def _get_cached_results(page, conn, mode, noskip):
query1 = """SELECT cache_time, cache_queries, cache_process_time,
cache_possible_miss
FROM cache
WHERE cache_id = ?"""
query2 = """SELECT cdata_url, cdata_confidence, cdata_skipped, cdata_excluded
FROM cache_data
WHERE cdata_cache_id = ?"""
cache_id = buffer(sha256(mode + page.get().encode("utf8")).digest())
cursor = conn.cursor()
cursor.execute(query1, (cache_id,))
results = cursor.fetchall()
if not results:
return None
cache_time, queries, check_time, possible_miss = results[0]
if possible_miss and noskip:
return None
if not isinstance(cache_time, datetime):
cache_time = datetime.utcfromtimestamp(cache_time)
if datetime.utcnow() - cache_time > timedelta(days=3):
return None
cursor.execute(query2, (cache_id,))
data = cursor.fetchall()
if not data: # TODO: do something less hacky for this edge case
article_chain = MarkovChain(ArticleTextParser(page.get()).strip())
result = CopyvioCheckResult(False, [], queries, check_time,
article_chain, possible_miss)
result.cached = True
result.cache_time = cache_time.strftime("%b %d, %Y %H:%M:%S UTC")
result.cache_age = _format_date(cache_time)
return result
url, confidence, skipped, excluded = data.pop(0)
if skipped: # Should be impossible: data must be bad; run a new check
return None
result = page.copyvio_compare(url, min_confidence=T_SUSPECT, max_time=30)
if abs(result.confidence - confidence) >= 0.0001:
return None
for url, confidence, skipped, excluded in data:
if noskip and skipped:
return None
source = CopyvioSource(None, url)
source.confidence = confidence
source.skipped = bool(skipped)
source.excluded = bool(excluded)
result.sources.append(source)
result.queries = queries
result.time = check_time
result.possible_miss = possible_miss
result.cached = True
result.cache_time = cache_time.strftime("%b %d, %Y %H:%M:%S UTC")
result.cache_age = _format_date(cache_time)
return result
def enqueue(self, urls, exclude_check=None):
"""Put a list of URLs into the various worker queues.
*exclude_check* is an optional exclusion function that takes a URL and
returns ``True`` if we should skip it and ``False`` otherwise.
"""
for url in urls:
with self._queues.lock:
if url in self._handled_urls:
continue
self._handled_urls.add(url)
source = CopyvioSource(url=url, **self._source_args)
self.sources.append(source)
if exclude_check and exclude_check(url):
self._logger.debug(u"enqueue(): exclude {0}".format(url))
source.excluded = True
source.skip()
continue
if self._short_circuit and self.finished:
self._logger.debug(u"enqueue(): auto-skip {0}".format(url))
source.skip()
continue
try:
key = tldextract.extract(url).registered_domain
except ImportError: # Fall back on very naive method
from urlparse import urlparse
key = u".".join(urlparse(url).netloc.split(".")[-2:])
logmsg = u"enqueue(): {0} {1} -> {2}"
if key in self._queues.sites:
self._logger.debug(logmsg.format("append", key, url))
self._queues.sites[key].append(source)
else:
self._logger.debug(logmsg.format("new", key, url))
self._queues.sites[key] = queue = deque()
queue.append(source)
self._queues.unassigned.put((key, queue))
