(ids) check for existing rulecache before read

src/opnsense/scripts/suricata/lib/rulecache.py

@@ -165,6 +165,7 @@ class RuleCache(object):
         :return: dict
         """
         result = {'rows':[]}
+        if os.path.exists(self.cachefile):
             db = sqlite3.connect(self.cachefile)
             cur = db.cursor()
 
@@ -233,6 +234,7 @@ class RuleCache(object):
         :return: list of installed classtypes
         """
         result = []
+        if os.path.exists(self.cachefile):
             db = sqlite3.connect(self.cachefile)
             cur = db.cursor()
             cur.execute('select distinct classtype from rules')
@@ -240,3 +242,5 @@ class RuleCache(object):
                 result.append(record[0])
 
             return sorted(result)
+        else:
+            return result