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import unittest
from urllib3.connectionpool import (
connection_from_url,
HTTPConnection,
HTTPConnectionPool,
)
from urllib3.util.timeout import Timeout
from urllib3.packages.ssl_match_hostname import CertificateError
from urllib3.exceptions import (
ClosedPoolError,
EmptyPoolError,
HostChangedError,
LocationValueError,
MaxRetryError,
ProtocolError,
SSLError,
)
from socket import error as SocketError
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):
"""
Tests in this suite should exercise the ConnectionPool functionality
without actually making any network requests or connections.
"""
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'),
# Test comparison using default ports
('http://google.com:80/', 'http://google.com/abracadabra'),
('http://google.com/', 'http://google.com:80/abracadabra'),
('https://google.com:443/', 'https://google.com/abracadabra'),
('https://google.com/', 'https://google.com:443/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/'),
# Test comparison with default ports
('http://google.com:42', 'http://google.com'),
('https://google.com:42', 'https://google.com'),
('http://google.com:443', 'http://google.com'),
('https://google.com:80', 'https://google.com'),
('http://google.com:443', 'https://google.com'),
('https://google.com:80', 'http://google.com'),
('https://google.com:443', 'http://google.com'),
('http://google.com:80', 'https://google.com'),
]
for a, b in not_same_host:
c = connection_from_url(a)
self.assertFalse(c.is_same_host(b), "%s =? %s" % (a, b))
c = connection_from_url(b)
self.assertFalse(c.is_same_host(a), "%s =? %s" % (b, a))
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_retry_exception_str(self):
self.assertEqual(
str(MaxRetryError(
HTTPConnectionPool(host='localhost'), "Test.", None)),
"HTTPConnectionPool(host='localhost', port=None): "
"Max retries exceeded with url: Test. (Caused by None)")
err = SocketError("Test")
# using err.__class__ here, as socket.error is an alias for OSError
# since Py3.3 and gets printed as this
self.assertEqual(
str(MaxRetryError(
HTTPConnectionPool(host='localhost'), "Test.", err)),
"HTTPConnectionPool(host='localhost', port=None): "
"Max retries exceeded with url: Test. "
"(Caused by %r)" % err)
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)
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, EmptyPoolError)
_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)
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')
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)
self.assertRaises(ClosedPoolError, pool._get_conn)
pool._put_conn(conn3)
self.assertRaises(ClosedPoolError, pool._get_conn)
self.assertRaises(Empty, old_pool_queue.get, block=False)
def test_pool_timeouts(self):
pool = HTTPConnectionPool(host='localhost')
conn = pool._new_conn()
self.assertEqual(conn.__class__, HTTPConnection)
self.assertEqual(pool.timeout.__class__, Timeout)
self.assertEqual(pool.timeout._read, Timeout.DEFAULT_TIMEOUT)
self.assertEqual(pool.timeout._connect, Timeout.DEFAULT_TIMEOUT)
self.assertEqual(pool.timeout.total, None)
pool = HTTPConnectionPool(host='localhost', timeout=3)
self.assertEqual(pool.timeout._read, 3)
self.assertEqual(pool.timeout._connect, 3)
self.assertEqual(pool.timeout.total, None)
def test_no_host(self):
self.assertRaises(LocationValueError, HTTPConnectionPool, None)
if __name__ == '__main__':
unittest.main()
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