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219 lines
8.8 KiB
Python
219 lines
8.8 KiB
Python
import unittest
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from test import support
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import contextlib
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import socket
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import urllib.request
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import os
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import email.message
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import time
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support.requires('network')
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class URLTimeoutTest(unittest.TestCase):
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# XXX this test doesn't seem to test anything useful.
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TIMEOUT = 30.0
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def setUp(self):
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socket.setdefaulttimeout(self.TIMEOUT)
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def tearDown(self):
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socket.setdefaulttimeout(None)
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def testURLread(self):
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with support.transient_internet("www.example.com"):
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f = urllib.request.urlopen("http://www.example.com/")
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f.read()
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class urlopenNetworkTests(unittest.TestCase):
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"""Tests urllib.request.urlopen using the network.
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These tests are not exhaustive. Assuming that testing using files does a
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good job overall of some of the basic interface features. There are no
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tests exercising the optional 'data' and 'proxies' arguments. No tests
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for transparent redirection have been written.
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setUp is not used for always constructing a connection to
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http://www.pythontest.net/ since there a few tests that don't use that address
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and making a connection is expensive enough to warrant minimizing unneeded
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connections.
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"""
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url = 'http://www.pythontest.net/'
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@contextlib.contextmanager
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def urlopen(self, *args, **kwargs):
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resource = args[0]
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with support.transient_internet(resource):
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r = urllib.request.urlopen(*args, **kwargs)
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try:
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yield r
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finally:
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r.close()
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def test_basic(self):
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# Simple test expected to pass.
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with self.urlopen(self.url) as open_url:
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for attr in ("read", "readline", "readlines", "fileno", "close",
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"info", "geturl"):
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self.assertTrue(hasattr(open_url, attr), "object returned from "
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"urlopen lacks the %s attribute" % attr)
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self.assertTrue(open_url.read(), "calling 'read' failed")
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def test_readlines(self):
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# Test both readline and readlines.
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with self.urlopen(self.url) as open_url:
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self.assertIsInstance(open_url.readline(), bytes,
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"readline did not return a string")
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self.assertIsInstance(open_url.readlines(), list,
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"readlines did not return a list")
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def test_info(self):
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# Test 'info'.
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with self.urlopen(self.url) as open_url:
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info_obj = open_url.info()
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self.assertIsInstance(info_obj, email.message.Message,
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"object returned by 'info' is not an "
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"instance of email.message.Message")
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self.assertEqual(info_obj.get_content_subtype(), "html")
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def test_geturl(self):
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# Make sure same URL as opened is returned by geturl.
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with self.urlopen(self.url) as open_url:
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gotten_url = open_url.geturl()
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self.assertEqual(gotten_url, self.url)
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def test_getcode(self):
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# test getcode() with the fancy opener to get 404 error codes
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URL = self.url + "XXXinvalidXXX"
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with support.transient_internet(URL):
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with self.assertWarns(DeprecationWarning):
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open_url = urllib.request.FancyURLopener().open(URL)
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try:
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code = open_url.getcode()
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finally:
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open_url.close()
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self.assertEqual(code, 404)
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def test_bad_address(self):
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# Make sure proper exception is raised when connecting to a bogus
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# address.
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# Given that both VeriSign and various ISPs have in
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# the past or are presently hijacking various invalid
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# domain name requests in an attempt to boost traffic
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# to their own sites, finding a domain name to use
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# for this test is difficult. RFC2606 leads one to
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# believe that '.invalid' should work, but experience
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# seemed to indicate otherwise. Single character
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# TLDs are likely to remain invalid, so this seems to
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# be the best choice. The trailing '.' prevents a
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# related problem: The normal DNS resolver appends
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# the domain names from the search path if there is
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# no '.' the end and, and if one of those domains
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# implements a '*' rule a result is returned.
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# However, none of this will prevent the test from
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# failing if the ISP hijacks all invalid domain
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# requests. The real solution would be to be able to
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# parameterize the framework with a mock resolver.
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bogus_domain = "sadflkjsasf.i.nvali.d."
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try:
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socket.gethostbyname(bogus_domain)
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except OSError:
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# socket.gaierror is too narrow, since getaddrinfo() may also
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# fail with EAI_SYSTEM and ETIMEDOUT (seen on Ubuntu 13.04),
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# i.e. Python's TimeoutError.
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pass
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else:
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# This happens with some overzealous DNS providers such as OpenDNS
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self.skipTest("%r should not resolve for test to work" % bogus_domain)
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failure_explanation = ('opening an invalid URL did not raise OSError; '
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'can be caused by a broken DNS server '
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'(e.g. returns 404 or hijacks page)')
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with self.assertRaises(OSError, msg=failure_explanation):
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urllib.request.urlopen("http://{}/".format(bogus_domain))
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class urlretrieveNetworkTests(unittest.TestCase):
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"""Tests urllib.request.urlretrieve using the network."""
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@contextlib.contextmanager
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def urlretrieve(self, *args, **kwargs):
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resource = args[0]
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with support.transient_internet(resource):
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file_location, info = urllib.request.urlretrieve(*args, **kwargs)
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try:
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yield file_location, info
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finally:
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support.unlink(file_location)
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def test_basic(self):
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# Test basic functionality.
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with self.urlretrieve(self.logo) as (file_location, info):
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self.assertTrue(os.path.exists(file_location), "file location returned by"
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" urlretrieve is not a valid path")
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with open(file_location, 'rb') as f:
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self.assertTrue(f.read(), "reading from the file location returned"
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" by urlretrieve failed")
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def test_specified_path(self):
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# Make sure that specifying the location of the file to write to works.
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with self.urlretrieve(self.logo,
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support.TESTFN) as (file_location, info):
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self.assertEqual(file_location, support.TESTFN)
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self.assertTrue(os.path.exists(file_location))
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with open(file_location, 'rb') as f:
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self.assertTrue(f.read(), "reading from temporary file failed")
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def test_header(self):
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# Make sure header returned as 2nd value from urlretrieve is good.
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with self.urlretrieve(self.logo) as (file_location, info):
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self.assertIsInstance(info, email.message.Message,
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"info is not an instance of email.message.Message")
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logo = "http://www.pythontest.net/"
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def test_data_header(self):
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with self.urlretrieve(self.logo) as (file_location, fileheaders):
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datevalue = fileheaders.get('Date')
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dateformat = '%a, %d %b %Y %H:%M:%S GMT'
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try:
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time.strptime(datevalue, dateformat)
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except ValueError:
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self.fail('Date value not in %r format' % dateformat)
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def test_reporthook(self):
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records = []
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def recording_reporthook(blocks, block_size, total_size):
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records.append((blocks, block_size, total_size))
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with self.urlretrieve(self.logo, reporthook=recording_reporthook) as (
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file_location, fileheaders):
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expected_size = int(fileheaders['Content-Length'])
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records_repr = repr(records) # For use in error messages.
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self.assertGreater(len(records), 1, msg="There should always be two "
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"calls; the first one before the transfer starts.")
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self.assertEqual(records[0][0], 0)
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self.assertGreater(records[0][1], 0,
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msg="block size can't be 0 in %s" % records_repr)
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self.assertEqual(records[0][2], expected_size)
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self.assertEqual(records[-1][2], expected_size)
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block_sizes = {block_size for _, block_size, _ in records}
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self.assertEqual({records[0][1]}, block_sizes,
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msg="block sizes in %s must be equal" % records_repr)
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self.assertGreaterEqual(records[-1][0]*records[0][1], expected_size,
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msg="number of blocks * block size must be"
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" >= total size in %s" % records_repr)
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if __name__ == "__main__":
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unittest.main()
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