Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 52.222.201.11 |
| Server Software | Apache/2.4.58 (Ubuntu) |
| CDN | CDN (Hit from cloudfront) |
| Compression | gzip |
|
🔒 🟡 Mixed Content (2 HTTP resources) | The page is served over HTTPS but loads 2 resource(s) over HTTP. This may be blocked in modern browsers. |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 52.222.201.11
Server Software Apache/2.4.58 (Ubuntu)
CDN CDN (Hit from cloudfront)
Compression gzip
🔒 🟡 Mixed Content (2 HTTP resources) The page is served over HTTPS but loads 2 resource(s) over HTTP. This may be blocked in modern browsers.
Performance
| DNS Lookup | 4.1 ms |
| TCP Connect | 5.2 ms |
| TLS Handshake | 7.9 ms |
| Time To First Byte (TTFB) | 18.5 ms |
| Content Download | 0.6 ms |
| Total Response Time | 19.1 ms |
DNS Lookup 4.1 ms
TCP Connect 5.2 ms
TLS Handshake 7.9 ms
Time To First Byte (TTFB) 18.5 ms
Content Download 0.6 ms
Total Response Time 19.1 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=63072000; includeSubDomains; preload |
| CSP | ✔ Configured |
| X-Frame-Options | ✔ SAMEORIGIN |
| X-Content-Type-Options | ✔ nosniff |
| Referrer Policy | strict-origin-when-cross-origin |
| Permissions Policy | ✔ Configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=63072000; includeSubDomains; preload
CSP ✔ Configured
X-Frame-Options ✔ SAMEORIGIN
X-Content-Type-Options ✔ nosniff
Referrer Policy strict-origin-when-cross-origin
Permissions Policy ✔ Configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | California Digital Library |
| Meta Description | The California Digital Library exists to support the University of California community’s pursuit of scholarship and to extend the University’s public service mission. |
| Canonical | https://cdlib.org/ |
| Robots Meta | max-image-preview:large |
Title California Digital Library
Meta Description The California Digital Library exists to support the University of California community’s pursuit of scholarship and to extend the University’s public service mission.
Canonical https://cdlib.org/
Robots Meta max-image-preview:large
Detected Technologies
| Technology | WordPress jQuery Google Analytics Cloudflare Apache PHP Matomo |
Technology WordPress jQuery Google Analytics Cloudflare Apache PHP Matomo
HTTP Headers
| Content-type
| text/html; charset=UTF-8 |
| Content-length
| 15902 |
| Date
| Tue, 18 Aug 2026 23:08:40 GMT |
| Content-encoding
| gzip |
| Set-cookie
| AWSALBCORS=GOtzxTIny+zzCtFPqoA8/HMnwHtFZRfgzV2sJy0sTJiyo2XfCAXAMhExF+XtuaGB61oh7ex7C3beOXmbdr/zVfmwK0TxoEkfx3NSeXJgGxVXBYnZzkSCGNES0pk8; Expires=Tue, 25 Aug 2026 23:08:39 GMT; Path=/; SameSite=None; Secure |
| Server
| Apache/2.4.58 (Ubuntu) |
| X-content-type-options
| nosniff |
| X-frame-options
| SAMEORIGIN |
| Strict-transport-security
| max-age=63072000; includeSubDomains; preload |
| Referrer-policy
| strict-origin-when-cross-origin |
| Cross-origin-resource-policy
| same-origin |
| Cross-origin-opener-policy
| same-origin |
| Permissions-policy
| camera=(), geolocation=(), microphone=() |
| Content-security-policy
| object-src 'none'; script-src 'nonce-E8KrNjzQ1eWimOR0lxRvu0' 'unsafe-inline' 'strict-dynamic' https: http:; base-uri 'none' |
| Link
| ; rel=shortlink |
| Vary
| Accept-Encoding |
| X-cache
| Hit from cloudfront |
| Via
| 1.1 7aef920ed20c713960127526fa3a88f4.cloudfront.net (CloudFront) |
| X-amz-cf-pop
| CDG50-P2 |
| X-amz-cf-id
| Gb8SYfg-jLaNgEk5KTpchdGPTuBsCZT0z2fwGQqKJUI8d_tt2tKW5w== |
| Age
| 115839 |
Meta Tags
| Viewport | width=device-width, initial-scale=1 |
| Description | The California Digital Library exists to support the University of California community’s pursuit of scholarship and to extend the University’s public service mission. |
| Robots | max-image-preview:large |
| Msapplication-TileImage |  |
Content-type text/html; charset=UTF-8
Content-length 15902
Date Tue, 18 Aug 2026 23:08:40 GMT
Content-encoding gzip
Set-cookie AWSALBCORS=GOtzxTIny+zzCtFPqoA8/HMnwHtFZRfgzV2sJy0sTJiyo2XfCAXAMhExF+XtuaGB61oh7ex7C3beOXmbdr/zVfmwK0TxoEkfx3NSeXJgGxVXBYnZzkSCGNES0pk8; Expires=Tue, 25 Aug 2026 23:08:39 GMT; Path=/; SameSite=None; Secure
Server Apache/2.4.58 (Ubuntu)
X-content-type-options nosniff
X-frame-options SAMEORIGIN
Strict-transport-security max-age=63072000; includeSubDomains; preload
Referrer-policy strict-origin-when-cross-origin
Cross-origin-resource-policy same-origin
Cross-origin-opener-policy same-origin
Permissions-policy camera=(), geolocation=(), microphone=()
Content-security-policy object-src 'none'; script-src 'nonce-E8KrNjzQ1eWimOR0lxRvu0' 'unsafe-inline' 'strict-dynamic' https: http:; base-uri 'none'
Link ; rel=shortlink
Vary Accept-Encoding
X-cache Hit from cloudfront
Via 1.1 7aef920ed20c713960127526fa3a88f4.cloudfront.net (CloudFront)
X-amz-cf-pop CDG50-P2
X-amz-cf-id Gb8SYfg-jLaNgEk5KTpchdGPTuBsCZT0z2fwGQqKJUI8d_tt2tKW5w==
Age 115839
