flow like the river

BACK_BACK/node_modules/undici/lib/web/eventsource/util.js

@@ -0,0 +1,37 @@
+'use strict'
+
+/**
+ * Checks if the given value is a valid LastEventId.
+ * @param {string} value
+ * @returns {boolean}
+ */
+function isValidLastEventId (value) {
+  // LastEventId should not contain U+0000 NULL
+  return value.indexOf('\u0000') === -1
+}
+
+/**
+ * Checks if the given value is a base 10 digit.
+ * @param {string} value
+ * @returns {boolean}
+ */
+function isASCIINumber (value) {
+  if (value.length === 0) return false
+  for (let i = 0; i < value.length; i++) {
+    if (value.charCodeAt(i) < 0x30 || value.charCodeAt(i) > 0x39) return false
+  }
+  return true
+}
+
+// https://github.com/nodejs/undici/issues/2664
+function delay (ms) {
+  return new Promise((resolve) => {
+    setTimeout(resolve, ms).unref()
+  })
+}
+
+module.exports = {
+  isValidLastEventId,
+  isASCIINumber,
+  delay
+}