37 lines
1 KiB
HTML
37 lines
1 KiB
HTML
<!doctype html>
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<meta charset="utf8">
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<title>Performs IndexedDB tasks in response to postMessage</title>
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<script>
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'use strict';
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self.addEventListener('message', async event => {
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const action = event.data.action;
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let response = null;
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switch(action) {
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case 'get-database-names': {
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const dbInfos = await self.indexedDB.databases();
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response = dbInfos.map(dbInfo => dbInfo.name);
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break;
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}
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case 'delete-database': {
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const dbName = event.data.name;
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await new Promise((resolve, reject) => {
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const request = indexedDB.deleteDatabase(dbName);
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request.onsuccess = resolve;
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request.onerror = reject;
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});
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response = true;
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break;
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}
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}
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event.source.postMessage({ action, response }, event.origin);
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window.close();
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});
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// Make up for the fact that the opener of a cross-origin window has no way of
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// knowing when the window finishes loading.
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if (window.opener !== null) {
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window.opener.postMessage({ action: null, response: 'ready' }, '*');
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}
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</script>
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