springboot X-Accel-Redirect 大文件下载实现

location /protected_files {
    internal;     # internal 表示这个路径只能在 Nginx 内部访问，不能用浏览器直接访问防止未授权的下载
    alias /mnt/files;
}
location /gsdss-api/ {
       #OPTIONS请求处理
       if ($request_method = 'OPTIONS') {
               add_header 'Access-Control-Max-Age' 1728000;
               add_header Access-Control-Allow-Origin *;
               add_header Access-Control-Allow-Credentials true;
               add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
               add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,token,orgcode';
               return 200;
       }
       proxy_pass 网关地址;
       proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
       client_max_body_size 100m;
       proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
}

    public void downloadByLink(HttpServletResponse response, String fileId) {
        //查询附件信息
        AttachmentResp resp = attachmentService.findByAttachId(fileId);
        //鉴权实际已经通过gateway完成
        try {
            String fileName = URLEncoder.encode(resp.getFileName(), "UTF-8");
            response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
            response.setHeader("X-Accel-Redirect", "/upload" + resp.getPath()); //设置URI给nginx进行内部的跳转
            response.setHeader("X-Accel-Limit-Rat", "202400"); //限速
        } catch (UnsupportedEncodingException e) {
            log.error("文件下载失败 ", e);
            throw new BusinessException("文件下载失败");
        }
    }