def test_with_multiple_active_queues(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
s.FRONTIER_ACTIVE_QUEUES = 2
s.FRONTIER_QUEUE_BUDGET = 4
s.FRONTIER_QUEUE_BUDGET_PUNISH = 5
frontier = MultipleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
curi1 = CrawlUri("http://localhost")
curi1.current_priority = 2
curi1.req_time = 0.4
frontier.add_uri(curi1)
cur = frontier._front_end_queues._cursor
curi2 = CrawlUri("http://www.google.de")
curi2.current_priority = 1
curi2.req_time = 1.4
frontier.add_uri(curi2)
self.assertEqual(0, len(frontier._current_queues))
frontier._maybe_add_queues()
self.assertEqual(2, len(frontier._current_queues))
next_url = frontier.get_next()
def test_with_multiple_active_queues(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
s.FRONTIER_ACTIVE_QUEUES = 2
s.FRONTIER_QUEUE_BUDGET = 4
s.FRONTIER_QUEUE_BUDGET_PUNISH = 5
frontier = MultipleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
curi1 = CrawlUri("http://localhost")
curi1.current_priority = 2
curi1.req_time = 0.4
frontier.add_uri(curi1)
cur = frontier._front_end_queues._cursor
curi2 = CrawlUri("http://www.google.de")
curi2.current_priority = 1
curi2.req_time = 1.4
frontier.add_uri(curi2)
self.assertEqual(0, len(frontier._current_queues))
frontier._maybe_add_queues()
self.assertEqual(2, len(frontier._current_queues))
next_url = frontier.get_next()
def test_that_time_based_politeness_works(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = SingleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(
time.time()).timetuple()[0:6]) - timedelta(days=2)
curi = CrawlUri("http://localhost/test")
curi.current_priority = 3
curi.rep_header = { "Etag" : "123", "Date" : serialize_date_time(now) }
curi.req_time = 0.5
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
a = frontier._next_possible_crawl
frontier.process_successful_crawl(curi)
self.assertTrue(frontier._next_possible_crawl > a)
self.assertTrue(frontier._next_possible_crawl > time.time())
self.assertRaises(Empty, frontier.get_next)
def test_that_time_based_politeness_works(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = SingleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(
*datetime.fromtimestamp(time.time()).timetuple()[0:6]) - timedelta(
days=2)
curi = CrawlUri("http://localhost/test")
curi.current_priority = 3
curi.rep_header = {"Etag": "123", "Date": serialize_date_time(now)}
curi.req_time = 0.5
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
a = frontier._next_possible_crawl
frontier.process_successful_crawl(curi)
self.assertTrue(frontier._next_possible_crawl > a)
self.assertTrue(frontier._next_possible_crawl > time.time())
self.assertRaises(Empty, frontier.get_next)
def test_queues_work(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
s.FRONTIER_ACTIVE_QUEUES = 1
s.FRONTIER_QUEUE_BUDGET = 4
s.FRONTIER_QUEUE_BUDGET_PUNISH = 5
frontier = MultipleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
curi1 = CrawlUri("http://localhost")
curi1.current_priority = 2
curi1.req_time = 0.4
frontier.add_uri(curi1)
cur = frontier._front_end_queues._cursor
curi2 = CrawlUri("http://foreignhost")
curi2.current_priority = 1
curi2.req_time = 1.4
frontier.add_uri(curi2)
self.assertEqual(0, len(frontier._current_queues))
frontier._maybe_add_queues()
self.assertEqual(1, len(frontier._current_queues))
for q1 in frontier._current_queues.keys():
pass
self.assertEquals(4, frontier._budget_politeness[q1])
frontier._cleanup_budget_politeness()
self.assertEquals(4, frontier._budget_politeness[q1])
frontier._update_heap()
self.assertEqual(1, len(frontier._current_queues))
if q1 == 1:
curi1.status_code = 500
frontier.process_server_error(curi1)
else:
curi1.status_code = 500
frontier.process_server_error(curi2)
self.assertEquals(-1, frontier._budget_politeness[q1])
frontier._cleanup_budget_politeness()
self.assertEqual(1, len(frontier._current_queues))
for q2 in frontier._current_queues.keys():
pass
self.assertEquals(4, frontier._budget_politeness[q2])
frontier._cleanup_budget_politeness()
self.assertEquals(4, frontier._budget_politeness[q2])
frontier._update_heap()
self.assertEqual(1, len(frontier._current_queues))
if q2 == 1:
curi1.status_code = 200
frontier.process_successful_crawl(curi1)
else:
curi2.status_code = 200
frontier.process_successful_crawl(curi2)
self.assertEquals(3, frontier._budget_politeness[q2])
frontier._cleanup_budget_politeness()
def test_queues_work(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
s.FRONTIER_ACTIVE_QUEUES = 1
s.FRONTIER_QUEUE_BUDGET = 4
s.FRONTIER_QUEUE_BUDGET_PUNISH = 5
frontier = MultipleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
curi1 = CrawlUri("http://localhost")
curi1.current_priority = 2
curi1.req_time = 0.4
frontier.add_uri(curi1)
cur = frontier._front_end_queues._cursor
curi2 = CrawlUri("http://foreignhost")
curi2.current_priority = 1
curi2.req_time = 1.4
frontier.add_uri(curi2)
self.assertEqual(0, len(frontier._current_queues))
frontier._maybe_add_queues()
self.assertEqual(1, len(frontier._current_queues))
for q1 in frontier._current_queues.keys():
pass
self.assertEquals(4, frontier._budget_politeness[q1])
frontier._cleanup_budget_politeness()
self.assertEquals(4, frontier._budget_politeness[q1])
frontier._update_heap()
self.assertEqual(1, len(frontier._current_queues))
if q1 == 1:
curi1.status_code = 500
frontier.process_server_error(curi1)
else:
curi1.status_code = 500
frontier.process_server_error(curi2)
self.assertEquals(-1, frontier._budget_politeness[q1])
frontier._cleanup_budget_politeness()
self.assertEqual(1, len(frontier._current_queues))
for q2 in frontier._current_queues.keys():
pass
self.assertEquals(4, frontier._budget_politeness[q2])
frontier._cleanup_budget_politeness()
self.assertEquals(4, frontier._budget_politeness[q2])
frontier._update_heap()
self.assertEqual(1, len(frontier._current_queues))
if q2 == 1:
curi1.status_code = 200
frontier.process_successful_crawl(curi1)
else:
curi2.status_code = 200
frontier.process_successful_crawl(curi2)
self.assertEquals(3, frontier._budget_politeness[q2])
frontier._cleanup_budget_politeness()
