mirror of
https://github.com/warmbly/warmbly.git
synced 2026-08-19 16:01:16 +00:00
Matthew Meszaros
28 lines
1.0 KiB
Go
28 lines
1.0 KiB
Go
package jobs
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import "strings"
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// isMachineOpen reports whether an open event came from an automated fetcher
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// rather than a human-rendered view. The edge already filters crawlers and
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// security scanners outright; this classifies the gray zone we still WANT to
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// count (it is real delivery signal) but must not present as a human open:
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//
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// - Apple Mail Privacy Protection prefetches every pixel at delivery time
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// with a WebKit UA that ends at the engine token. A real Safari/Mail
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// render continues with "Version/... Safari/...", so the bare suffix is
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// the canonical MPP fingerprint.
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// - A missing UA is never a real mail client or browser.
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//
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// Gmail's image proxy is deliberately treated as HUMAN: it fetches at open
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// time (not delivery), and it is the only open signal Gmail exposes.
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func isMachineOpen(userAgent *string) bool {
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if userAgent == nil {
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return true
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}
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ua := strings.ToLower(strings.TrimSpace(*userAgent))
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if ua == "" {
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return true
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}
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return strings.HasSuffix(ua, "(khtml, like gecko)")
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}
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