def post(body, path=nil)
      if header["Content-Type"] =~ /application\/(\w+[+])?json/
         chunk_save(path, "POST", body, param, header)
      else
        execute(
          request(path, :post, body, param, header)
        )
      end
    end
def post(body, path=nil)
      if header["Content-Type"] =~ /application\/(\w+[+])?json/
         chunk_save(path, "POST", body, param, header)
      else
        execute(
          request(path, :post, body, param, header)
        )
      end
    end
POST
 @param [Array, Hash, String] body