Add simpler HTTP server example

examples/http_server_multishot.rb

@@ -22,9 +22,7 @@ def setup_connection(fd)
 
   parser = Http::Parser.new
   parser.on_message_complete = -> {
-    http_send_response(fd, "Hello, world!\n") do
-      @ring.prep_close(fd: fd)
-    end
+    http_send_response(fd, "Hello, world!\n")
   }
 
   http_prep_read(fd, parser)

examples/http_server_simpler.rb

@@ -0,0 +1,34 @@
+require_relative '../lib/iou'
+require 'socket'
+require 'http/parser'
+
+socket = TCPServer.open('127.0.0.1', 1234)
+puts 'Listening on port 1234... (multishot read)'
+
+@ring = IOU::Ring.new
+@buffer_group = @ring.setup_buffer_ring(count: 1024, size: 4096)
+
+@ring.prep_accept(fd: socket.fileno, multishot: true) do |c|
+  http_handle_connection(c[:result]) if c[:result] > 0
+end
+
+def http_handle_connection(fd)
+  parser = Http::Parser.new
+  parser.on_message_complete = -> { http_send_response(fd, "Hello, world!\n") }
+
+  @ring.prep_read(fd: fd, multishot: true, buffer_group: @buffer_group) do |c|
+    if c[:result] > 0
+      parser << c[:buffer]
+    else
+      puts "Connection closed on fd #{fd}"
+    end
+  end
+end
+
+def http_send_response(fd, body)
+  msg = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nConnection: keep-alive\r\nContent-Length: #{body.bytesize}\r\n\r\n#{body}"
+  @ring.prep_write(fd: fd, buffer: msg)
+end
+
+trap('SIGINT') { exit! }
+@ring.process_completions_loop