/
es.py
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/
es.py
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import settings
from tornadoes import ESConnection
from tornado.httpclient import AsyncHTTPClient
from tornado import gen, escape
from tornado.web import HTTPError
from datetime import date, timedelta, datetime
from IPy import IP
import urllib
import base64
AsyncHTTPClient.configure(None, max_clients=settings.ASYNC_ES_MAX_CLIENT)
class ES:
url = None
index = None
es = None
type_mapping = None
def __init__(self, index=settings.DB_NAME):
self.es = ESConnection()
self.es.httprequest_kwargs['headers'] = {'Connection': 'keep-alive'}
self.es.httprequest_kwargs['request_timeout'] = settings.ES_TIMEOUT
self.index = index
@gen.coroutine
def check_connection(self):
response = yield self.es.get_by_path("/")
if response.code != 200 or not response.body:
raise EnvironmentError
@gen.coroutine
def search(self, mapping, query, extras):
self.type_mapping = mapping
return_data = list()
query_string = {"match_all": {}}
fs = None
# we need a copy to avoid changes to the original query
qq = query.copy()
extra_parameters = self.__parse_extra(extras)
if extra_parameters['limit'] == 0:
raise gen.Return(return_data)
if qq:
qq = self.__parse_query(qq)
query_string = {
"filtered": {
"query": {}
}
}
if 'first_seen_days' in qq:
query_string['filtered'] = {
'filter': {
'range': qq.pop('first_seen_days')
}
}
if 'last_seen_days' in qq:
query_string['filtered'] = {
'filter': {
'range': qq.pop('last_seen_days')
}
}
if 'free_search' in qq:
fs = qq.pop('free_search')
# 'query' can be empty now due to the pop()
if not qq and not fs:
qq = "*"
else:
qq = " AND ".join("%s:%s" % (k, v) for (k, v) in qq.items())
if fs:
qq += " AND ".join(fs)
query_string['filtered']['query'] = {
"query_string": {
"query": qq
}
}
body_query = {
"from": extra_parameters['offset'],
"_source": extra_parameters['fields'],
"query": query_string,
"sort": {extra_parameters['sort']['field']: {"order": extra_parameters['sort']['order'],
"unmapped_type": extra_parameters['sort']['type']}}
}
if settings.DEBUG:
print body_query
print extra_parameters
result = yield self.es.search(index=self.index, type=self.type_mapping, source=body_query,
size=extra_parameters['limit'])
if result.code != 200 or not result.body:
raise HTTPError(status_code=result.code)
result = escape.json_decode(result.body)
if 'hits' in result and 'hits' in result['hits']:
return_data = [h['_source'] for h in result['hits']['hits'] if h['_source']]
else:
# generic error related to ES - shouldn't happen...
raise Exception(result.error)
raise gen.Return(return_data)
@gen.coroutine
def get_last_node(self, mapping):
body_query = {
"sort": {
"last_seen": {
"unmapped_type": "string", "order": "desc"
}
},
"query": {
"match_all": {}
}, "from": 0, "_source": ["*"], "size": 1
}
result = yield self.es.search(index=self.index, type=mapping, source=body_query)
if result.code != 200 or not result.body:
raise HTTPError(status_code=result.code)
result = escape.json_decode(result.body)
if 'hits' in result and 'hits' in result['hits']:
last_seen = result['hits']['hits'][0]['_source']['last_seen']
else:
# generic error related to ES - shouldn't happen...
raise Exception(result.error)
raise gen.Return(last_seen)
def __parse_query(self, q):
if 'as' in q:
q['as_number'] = q.pop('as').split(',')[0]
if q['as_number'][0] != 'a' and q['as_number'][1] != 's':
q['as_number'] = "AS{0}".format(q['as_number'])
if 'flag' in q:
# remove extra flags
q['flags'] = q.pop('flag').title().split(',')[0]
if 'fingerprint' in q:
if len(q['fingerprint']) != 40:
raise HTTPError(status_code=400)
if self.type_mapping == "bridge":
q['hashed_fingerprint'] = q.pop('fingerprint')
if 'running' in q and (q['running'].lower() != "true" and q['running'].lower() != "false"):
raise HTTPError(status_code=400)
if 'family' in q:
q['effective_family'] = q.pop('family')
if 'contact' in q:
q['contact'] = "*{0}*".format(q['contact'])
if 'first_seen_days' in q:
q['first_seen_days'] = self.__extract_range(q['first_seen_days'], 'first_seen')
if 'last_seen_days' in q:
q['last_seen_days'] = self.__extract_range(q['last_seen_days'], 'last_seen')
if 'search' in q:
# not allowed in the 'search' term as a value of a key
forbidden_keys = ['search', 'fingerprint', 'order', 'limit', 'offset', 'fields']
full_search = urllib.unquote(q.pop('search')).decode('utf8').split()
new_se = list()
for s in full_search:
tokenz = s.split(':')
if len(tokenz) == 1:
if self.___is_ip(tokenz[0]):
new_se.append("(or_address:{0} OR dir_address:{0})".format(tokenz[0]))
elif self.__is_fingerprint(tokenz[0]):
fingerprint = self.__transform_fingerprint(tokenz[0])
if fingerprint[0] == "$":
new_se.append("(fingerprint:{0}* OR hashed_fingerprint:{0}*)".format(fingerprint[1:]))
else:
new_se.append("(fingerprint:*{0}* OR hashed_fingerprint:*{0}*)".format(fingerprint))
else:
new_se.append("nickname:*{0}*".format(tokenz[0]))
else:
if tokenz[0] in forbidden_keys:
raise HTTPError(status_code=400)
new_se.append("{0}:{1}".format(tokenz[0], tokenz[1]))
q['free_search'] = new_se
return q
@staticmethod
def __parse_extra(extra):
return_data = {'limit': settings.ES_RESULT_SIZE, 'offset': 0, 'fields': ["*"],
'sort': {'field': None, 'order': 'asc', 'type': 'string'}}
if 'limit' in extra:
# 'limit' cannot go beyond the settings.ES_RESULT_SIZE value
if 0 < int(extra['limit']) < settings.ES_RESULT_SIZE:
return_data['limit'] = int(extra['limit'])
elif int(extra['limit']) <= 0:
return_data['limit'] = 0
if 'offset' in extra and int(extra['offset']) > 0:
return_data['offset'] = int(extra['offset'])
# offset + limit must be <= settings.ES_RESULT_SIZE
if (return_data['offset'] + return_data['limit']) > settings.ES_RESULT_SIZE:
return_data['limit'] -= return_data['offset']
if 'fields' in extra:
return_data['fields'] = extra['fields'].split(',')
if 'order' in extra:
field = extra['order']
if extra['order'][0] == "-":
return_data['sort']['order'] = "desc"
field = extra['order'][1:]
return_data['sort']['field'] = field
return return_data
@staticmethod
def __extract_range(val, field):
drange = val.split('-')
# malformed range
if len(drange) > 2:
raise HTTPError(status_code=400)
start_days = 0
end_days = 0
try:
if len(drange) == 1:
# print "X"
start_days = int(drange[0])
end_days = start_days
elif len(drange) == 2:
if drange[0] == '':
# print "-X"
end_days = int(drange[1])
elif drange[1] == '':
# print "X-"
start_days = int(drange[0])
end_days = datetime(1970, 1, 1).days
else:
# print "X-Y"
start_days = int(drange[0])
end_days = int(drange[1])
except ValueError:
raise HTTPError(status_code=400)
if start_days > end_days:
raise HTTPError(status_code=400)
d1 = date.today() - timedelta(days=start_days)
d2 = date.today() - timedelta(days=end_days)
query_range = {
field: {
'gte': d2.strftime("%Y-%m-%d") + " 00:00:00",
'lte': d1.strftime("%Y-%m-%d") + " 23:59:59"
}
}
return query_range
@staticmethod
def ___is_ip(ip):
try:
IP(ip)
return True
except ValueError:
return False
@staticmethod
def __is_fingerprint(s):
try:
# if it's base64 then it's an encoded fingerprint
base64.b64decode(s + "==")
# or it can be an hex string
int(s, 16)
return True
except (TypeError, ValueError):
return False
@staticmethod
def __transform_fingerprint(fingerprint):
# if it's already hex we don't need to transform it
try:
int(fingerprint, 16)
return fingerprint
except ValueError:
pass
# we assume that 'fingerprint' is a valid base64 string
return base64.b64decode(fingerprint + "==")