HTTP 206 获取文件部分内容和范围请求

curl -I https://raw.githubusercontent.com/Germey/LaravelGeetest/master/README.md
HTTP/1.1 200 OK
Content-Security-Policy: default-src 'none'; style-src 'unsafe-inline'
Strict-Transport-Security: max-age=31536000
X-Content-Type-Options: nosniff
X-Frame-Options: deny
X-XSS-Protection: 1; mode=block
ETag: "b29f4639b76cd7f94a4b36b05be6c85acfe478f1"
Content-Type: text/plain; charset=utf-8
Cache-Control: max-age=300
X-Geo-Block-List:
X-GitHub-Request-Id: 850A:16D2:30128BA:3341504:59BBC946
Content-Length: 8709
Accept-Ranges: bytes
Date: Fri, 15 Sep 2017 12:36:31 GMT
Via: 1.1 varnish
Connection: keep-alive
X-Served-By: cache-nrt6123-NRT
X-Cache: HIT
X-Cache-Hits: 1
X-Timer: S1505478991.145862,VS0,VE1
Vary: Authorization,Accept-Encoding
Access-Control-Allow-Origin: *
X-Fastly-Request-ID: ee23d80d2ba507ec0a70c880a075df0d2671aa4d
Expires: Fri, 15 Sep 2017 12:41:31 GMT
Source-Age: 8

curl --header "Range: bytes=0-500" https://raw.githubusercontent.com/Germey/LaravelGeetest/master/README.md

curl --header "Range: bytes=-500" https://raw.githubusercontent.com/Germey/LaravelGeetest/master/README.md

curl --header "Range: bytes=500-1000" https://raw.githubusercontent.com/Germey/LaravelGeetest/master/README.md

curl --header "Range: bytes=500-" https://raw.githubusercontent.com/Germey/LaravelGeetest/master/README.md

Header set Accept-Ranges bytes