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const Buffer = require('buffer').Buffer;
const {
ArrayPrototypeForEach,
Error,
EvalError,
FunctionPrototypeCall,
ObjectAssign,
ObjectCreate,
ObjectDefineProperty,
ObjectGetOwnPropertyDescriptor,
ObjectGetOwnPropertyNames,
ObjectGetPrototypeOf,
ObjectKeys,
ObjectPrototypeToString,
RangeError,
ReferenceError,
SafeSet,
SymbolToStringTag,
SyntaxError,
TypeError,
URIError,
} = primordials;
const kSerializedError = 0;
const kSerializedObject = 1;
const kInspectedError = 2;
const errors = {
Error, TypeError, RangeError, URIError, SyntaxError, ReferenceError, EvalError
};
const errorConstructorNames = new SafeSet(ObjectKeys(errors));
function TryGetAllProperties(object, target = object) {
const all = ObjectCreate(null);
if (object === null)
return all;
ObjectAssign(all,
TryGetAllProperties(ObjectGetPrototypeOf(object), target));
const keys = ObjectGetOwnPropertyNames(object);
ArrayPrototypeForEach(keys, (key) => {
let descriptor;
try {
descriptor = ObjectGetOwnPropertyDescriptor(object, key);
} catch { return; }
const getter = descriptor.get;
if (getter && key !== '__proto__') {
try {
descriptor.value = FunctionPrototypeCall(getter, target);
} catch {
// Continue regardless of error.
}
}
if ('value' in descriptor && typeof descriptor.value !== 'function') {
delete descriptor.get;
delete descriptor.set;
all[key] = descriptor;
}
});
return all;
}
function GetConstructors(object) {
const constructors = [];
for (let current = object;
current !== null;
current = ObjectGetPrototypeOf(current)) {
const desc = ObjectGetOwnPropertyDescriptor(current, 'constructor');
if (desc && desc.value) {
ObjectDefineProperty(constructors, constructors.length, {
__proto__: null,
value: desc.value, enumerable: true
});
}
}
return constructors;
}
function GetName(object) {
const desc = ObjectGetOwnPropertyDescriptor(object, 'name');
return desc && desc.value;
}
let internalUtilInspect;
function inspect(...args) {
if (!internalUtilInspect) {
internalUtilInspect = require('internal/util/inspect');
}
return internalUtilInspect.inspect(...args);
}
let serialize;
function serializeError(error) {
if (!serialize) serialize = require('v8').serialize;
try {
if (typeof error === 'object' &&
ObjectPrototypeToString(error) === '[object Error]') {
const constructors = GetConstructors(error);
for (let i = 0; i < constructors.length; i++) {
const name = GetName(constructors[i]);
if (errorConstructorNames.has(name)) {
const serialized = serialize({
constructor: name,
properties: TryGetAllProperties(error)
});
return Buffer.concat([Buffer.from([kSerializedError]), serialized]);
}
}
}
} catch {
// Continue regardless of error.
}
try {
const serialized = serialize(error);
return Buffer.concat([Buffer.from([kSerializedObject]), serialized]);
} catch {
// Continue regardless of error.
}
return Buffer.concat([Buffer.from([kInspectedError]),
Buffer.from(inspect(error), 'utf8')]);
}
let deserialize;
function deserializeError(error) {
if (!deserialize) deserialize = require('v8').deserialize;
switch (error[0]) {
case kSerializedError: {
const { constructor, properties } = deserialize(error.subarray(1));
const ctor = errors[constructor];
ObjectDefineProperty(properties, SymbolToStringTag, {
__proto__: null,
value: { value: 'Error', configurable: true },
enumerable: true
});
return ObjectCreate(ctor.prototype, properties);
}
case kSerializedObject:
return deserialize(error.subarray(1));
case kInspectedError: {
const buf = Buffer.from(error.buffer,
error.byteOffset + 1,
error.byteLength - 1);
return buf.toString('utf8');
}
}
require('assert').fail('This should not happen');
}
module.exports = { serializeError, deserializeError };
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