class RetryTest(unittest.TestCase):
def setUp(self):
self.spider = BaseSpider()
self.mw = RetryMiddleware()
self.mw.max_retry_times = 2
def test_priority_adjust(self):
req = Request('http://www.scrapytest.org/503')
rsp = Response('http://www.scrapytest.org/503', body='', status=503)
req2 = self.mw.process_response(req, rsp, self.spider)
assert req2.priority < req.priority
def test_404(self):
req = Request('http://www.scrapytest.org/404')
rsp = Response('http://www.scrapytest.org/404', body='', status=404)
# dont retry 404s
assert self.mw.process_response(req, rsp, self.spider) is rsp
def test_503(self):
req = Request('http://www.scrapytest.org/503')
rsp = Response('http://www.scrapytest.org/503', body='', status=503)
# first retry
req = self.mw.process_response(req, rsp, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 1)
# second retry
req = self.mw.process_response(req, rsp, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 2)
# discard it
assert self.mw.process_response(req, rsp, self.spider) is rsp
def test_twistederrors(self):
for exc in (ServerTimeoutError, DNSLookupError, ConnectionRefusedError, ConnectionDone, ConnectError, ConnectionLost):
req = Request('http://www.scrapytest.org/%s' % exc.__name__)
self._test_retry_exception(req, exc())
def _test_retry_exception(self, req, exception):
# first retry
req = self.mw.process_exception(req, exception, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 1)
# second retry
req = self.mw.process_exception(req, exception, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 2)
# discard it
req = self.mw.process_exception(req, exception, self.spider)
self.assertEqual(req, None)
def process_exception(self, request, exception, spider):
to_return = RetryMiddleware.process_exception(
self, request, exception, spider)
# customize retry middleware by modifying this
request.meta['url'] = request.url
self.record_failed('failed.txt', request, exception, 'url')
return to_return
def process_exception(self, request, exception, spider):
to_return = RetryMiddleware.process_exception(self, request, exception,
spider)
# customize retry middleware by modifying this
request.meta['url'] = request.url
self.record_failed('failed.txt', request, exception, 'url')
return to_return
class RetryTest(unittest.TestCase):
def setUp(self):
self.spider = BaseSpider('foo')
self.mw = RetryMiddleware()
self.mw.max_retry_times = 2
def test_priority_adjust(self):
req = Request('http://www.scrapytest.org/503')
rsp = Response('http://www.scrapytest.org/503', body='', status=503)
req2 = self.mw.process_response(req, rsp, self.spider)
assert req2.priority < req.priority
def test_404(self):
req = Request('http://www.scrapytest.org/404')
rsp = Response('http://www.scrapytest.org/404', body='', status=404)
# dont retry 404s
assert self.mw.process_response(req, rsp, self.spider) is rsp
def test_dont_retry(self):
req = Request('http://www.scrapytest.org/503',
meta={'dont_retry': True})
rsp = Response('http://www.scrapytest.org/503', body='', status=503)
# first retry
r = self.mw.process_response(req, rsp, self.spider)
assert r is rsp
def test_dont_retry_exc(self):
req = Request('http://www.scrapytest.org/503',
meta={'dont_retry': True})
rsp = Response('http://www.scrapytest.org/503', body='', status=503)
r = self.mw.process_exception(req, DNSLookupError(), self.spider)
assert r is None
def test_503(self):
req = Request('http://www.scrapytest.org/503')
rsp = Response('http://www.scrapytest.org/503', body='', status=503)
# first retry
req = self.mw.process_response(req, rsp, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 1)
# second retry
req = self.mw.process_response(req, rsp, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 2)
# discard it
assert self.mw.process_response(req, rsp, self.spider) is rsp
def test_twistederrors(self):
for exc in (ServerTimeoutError, DNSLookupError, ConnectionRefusedError,
ConnectionDone, ConnectError, ConnectionLost):
req = Request('http://www.scrapytest.org/%s' % exc.__name__)
self._test_retry_exception(req, exc())
def _test_retry_exception(self, req, exception):
# first retry
req = self.mw.process_exception(req, exception, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 1)
# second retry
req = self.mw.process_exception(req, exception, self.spider)
assert isinstance(req, Request)
self.assertEqual(req.meta['retry_times'], 2)
# discard it
req = self.mw.process_exception(req, exception, self.spider)
self.assertEqual(req, None)
