server.go
func (ctx *RequestCtx) Success(contentType string, body []byte) {
	ctx.SetContentType(contentType)
	ctx.SetBody(body)
}
func (ctx *RequestCtx) Success(contentType string, body []byte) {
	ctx.SetContentType(contentType)
	ctx.SetBody(body)
}
// Success sets response Content-Type and body to the given values.