From 9c0fb7a98a100b016e9752df0d24eddf3c6bea69 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=97=D0=B0=20=D0=9B=D1=83=D0=BF=D0=BE=D0=B9?=
 <130570371+zalupoi@users.noreply.github.com>
Date: Wed, 12 Apr 2023 17:31:27 +0000
Subject: [PATCH] Fix RFC 7230 violation See
 https://github.com/nodejs/node/issues/47528 for more details See
 https://github.com/me-no-dev/ESPAsyncWebServer/pull/1301 for original PR from
 @zalupoi

---
 src/WebResponses.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/WebResponses.cpp b/src/WebResponses.cpp
index e3fbfd1..1fb6188 100644
--- a/src/WebResponses.cpp
+++ b/src/WebResponses.cpp
@@ -492,9 +492,7 @@ size_t AsyncAbstractResponse::_ack(AsyncWebServerRequest* request, size_t len, u
         free(buf);
         return 0;
       }
-      outLen = sprintf_P((char*)buf + headLen, PSTR("%x"), readLen) + headLen;
-      while (outLen < headLen + 4)
-        buf[outLen++] = ' ';
+      outLen = sprintf((char*)buf+headLen, "%04x", readLen) + headLen;
       buf[outLen++] = '\r';
       buf[outLen++] = '\n';
       outLen += readLen;