registering http1 and http2 handlers directly in the channel

lib/httpx/channel.rb

@@ -5,16 +5,12 @@ require "httpx/buffer"
 
 module HTTPX
   class Channel
+    include Registry
     require "httpx/channel/http2"
     require "httpx/channel/http1"
 
     BUFFER_SIZE = 1 << 14
 
-    PROTOCOLS = {
-      "h2"       => HTTP2,
-      "http/1.1" => HTTP1
-    }
-
     class << self
       def by(uri, options, &blk)
         io = case uri.scheme
@@ -132,7 +128,7 @@ module HTTPX
 
     def parser
       @parser || begin
-        @parser = PROTOCOLS[@io.protocol].new(@write_buffer, @options)
+        @parser = registry(@io.protocol).new(@write_buffer, @options)
         @parser.on(:response, &@on_response)
         @parser.on(:close) { throw(:close, self) }
         @parser

lib/httpx/channel/http1.rb

@@ -149,5 +149,6 @@ module HTTPX
       $stderr << (+"" << msg.call << "\n")
     end
   end
+  Channel.register "http/1.1", Channel::HTTP1
 end
 

lib/httpx/channel/http2.rb

@@ -180,4 +180,5 @@ module HTTPX
       $stderr << (+"connection (HTTP/2): " << msg.call << "\n")
     end
   end
+  Channel.register "h2", Channel::HTTP2
 end