# 51 HTTP服务中间件

- [一般处理(handler)函数](/essential-go/common-standard-libraries/51-http-server-middleware/normal-handler-function.md)
- [中间件里计算handler函数的耗时](/essential-go/common-standard-libraries/51-http-server-middleware/middleware-calculate-time-required-for-handlerfunc-to-execute.md)
- [CORS中间件](/essential-go/common-standard-libraries/51-http-server-middleware/cors-middleware.md)
- [Auth中间件](/essential-go/common-standard-libraries/51-http-server-middleware/auth-middleware.md)
- [恢复handler以防止服务端崩溃](/essential-go/common-standard-libraries/51-http-server-middleware/recovery-handler-to-prevent-server-from-crashing.md)