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Viewing file:     NoSchemaIntrospectionCustomRule.js (1.16 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.NoSchemaIntrospectionCustomRule = NoSchemaIntrospectionCustomRule;

var _GraphQLError = require("../../../error/GraphQLError.js");

var _definition = require("../../../type/definition.js");

var _introspection = require("../../../type/introspection.js");

/**
 * 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.
 */
function NoSchemaIntrospectionCustomRule(context) {
  return {
    Field: function Field(node) {
      var type = (0, _definition.getNamedType)(context.getType());

      if (type && (0, _introspection.isIntrospectionType)(type)) {
        context.reportError(new _GraphQLError.GraphQLError("GraphQL introspection has been disabled, but the requested query contained the field \"".concat(node.name.value, "\"."), node));
      }
    }
  };
}