=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 302 Found
Location: https://www.google.com/alerts?hl=en
Cache-Control: private
Content-Type: text/html; charset=UTF-8
X-Content-Type-Options: nosniff
Date: Mon, 29 Jul 2019 01:07:00 GMT
Server: google_alerts
Content-Length: 232
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
Connection: close

HTTP/1.1 200 OK
X-Frame-Options: DENY
Content-Type: text/html; charset=UTF-8
Date: Mon, 29 Jul 2019 01:07:00 GMT
Pragma: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Cache-Control: no-cache, must-revalidate
X-Content-Type-Options: nosniff
Server: google_alerts
X-XSS-Protection: 0
Alt-Svc: quic=&quot;:443&quot;; ma=2592000; v=&quot;46,43,39&quot;
Accept-Ranges: none
Vary: Accept-Encoding
Connection: close

Request headers
================
HEAD /alerts?hl=en 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.google.com
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.