parlov docs
Oracle ClassesExistence OracleError Message Granularity

Error Message Granularity

Existence inferred from resource-aware error messages in otherwise identical failure responses.

Implemented

Existence inferred from resource-aware error messages in otherwise identical failure responses. The server resolves the resource before validating the request, leaking existence through context-dependent error content.

GET

Query parameter constraints and resource-aware validation errors.

POST

Creation constraints and relationship conflicts.

PUT / PATCH

Schema validation and type coercion.

DELETE

State constraint violations.

Cross-Method Patterns

Oracles that exploit request-level validation across multiple HTTP methods.

HEAD — Method Context

HEAD is a retrieval-oriented method context that mirrors GET semantics except that the server must not send response content.

GET — Error Message Granularity

Focuses on query parameter constraints and resource-aware validation errors under the Error Message Granularity class.