1 files changed, 49 insertions, 0 deletions
diff --git a/deps/undici/src/lib/cache/util.js b/deps/undici/src/lib/cache/util.js
new file mode 100644
index 0000000000..44d52b789e
--- /dev/null
+++ b/deps/undici/src/lib/cache/util.js
@@ -0,0 +1,49 @@
+'use strict'
+
+const assert = require('assert')
+const { URLSerializer } = require('../fetch/dataURL')
+const { isValidHeaderName } = require('../fetch/util')
+
+/**
+ * @see https://url.spec.whatwg.org/#concept-url-equals
+ * @param {URL} A
+ * @param {URL} B
+ * @param {boolean | undefined} excludeFragment
+ * @returns {boolean}
+ */
+function urlEquals (A, B, excludeFragment = false) {
+  const serializedA = URLSerializer(A, excludeFragment)
+
+  const serializedB = URLSerializer(B, excludeFragment)
+
+  return serializedA === serializedB
+}
+
+/**
+ * @see https://github.com/chromium/chromium/blob/694d20d134cb553d8d89e5500b9148012b1ba299/content/browser/cache_storage/cache_storage_cache.cc#L260-L262
+ * @param {string} header
+ */
+function fieldValues (header) {
+  assert(header !== null)
+
+  const values = []
+
+  for (let value of header.split(',')) {
+    value = value.trim()
+
+    if (!value.length) {
+      continue
+    } else if (!isValidHeaderName(value)) {
+      continue
+    }
+
+    values.push(value)
+  }
+
+  return values
+}
+
+module.exports = {
+  urlEquals,
+  fieldValues
+}