graphql-ws
Version:
Coherent, zero-dependency, lazy, simple, GraphQL over WebSocket Protocol compliant server and client
54 lines (53 loc) • 1.56 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.extendedTypeof = extendedTypeof;
exports.isObject = isObject;
exports.isAsyncIterable = isAsyncIterable;
exports.isAsyncGenerator = isAsyncGenerator;
exports.areGraphQLErrors = areGraphQLErrors;
exports.limitCloseReason = limitCloseReason;
/** @private */
function extendedTypeof(val) {
if (val === null) {
return 'null';
}
if (Array.isArray(val)) {
return 'array';
}
return typeof val;
}
/** @private */
function isObject(val) {
return extendedTypeof(val) === 'object';
}
/** @private */
function isAsyncIterable(val) {
return typeof Object(val)[Symbol.asyncIterator] === 'function';
}
/** @private */
function isAsyncGenerator(val) {
return (isObject(val) &&
typeof Object(val)[Symbol.asyncIterator] === 'function' &&
typeof val.return === 'function'
// for lazy ones, we only need the return anyway
// typeof val.throw === 'function' &&
// typeof val.next === 'function'
);
}
/** @private */
function areGraphQLErrors(obj) {
return (Array.isArray(obj) &&
// must be at least one error
obj.length > 0 &&
// error has at least a message
obj.every((ob) => 'message' in ob));
}
/**
* Limits the WebSocket close event reason to not exceed a length of one frame.
* Reference: https://datatracker.ietf.org/doc/html/rfc6455#section-5.2.
*
* @private
*/
function limitCloseReason(reason, whenTooLong) {
return reason.length < 124 ? reason : whenTooLong;
}