From fb6c4cdfb4a70967ea51f4bb4a74c690b070b8a4 Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Tue, 14 Dec 2021 17:29:50 -0500
Subject: [PATCH] Fixed problem with is_socket_alive

---
 httplib.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/httplib.h b/httplib.h
index 583531b..dc328fc 100644
--- a/httplib.h
+++ b/httplib.h
@@ -2338,9 +2338,11 @@ inline bool wait_until_socket_is_ready(socket_t sock, time_t sec, time_t usec) {
 }
 
 inline bool is_socket_alive(socket_t sock) {
+  if (detail::select_read(sock, 0, 0) == 0) {
+    return true;
+  }
   char buf[1];
-  return detail::select_read(sock, 0, 0) &&
-         recv(sock, &buf[0], sizeof(buf), MSG_PEEK) != 0;
+  return recv(sock, &buf[0], sizeof(buf), MSG_PEEK) > 0;
 }
 
 class SocketStream : public Stream {