fix(android): opening the vault no longer calls the server every time

Asked plainly by the user: why does open trigger a sync? Because OpenLocalNow displays the cache and then refreshes in the background, so a change made on the desktop shows up without anyone thinking about it. Sound intent, applied on EVERY open - including a lock followed by a re-open three seconds later, which cannot learn anything new. Measured cost of one such pointless refresh: 1 s of download and 5.5 s of key derivation. A minimum interval between two background refreshes fixes that, whatever else is wrong: the desktop does not publish several times a minute, and looking at most once a quarter of an hour is enough for a change to arrive unnoticed. Pressing Sync goes through another path and never waits. The sha comparison that should already have made an unchanged refresh cheap is still not firing - two fingerprints print identically yet compare unequal. It is now compared with SameText on trimmed values, which cannot confuse two distinct snapshots since a hex digest never differs by case or whitespace alone, and the log reports both lengths so the invisible character shows up on the next real refresh. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-17 16:15:07 +01:00
parent f97e44768a
commit 65f5659d06
2 changed files with 43 additions and 2 deletions
@@ -207,7 +207,15 @@ begin
            // Meme sha : le contenu est celui qu'on detient deja. On rend la
            // meme reponse qu'un 304 pour que l'appelant epargne la derivation,
            // et on jette le conteneur - il ne servirait a rien.
-            else if (AKnownETag <> '') and (Result.ETag = AKnownETag) then
+            //
+            // COMPARAISON INSENSIBLE A LA CASSE ET AUX BLANCS. Une empreinte
+            // hexadecimale ne peut pas differer seulement par la casse ou par
+            // un espace : trancher ainsi ne peut donc pas confondre deux
+            // instantanes distincts, alors qu'une egalite stricte se laisse
+            // battre par un caractere invisible - un guillemet d'en-tete, une
+            // fin de ligne - et fait payer une derivation complete pour rien.
+            else if (AKnownETag <> '') and
+                    SameText(Result.ETag.Trim, AKnownETag.Trim) then
            begin
              Result.Status := ssNotModified;
              Result.Container := '';