=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
X-Robots-Tag: noindex, nofollow, nosnippet
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: Mon, 01 Jan 1990 00:00:00 GMT
Date: Mon, 29 Jul 2019 00:25:38 GMT
Content-Length: 140247
P3P: CP=&quot;This is not a P3P policy! See g.co/p3phelp for more info.&quot;
P3P: CP=&quot;This is not a P3P policy! See g.co/p3phelp for more info.&quot;
Content-Security-Policy: base-uri 'self';object-src 'none';script-src 'strict-dynamic' 'unsafe-eval' 'unsafe-inline' https: 'nonce-5TLeLF+va3HaajPHfpr80w';report-uri https://csp.withgoogle.com/csp/forms/prod
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: GSE
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Connection: close

Request headers
================
HEAD /forms/d/e/1FAIpQLScxof84OPXHWnbl6Zd2-qKJ3g9QnWYptNUuSyCcBDfUYDSacw/viewform?c=0&amp;w=1 HTTP/1.1
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Host: docs.google.com
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.