So behebst du die Warnung „Specify a Cache Validator”
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nginx - CloudFlare - Multiple requests to origin server during the max-age period - Stack Overflow
ETag header is stripped by CloudFlare, causing "The contact you were trying to edit has changed" to show after every edit · Issue #1157 · nextcloud/contacts · GitHub
Possible bug? Getting etag from example.com using fetch() is not possible - Workers - Cloudflare Community
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Wie implementiere ich Sicherheits-HTTP-Header, um Sicherheitslücken zu vermeiden?
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Introducing Smart Edge Revalidation
ETag header is stripped by CloudFlare, causing "The contact you were trying to edit has changed" to show after every edit · Issue #1157 · nextcloud/contacts · GitHub
Etag could not be disabled - Performance - Cloudflare Community
ETag header is stripped by CloudFlare, causing "The contact you were trying to edit has changed" to show after every edit · Issue #1157 · nextcloud/contacts · GitHub