func (resolver *SimpleHostResolver) TryResolve(param *ResolveParam) (endpoint string, support bool, err error) {
	if support = len(param.Domain) > 0; support {
		endpoint = param.Domain
	}
	return
}
TryResolve if the Domain exist in param, use it as endpoint
package endpoints
type SimpleHostResolver struct {
}
func (resolver *SimpleHostResolver) GetName() (name string) {
	name = "simple host resolver"
	return
}