如何在Zuul中选择基于头部的路由

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import org.springframework.stereotype.Component;

@Component
public class HeaderBasedRoutingFilter extends ZuulFilter {

    @Override
    public String filterType() {
        return "pre";
    }

    @Override
    public int filterOrder() {
        return 1;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        String headerValue = ctx.getRequest().getHeader("HeaderName");
        
        // 根据不同的头部值选择不同的路由
        if (headerValue.equals("Value1")) {
            ctx.setRouteHost("http://example.com/service1");
        } else if (headerValue.equals("Value2")) {
            ctx.setRouteHost("http://example.com/service2");
        } else {
            ctx.setRouteHost("http://example.com/default");
        }
        
        return null;
    }
}