[leo_gateway] Content-Range Header is not set in Range Request Reply

[windkit]

For a Range Request, Content-Range Header is not set in the reply.

The http request is :

Accept:*/*
Accept-Encoding:identity;q=1, *;q=0
Accept-Language:en,zh-CN;q=0.8,zh;q=0.6
Connection:keep-alive
Host:localhost:8080
Range:bytes=0-
Referer:http://localhost:8080/1.mp4
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

tocmat:

Accept-Ranges:bytes
Content-Length:10419330
Content-Range:bytes 0-10419329/10419330
Content-Type:video/mp4
Date:Wed, 15 Nov 2017 07:29:37 GMT
Last-Modified:Wed, 15 Nov 2017 07:15:14 GMT

leofs:

Connection:keep-alive
Content-Length:10419330
Content-Type:video/mp4
Date:Wed, 15 Nov 2017 07:23:38 GMT
Last-Modified:Fri, 10 Nov 2017 07:10:01 GMT
Server:LeoFS

Reference

https://tools.ietf.org/html/rfc7233#section-4.2