Cannot get flask g in trigger_event.

[cis1124]

I have a global custmom namespace for access control,

code:

class SecurityNamespace(Namespace):

    def trigger_event(self, event, *args):
        if event == "connect":
            print("custom namespace for access control")
            # get endpoint
            user=g.user #get "Working outside of application context"
            endpoint = self.namespace
            if check_access(user, endpoint):
                super().trigger_event(event, *args)
            else:
                return
        else:
            super().trigger_event(event, *args)

class WebAPI(SecurityNamespace):

    def __init__(self, namespace):
        super().__init__(namespace)

  
    def on_connect(self):
     
        print(g.user)# this will ok
        self._do_something(request)
        return True

I cannot use g in trigger_event,any method to fix this issue?

[miguelgrinberg]

The App/Request contexts are added when the on_... method is invoked, so that is correct, the trigger_event method does not have access. You can fix this easily by triggering a fake event:

class SecurityNamespace(Namespace):

    def trigger_event(self, event, *args):
        super().trigger_event('catchall', event, *args)

    def on_catchall(event, *args):
        if event == "connect":
            print("custom namespace for access control")
            # get endpoint
            user=g.user #get "Working outside of application context"
            endpoint = self.namespace
            if check_access(user, endpoint):
                super().trigger_event(event, *args)
            else:
                return
        else:
            super().trigger_event(event, *args)

[cis1124]

I rewrited my code as you suggest,but maybe because of some param order problem,it cannot work;

I change it to the below,seems work fine now.

class SecurityNamespace(Namespace):

    def trigger_event(self, event, *args):
        super().trigger_event('catchall', *args, event)

    @auth.login_required
    def on_catchall(self, *args):
        event = args[-1]
        if event == "connect":
            user = g.user 
            endpoint = self.namespace
            if check_access(user, endpoint):
                super().trigger_event(event, request.sid, *args[0:-1])
            else:
                return False
        else:
            super().trigger_event(event, request.sid, *args[0:-1])

[miguelgrinberg]

Yeah, I wrote the code from memory, I don't doubt it might have needed a bit of tuning. Great to hear this is working now. :)