codthing

Very good idea library, but there is no minimum startup demo, and there are errors and omissions in the documentation code, and no dependencies are added to the sample code....

Hope to support chain proxy[FR]

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### Feature description There are many times when you need to circumvent the firewall first and then switch proxies freely, so you hope to provide a chain proxy

链式代理 ｜ 游戏提示:对不起,您必须与您玩游戏相同的IP地址进行安全检查

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## 描述问题 我用链式代理，vpn服务 -> 代理ip服务 预期行为： 可在浏览器中正常切换ip畅玩游戏 实际行为：  ## 如何复现 如上步骤 ## 日志