def test_that_adding_uris_works(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = MultipleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
next_crawl_date = now + timedelta(days=1)
curi = CrawlUri("http://localhost")
curi.rep_header = {"Etag": "123", "Date": serialize_date_time(now)}
curi.current_priority = 2
frontier.add_uri(curi)
cur = frontier._front_end_queues._cursor
curi = CrawlUri("http://foreignhost")
curi.rep_header = {"Etag": "123", "Date": serialize_date_time(now)}
curi.current_priority = 1
frontier.add_uri(curi)
idents = {"localhost": -1, "foreignhost": -1}
cur.execute("SELECT * FROM queue_identifiers")
for row in cur:
self.assertTrue(row['identifier'] in idents.keys())
idents["http://%s" % row['identifier']] = row['queue']
cur.execute("SELECT * FROM queues")
for row in cur:
self.assertEqual(idents[row['url']], row['queue'])
self.assertEqual(2, frontier._front_end_queues.get_queue_count())
def test_that_adding_uris_works(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = MultipleHostFrontier(s, StreamHandler(sys.stdout))
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
next_crawl_date = now + timedelta(days=1)
curi = CrawlUri("http://localhost")
curi.rep_header = { "Etag" : "123", "Date" : serialize_date_time(now) }
curi.current_priority = 2
frontier.add_uri(curi)
cur = frontier._front_end_queues._cursor
curi = CrawlUri("http://foreignhost")
curi.rep_header = { "Etag" : "123", "Date" : serialize_date_time(now) }
curi.current_priority = 1
frontier.add_uri(curi)
idents = {"localhost": -1, "foreignhost": -1}
cur.execute("SELECT * FROM queue_identifiers")
for row in cur:
self.assertTrue(row['identifier'] in idents.keys())
idents["http://%s" % row['identifier']] = row['queue']
cur.execute("SELECT * FROM queues")
for row in cur:
self.assertEqual(idents[row['url']], row['queue'])
self.assertEqual(2, frontier._front_end_queues.get_queue_count())
def test_crawluri_from_uri_with_credentials(self):
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
now_timestamp = time.mktime(now.timetuple())
next_crawl_date = now + timedelta(days=1)
next_crawl_date_timestamp = time.mktime(next_crawl_date.timetuple())
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = AbstractBaseFrontier(
s, StreamHandler(sys.stdout),
SQLiteSingleHostUriQueue(s.FRONTIER_STATE_FILE),
SimpleTimestampPrioritizer(s))
uri = ("http://*****:*****@localhost", "123", now_timestamp, 1,
next_crawl_date_timestamp)
curi = frontier._crawluri_from_uri(uri)
self.assertEqual("http://*****:*****@localhost", curi.url)
self.assertEqual("123", curi.req_header["Etag"])
self.assertEqual(serialize_date_time(now),
curi.req_header["Last-Modified"])
self.assertEqual("user", curi.optional_vars[CURI_SITE_USERNAME])
self.assertEqual("passwd", curi.optional_vars[CURI_SITE_PASSWORD])
def test_sinks(self):
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = AbstractBaseFrontier(
s, StreamHandler(sys.stdout),
SQLiteSingleHostUriQueue(s.FRONTIER_STATE_FILE),
SimpleTimestampPrioritizer(s))
frontier.add_sink(AbstractCrawlUriSink())
curi = CrawlUri("http://localhost")
curi.rep_header = {"Etag": "123", "Date": serialize_date_time(now)}
curi.current_priority = 2
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_successful_crawl(curi)
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_not_found(curi)
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_redirect(curi)
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_server_error(curi)
def test_crawluri_from_uri_with_credentials(self):
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
now_timestamp = time.mktime(now.timetuple())
next_crawl_date = now + timedelta(days=1)
next_crawl_date_timestamp = time.mktime(next_crawl_date.timetuple())
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = AbstractBaseFrontier(s, StreamHandler(sys.stdout),
SQLiteSingleHostUriQueue(s.FRONTIER_STATE_FILE),
SimpleTimestampPrioritizer(s))
uri = ("http://*****:*****@localhost", "123", now_timestamp, 1,
next_crawl_date_timestamp)
curi = frontier._crawluri_from_uri(uri)
self.assertEqual("http://*****:*****@localhost", curi.url)
self.assertEqual("123", curi.req_header["Etag"])
self.assertEqual(serialize_date_time(now),
curi.req_header["Last-Modified"])
self.assertEqual("user", curi.optional_vars[CURI_SITE_USERNAME])
self.assertEqual("passwd", curi.optional_vars[CURI_SITE_PASSWORD])
def test_sinks(self):
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = AbstractBaseFrontier(s, StreamHandler(sys.stdout),
SQLiteSingleHostUriQueue(s.FRONTIER_STATE_FILE),
SimpleTimestampPrioritizer(s))
frontier.add_sink(AbstractCrawlUriSink())
curi = CrawlUri("http://localhost")
curi.rep_header = { "Etag" : "123", "Date" : serialize_date_time(now) }
curi.current_priority = 2
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_successful_crawl(curi)
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_not_found(curi)
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_redirect(curi)
frontier._add_to_heap(frontier._uri_from_curi(curi), 0)
frontier.process_server_error(curi)
def test_that_updating_heap_works(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = SingleHostFrontier(s, StreamHandler(sys.stdout))
q1 = []
q2 = []
now = datetime(
*datetime.fromtimestamp(time.time()).timetuple()[0:6]) - timedelta(
days=2)
for i in range(1, 20):
curi = CrawlUri("http://localhost/test/%s" % i)
curi.current_priority = (i % 2 + 1)
curi.rep_header = {
"Etag": "123%s" % i,
"Date": serialize_date_time(now)
}
frontier.add_uri(curi)
if i % 2 == 0:
(url, etag, mod_date, next_date,
prio) = frontier._uri_from_curi(curi)
next_date = next_date - 1000 * 60 * 5
frontier._front_end_queues.update_uri(
(url, etag, mod_date, next_date, prio))
q2.append(curi.url)
else:
q1.append(curi.url)
self.assertRaises(Empty, frontier._heap.get_nowait)
for i in range(1, 10):
frontier._next_possible_crawl = time.time()
candidate_uri = frontier.get_next()
if candidate_uri.url in q1:
self.assertTrue(candidate_uri.url in q1)
q1.remove(candidate_uri.url)
elif candidate_uri.url in q2:
self.assertTrue(candidate_uri.url in q2)
q2.remove(candidate_uri.url)
self.assertEqual(10, len(q1))
self.assertEqual(0, len(q2))
self.assertRaises(Empty, frontier.get_next)
def test_that_updating_heap_works(self):
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
frontier = SingleHostFrontier(s, StreamHandler(sys.stdout))
q1 = []
q2 = []
now = datetime(*datetime.fromtimestamp(
time.time()).timetuple()[0:6]) - timedelta(days=2)
for i in range(1, 20):
curi = CrawlUri("http://localhost/test/%s" % i)
curi.current_priority = (i % 2 + 1)
curi.rep_header = { "Etag" : "123%s" % i, "Date" : serialize_date_time(now) }
frontier.add_uri(curi)
if i % 2 == 0:
(url, etag, mod_date, next_date, prio) = frontier._uri_from_curi(curi)
next_date = next_date - 1000 * 60 * 5
frontier._front_end_queues.update_uri((url, etag, mod_date,
next_date, prio))
q2.append(curi.url)
else:
q1.append(curi.url)
self.assertRaises(Empty, frontier._heap.get_nowait)
for i in range(1, 10):
frontier._next_possible_crawl = time.time()
candidate_uri = frontier.get_next()
if candidate_uri.url in q1:
self.assertTrue(candidate_uri.url in q1)
q1.remove(candidate_uri.url)
elif candidate_uri.url in q2:
self.assertTrue(candidate_uri.url in q2)
q2.remove(candidate_uri.url)
self.assertEqual(10, len(q1))
self.assertEqual(0, len(q2))
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_fetching_last_modified_works(self):
settings = Settings()
fetcher = FetchProcessor(settings, io_loop=self._io_loop)
worker = AsyncZmqWorker( self._worker_sockets['worker_pull'],
self._worker_sockets['worker_pub'],
self._mgmt,
fetcher,
StreamHandler(sys.stdout),
logging.DEBUG,
self._io_loop)
worker.start()
mtimestamp = datetime.fromtimestamp(os.stat(os.path.join(self._path,
"robots.txt")).st_mtime)
mtime = serialize_date_time(mtimestamp)
curi = CrawlUri(url="http://localhost:%s/robots.txt" % self.port,
effective_url="http://127.0.0.1:%s/robots.txt" % self.port,
req_header = { "Last-Modified" :
mtime }
)
msg = DataMessage()
msg.identity = "me"
msg.curi = curi
def assert_expected_result_and_stop(raw_msg):
msg = DataMessage(raw_msg)
self.assertEqual(304, msg.curi.status_code)
self.assertEqual("", msg.curi.content_body)
death = MgmtMessage(topic=ZMQ_SPYDER_MGMT_WORKER,
data=ZMQ_SPYDER_MGMT_WORKER_QUIT)
self._mgmt_sockets['master_pub'].send_multipart(death.serialize())
self._worker_sockets['master_sub'].on_recv(assert_expected_result_and_stop)
self._worker_sockets['master_push'].send_multipart(msg.serialize())
self._io_loop.start()
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 _crawluri_from_uri(self, uri):
"""
Convert an URI tuple to a :class:`CrawlUri`.
Replace the hostname with the real IP in order to cache DNS queries.
"""
(url, etag, mod_date, _next_date, prio) = uri
parsed_url = urlparse(url)
# dns resolution and caching
port = parsed_url.port
if not port:
port = PROTOCOLS_DEFAULT_PORT[parsed_url.scheme]
effective_netloc = self._dns_cache["%s:%s" % (parsed_url.hostname,
port)]
curi = CrawlUri(url)
curi.effective_url = url.replace(parsed_url.netloc, "%s:%s" %
effective_netloc)
curi.current_priority = prio
curi.req_header = dict()
if etag:
curi.req_header["Etag"] = etag
if mod_date:
mod_date_time = datetime.fromtimestamp(mod_date)
curi.req_header["Last-Modified"] = serialize_date_time(
mod_date_time)
curi.optional_vars = dict()
if parsed_url.username and parsed_url.password:
curi.optional_vars[CURI_SITE_USERNAME] = \
parsed_url.username.encode()
curi.optional_vars[CURI_SITE_PASSWORD] = \
parsed_url.password.encode()
return curi
def _crawluri_from_uri(self, uri):
"""
Convert an URI tuple to a :class:`CrawlUri`.
Replace the hostname with the real IP in order to cache DNS queries.
"""
(url, etag, mod_date, _next_date, prio) = uri
parsed_url = urlparse(url)
# dns resolution and caching
port = parsed_url.port
if not port:
port = PROTOCOLS_DEFAULT_PORT[parsed_url.scheme]
effective_netloc = self._dns_cache["%s:%s" %
(parsed_url.hostname, port)]
curi = CrawlUri(url)
curi.effective_url = url.replace(parsed_url.netloc,
"%s:%s" % effective_netloc)
curi.current_priority = prio
curi.req_header = dict()
if etag:
curi.req_header["Etag"] = etag
if mod_date:
mod_date_time = datetime.fromtimestamp(mod_date)
curi.req_header["Last-Modified"] = serialize_date_time(
mod_date_time)
curi.optional_vars = dict()
if parsed_url.username and parsed_url.password:
curi.optional_vars[CURI_SITE_USERNAME] = \
parsed_url.username.encode()
curi.optional_vars[CURI_SITE_PASSWORD] = \
parsed_url.password.encode()
return curi
def test_adding_uri_works(self):
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
next_crawl_date = now + timedelta(days=1)
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
curi = CrawlUri("http://localhost")
curi.rep_header = { "Etag" : "123", "Date" : serialize_date_time(now) }
curi.current_priority = 2
frontier = AbstractBaseFrontier(s, StreamHandler(sys.stdout),
SQLiteSingleHostUriQueue(s.FRONTIER_STATE_FILE),
SimpleTimestampPrioritizer(s))
frontier.add_uri(curi)
for uri in frontier._front_end_queues.queue_head():
(url, etag, mod_date, queue, next_date) = uri
self.assertEqual("http://localhost", url)
self.assertEqual("123", etag)
self.assertEqual(now, datetime.fromtimestamp(mod_date))
frontier._current_uris[url] = uri
def test_fetching_last_modified_works(self):
settings = Settings()
fetcher = FetchProcessor(settings, io_loop=self._io_loop)
worker = AsyncZmqWorker(self._worker_sockets['worker_pull'],
self._worker_sockets['worker_pub'], self._mgmt,
fetcher, StreamHandler(sys.stdout),
logging.DEBUG, self._io_loop)
worker.start()
mtimestamp = datetime.fromtimestamp(
os.stat(os.path.join(self._path, "robots.txt")).st_mtime)
mtime = serialize_date_time(mtimestamp)
curi = CrawlUri(url="http://localhost:%s/robots.txt" % self.port,
effective_url="http://127.0.0.1:%s/robots.txt" %
self.port,
req_header={"Last-Modified": mtime})
msg = DataMessage()
msg.identity = "me"
msg.curi = curi
def assert_expected_result_and_stop(raw_msg):
msg = DataMessage(raw_msg)
self.assertEqual(304, msg.curi.status_code)
self.assertEqual("", msg.curi.content_body)
death = MgmtMessage(topic=ZMQ_SPYDER_MGMT_WORKER,
data=ZMQ_SPYDER_MGMT_WORKER_QUIT)
self._mgmt_sockets['master_pub'].send_multipart(death.serialize())
self._worker_sockets['master_sub'].on_recv(
assert_expected_result_and_stop)
self._worker_sockets['master_push'].send_multipart(msg.serialize())
self._io_loop.start()
def test_adding_uri_works(self):
now = datetime(*datetime.fromtimestamp(time.time()).timetuple()[0:6])
next_crawl_date = now + timedelta(days=1)
s = Settings()
s.FRONTIER_STATE_FILE = ":memory:"
curi = CrawlUri("http://localhost")
curi.rep_header = {"Etag": "123", "Date": serialize_date_time(now)}
curi.current_priority = 2
frontier = AbstractBaseFrontier(
s, StreamHandler(sys.stdout),
SQLiteSingleHostUriQueue(s.FRONTIER_STATE_FILE),
SimpleTimestampPrioritizer(s))
frontier.add_uri(curi)
for uri in frontier._front_end_queues.queue_head():
(url, etag, mod_date, queue, next_date) = uri
self.assertEqual("http://localhost", url)
self.assertEqual("123", etag)
self.assertEqual(now, datetime.fromtimestamp(mod_date))
frontier._current_uris[url] = uri
