[Django]-Django Framework : How to catch all occuring server errors centrally and trigger events on such errors

While writing an app, you can use the following approach:

Whenever your app raises an Exception, use custom, app-specific exceptions like this

class FooException(Exception):
    """Base class for all app specific exceptions"""
    pass

classFooPermissionException(FooException):
    """Specific class for permission related exceptions"""
    pass

Now your app can provide a custom middleware

class FooExceptionMiddleware(object):
    """App specific middleware to handle app specific errors"""

    def process_exception(self, request, e):
        """Processes exceptions"""
        if isinstance(e, FooException):

            if isinstance(e, FooPermissionException):
                # handle PermissionExceptions here...

        return None

You can read more about Django middleware here.

Edit:

I think you can use the above approach, to catch all Exceptions: Have a look at Django’s exception source code. Django’s internal exceptions are siblings of Exception. So with something like the following code, you can possibly catch all exceptions, wherever they are raised in your project:

class AllExceptionMiddleware(object):
    def process_exception(self, request, e):
        if isinstance(e, Exception):
            # do stuff
        return None