(self):
self.assertEqual(str(self.parser), self.expected_output)
class RobotHandler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_error(403, "Forbidden access")
def log_message(self, format, *args):
pass
class PasswordProtectedSiteTestCase(unittest.TestCase):
def setUp(self):
self.server = HTTPServer((support.HOST, 0), RobotHandler)
self.t = threading.Thread(
name='HTTPServer serving',
target=self.server.serve_forever,
# Short poll interval to make the test finish quickly.
# Time between requests is short enough that we won't wake
# up spuriously too many times.
kwargs={'poll_interval':0.01})
self.t.daemon = True # In case this function raises.
self.t.start()
def tearDown(self):
self.server.shutdown()
self.t.join()
self.server.server_close()
@support.reap_threads
def testPasswordProtectedSite(self):
addr = self.server.server_address
url = 'http://' + support.HOST + ':' + str(addr[1])
robots_url = url + "/robots.txt"
parser = urllib.robotparser.RobotFileParser()
parser.set_url(url)
parser.read()
self.assertFalse(parser.can_fetch("*", robots_url))
class NetworkTestCase(unittest.TestCase):
base_url = 'http://www.pythontest.net/'
robots_txt = '{}elsewhere/robots.txt'.format(base_url)
@classmethod
def setUpClass(cls):
support.requires('network')
with support.transient_internet(cls.base_url):
cls.parser = urllib.robotparser.RobotFileParser(cls.robots_txt)
cls.parser.read()
def url(self, path):
return '{}{}{}'.format(
self.base_url, path, '/' if not os.path.splitext(path)[1] else ''
)
def test_basic(self):
self.assertFalse(self.parser.disallow_all)
self.assertFalse(self.parser.allow_all)
self.assertGreater(self.parser.mtime(), 0)
self.assertFalse(self.parser.crawl_delay('*'))
self.assertFalse(self.parser.request_rate('*'))
def test_can_fetch(self):
self.assertTrue(self.parser.can_fetch('*', self.url('elsewhere')))
self.assertFalse(self.parser.can_fetch('Nutch', self.base_url))
self.assertFalse(self.parser.can_fetch('Nutch', self.url('brian')))
self.assertFalse(self.parser.can_fetch('Nutch', self.url('webstats')))
self.assertFalse(self.parser.can_fetch('*', self.url('webstats')))
self.assertTrue(self.parser.can_fetch('*', self.base_url))
def test_read_404(self):
parser = urllib.robotparser.RobotFileParser(self.url('i-robot.txt'))
parser.read()
self.assertTrue(parser.allow_all)
self.assertFalse(parser.disallow_all)
self.assertEqual(parser.mtime(), 0)
self.assertIsNone(parser.crawl_delay('*'))
self.assertIsNone(parser.request_rate('*'))
if __name__=='__main__':
unittest.main()
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