Fix bugs with database file handling.

src/nlsdn/server/config.py

@@ -279,8 +279,13 @@ class NlSdnConfig(ConfigSection):
             self.dbfile = jsonblob["dbfile"]
         else:
             self.dbfile = "/var/lib/nlsdn/db.json"
-        if not os.access(self.dbfile,os.W_OK | os.R_OK):
+        if os.path.exists(self.dbfile) \
+          and not os.access(self.dbfile,os.W_OK | os.R_OK):
             raise ConfigError(
                 "cannot read/write nlsdn dbfile '%s'" % (self.dbfile,))
+        elif not os.path.exists(os.path.dirname(self.dbfile)) \
+          or not os.access(os.path.dirname(self.dbfile),os.W_OK | os.R_OK):
+            raise ConfigError(
+                "cannot read/write nlsdn dbfile dir '%s'" % (os.path.dirname(self.dbfile),))
         pass
     pass

src/nlsdn/server/sdn.py

 
+import os
 import sys
 import json
 from nlsdn.util import CustomJsonEncoder
@@ -232,15 +233,16 @@ class Engine(object):
 
     def load(self,force=False,ensure=True):
         if self._loaded and not force:
-            return 
-        fd = file(self.path,'r')
+            return
         raw = ""
-        while True:
-            x = fd.read()
-            if not x:
-                break
-            raw += x
-        fd.close()
+        if os.path.exists(self.path):
+            fd = file(self.path,'r')
+            while True:
+                x = fd.read()
+                if not x:
+                    break
+                raw += x
+            fd.close()
         rdb = {}
         if raw != "":
             rdb = json.loads(raw)