new: add detetion for undescribed request parameters

[Alexey19]

Added the ability, when checking a request, to find parameters that are not described in the schema.

[fenollp]

does openapi allow unspecified query params?

[Alexey19]

does openapi allow unspecified query params?

I think yes, but I'm not sure. But this functionality added for user, who has, for example, a lot of request/response and want to ensure, what specification consists full information about all parameters (later I want to add same check for request and response body).

[Alexey19]

@fenollp , what about pull-request?

[fenollp]

Hi! This is interesting. Are you still looking to merge this?

I'm thinking that the OpenAPIv3 spec does not treat query params a certain way. Schemas do allow "undescribed query params" in that a schema for a parameter of type "query" may sport the setting additionalProperties: true.

If you want a route not to accept query fields that are not listed in the spec, use additionalProperties: false:

# ...
- name: MyQueryParam
  in: query
  schema:                                    # only allows "?myOnlyProperty=42"
    type: object
    additionalProperties: false
    properties:
      myOnlyProperty:
        type: number
# ...

[fenollp]

@Alexey19 Feel free to re-open if needed.