# PrepareCurl `PrepareCurl(Client, Request, Curl)` `Client`-`{WebClient}` `Request`-`{WebRequest}` `Curl`-`{String}` 在发送之前更新cURL命令的钩子， 用于设置内部cURL选项([cURL Docs](http://curl.haxx.se/docs/manpage.html))