=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Content-Type: text/html; charset=iso-8859-1
Date: Sat, 27 Nov 2021 23:19:43 GMT
Location: https://flickriver.com/photos/tags/%e3%83%a9%e3%83%bc%e3%83%a1%e3%83%b3/interesting/
Server: Apache
Connection: Close

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Date: Sat, 27 Nov 2021 23:19:43 GMT
Server: Apache
Set-Cookie: stoken=35a34613a2da1bf7b9596c48fe9c4b44; path=/; domain=.flickriver.com; HttpOnly
Connection: Close

Request headers
================
HEAD /photos/tags/%e3%83%a9%e3%83%bc%e3%83%a1%e3%83%b3/interesting/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: flickriver.com
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.