1 files changed, 29 insertions, 0 deletions
diff --git a/ext/node/polyfills/_http_common.ts b/ext/node/polyfills/_http_common.ts
new file mode 100644
index 000000000..616fbb65d
--- /dev/null
+++ b/ext/node/polyfills/_http_common.ts
@@ -0,0 +1,29 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+
+const tokenRegExp = /^[\^_`a-zA-Z\-0-9!#$%&'*+.|~]+$/;
+/**
+ * Verifies that the given val is a valid HTTP token
+ * per the rules defined in RFC 7230
+ * See https://tools.ietf.org/html/rfc7230#section-3.2.6
+ */
+function checkIsHttpToken(val: string) {
+  return tokenRegExp.test(val);
+}
+
+const headerCharRegex = /[^\t\x20-\x7e\x80-\xff]/;
+/**
+ * True if val contains an invalid field-vchar
+ *  field-value    = *( field-content / obs-fold )
+ *  field-content  = field-vchar [ 1*( SP / HTAB ) field-vchar ]
+ *  field-vchar    = VCHAR / obs-text
+ */
+function checkInvalidHeaderChar(val: string) {
+  return headerCharRegex.test(val);
+}
+
+export const chunkExpression = /(?:^|\W)chunked(?:$|\W)/i;
+export {
+  checkInvalidHeaderChar as _checkInvalidHeaderChar,
+  checkIsHttpToken as _checkIsHttpToken,
+};