cpython/Lib/test/test_urllib2net.py at 172d8929156ca19f65e2b881892f7d38b9b60fba · python/cpython

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import errno

import unittest

from test import support

from test.support import socket_helper

from test.test_urllib2 import sanepathname2url

import os

import socket

import urllib.error

import urllib.request

import sys

support.requires("network")

def _retry_thrice(func, exc, *args, **kwargs):

for i in range(3):

try:

return func(*args, **kwargs)

except exc as e:

last_exc = e

continue

raise last_exc

def _wrap_with_retry_thrice(func, exc):

def wrapped(*args, **kwargs):

return _retry_thrice(func, exc, *args, **kwargs)

return wrapped

# bpo-35411: FTP tests of test_urllib2net randomly fail

# with "425 Security: Bad IP connecting" on Travis CI

skip_ftp_test_on_travis = unittest.skipIf('TRAVIS' in os.environ,

'bpo-35411: skip FTP test '

'on Travis CI')

# Connecting to remote hosts is flaky. Make it more robust by retrying

# the connection several times.

_urlopen_with_retry = _wrap_with_retry_thrice(urllib.request.urlopen,

urllib.error.URLError)

class TransientResource(object):

"""Raise ResourceDenied if an exception is raised while the context manager

is in effect that matches the specified exception and attributes."""

def __init__(self, exc, **kwargs):

self.exc = exc

self.attrs = kwargs

def __enter__(self):

return self

def __exit__(self, type_=None, value=None, traceback=None):

"""If type_ is a subclass of self.exc and value has attributes matching

self.attrs, raise ResourceDenied. Otherwise let the exception

propagate (if any)."""

if type_ is not None and issubclass(self.exc, type_):

for attr, attr_value in self.attrs.items():

if not hasattr(value, attr):

break

if getattr(value, attr) != attr_value:

break

else:

raise ResourceDenied("an optional resource is not available")

# Context managers that raise ResourceDenied when various issues

# with the Internet connection manifest themselves as exceptions.

# XXX deprecate these and use transient_internet() instead

time_out = TransientResource(OSError, errno=errno.ETIMEDOUT)

socket_peer_reset = TransientResource(OSError, errno=errno.ECONNRESET)

ioerror_peer_reset = TransientResource(OSError, errno=errno.ECONNRESET)

class AuthTests(unittest.TestCase):

"""Tests urllib2 authentication features."""

## Disabled at the moment since there is no page under python.org which

## could be used to HTTP authentication.

# def test_basic_auth(self):

# import http.client

# test_url = "http://www.python.org/test/test_urllib2/basic_auth"

# test_hostport = "www.python.org"

# test_realm = 'Test Realm'

# test_user = 'test.test_urllib2net'

# test_password = 'blah'

# # failure

# try:

# _urlopen_with_retry(test_url)

# except urllib2.HTTPError, exc:

# self.assertEqual(exc.code, 401)

# else:

# self.fail("urlopen() should have failed with 401")

# # success

# auth_handler = urllib2.HTTPBasicAuthHandler()

# auth_handler.add_password(test_realm, test_hostport,

# test_user, test_password)

# opener = urllib2.build_opener(auth_handler)

# f = opener.open('http://localhost/')

# response = _urlopen_with_retry("http://www.python.org/")

# # The 'userinfo' URL component is deprecated by RFC 3986 for security

# # reasons, let's not implement it! (it's already implemented for proxy

# # specification strings (that is, URLs or authorities specifying a

# # proxy), so we must keep that)

# self.assertRaises(http.client.InvalidURL,

# urllib2.urlopen, "http://evil:thing@example.com")

class CloseSocketTest(unittest.TestCase):

def test_close(self):

# clear _opener global variable

self.addCleanup(urllib.request.urlcleanup)

# calling .close() on urllib2's response objects should close the

# underlying socket

url = support.TEST_HTTP_URL

with socket_helper.transient_internet(url):

response = _urlopen_with_retry(url)

sock = response.fp

self.assertFalse(sock.closed)

response.close()

self.assertTrue(sock.closed)

class OtherNetworkTests(unittest.TestCase):

def setUp(self):

if 0: # for debugging

import logging

logger = logging.getLogger("test_urllib2net")

logger.addHandler(logging.StreamHandler())

# XXX The rest of these tests aren't very good -- they don't check much.

# They do sometimes catch some major disasters, though.

@skip_ftp_test_on_travis

def test_ftp(self):

urls = [

'ftp://www.pythontest.net/README',

('ftp://www.pythontest.net/non-existent-file',

None, urllib.error.URLError),

]

self._test_urls(urls, self._extra_handlers())

def test_file(self):

TESTFN = support.TESTFN

f = open(TESTFN, 'w')

try:

f.write('hi there\n')

f.close()

urls = [

'file:' + sanepathname2url(os.path.abspath(TESTFN)),

('file:///nonsensename/etc/passwd', None,

urllib.error.URLError),

]

self._test_urls(urls, self._extra_handlers(), retry=True)

finally:

os.remove(TESTFN)

self.assertRaises(ValueError, urllib.request.urlopen,'./relative_path/to/file')

# XXX Following test depends on machine configurations that are internal

# to CNRI. Need to set up a public server with the right authentication

# configuration for test purposes.

## def test_cnri(self):

## if socket.gethostname() == 'bitdiddle':

## localhost = 'bitdiddle.cnri.reston.va.us'

## elif socket.gethostname() == 'bitdiddle.concentric.net':

## localhost = 'localhost'

## else:

## localhost = None

## if localhost is not None:

## urls = [

## 'file://%s/etc/passwd' % localhost,

## 'http://%s/simple/' % localhost,

## 'http://%s/digest/' % localhost,

## 'http://%s/not/found.h' % localhost,

## ]

## bauth = HTTPBasicAuthHandler()

## bauth.add_password('basic_test_realm', localhost, 'jhylton',

## 'password')

## dauth = HTTPDigestAuthHandler()

## dauth.add_password('digest_test_realm', localhost, 'jhylton',

## 'password')

## self._test_urls(urls, self._extra_handlers()+[bauth, dauth])

def test_urlwithfrag(self):

urlwith_frag = "http://www.pythontest.net/index.html#frag"

with socket_helper.transient_internet(urlwith_frag):

req = urllib.request.Request(urlwith_frag)

res = urllib.request.urlopen(req)

self.assertEqual(res.geturl(),

"http://www.pythontest.net/index.html#frag")

def test_redirect_url_withfrag(self):

redirect_url_with_frag = "http://www.pythontest.net/redir/with_frag/"

with socket_helper.transient_internet(redirect_url_with_frag):

req = urllib.request.Request(redirect_url_with_frag)

res = urllib.request.urlopen(req)

self.assertEqual(res.geturl(),

"http://www.pythontest.net/elsewhere/#frag")

def test_custom_headers(self):

url = support.TEST_HTTP_URL

with socket_helper.transient_internet(url):

opener = urllib.request.build_opener()

request = urllib.request.Request(url)

self.assertFalse(request.header_items())

opener.open(request)

self.assertTrue(request.header_items())

self.assertTrue(request.has_header('User-agent'))

request.add_header('User-Agent','Test-Agent')

opener.open(request)

self.assertEqual(request.get_header('User-agent'),'Test-Agent')

@unittest.skip('XXX: http://www.imdb.com is gone')

def test_sites_no_connection_close(self):

# Some sites do not send Connection: close header.

# Verify that those work properly. (#issue12576)

URL = 'http://www.imdb.com' # mangles Connection:close

with socket_helper.transient_internet(URL):

try:

with urllib.request.urlopen(URL) as res:

pass

except ValueError:

self.fail("urlopen failed for site not sending \

Connection:close")

else:

self.assertTrue(res)

req = urllib.request.urlopen(URL)

res = req.read()

self.assertTrue(res)

def _test_urls(self, urls, handlers, retry=True):

import time

import logging

debug = logging.getLogger("test_urllib2").debug

urlopen = urllib.request.build_opener(*handlers).open

if retry:

urlopen = _wrap_with_retry_thrice(urlopen, urllib.error.URLError)

for url in urls:

with self.subTest(url=url):

if isinstance(url, tuple):

url, req, expected_err = url

else:

req = expected_err = None

with socket_helper.transient_internet(url):

try:

f = urlopen(url, req, support.INTERNET_TIMEOUT)

# urllib.error.URLError is a subclass of OSError

except OSError as err:

if expected_err:

msg = ("Didn't get expected error(s) %s for %s %s, got %s: %s" %

(expected_err, url, req, type(err), err))

self.assertIsInstance(err, expected_err, msg)

else:

raise

else:

try:

with time_out, \

socket_peer_reset, \

ioerror_peer_reset:

buf = f.read()

debug("read %d bytes" % len(buf))

except socket.timeout:

print("<timeout: %s>" % url, file=sys.stderr)

f.close()

time.sleep(0.1)

def _extra_handlers(self):

handlers = []

cfh = urllib.request.CacheFTPHandler()

self.addCleanup(cfh.clear_cache)

cfh.setTimeout(1)

handlers.append(cfh)

return handlers

class TimeoutTest(unittest.TestCase):

def setUp(self):

# clear _opener global variable

self.addCleanup(urllib.request.urlcleanup)

def test_http_basic(self):

self.assertIsNone(socket.getdefaulttimeout())

url = support.TEST_HTTP_URL

with socket_helper.transient_internet(url, timeout=None):

u = _urlopen_with_retry(url)

self.addCleanup(u.close)

self.assertIsNone(u.fp.raw._sock.gettimeout())

def test_http_default_timeout(self):

self.assertIsNone(socket.getdefaulttimeout())

url = support.TEST_HTTP_URL

with socket_helper.transient_internet(url):

socket.setdefaulttimeout(60)

try:

u = _urlopen_with_retry(url)

self.addCleanup(u.close)

finally:

socket.setdefaulttimeout(None)

self.assertEqual(u.fp.raw._sock.gettimeout(), 60)

def test_http_no_timeout(self):

self.assertIsNone(socket.getdefaulttimeout())

url = support.TEST_HTTP_URL

with socket_helper.transient_internet(url):

socket.setdefaulttimeout(60)

try:

u = _urlopen_with_retry(url, timeout=None)

self.addCleanup(u.close)

finally:

socket.setdefaulttimeout(None)

self.assertIsNone(u.fp.raw._sock.gettimeout())

def test_http_timeout(self):

url = support.TEST_HTTP_URL

with socket_helper.transient_internet(url):

u = _urlopen_with_retry(url, timeout=120)

self.addCleanup(u.close)

self.assertEqual(u.fp.raw._sock.gettimeout(), 120)

FTP_HOST = 'ftp://www.pythontest.net/'

@skip_ftp_test_on_travis

def test_ftp_basic(self):

self.assertIsNone(socket.getdefaulttimeout())

with socket_helper.transient_internet(self.FTP_HOST, timeout=None):

u = _urlopen_with_retry(self.FTP_HOST)

self.addCleanup(u.close)

self.assertIsNone(u.fp.fp.raw._sock.gettimeout())

@skip_ftp_test_on_travis

def test_ftp_default_timeout(self):

self.assertIsNone(socket.getdefaulttimeout())

with socket_helper.transient_internet(self.FTP_HOST):

socket.setdefaulttimeout(60)

try:

u = _urlopen_with_retry(self.FTP_HOST)

self.addCleanup(u.close)

finally:

socket.setdefaulttimeout(None)

self.assertEqual(u.fp.fp.raw._sock.gettimeout(), 60)

@skip_ftp_test_on_travis

def test_ftp_no_timeout(self):

self.assertIsNone(socket.getdefaulttimeout())

with socket_helper.transient_internet(self.FTP_HOST):

socket.setdefaulttimeout(60)

try:

u = _urlopen_with_retry(self.FTP_HOST, timeout=None)

self.addCleanup(u.close)

finally:

socket.setdefaulttimeout(None)

self.assertIsNone(u.fp.fp.raw._sock.gettimeout())

@skip_ftp_test_on_travis

def test_ftp_timeout(self):

with socket_helper.transient_internet(self.FTP_HOST):

u = _urlopen_with_retry(self.FTP_HOST, timeout=60)

self.addCleanup(u.close)

self.assertEqual(u.fp.fp.raw._sock.gettimeout(), 60)

if __name__ == "__main__":

unittest.main()

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