解决
修改Nginx的配置将add_header Content-length 0；删除，处理 Content-Type为application/octet-stream
一、请求报文
二、异常信息
对应前端页面的异常信息为：
Network Error
epoll_wait() reported that client prematurely closed connection, so upstream connection is closed to
三、解决方案
需要将nginx的配置文件nginx.conf的发起请求对应端口下的location对应路径的add_header Content-length 0；删除
