shell bypass 403
"use strict";
var isPrototype = require("../prototype/is")
, isPlainObject = require("../plain-object/is");
var objectToString = Object.prototype.toString;
// Recognize host specific errors (e.g. DOMException)
var errorTaggedStringRe = /^\[object .*(?:Error|Exception)\]$/
, errorNameRe = /^[^\s]*(?:Error|Exception)$/;
module.exports = function (value) {
if (!value) return false;
var name;
// Sanity check (reject objects which do not expose common Error interface)
try {
name = value.name;
if (typeof name !== "string") return false;
if (typeof value.message !== "string") return false;
} catch (error) {
return false;
}
// Ensure its a native-like Error object
// (has [[ErrorData]] slot, or was created to resemble one)
// Note: It's not a 100% bulletproof check of confirming that as:
// - In ES2015+ string tag can be overriden via Symbol.toStringTag property
// - Host errors do not share native error tag. Still we rely on assumption that
// tag for each error will end either with `Error` or `Exception` string
// - In pre ES2015 era, no custom errors will share the error tag.
if (!errorTaggedStringRe.test(objectToString.call(value))) {
// Definitely not an ES2015 error instance, but could still be an error
// (created via e.g. CustomError.prototype = Object.create(Error.prototype))
try {
if (name !== value.constructor.name) return false;
} catch (error) {
return false;
}
if (!errorNameRe.test(name)) return false;
if (isPlainObject(value)) return false;
}
return !isPrototype(value);
};