| import { GraphQLError } from '../../../error/GraphQLError.mjs'; |
| import { getNamedType } from '../../../type/definition.mjs'; |
| import { isIntrospectionType } from '../../../type/introspection.mjs'; |
| |
| /** |
| * Prohibit introspection queries |
| * |
| * A GraphQL document is only valid if all fields selected are not fields that |
| * return an introspection type. |
| * |
| * Note: This rule is optional and is not part of the Validation section of the |
| * GraphQL Specification. This rule effectively disables introspection, which |
| * does not reflect best practices and should only be done if absolutely necessary. |
| */ |
| export function NoSchemaIntrospectionCustomRule(context) { |
| return { |
| Field(node) { |
| const type = getNamedType(context.getType()); |
| |
| if (type && isIntrospectionType(type)) { |
| context.reportError( |
| new GraphQLError( |
| `GraphQL introspection has been disabled, but the requested query contained the field "${node.name.value}".`, |
| { |
| nodes: node, |
| }, |
| ), |
| ); |
| } |
| }, |
| }; |
| } |