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fix: sendBeacon 415 error - wrap payload in Blob with application/json
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Browse Source 
navigator.sendBeacon() with a string sends text/plain Content-Type,
causing Flask to reject with 415 Unsupported Media Type.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Maciej Pienczyn 2026-04-10 06:56:24 +02:00
parent fc1109a74d
commit 5a51142cfe
1 changed files with 3 additions and 3 deletions
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6
static/js/analytics-tracker.min.js vendored
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@ -69,12 +69,12 @@ type: 'page_time',
page_view_id: currentPageViewId,
time_seconds: timeOnPage
});
navigator.sendBeacon(TRACK_ENDPOINT, data);
navigator.sendBeacon(TRACK_ENDPOINT, new Blob([data], {type: 'application/json'}));
if (maxScrollDepth > 0) {
navigator.sendBeacon(SCROLL_ENDPOINT, JSON.stringify({
navigator.sendBeacon(SCROLL_ENDPOINT, new Blob([JSON.stringify({
page_view_id: currentPageViewId,
scroll_depth: maxScrollDepth
}));
})], {type: 'application/json'}));
}
}
function handleVisibilityChange() {