From 1464536b9f8c3448fc53d07b17e9614f6925b00b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ricardo=20Iv=C3=A1n=20Vieitez=20Parra?=
 <3857362+corrideat@users.noreply.github.com>
Date: Sat, 15 Apr 2023 11:15:34 +0200
Subject: [PATCH] Update boundary regex

---
 package.json                 |  4 ++--
 src/parseMultipartMessage.ts | 10 +++++++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/package.json b/package.json
index d6ebaaf..3782817 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "@exact-realty/multipart-parser",
-	"version": "1.0.0",
-	"description": "MIME multipart parser",
+	"version": "1.0.1",
+	"description": "TypeScript streaming parser for MIME multipart messages",
 	"main": "dist/index.js",
 	"module": "./dist/index.mjs",
 	"exports": {
diff --git a/src/parseMultipartMessage.ts b/src/parseMultipartMessage.ts
index 3e9a5a6..eefe31c 100644
--- a/src/parseMultipartMessage.ts
+++ b/src/parseMultipartMessage.ts
@@ -30,11 +30,19 @@ const textEncoder = new TextEncoder();
 const newline = textEncoder.encode('\r\n');
 const LWSPchar = [0x09, 0x20];
 
+/* From RFC 2046 section 5.1.1 */
 export const boundaryRegex =
 	/^[0-9a-zA-Z'()+_,\-./:=? ]{0,69}[0-9a-zA-Z'()+_,\-./:=?]$/;
 
+/* From RFC 2045 section 5.1
+     tspecials :=  "(" / ")" / "<" / ">" / "@" /
+                   "," / ";" / ":" / "\" / <">
+                   "/" / "[" / "]" / "?" / "="
+                   ; Must be in quoted-string,
+                   ; to use within parameter values
+*/
 export const boundaryMatchRegex =
-	/;\s*boundary=(?:"([0-9a-zA-Z'()+_,\-./:=? ]{0,69}[0-9a-zA-Z'()+_,\-./:=?])"|([0-9a-zA-Z'()+_,\-./=?]{0,69}[0-9a-zA-Z'()+_,\-./=?]))/;
+	/;\s*boundary=(?:"([0-9a-zA-Z'()+_,\-./:=? ]{0,69}[0-9a-zA-Z'()+_,\-./:=?])"|([0-9a-zA-Z'+_\-.]{0,69}[0-9a-zA-Z'+_\-.]))/;
 
 export type TMultipartMessageIterator = AsyncGenerator<{
 	headers: Headers;