目录背景方案一方案二方案三方案四方案五总结背景 部门技术升级，HttpClient需要升级Feign调用，重构某一个资方时遇到请求需要添加上自定义签名headers，踩坑后记录了下来
I\'m trying my hardest to wrap my head around JavaScript closures. I get that by returning an inner function, it will have access to any variable defined in its i开发者_开发技巧mmediate parent.
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