From 8eaa8788b9d58c8a8f462fa89de5103d7eb492a8 Mon Sep 17 00:00:00 2001
From: Sky O <soraskymizu@gmail.com>
Date: Thu, 28 Mar 2024 19:50:36 +0000
Subject: [PATCH] Fix incorrect instantiation of MultipartParser

---
 moto/moto_proxy/utils.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/moto/moto_proxy/utils.py b/moto/moto_proxy/utils.py
index bbdb055af..bcd7fe299 100644
--- a/moto/moto_proxy/utils.py
+++ b/moto/moto_proxy/utils.py
@@ -8,8 +8,8 @@ def get_body_from_form_data(
     body: bytes, boundary: str
 ) -> Tuple[Optional[bytes], Dict[str, str]]:
     body_stream = io.BytesIO(body)
-    parser = multipart.MultipartParser(body_stream, boundary=boundary)
-
+    parser = multipart.MultipartParser(boundary=boundary)
+    parser.write(body_stream)
     data = None
     headers: Dict[str, str] = {}
     for prt in parser.parts():