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