读取zuul返回的body内容

package com.focus.zuul.config;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.netflix.ribbon.RibbonHttpResponse;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StreamUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;

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

/**

• 本想用来做下游服务统一的异常处理，后发现springboot 如果出异常默认进入error接口，到不了zuul，需继承ErrorController或单独异常拦截。

• SendErrorFilter zuul的异常过滤器 处理的是过滤器周期中的异常，下游服务出现异常似乎不会进入zuul的error过滤器。

• 而且zuul过滤环节抛出的异常最后都被处理成了ZuulException，比如获取不到服务、响应超时等等最后都会抛出ZuulException
  */
  //@Configuration
  public class FocusErrorFilter extends ZuulFilter {

  @Value("${zuul.errorControllerUrl}")
  private String errorController;

  @Override
  public String filterType() {
  //
  return ERROR_TYPE;
  // return POST_TYPE;
  }

  @Override
  public int filterOrder() {
  return 1001;
  }

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

  @Override
  public Object run() throws ZuulException {
  RequestContext context = RequestContext.getCurrentContext();
  Throwable throwable = context.getThrowable();

   HttpServletRequest request = context.getRequest();
  
   String responseBody = context.getResponseBody();
   HttpServletResponse response = context.getResponse();
   context.getResponseStatusCode();
   InputStream responseDataStream = context.getResponseDataStream();
  

// try {
// String s = StreamUtils.copyToString(responseDataStream, Charset.forName("UTF-8"));
// } catch (IOException e) {
// e.printStackTrace();
// }

    //读取响应中的内容
    try {
        Object zuulResponse = RequestContext.getCurrentContext().get("zuulResponse");
        if (zuulResponse != null) {
            RibbonHttpResponse resp = (RibbonHttpResponse) zuulResponse;
            String body = StreamUtils.copyToString(resp.getBody(), Charset.forName("UTF-8"));
            System.err.println(body);
            resp.close();
            RequestContext.getCurrentContext().setResponseBody(body);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

// RequestDispatcher requestDispatcher = request.getRequestDispatcher("error");
// try {
// requestDispatcher.forward(request,context.getResponse());
// } catch (ServletException e) {
// e.printStackTrace();
// } catch (IOException e) {
// e.printStackTrace();
// }
return null;
}
}