From 75f0e52e34c2620d486ccb696862b23e473d9ac8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=BCrg=C3=BCn=20Day=C4=B1o=C4=9Flu?=
 <gurgun.dayioglu@icloud.com>
Date: Thu, 24 Aug 2023 14:54:37 +0300
Subject: [PATCH] forward to dicer for validation

---
 lib/types/multipart.js | 45 +++++-------------------------------------
 1 file changed, 5 insertions(+), 40 deletions(-)

diff --git a/lib/types/multipart.js b/lib/types/multipart.js
index e5de06d..0f3e4e6 100644
--- a/lib/types/multipart.js
+++ b/lib/types/multipart.js
@@ -22,7 +22,6 @@ const RE_FIELD = /^form-data$/i
 const RE_CHARSET = /^charset$/i
 const RE_FILENAME = /^filename$/i
 const RE_NAME = /^name$/i
-const DASH = 0x2d /* - */
 
 Multipart.detect = /^multipart\/form-data/i
 function Multipart (boy, cfg) {
@@ -48,10 +47,7 @@ function Multipart (boy, cfg) {
   function checkFinished () {
     if (nends === 0 && finished && !boy._done) {
       finished = false
-      process.nextTick(function () {
-        boy._done = true
-        boy.emit('finish')
-      })
+      self.end()
     }
   }
 
@@ -72,8 +68,6 @@ function Multipart (boy, cfg) {
   let curField
   let finished = false
 
-  this._boundary = boundary
-  this._boundaryNotFound = true
   this._needDrain = false
   this._pause = false
   this._cb = undefined
@@ -265,18 +259,12 @@ function Multipart (boy, cfg) {
   }).on('error', function (err) {
     boy.emit('error', err)
   }).on('finish', function () {
-    if (self._nparts === 0 && self._boundaryNotFound) {
-      boy.emit('error', new Error('Unexpected end of multipart data'))
-    }
     finished = true
     checkFinished()
   })
 }
 
 Multipart.prototype.write = function (chunk, cb) {
-  if (this._boundaryNotFound && (this._nparts !== 0 || this._checkBoundary(chunk))) {
-    this._boundaryNotFound = false
-  }
   const r = this.parser.write(chunk)
   if (r && !this._pause) {
     cb()
@@ -288,38 +276,15 @@ Multipart.prototype.write = function (chunk, cb) {
 
 Multipart.prototype.end = function () {
   const self = this
-  if (self._nparts === 0 && self._boundaryNotFound) {
-    self._boy.emit('error', new Error('Unexpected end of multipart data'))
-  }
-  if (self._nparts === 0 && !self._boy._done) {
+
+  if (self.parser.writable) {
+    self.parser.end()
+  } else if (!self._boy._done) {
     process.nextTick(function () {
       self._boy._done = true
       self._boy.emit('finish')
     })
-  } else if (self.parser.writable) { self.parser.end() }
-}
-
-Multipart.prototype._checkBoundary = function (chunk) {
-  const boundaryLen = this._boundary.length
-
-  if (chunk.length < (boundaryLen + 4)) { return false }
-
-  if (
-    chunk[0] !== DASH /* - */ ||
-    chunk[1] !== DASH /* - */ ||
-    chunk[2 + boundaryLen] !== DASH /* - */ ||
-    chunk[2 + boundaryLen + 1] !== DASH /* - */
-  ) {
-    return false
-  }
-
-  const val = Buffer.from(this._boundary)
-
-  for (let i = 0; i < boundaryLen; ++i) {
-    if (chunk[2 + i] !== val[i]) { return false }
   }
-
-  return true
 }
 
 function skipPart (part) {