Add bin and edit workflow

bin/gems/eventmachine-1.2.7/lib/em/protocols/socks4.rb

@@ -0,0 +1,66 @@
+module EventMachine
+  module Protocols
+    # Basic SOCKS v4 client implementation
+    #
+    # Use as you would any regular connection:
+    #
+    # class MyConn < EM::P::Socks4
+    #   def post_init
+    #     send_data("sup")
+    #   end
+    #
+    #   def receive_data(data)
+    #     send_data("you said: #{data}")
+    #   end
+    # end
+    #
+    # EM.connect socks_host, socks_port, MyConn, host, port
+    #
+    class Socks4 < Connection
+      def initialize(host, port)
+        @host = Socket.gethostbyname(host).last
+        @port = port
+        @socks_error_code = nil
+        @buffer = ''
+        setup_methods
+      end
+
+      def setup_methods
+        class << self
+          def post_init; socks_post_init; end
+          def receive_data(*a); socks_receive_data(*a); end
+        end
+      end
+
+      def restore_methods
+        class << self
+          remove_method :post_init
+          remove_method :receive_data
+        end
+      end
+
+      def socks_post_init
+        header = [4, 1, @port, @host, 0].flatten.pack("CCnA4C")
+        send_data(header)
+      end
+
+      def socks_receive_data(data)
+        @buffer << data
+        return  if @buffer.size < 8
+
+        header_resp = @buffer.slice! 0, 8
+        _, r = header_resp.unpack("cc")
+        if r != 90
+          @socks_error_code = r
+          close_connection
+          return
+        end
+
+        restore_methods
+
+        post_init
+        receive_data(@buffer)  unless @buffer.empty?
+      end
+    end
+  end
+end