Zuul modification request header, response header (Sike)

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Foreword

Since SpingSecurity + SpringSession integration scenario involves modifying Zuul request header problem.

Therefore, comb a more comprehensive Zuul modify the request headers, response head of the article .

1 SpingSecurity + SpringSession integrate Scene II

This scenario is a scenario microcells + Unified Gateway : Gateway SpingSecurity achieve authentication token, into the sessionID after transfection, micro monomer routed to the service, SpringSession monomers micro Session sharing service implementation. SessionID held in the token.

2 Features:

Zuul gateway SpingSecurity implement token authentication token extracted from sessionID, placed header head, then pass the background microService

Reference 3: Zuul filter using modification request and response headers header

A: Modify the request parameters, see Bowen

RequestContext ctx = RequestContext.getCurrentContext();
HttpServletRequest request = ctx.getRequest();
     Map<String, List<String>> requestQueryParams = ctx.getRequestQueryParams();

        if (requestQueryParams==null) {
            requestQueryParams=new HashMap<>();
        }

        //将要新增的参数添加进去,被调用的微服务可以直接 去取,就想普通的一样,框架会直接注入进去
        ArrayList<String> arrayList = new ArrayList<>();
        arrayList.add("1");
        requestQueryParams.put("test", arrayList);

        ctx.setRequestQueryParams(requestQueryParams);

Two: Modify the request header, see Bowen

RequestContext ctx = RequestContext.getCurrentContext();  
ctx.addZuulRequestHeader("original_requestURL",request.getRequestURL().toString());

Three: to modify the response header, see Bowen

RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletResponse response = ctx.getResponse();
        String info = response.getHeader("info");
        String info_size = response.getHeader("info_size");
        /**
         * 设置响应头，使请求变为文件下载
         */
        ctx.addZuulResponseHeader("Content-Type", "application/octet-stream");
        ctx.addZuulResponseHeader("Content-Disposition", "attachment;fileName=" + info);
        ctx.addZuulResponseHeader("Content-Length", ""+info_size);

4 ZuulFilter modification request header

One pair of header request containing the token intercepts

2 springsecurity responsible sessionid attribute on the request of the

Head 3 filter is responsible for requesting modification request header, the session is added to the micro and services in

package com.crazymaker.springcloud.cloud.center.zuul.config;

import com.crazymaker.springcloud.common.constants.SessionConstants;
import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class ModifyRequestHeaderFilter extends ZuulFilter {

    @Override
    public boolean shouldFilter() {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        String uri = request.getRequestURI();
        /**
         * 根据条件去判断是否需要路由，是否需要执行该过滤器
         */
        String token = request.getHeader(SessionConstants.AUTHORIZATION);
        log.info("token=" + token);
        if (!StringUtils.isEmpty(token) ) {
            return true;
        }
        return false;
    }

    /**
     * 修改请求头
     *
     * @return
     * @throws ZuulException
     */
    @Override
    public Object run() throws ZuulException {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();

        String sessionSeed = (String) request.getAttribute(SessionConstants.SESSION_SEED);
        log.info("sessionSeed=" + sessionSeed);

        ctx.addZuulRequestHeader(SessionConstants.SESSION_SEED,sessionSeed);

//        response.addHeader(SessionConstants.SESSION_SEED, sessionId);
        return null;

    }

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

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

}

5 token到 sessionid

Springsecurity responsible for the authentication token, sessionid then extracted from the token, and placed in attribute request.

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