=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Date: Mon, 29 Jul 2019 00:37:52 GMT
X-Li-Pop: prod-edc2
X-LI-Proto: http/1.1
Location: https://www.slideshare.net/slideshow/embed_code/4991265

HTTP/1.1 200 OK
Server: nginx
Date: Mon, 29 Jul 2019 00:37:52 GMT
Content-Type: text/html; charset=utf-8
Status: 200 OK
X-Request-UUID: 3RTOVc5IIOw1a5fwlDY+pw==
X-Content-Type-Options: nosniff
X-FRUC-Version: FRUC
X-ss-make-cacheable: true
X-Bench-ID: s4991265/a26283555
X-Bench-Route: slideshow/embed_code
X-XSS-Protection: 1; mode=block
X-UA-Compatible: IE=Edge,chrome=1
ETag: &quot;787a3fbc6e29d50c46002e08ab55454b&quot;
Cache-Control: max-age=0, private, must-revalidate
X-Request-Id: 88b142dcc4d79e0b058ef4fd1d9aecad
X-Runtime: 0.146913
P3P: CP=&quot;OTI DSP COR CUR ADM DEV PSD IVD CONo OUR IND&quot;
X-Content-Type-Options: nosniff
X-Li-Fabric: prod-lva1
Set-Cookie: language=**; path=/; secure
Set-Cookie: SERVERID=sldsng1|XT4/4|XT4/4; path=/
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X-Li-Pop: prod-edc2
X-LI-Proto: http/1.1
X-LI-UUID: YcavRb65tRWgbuPAkysAAA==

Request headers
================
HEAD /slideshow/embed_code/4991265 HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Host: www.slideshare.net
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.