SpringCloud学习笔记-服务网关-Zuul-权限校验

package com.hx.apigeteway.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpStatus;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_DECORATION_FILTER_ORDER;
import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;

@Component
public class TokenFilter extends ZuulFilter {
    @Override
    public String filterType() {  //过滤器类型  属于前缀
        return PRE_TYPE;
    }

    @Override
    public int filterOrder() {  //过滤器顺序  数字越小越靠前
        return PRE_DECORATION_FILTER_ORDER - 1;
    }

    @Override
    public boolean shouldFilter() {  // 设置为true  代表这个过滤器是否生效
        return true;
    }

    //主要的处理逻辑的地方，我们做权限控制、日志等都是在这里。
    @Override
    public Object run() throws ZuulException {
        RequestContext requestContext=RequestContext.getCurrentContext();
        HttpServletRequest request = requestContext.getRequest();
        //这里从请求头参数获取
        //request.getHeader("token");
        //这里从请求中参数获取
        String token = request.getParameter("token");
        if(StringUtils.isEmpty(token)){
            requestContext.setSendZuulResponse(false);
            requestContext.setResponseStatusCode(HttpStatus.SC_UNAUTHORIZED);
        }
        return null;
    }
}

package com.hx.apigeteway.filter;

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

import javax.servlet.http.HttpServletResponse;

import java.util.UUID;

import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.POST_TYPE;
import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.SEND_RESPONSE_FILTER_ORDER;

@Component
public class AddResponseHeaderFilter  extends ZuulFilter {
    @Override
    public String filterType() {
        return POST_TYPE;
    }

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

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

    @Override
    public Object run() throws ZuulException {
        RequestContext requestContext=RequestContext.getCurrentContext();
        HttpServletResponse response = requestContext.getResponse();
        response.setHeader("test", UUID.randomUUID().toString());
        return null;
    }
}