如何使用Nginx生成HTTP请求的动态内容？

location /api {
  set_by_lua_block $name {
    if ngx.var.arg_name == 'xiaomi' then
      return 'Hello, xiaomi!'
    elseif ngx.var.arg_name == 'xiaoli' then
      return 'Hello, xiaoli!'
    else
      return 'Hello, xiaohua!'
    end
  }
 
  return 200 $name;
}