2 files changed, 9 insertions, 0 deletions
diff --git a/lib/webrick/server.rb b/lib/webrick/server.rb
index 46575734c1..5e57966255 100644
--- a/lib/webrick/server.rb
+++ b/lib/webrick/server.rb
@@ -146,6 +146,7 @@ module WEBrick
       begin
         sock = svr.accept
         sock.sync = true
+        Utils::set_non_blocking(sock) 
         Utils::set_close_on_exec(sock)
       rescue Errno::ECONNRESET, Errno::ECONNABORTED, Errno::EPROTO => ex
         # TCP connection was established but RST segment was sent
diff --git a/lib/webrick/utils.rb b/lib/webrick/utils.rb
index 7283704c1d..cf9da6f2ce 100644
--- a/lib/webrick/utils.rb
+++ b/lib/webrick/utils.rb
@@ -18,6 +18,14 @@ end
 
 module WEBrick
   module Utils
+    def set_non_blocking(io)
+      flag = File::NONBLOCK
+      if defined?(Fcntl::F_GETFL)
+        flag |= io.fcntl(Fcntl::F_GETFL)
+      end
+      io.fcntl(Fcntl::F_SETFL, flag)
+    end
+    module_function :set_non_blocking
 
     def set_close_on_exec(io)
       if defined?(Fcntl::FD_CLOEXEC)