Spring Cloud Feign调用返回流/html

记一次 Spring Cloud Feign接口返回流的过程
网关项目由于过滤器的存在不能让接口直接暴露在公网，目前需要进行迂回战术，在可以公网无鉴权的项目里进行Feign调用，由此跳过鉴权，但是发现返回的是一个txt/html，之前一只返回的是数据类型，第一次使用Feign返回此类型

内部暴露

@ApiOperation("获取自助机取件码")
@GetMapping("/selfServiceMachine/getQRCode/{caseId}")
  public void getQRCode(HttpServletResponse response,@PathVariable Long caseId) {
      try {
          SelfServiceMachine obj = selfServiceMachineService.findByCaseId(caseId);
          response.setContentType("text/html");
          response.getWriter().write("" +
                  "" +
                  "" +
                  "" +
                  "");
      } catch (Exception ex) {
          log.error(ex.getMessage());
      }
  }

FeignClient

 /**
 * @author Hope
 * @date 2020/7/21 14:43
 * @return Response
 * @description: 获取自助机取件码
 */
 @GetMapping(path = "/selfServiceMachine/getQRCode/{caseId}" ,consumes = MediaType.APPLICATION_JSON_UTF8_VALUE)
 Response getQRCode( @PathVariable(value = "caseId")Long caseId);

外部暴露

/**
 * @author Hope
 * @date 2020/7/21 14:43
 * @return Response
 * @description: 获取自助机取件码-无鉴权
 */
 @GetMapping("/selfServiceMachine/getQRCode/{caseId}")
    public void getQRCode(HttpServletResponse servletResponse, @PathVariable(value = "caseId") Long caseId) {
        Response response = iCaseFeignClient.getQRCode(caseId);
        Response.Body body = response.body();
        InputStream fileInputStream = null;
        OutputStream outStream;
        try {
            fileInputStream = body.asInputStream();
            outStream = servletResponse.getOutputStream();
            byte[] bytes = new byte[1024];
            int len = 0;
            while ((len = fileInputStream.read(bytes)) != -1) {
                outStream.write(bytes, 0, len);
            }
            fileInputStream.close();
            outStream.close();
            outStream.flush();
        } catch (Exception e) {
            log.error(e.getMessage());
        }
    }