def connected(self):
try:
self.redis_client.ping()
return True
except:
logger.exception('connect to redis failed!')
return False
def produce(self):
# mongodb with multipleprocessing must be init after fork
self.mongo_handle = MongoUtils(db=self.__mongo_db)
if not self.redis_handle.connected or not self.mongo_handle.connected:
logger.error('no redis/mongodb connection found! exit.')
return
while True:
try:
_, req = self.redis_handle.fetch_one_result()
with self.context['lock']:
self.context['result_counts'].value -= 1
logger.debug('got req, %d results left' %
self.context['result_counts'].value)
self.proc_req(req)
except:
logger.exception('produce exception!')
if not self.redis_handle.connected:
logger.error('redis disconnected! reconnecting...')
self.redis_handle.connect()
if not self.mongo_handle.connected:
logger.error('mongodb disconnected! reconnecting...')
self.mongo_handle.connect()
time.sleep(10)
finally:
with self.context['lock']:
if self.context['result_counts'].value == 0:
if self.context[
'live_spider_counts'].value == 0 and self.context[
'task_counts'].value == 0:
self.context['task_done'].set()
def connect(self):
try:
self.redis_client = redis.StrictRedis(host=RedisConf.host,
port=RedisConf.port,
db=self.db,
password=RedisConf.password,
socket_keepalive=True)
except:
logger.exception('connect redis failed!')
def proc_req(self, req):
try:
data = json.loads(req)
except:
logger.exception('json loads req error: %s' % req)
return
urlstring = data.get('url', '')
if not urlstring:
logger.error('empty url found!')
return
url = URL(urlstring)
method = data.get('method', '')
if not method:
logger.error('not method found!')
return
# save to mongodb
data.update({
'pattern': url.pattern,
'hostname': url.hostname,
'domain': url.domain
})
target = self.redis_handle.is_target(url)
if not self.redis_handle.is_url_saved(method, url):
logger.debug('redis saved pattern not found!')
self.mongo_handle.save(data, is_target=target)
self.redis_handle.set_url_saved(method, url)
else:
logger.debug('redis saved pattern found!')
if not target:
logger.debug('%s is not target' % url.hostname)
return
# todo post req
if method == 'POST':
logger.debug('POST not support now')
elif method == 'GET':
# new host found, add index page to task queue
if self.redis_handle.get_hostname_reqcount(url.hostname) == 0:
self.create_task_from_url(URL(url.index_page),
add_whitelist=False)
# check url validation inside create_url_task
self.create_task_from_url(url, add_whitelist=False)
else:
# not GET nor POST
logger.error('HTTP Verb %s found!' % method)
logger.debug(data)
def consume(self):
if not self.redis_handle.connected:
logger.error('no redis connection found in consumer! exit.')
return
while True:
try:
url = self.redis_handle.fetch_one_task()
with self.context['lock']:
self.context['live_spider_counts'].value += 1
self.context['task_counts'].value -= 1
logger.info('get task url: %s' % url)
logger.info('%d tasks left' %
self.context['task_counts'].value)
if not self.redis_handle.is_blocked(URL(url)):
self.start_spider(url, self.__cookie_file)
except:
logger.exception('consumer exception!')
if not self.redis_handle.connected:
logger.error('redis disconnected! reconnecting...')
self.redis_handle.connect()
time.sleep(10)
finally:
with self.context['lock']:
self.context['live_spider_counts'].value -= 1
def spider(self):
if not self._url:
logger.info('incorrect url format found!')
return []
# fptr, spiderfile = tempfile.mkstemp()
if not os.path.exists(TMPDIR_PATH):
os.mkdir(TMPDIR_PATH)
spiderfile = os.path.join(TMPDIR_PATH, uuid.uuid4().hex)
crawler_file = os.path.join(SPIDER_PATH, 'casper_crawler.js')
command = 'casperjs --ignore-ssl-errors=true --ssl-protocol=any ' \
'{cmd} "{url}" --output="{file}"'.format(cmd=crawler_file, url=self._url, file=spiderfile)
if self._cookie_file:
command += ' --cookie={0}'.format(self._cookie_file)
try:
proc = subprocess.Popen(command, shell=True)
start = datetime.now()
while proc.poll() is None:
time.sleep(1)
now = datetime.now()
if (now - start).seconds > CASPERJS_TIMEOUT:
os.kill(proc.pid, signal.SIGKILL)
os.waitpid(-1, os.WNOHANG)
logger.error('casperjs execution timeout. killed.')
break
except:
logger.exception('casperjs execution failed!')
if not os.path.exists(spiderfile):
logger.error('no spider result file found!')
return []
fingerprints = []
# with os.fdopen(fptr) as f:
with open(spiderfile) as f:
for line in f:
line = line.strip()
try:
request = json.loads(line)
method = request['method'].upper()
url = request['url']
postdata = request.get('postData', '')
type_ = request['type']
headers = {}
for header in request['headers']:
headers[header['name']] = header['value']
headers.pop('Content-Length', '')
headers.pop('User-Agent', '')
headers.pop('Accept', '')
except:
logger.exception('json.loads failed!')
continue
# check urls fingerprint
fp = '%s|%s' % (method, url)
if fp in fingerprints:
continue
fingerprints.append(fp)
data = {
'method': method,
'url': url,
'postdata': postdata,
'headers': headers,
'type': type_
}
# print json.dumps(data)
self._results.append(json.dumps(data))
os.unlink(spiderfile)
if self._outfile:
with open(self._outfile, 'w') as f:
for url in self._results:
f.write(url + '\n')
return self._results