请教问题： gin框架 返回二进制文件流时，响应该如何设置？

返回文件下载流，当文件小于等于1k的时候，是正常响应的。 当大于1k的文件时，无报错，但是没有下载文件的响应。

返回代码为：
c.Header("Content-Type", "application/octet-stream") c.Header("Content-Disposition", attachment; filename= + fileName) c.Header("Content-Transfer-Encoding", "binary")

c.Data(200,"application/octet-stream",r)

无报错，响应头为： access-control-allow-credentials: true access-control-allow-headers: Origin, X-Requested-With, Content-Type, Accept, Authorization access-control-allow-methods: POST, GET, OPTIONS, PUT, DELETE, UPDATE access-control-allow-origin: * access-control-expose-headers: Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Cache-Control, Content-Language, Content-Type content-disposition: attachment; filename= content-type: application/octet-stream date: Mon, 19 Oct 2020 01:43:39 GMT transfer-encoding: chunked