import errno
import unittest
from test import support
from test.support import os_helper
from test.support import socket_helper
from test.support import ResourceDenied
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
# 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:[email protected]")
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.
@support.requires_resource('walltime')
def test_ftp(self):
# Testing the same URL twice exercises the caching in CacheFTPHandler
urls = [
'ftp://www.pythontest.net/README',
'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 = os_helper.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")
@support.requires_resource('walltime')
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 TimeoutError:
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/'
@support.requires_resource('walltime')
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())
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)
@support.requires_resource('walltime')
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())
@support.requires_resource('walltime')
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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