Is there any way to modify the response content after JWT authentication fails?

[bluven]

目前go-zero自带的jwt校验失败后，返回的响应体是空的，我翻遍了官方文档，没看到定制响应体内容的方法，又看了一下源码，发现是可以调用callback的：

go-zero/rest/engine.go

Line 70 in 271f105

func (ng *engine) appendAuthHandler(fr featuredRoutes, chn chain.Chain,

func (ng *engine) appendAuthHandler(fr featuredRoutes, chn chain.Chain,
	verifier func(chain.Chain) chain.Chain) chain.Chain {
	if fr.jwt.enabled {
		if len(fr.jwt.prevSecret) == 0 {
			chn = chn.Append(handler.Authorize(fr.jwt.secret,
				handler.WithUnauthorizedCallback(ng.unauthorizedCallback)))
		} else {
			chn = chn.Append(handler.Authorize(fr.jwt.secret,
				handler.WithPrevSecret(fr.jwt.prevSecret),
				handler.WithUnauthorizedCallback(ng.unauthorizedCallback)))
		}
	}

	return verifier(chn)

go-zero/rest/server.go

Line 313 in 271f105

// WithUnauthorizedCallback returns a RunOption that with given unauthorized callback set.

// WithUnauthorizedCallback returns a RunOption that with given unauthorized callback set.
func WithUnauthorizedCallback(callback handler.UnauthorizedCallback) RunOption {
	return func(svr *Server) {
		svr.ngin.setUnauthorizedCallback(callback)
	}
}

但是配置UnauthorizedCallback的位置应该是在生成的routes.go文件里，这个文件应该不能修改。

所以，我想问问，怎么做才能生成定制的响应体？

[mmfiRan]

set custom callbacks in your main function