relay_reuse.go RawHistoryFolder

1package url
2
3import (
4	"strings"
5	"time"
6)
7
8// RelayReuseWindow is how long a pane opened for an externally relayed URL
9// remains eligible to be reused when the same URL is relayed again.
10const RelayReuseWindow = 2 * time.Minute
11
12// RelayURLKey returns the canonical key identifying a relayed URL for reuse
13// decisions.
14func RelayURLKey(raw string) string {
15	return Normalize(strings.TrimSpace(raw))
16}
17
18// ShouldReuseRelayPane reports whether a pane that was opened for recordedURL
19// at openedAt should be reused for requestedURL at now, instead of creating a
20// new pane. It is true only when both URLs are non-empty and identical after
21// normalization and the pane is no older than window. A pane recorded in the
22// future (clock anomaly) or with a non-positive window is never reused.
23func ShouldReuseRelayPane(recordedURL string, openedAt time.Time, requestedURL string, now time.Time, window time.Duration) bool {
24	if window <= 0 {
25		return false
26	}
27	requested := RelayURLKey(requestedURL)
28	if requested == "" || requested != RelayURLKey(recordedURL) {
29		return false
30	}
31	age := now.Sub(openedAt)
32	return age >= 0 && age <= window
33}