ErrorMiddleware 捕获到在http处理时的错误 在 handler 和其他地方如果产生了 error 可直接panic，到这里统一处理，简化 if err != nil 之类的代码 panic("text") => {msg: "text", code: 0, data: {}} panic(gin.H{"code": 0, "msg": "some error"}) => {与传入的数据一致，} code 默认999999，status 默认 400，msg 默认 unknow error panic(errors.New("some error")) => {msg: "some error", code: 999999, data: {}} panic(Struct{...}) => {msg: "unknow", code: 999999, data: {...struct 数据}}.

Ginzap returns a gin.HandlerFunc (middleware) that logs requests using uber-go/zap.

RecoveryWithZap returns a gin.HandlerFunc (middleware) that recovers from any panics and logs requests using uber-go/zap.