http: move utcDate to internal/http.js

PR-URL: https://github.com/nodejs/node/pull/14239
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/internal/http.js b/lib/internal/http.js
index 0b12bc7c8fb..71e32498f35 100644..100755
--- a/lib/internal/http.js
+++ b/lib/internal/http.js
@@ -1,5 +1,21 @@
 'use strict';
 
+const timers = require('timers');
+
+var dateCache;
+function utcDate() {
+  if (!dateCache) {
+    const d = new Date();
+    dateCache = d.toUTCString();
+    timers.enroll(utcDate, 1000 - d.getMilliseconds());
+    timers._unrefActive(utcDate);
+  }
+  return dateCache;
+}
+utcDate._onTimeout = function() {
+  dateCache = undefined;
+};
+
 function ondrain() {
   if (this._httpMessage) this._httpMessage.emit('drain');
 }
@@ -7,4 +23,5 @@ function ondrain() {
 module.exports = {
   outHeadersKey: Symbol('outHeadersKey'),
   ondrain,
+  utcDate
 };