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import unittest
from urllib3.connectionpool import connection_from_url, HTTPConnectionPool
from urllib3.packages.ssl_match_hostname import CertificateError
from urllib3.exceptions import (
ClosedPoolError,
EmptyPoolError,
HostChangedError,
MaxRetryError,
SSLError,
TimeoutError,
)
from socket import timeout as SocketTimeout
from ssl import SSLError as BaseSSLError
try: # Python 3
from queue import Empty
from http.client import HTTPException
except ImportError:
from Queue import Empty
from httplib import HTTPException
class TestConnectionPool(unittest.TestCase):
def test_same_host(self):
same_host = [
('http://google.com/', '/'),
('http://google.com/', 'http://google.com/'),
('http://google.com/', 'http://google.com'),
('http://google.com/', 'http://google.com/abra/cadabra'),
('http://google.com:42/', 'http://google.com:42/abracadabra'),
]
for a, b in same_host:
c = connection_from_url(a)
self.assertTrue(c.is_same_host(b), "%s =? %s" % (a, b))
not_same_host = [
('https://google.com/', 'http://google.com/'),
('http://google.com/', 'https://google.com/'),
('http://yahoo.com/', 'http://google.com/'),
('http://google.com:42', 'https://google.com/abracadabra'),
('http://google.com', 'https://google.net/'),
]
for a, b in not_same_host:
c = connection_from_url(a)
self.assertFalse(c.is_same_host(b), "%s =? %s" % (a, b))
def test_max_connections(self):
pool = HTTPConnectionPool(host='localhost', maxsize=1, block=True)
pool._get_conn(timeout=0.01)
try:
pool._get_conn(timeout=0.01)
self.fail("Managed to get a connection without EmptyPoolError")
except EmptyPoolError:
pass
try:
pool.request('GET', '/', pool_timeout=0.01)
self.fail("Managed to get a connection without EmptyPoolError")
except EmptyPoolError:
pass
self.assertEqual(pool.num_connections, 1)
def test_pool_edgecases(self):
pool = HTTPConnectionPool(host='localhost', maxsize=1, block=False)
conn1 = pool._get_conn()
conn2 = pool._get_conn() # New because block=False
pool._put_conn(conn1)
pool._put_conn(conn2) # Should be discarded
self.assertEqual(conn1, pool._get_conn())
self.assertNotEqual(conn2, pool._get_conn())
self.assertEqual(pool.num_connections, 3)
def test_exception_str(self):
self.assertEqual(
str(EmptyPoolError(HTTPConnectionPool(host='localhost'), "Test.")),
"HTTPConnectionPool(host='localhost', port=None): Test.")
def test_pool_size(self):
POOL_SIZE = 1
pool = HTTPConnectionPool(host='localhost', maxsize=POOL_SIZE, block=True)
def _raise(ex):
raise ex()
def _test(exception, expect):
pool._make_request = lambda *args, **kwargs: _raise(exception)
with self.assertRaises(expect):
pool.request('GET', '/')
self.assertEqual(pool.pool.qsize(), POOL_SIZE)
#make sure that all of the exceptions return the connection to the pool
_test(Empty, TimeoutError)
_test(SocketTimeout, TimeoutError)
_test(BaseSSLError, SSLError)
_test(CertificateError, SSLError)
# The pool should never be empty, and with these two exceptions being raised,
# a retry will be triggered, but that retry will fail, eventually raising
# MaxRetryError, not EmptyPoolError
# See: https://github.com/shazow/urllib3/issues/76
pool._make_request = lambda *args, **kwargs: _raise(HTTPException)
with self.assertRaises(MaxRetryError):
pool.request('GET', '/', retries=1, pool_timeout=0.01)
self.assertEqual(pool.pool.qsize(), POOL_SIZE)
def test_assert_same_host(self):
c = connection_from_url('http://google.com:80')
with self.assertRaises(HostChangedError):
c.request('GET', 'http://yahoo.com:80', assert_same_host=True)
def test_pool_close(self):
pool = connection_from_url('http://google.com:80')
# Populate with some connections
conn1 = pool._get_conn()
conn2 = pool._get_conn()
conn3 = pool._get_conn()
pool._put_conn(conn1)
pool._put_conn(conn2)
old_pool_queue = pool.pool
pool.close()
self.assertEqual(pool.pool, None)
with self.assertRaises(ClosedPoolError):
pool._get_conn()
pool._put_conn(conn3)
with self.assertRaises(ClosedPoolError):
pool._get_conn()
with self.assertRaises(Empty):
old_pool_queue.get(block=False)
if __name__ == '__main__':
unittest.main()
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