zuul不仅只是路由,还可以自定义过滤器来实现服务验证。
实现案例:自定义过滤器,检验头部是否带有token,如果token=wangx,则通过校验,若不存在或不为wangx则返回提示token错误。
扩展:一般情况下,可以采用JWT规范来做token的校验。
JWT:https://jwt.io/
1. 自定义过滤器
package com.wangx.cloud.springcloud04zuul.filter; import com.netflix.zuul.ZuulFilter; import com.netflix.zuul.context.RequestContext; import com.netflix.zuul.exception.ZuulException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; public class MyFilter extends ZuulFilter { @Override public String filterType() { return "pre"; } @Override public int filterOrder() { return 1; } @Override public boolean shouldFilter() { return true; } @Override public Object run() throws ZuulException { //获取requestContext实例 RequestContext requestContext = RequestContext.getCurrentContext(); //获取到request对象 HttpServletRequest request = requestContext.getRequest(); //获取response对象 HttpServletResponse response = requestContext.getResponse(); // 判断token是否为wangx, 1 继续往下执行,否则打印token error if (!"wangx".equals(request.getHeader("token"))) { try { //输出流中写入错误信息 PrintWriter printWriter = response.getWriter(); printWriter.write("token is error"); printWriter.flush(); printWriter.close(); } catch (IOException e) { e.printStackTrace(); } } System.out.println("请求路径为:---" + request.getRequestURI()); return null; } }
2. 注册自定义的过滤器
@Bean public MyFilter myFilter() { return new MyFilter(); }
3. 测试
使用postman访问:http://localhost:9876/spring-cloud-consumer/user/1
来源:https://www.cnblogs.com/Eternally-dream/p/9870294.html