exception decorator and mail send for errors and changes to rec state checker

backend/__init__.py

@@ -3,7 +3,10 @@
 Backend base module
 """
 import logging
+from io import StringIO
 from logging.config import dictConfig
+from typing import Union
+
 import coloredlogs as coloredlogs
 import jwt
 import requests
@@ -25,7 +28,6 @@ __email__ = "it@t-kurze.de"
 # __status__ = "Production"
 __status__ = "Development"
 
-
 dictConfig({
     'version': 1,
     'formatters': {
@@ -66,7 +68,7 @@ dictConfig({
         },
     },
     'loggers': {
-        'mal': {
+        'lrc': {
             'level': Config.LOG_LEVEL,
             'handlers': ['wsgi', 'file', 'errors_file']
         }
@@ -78,18 +80,34 @@ dictConfig({
 })
 
 main_logger = logging.getLogger("lrc")
+
+# following might be dangerous, as buffer might be filled without a mechanism to empty it
+# error_log_stream = StringIO()
+# error_log_stream_handler = logging.StreamHandler(stream=error_log_stream)
+# error_log_stream_handler.setLevel(logging.ERROR)
+# main_logger.addHandler(error_log_stream_handler)
+
 coloredlogs.install(level='DEBUG', logger=main_logger)
 
 
 class LrcException(Exception):
-    def __init__(self, message: str, html_code: int = None):
-        super().__init__(message)
+    def __init__(self, message_or_exception: Union[str, Exception], html_code: int = None):
+        if isinstance(message_or_exception, str):
+            super().__init__(message_or_exception)
+            self.type = None
+        else:
+            super().__init__(str(message_or_exception))
+            self.type = type(message_or_exception)
         self.html_code = html_code
 
     def __repr__(self):
+        if self.type is None:
+            msg = "LRC Exception: \"{}\"".format(', '.join(super().args))
+        else:
+            msg = "LRC Exception: (original Exception: {}) \"{}\"".format(self.type, ', '.join(super().args))
         if self.html_code is not None:
-            return "LRC Exception: \"{}\" (HTML Code: {})".format(', '.join(super().args), self.html_code)
-        return ', '.join(super().args)
+            msg += " (HTML Code: {})".format(self.html_code)
+        return msg
 
     def __str__(self):
         return self.__repr__()