ZuulFilter 执行顺序

说明： 创建了两个Filter，分别是

PreFilter

public class PreFilter extends ZuulFilter {
    public PreFilter() {
        super();
    }

    @Override
    public String filterType() {
        return FilterConstants.PRE_TYPE;
    }

    @Override
    public int filterOrder() {
        return 0;
    }

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

//跨域设置
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        //只过滤OPTIONS 请求
        if(request.getMethod().equals(RequestMethod.OPTIONS.name())){

            return true;
        }
        return false;
    }

    @Override
    public Object run() {

        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        HttpServletResponse response = ctx.getResponse();

        response.setHeader("Access-Control-Allow-Origin",request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Credentials","true");
        response.setHeader("Access-Control-Allow-Headers","authorization, content-type");
        response.setHeader("Access-Control-Allow-Methods","POST,GET");

        String requestUrl = request.getRequestURL().toString();
        String requestUri = request.getRequestURI();
        String zuul = requestUrl.substring(0,requestUrl.indexOf(requestUri)); // zuul根路径
        ctx.addZuulRequestHeader("zuul", zuul);
        //不再路由
        ctx.setSendZuulResponse(false);
        ctx.setResponseStatusCode(200);

        return null;
    }

}

PostFilter

@Component
public class PostFilter extends ZuulFilter {
    protected static final String SEND_ERROR_FILTER_RAN = "sendErrorFilter.ran";

    @Override
    public String filterType() {
        return FilterConstants.POST_TYPE;
    }

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

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

    @Override
    public Object run() {

        return null;
    }
}

我测试了几种情况，发现结果如下

1  按照filterType决定顺序

Pre 优先 Post执行，此时filterOrder没有作用。

2 filterType相同

filterOrder有作用，数字越小，越先执行。（负数也是这个规则，0和-1的话，-1先执行）

3 相同filterType,相同filterOrder，都执行，执行顺序不清楚。

prefilter先执行了，post后执行了。

感觉不像是按照过滤请名称排序的样子。