=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Date: Mon, 29 Jul 2019 00:35:54 GMT
Connection: close
Cache-Control: max-age=3600
Expires: Mon, 29 Jul 2019 01:35:54 GMT
Location: https://www.projectknow.com/discover/drugs-on-campus-2014/
Server: cloudflare
CF-RAY: 4fdb03f89b0ee106-IAD

HTTP/1.1 200 OK
Date: Mon, 29 Jul 2019 00:35:54 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Set-Cookie: __cfduid=d420c0d722212f80b226ad165bd1eaa011564360554; expires=Tue, 28-Jul-20 00:35:54 GMT; path=/; domain=.projectknow.com; HttpOnly; Secure
Vary: Accept-Encoding
Link: &lt;https://www.projectknow.com/wp-json/&gt;; rel=&quot;https://api.w.org/&quot;
Link: &lt;https://www.projectknow.com/?p=1213654&gt;; rel=shortlink
X-Server-Ident: projectknow-com-02
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Expect-CT: max-age=604800, report-uri=&quot;https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct&quot;
Server: cloudflare
CF-RAY: 4fdb03f8dfcb574b-IAD

Request headers
================
HEAD /discover/drugs-on-campus-2014/ 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.projectknow.com
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.