- Better error reporting.

- Flask now uses application's logger instead of its own.
- ucloud file scanner refactored.

ucloud/common/logging.py

@@ -0,0 +1,24 @@
+import logging
+import colorama
+
+
+class NoTracebackStreamHandler(logging.StreamHandler):
+    def handle(self, record):
+        info, cache = record.exc_info, record.exc_text
+        record.exc_info, record.exc_text = None, None
+
+        if record.levelname == 'WARNING':
+            color = colorama.Fore.YELLOW
+        elif record.levelname in ['ERROR', 'EXCEPTION']:
+            color = colorama.Fore.LIGHTRED_EX
+        elif record.levelname == 'INFO':
+            color = colorama.Fore.LIGHTBLUE_EX
+        else:
+            color = colorama.Fore.WHITE
+        try:
+            print(color, end='', flush=True)
+            super().handle(record)
+        finally:
+            record.exc_info = info
+            record.exc_text = cache
+            print(colorama.Style.RESET_ALL, end='', flush=True)