Error Handling

porter error handling is similar to flask. When an exception goes unhandled while processing an HTTP request, if the exception has the attribute code then porter will use this value as the status code for the HTTP response.

porter is designed to cover exception handling for 99% of use cases. However, there are legitimate reasons users may need to implement custom exception handling. For example, suppose you want to use porter to expose documentation for a model REST API before the model is ready to start serving requests. In this case, you might want to deploy a model whose endpoint returns 503. This can be accomplished as follows

from porter.exceptions import PorterException
from porter.services import PredictionService

class StubService(PredictionService):
    def serve(self):
        raise PorterException('Model not yet available', code=503)