zuul路由过滤代码示例

package com.roncoo.shop.zuul.filter;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;

@Component
public class UserLoginFilter extends ZuulFilter{

	 private static Logger logger = LoggerFactory.getLogger(UserLoginFilter.class);
		
		// pre，routing，post，error
	    @Override
	    public String filterType() {
	        return "pre";
	    }

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

		// 根据逻辑判断是否要过滤
	    public boolean shouldFilter() {
	        return true;
	    }

	    public Object run() {
	        RequestContext ctx = RequestContext.getCurrentContext();
	        HttpServletRequest request = ctx.getRequest();
	        logger.info(String.format("%s >>> %s", request.getMethod(), request.getRequestURL().toString()));
			
	        Object userId = request.getParameter("userId");
			
	        if(userId == null) {
	        	logger.warn("userId is empty,not allow to access website");
	            ctx.setSendZuulResponse(false);
	            ctx.setResponseStatusCode(401);
	            try {
	                ctx.getResponse().getWriter().write("userId is empty,not allow to access website");
	            }catch (Exception e){}

	            return null;
	        }			
	        logger.info("userId is ok,allow to access website");
			
	        return null;
	    }
	
	
	

}