Extra checks on JSON files downloaded

hblink.py

@@ -1389,12 +1389,16 @@ def try_download(_path, _file, _url, _stale,):
         except IOError:
             result = 'ID ALIAS MAPPER: \'{}\' could not be downloaded due to an IOError'.format(_file)
         else:
-            try:
-                with open(_path+_file, 'wb') as outfile:
-                    outfile.write(data)
-                    outfile.close()
-            except IOError:
-                result = 'ID ALIAS mapper \'{}\' file could not be written due to an IOError'.format(_file)
+            if data and (data != b'{}'):
+                try:
+                    with open(_path+_file, 'wb') as outfile:
+                        outfile.write(data)
+                        outfile.close()
+                except IOError:
+                    result = 'ID ALIAS mapper \'{}\' file could not be written due to an IOError'.format(_file)
+            else:
+                result = 'ID ALIAS mapper \'{}\' file not written because downloaded data is empty for some reason'.format(_file)
+                
     else:
         result = 'ID ALIAS MAPPER: \'{}\' is current, not downloaded'.format(_file)
     
@@ -1417,6 +1421,11 @@ def mk_server_dict(path,filename):
 # ID ALIAS CREATION
 # Download
 def mk_aliases(_config):
+    peer_ids = {}
+    subscriber_ids = {}
+    local_subscriber_ids = {}
+    talkgroup_ids = {}
+    server_ids = {}
     if _config['ALIASES']['TRY_DOWNLOAD'] == True:
         # Try updating peer aliases file
         result = try_download(_config['ALIASES']['PATH'], _config['ALIASES']['PEER_FILE'], _config['ALIASES']['PEER_URL'], _config['ALIASES']['STALE_TIME'])
@@ -1431,30 +1440,50 @@ def mk_aliases(_config):
         result = try_download(_config['ALIASES']['PATH'], _config['ALIASES']['SERVER_ID_FILE'], _config['ALIASES']['SERVER_ID_URL'], _config['ALIASES']['STALE_TIME'])
         logger.info('(ALIAS) %s', result)
         
-        
-
     # Make Dictionaries
-    peer_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['PEER_FILE'])
-    if peer_ids:
-        logger.info('(ALIAS) ID ALIAS MAPPER: peer_ids dictionary is available')
-
-    subscriber_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['SUBSCRIBER_FILE'])
-    #Add special IDs to DB
-    subscriber_ids[900999] = 'D-APRS'
-    subscriber_ids[4294967295] = 'SC'
-
-    if subscriber_ids:
-        logger.info('(ALIAS) ID ALIAS MAPPER: subscriber_ids dictionary is available')
-
-    talkgroup_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['TGID_FILE'])
-    if talkgroup_ids:
-        logger.info('(ALIAS) ID ALIAS MAPPER: talkgroup_ids dictionary is available')
+    try:
+        _peer_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['PEER_FILE'])
+    except Exception as e:
+        logger.error('(ALIAS) ID ALIAS MAPPER: problem with data in peer_ids dictionary, not updating: %s',e)
+    else:
+        peer_ids = _peer_ids
+        if peer_ids:
+            logger.info('(ALIAS) ID ALIAS MAPPER: peer_ids dictionary is available')
 
-    local_subscriber_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['LOCAL_SUBSCRIBER_FILE'])
-    if subscriber_ids:
-        logger.info('(ALIAS) ID ALIAS MAPPER: local_subscriber_ids dictionary is available')
+    try:
+        _subscriber_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['SUBSCRIBER_FILE'])
+    except Exception as e:
+        logger.info('(ALIAS) ID ALIAS MAPPER: problem with data in subscriber_ids dictionary, not updating: %s',e)
+    else:
+        subscriber_ids = _subscriber_ids
+        #Add special IDs to DB
+        subscriber_ids[900999] = 'D-APRS'
+        subscriber_ids[4294967295] = 'SC'
 
-    server_ids = mk_server_dict(_config['ALIASES']['PATH'], _config['ALIASES']['SERVER_ID_FILE'])
+        if subscriber_ids:
+            logger.info('(ALIAS) ID ALIAS MAPPER: subscriber_ids dictionary is available')
+    try:
+        _talkgroup_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['TGID_FILE'])
+    except Exception as e:
+        logger.info('(ALIAS) ID ALIAS MAPPER: problem with data in talkgroup_ids dictionary, not updating: %s',e)
+    else:
+        talkgroup_ids = _talkgroup_ids
+        if talkgroup_ids:
+            logger.info('(ALIAS) ID ALIAS MAPPER: talkgroup_ids dictionary is available')
+    try:   
+        _local_subscriber_ids = mk_id_dict(_config['ALIASES']['PATH'], _config['ALIASES']['LOCAL_SUBSCRIBER_FILE'])
+    except Exception as e:
+        logger.info('(ALIAS) ID ALIAS MAPPER: problem with data in local_subscriber_ids dictionary, not updating: %s',e)
+    else:
+        local_subscriber_ids = _local_subscriber_ids
+        if subscriber_ids:
+            logger.info('(ALIAS) ID ALIAS MAPPER: local_subscriber_ids dictionary is available')
+    try:        
+        _server_ids = mk_server_dict(_config['ALIASES']['PATH'], _config['ALIASES']['SERVER_ID_FILE'])
+    except Exception as e:
+        logger.info('(ALIAS) ID ALIAS MAPPER: problem with data in server_ids dictionary, not updating: %s',e)
+    else:
+        server_ids = _server_ids
     if server_ids:
         logger.info('(ALIAS) ID ALIAS MAPPER: server_ids dictionary is available')