序

除了修改请求参数、设置响应header，响应body外，还有一种需求就是url重新，或者是修改url，这里简述一下怎么在zuul修改url。

转发配置

demo:
  ribbon:
    NIWSServerListClassName: com.netflix.loadbalancer.ConfigurationBasedServerList
    listOfServers: 192.168.99.100,192.168.99.101
zuul:
  routes:
    demo:
      path: /demo/**
      stripPrefix: true
      serviceId: demo

filter配置

@Component
public class UrlPathFilter extends ZuulFilter{

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

    @Override
    public int filterOrder() {
        return FilterConstants.PRE_DECORATION_FILTER_ORDER + 1;
    }

    @Override
    public boolean shouldFilter() {
        final String serviceId = (String) RequestContext.getCurrentContext().get("proxy");
        return "demo".equals(serviceId);
    }

    @Override
    public Object run() {
        RequestContext context = RequestContext.getCurrentContext();
        Object originalRequestPath = context.get(FilterConstants.REQUEST_URI_KEY);
        //http://localhost:10000/demo/list/data
        //-->/api/prefix/list/data
        String modifiedRequestPath = "/api/prefix" + originalRequestPath;
        context.put(FilterConstants.REQUEST_URI_KEY, modifiedRequestPath);
        return null;
    }
}