=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 302 Found
Date: Mon, 29 Nov 2021 02:15:48 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 0
Connection: close
Server: nginx
Location: /a/
X-Frame-Options: DENY
Vary: Cookie, Origin
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
X-XSS-Protection: 1; mode=block
Set-Cookie: sessionid=5xydxtyahajp38asso8ui0diy0hixwvx; expires=Mon, 30 May 2022 02:15:48 GMT; HttpOnly; Max-Age=15724800; Path=/; SameSite=None; Secure
X-Content-Type-Options: nosniff

HTTP/1.1 200 OK
Date: Mon, 29 Nov 2021 02:15:49 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 20624
Connection: close
Server: nginx
X-Frame-Options: DENY
Vary: Cookie, Origin
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff

Request headers
================
HEAD /a/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: workflowy.com
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.