def test_pinning(self):
# Check to make sure the 'other' database shows in in reads first
success = False
for i in range(100):
db = self.router.db_for_read(self.obj1)
if db == 'other':
success = True
break
self.assertTrue(success, "The 'other' database was not offered.")
# Simulate a write
self.router.db_for_write(self.obj1)
# Check to make sure that only the master database shows up in reads,
# since the thread should now be pinned
success = True
for i in range(100):
db = self.router.db_for_read(self.obj1)
if db == 'other':
success = False
break
self.assertTrue(success, "The 'other' database was offered in error.")
pinning.unpin_thread()
pinning.clear_db_write()
def test_pinning(self):
# Check to make sure the 'other' database shows in in reads first
success = False
for i in range(100):
db = self.router.db_for_read(self.obj1)
if db == 'other':
success = True
break
self.assertTrue(success, "The 'other' database was not offered.")
# Simulate a write
self.router.db_for_write(self.obj1)
# Check to make sure that only the master database shows up in reads,
# since the thread should now be pinned
success = True
for i in range(100):
db = self.router.db_for_read(self.obj1)
if db == 'other':
success = False
break
self.assertTrue(success, "The 'other' database was offered in error.")
pinning.unpin_thread()
pinning.clear_db_write()
def process_response(self, request, response):
"""
If there was a write to the db, set the session variable to enable
pinning. If the variable already exists, the time will be reset.
"""
if pinning.db_was_written():
pinned_until = datetime.now() + timedelta(seconds=PINNING_SECONDS)
request.session[PINNING_KEY] = pinned_until
pinning.clear_db_write()
pinning.unpin_thread()
return response
def process_response(self, request, response):
"""
If there was a write to the db, set the session variable to enable
pinning. If the variable already exists, the time will be reset.
"""
if pinning.db_was_written():
pinned_until = datetime.now() + timedelta(seconds=PINNING_SECONDS)
request.session[PINNING_KEY] = pinned_until
pinning.clear_db_write()
pinning.unpin_thread()
return response
def process_response(self, request, response):
"""
If this is a POST request and there was a write to the db, set the
cookie to enable pinning. If the cookie already exists, the time will
be reset.
"""
if request.method == 'POST' and pinning.db_was_written():
response.set_cookie(PINNING_KEY,
value='y',
max_age=PINNING_SECONDS)
pinning.clear_db_write()
pinning.unpin_thread()
return response
def process_response(self, request, response):
"""
If this is a POST request and there was a write to the db, set the
cookie to enable pinning. If the cookie already exists, the time will
be reset.
"""
if request.method == 'POST' and pinning.db_was_written():
response.set_cookie(PINNING_KEY,
value='y',
max_age=PINNING_SECONDS)
pinning.clear_db_write()
pinning.unpin_thread()
return response
def test_middleware(self):
for middleware, vehicle in [(PinningSessionMiddleware(), 'session'),
(PinningCookieMiddleware(), 'cookie')]:
# The first request shouldn't pin the database
middleware.process_request(self.mock_request)
self.assertFalse(pinning.thread_is_pinned())
# A simulated write also shouldn't, if the request isn't a POST
pinning.set_db_write()
middleware.process_request(self.mock_request)
self.assertFalse(pinning.thread_is_pinned())
# This response should set the session variable and clear the pin
pinning.set_db_write()
self.mock_request.method = 'POST'
response = middleware.process_response(self.mock_request,
self.mock_response)
self.assertFalse(pinning.thread_is_pinned())
self.assertFalse(pinning.db_was_written())
if vehicle == 'session':
self.assertTrue(
self.mock_request.session.get(PINNING_KEY, False)
)
else:
self.assertEqual(response.cookie, PINNING_KEY)
self.mock_request.COOKIES = [response.cookie]
# The subsequent request should then pin the database
middleware.process_request(self.mock_request)
self.assertTrue(pinning.thread_is_pinned())
pinning.unpin_thread()
if vehicle == 'session':
# After the pinning period has expired, the request should no
# longer pin the thread
exp = timedelta(seconds=PINNING_SECONDS - 5)
self.mock_request.session[PINNING_KEY] = datetime.now() - exp
middleware.process_request(self.mock_request)
self.assertFalse(pinning.thread_is_pinned())
pinning.unpin_thread()
def test_middleware(self):
for middleware, vehicle in [(PinningSessionMiddleware(), 'session'),
(PinningCookieMiddleware(), 'cookie')]:
# The first request shouldn't pin the database
middleware.process_request(self.mock_request)
self.assertFalse(pinning.thread_is_pinned())
# A simulated write also shouldn't, if the request isn't a POST
pinning.set_db_write()
middleware.process_request(self.mock_request)
self.assertFalse(pinning.thread_is_pinned())
# This response should set the session variable and clear the pin
pinning.set_db_write()
self.mock_request.method = 'POST'
response = middleware.process_response(self.mock_request,
self.mock_response)
self.assertFalse(pinning.thread_is_pinned())
self.assertFalse(pinning.db_was_written())
if vehicle == 'session':
self.assertTrue(
self.mock_request.session.get(PINNING_KEY, False)
)
else:
self.assertEqual(response.cookie, PINNING_KEY)
self.mock_request.COOKIES = [response.cookie]
# The subsequent request should then pin the database
middleware.process_request(self.mock_request)
self.assertTrue(pinning.thread_is_pinned())
pinning.unpin_thread()
if vehicle == 'session':
# After the pinning period has expired, the request should no
# longer pin the thread
exp = timedelta(seconds=PINNING_SECONDS - 5)
self.mock_request.session[PINNING_KEY] = datetime.now() - exp
middleware.process_request(self.mock_request)
self.assertFalse(pinning.thread_is_pinned())
pinning.unpin_thread()
