From f3183efe043d4baf505a13bbae3ff038d8e25bf8 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Mon, 3 Mar 2014 23:51:46 +0900
Subject: [PATCH] nghttpd: Emit protocol id error only when verbose output is
 enabled

---
 src/HttpServer.cc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/HttpServer.cc b/src/HttpServer.cc
index b5a9dc73..a4e08bb8 100644
--- a/src/HttpServer.cc
+++ b/src/HttpServer.cc
@@ -450,9 +450,11 @@ int Http2Handler::verify_npn_result()
 #endif // OPENSSL_VERSION_NUMBER < 0x10002000L
     }
   }
-  std::cerr << "Client did not advertise HTTP/2.0 protocol."
-            << " (nghttp2 expects " << NGHTTP2_PROTO_VERSION_ID << ")"
-            << std::endl;
+  if(sessions_->get_config()->verbose) {
+    std::cerr << "Client did not advertise HTTP/2.0 protocol."
+              << " (nghttp2 expects " << NGHTTP2_PROTO_VERSION_ID << ")"
+              << std::endl;
+  }
   return -1;
 }