1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
| 'use strict';
|
| // We define these manually to ensure they're always copied
| // even if they would move up the prototype chain
| // https://nodejs.org/api/http.html#http_class_http_incomingmessage
| const knownProps = [
| 'destroy',
| 'setTimeout',
| 'socket',
| 'headers',
| 'trailers',
| 'rawHeaders',
| 'statusCode',
| 'httpVersion',
| 'httpVersionMinor',
| 'httpVersionMajor',
| 'rawTrailers',
| 'statusMessage'
| ];
|
| module.exports = (fromStream, toStream) => {
| const fromProps = new Set(Object.keys(fromStream).concat(knownProps));
|
| for (const prop of fromProps) {
| // Don't overwrite existing properties
| if (prop in toStream) {
| continue;
| }
|
| toStream[prop] = typeof fromStream[prop] === 'function' ? fromStream[prop].bind(fromStream) : fromStream[prop];
| }
| };
|
|
