set_body_internal

# File lib/net/http/generic_request.rb, line 109
  def set_body_internal(str)   #:nodoc: internal use only
    raise ArgumentError, "both of body argument and HTTPRequest#body set" if str and (@body or @body_stream)
    self.body = str if str
    if @body.nil? && @body_stream.nil? && @body_data.nil? && request_body_permitted?
      self.body = ''
    end
  end