2 files changed, 2 insertions, 16 deletions
diff --git a/lib/plum/errors.rb b/lib/plum/errors.rb
index 5b4b565..2770b27 100644
--- a/lib/plum/errors.rb
+++ b/lib/plum/errors.rb
@@ -1,5 +1,6 @@
 module Plum
   class Error < StandardError; end
+  class LegacyHTTPError < Error; end
   class HPACKError < Error; end
   class HTTPError < Error
     ERROR_CODES = {
diff --git a/lib/plum/http_connection.rb b/lib/plum/http_connection.rb
index 4ffea73..b7ca046 100644
--- a/lib/plum/http_connection.rb
+++ b/lib/plum/http_connection.rb
@@ -35,8 +35,7 @@ module Plum
             settings != nil)
           switch_protocol(settings)
         else
-          respond_not_supported
-          close
+          raise LegacyHTTPError.new
         end
       }
 
@@ -60,20 +59,6 @@ module Plum
       io.write(resp)
     end
 
-    def respond_not_supported
-      data = "Use modern web browser with HTTP/2 support."
-
-      resp = ""
-      resp << "HTTP/1.1 505 HTTP Version Not Supported\r\n"
-      resp << "Content-Type: text/plain\r\n"
-      resp << "Content-Length: #{data.bytesize}\r\n"
-      resp << "Server: plum/#{Plum::VERSION}\r\n"
-      resp << "\r\n"
-      resp << data
-
-      io.write(resp)
-    end
-
     def process_first_request
       encoder = HPACK::Encoder.new(0, indexing: false) # don't pollute connection's HPACK context
       stream = new_stream(1)