=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: AkamaiGHost
Content-Length: 0
Location: https://whitehouse.gov/
Date: Mon, 29 Jul 2019 00:38:51 GMT
Connection: close
Referer: https://ssdp.org
Content-Type: text/html; charset=utf-8

HTTP/1.1 301 Moved Permanently
Server: AkamaiGHost
Content-Length: 0
Location: https://www.whitehouse.gov/
Date: Mon, 29 Jul 2019 00:38:52 GMT
Connection: close
Strict-Transport-Security: max-age=31536000 ; includeSubDomains ; preload
Referer: https://ssdp.org
Content-Type: text/html; charset=utf-8

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Accept-Ranges: bytes
Content-Length: 57037
Date: Mon, 29 Jul 2019 00:38:52 GMT
Connection: close
Strict-Transport-Security: max-age=31536000 ; includeSubDomains ; preload
X-Frame-Options: SAMEORIGIN

Request headers
================
HEAD / 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.whitehouse.gov
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.