From f4b02dfdc199a3a704ca66f2debf1347f81e5547 Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Sat, 25 Mar 2023 21:13:07 -0400
Subject: [PATCH] Fix #1533

---
 httplib.h | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/httplib.h b/httplib.h
index c12a5a2..2fdf609 100644
--- a/httplib.h
+++ b/httplib.h
@@ -6826,11 +6826,14 @@ inline bool ClientImpl::process_request(Stream &strm, Request &req,
 
 #ifdef CPPHTTPLIB_OPENSSL_SUPPORT
   if (is_ssl()) {
-    char buf[1];
-    if (SSL_peek(socket_.ssl, buf, 1) == 0 &&
-        SSL_get_error(socket_.ssl, 0) == SSL_ERROR_ZERO_RETURN) {
-      error = Error::SSLPeerCouldBeClosed_;
-      return false;
+    auto is_proxy_enabled = !proxy_host_.empty() && proxy_port_ != -1;
+    if (!is_proxy_enabled) {
+      char buf[1];
+      if (SSL_peek(socket_.ssl, buf, 1) == 0 &&
+          SSL_get_error(socket_.ssl, 0) == SSL_ERROR_ZERO_RETURN) {
+        error = Error::SSLPeerCouldBeClosed_;
+        return false;
+      }
     }
   }
 #endif