Dinamycally validate OAS apigee

[Edsasto]

Hi, I want to validate the proxy request against a dynamycally generated openapi spec (preferably generated at runtime), this is because I want to enforce the required fields based on the application consuming my API.

Looking at the OASValidation policy documentation https://cloud.google.com/apigee/docs/api-platform/reference/policies/oas-validation-policy#oasresour... now I can use a flow variable in order to specify the URL of the resourceFile that I want to validate against. I don't want to create a resourceFile and deploy a new revision everytime I want to add an possible case. It is possible to make this validation against a json object stored in a flow variable? so I can generate the openapi JSON file dynamycally, or there is possible to create a resourcefile at runtime?

The closest workaround I saw is using a library to manually make the validation https://stackoverflow.com/questions/24613278/how-do-i-do-json-schema-validation-using-apigee-edge-po... (note: I'm using apigee x) but I would like to use the OASValidation policy instead. Thank you in advance 

[apickelsimer]

I haven't tried this, but one idea is to store the OAS resource file at the environment level. This means you still have to maintain the resource files separately, but you would not have to create a new revision each time you need another OAS resource.

[Edsasto]

Hi, thank you for your answer, I'll try it but I would like to avoid creating a resource file for each case.