connect

# File lib/net/http.rb, line 868
    def connect
      if proxy? then
        conn_address = proxy_address
        conn_port    = proxy_port
      else
        conn_address = address
        conn_port    = port
      end

      D "opening connection to #{conn_address}:#{conn_port}..."
      s = Timeout.timeout(@open_timeout, Net::OpenTimeout) {
        TCPSocket.open(conn_address, conn_port, @local_host, @local_port)
      }
      s.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
      D "opened"
      if use_ssl?
        ssl_parameters = Hash.new
        iv_list = instance_variables
        SSL_IVNAMES.each_with_index do |ivname, i|
          if iv_list.include?(ivname) and
            value = instance_variable_get(ivname)
            ssl_parameters[SSL_ATTRIBUTES[i]] = value if value
          end
        end
        @ssl_context = OpenSSL::SSL::SSLContext.new
        @ssl_context.set_params(ssl_parameters)
        D "starting SSL for #{conn_address}:#{conn_port}..."
        s = OpenSSL::SSL::SSLSocket.new(s, @ssl_context)
        s.sync_close = true
        D "SSL established"
      end
      @socket = BufferedIO.new(s)
      @socket.read_timeout = @read_timeout
      @socket.continue_timeout = @continue_timeout
      @socket.debug_output = @debug_output
      if use_ssl?
        begin
          if proxy?
            buf = "CONNECT #{@address}:#{@port} HTTP/#{HTTPVersion}\r\n"
            buf << "Host: #{@address}:#{@port}\r\n"
            if proxy_user
              credential = ["#{proxy_user}:#{proxy_pass}"].pack('m')
              credential.delete!("\r\n")
              buf << "Proxy-Authorization: Basic #{credential}\r\n"
            end
            buf << "\r\n"
            @socket.write(buf)
            HTTPResponse.read_new(@socket).value
          end
          # Server Name Indication (SNI) RFC 3546
          s.hostname = @address if s.respond_to? :hostname=
          if @ssl_session and
             Time.now < @ssl_session.time + @ssl_session.timeout
            s.session = @ssl_session if @ssl_session
          end
          Timeout.timeout(@open_timeout, Net::OpenTimeout) { s.connect }
          if @ssl_context.verify_mode != OpenSSL::SSL::VERIFY_NONE
            s.post_connection_check(@address)
          end
          @ssl_session = s.session
        rescue => exception
          D "Conn close because of connect error #{exception}"
          @socket.close if @socket and not @socket.closed?
          raise exception
        end
      end
      on_connect
    end