Fix for the empty white list in the configuration (#57)

Author: mazhurin

src/baskerville/models/config.py

@@ -270,7 +270,7 @@ class EngineConfig(Config):
     sliding_window = 360
     low_rate_attack_period = [600, 3600]
     low_rate_attack_total_request = [400, 2000]
-    white_list = []
+    white_list = None
 
     def __init__(self, config, parent=None):
         super(EngineConfig, self).__init__(config, parent)

src/baskerville/models/pipeline_tasks/tasks.py

@@ -1254,8 +1254,9 @@ def __init__(self, config, steps=()):
 
     def initialize(self):
         # super(SaveStats, self).initialize()
-        self.df_white_list = self.spark.createDataFrame(
-            [[ip] for ip in self.config.engine.white_list], ['ip']).withColumn('white_list', F.lit(1))
+        if self.config.engine.white_list:
+            self.df_white_list = self.spark.createDataFrame([[ip] for ip in self.config.engine.white_list],
+                                                            ['ip']).withColumn('white_list', F.lit(1))
 
     def classify_anomalies(self):
         self.logger.info('Anomaly thresholding...')
@@ -1327,6 +1328,8 @@ def detect_low_rate_attack(self, df):
         return df
 
     def apply_white_list(self, df):
+        if not self.df_white_list:
+            return df
         df = df.join(self.df_white_list, on='ip', how='left')
         white_listed = df.where((F.col('white_list') == 1) & (F.col('prediction') == 1))
         if white_listed.count() > 0: