1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/indexedDB/test/blob_worker_crash_iframe.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,98 @@
1.4 +<!--
1.5 + Any copyright is dedicated to the Public Domain.
1.6 + http://creativecommons.org/publicdomain/zero/1.0/
1.7 +-->
1.8 +<html>
1.9 +<head>
1.10 + <title>Indexed Database Test</title>
1.11 +
1.12 + <script type="text/javascript">
1.13 + function report(result) {
1.14 + var message = { source: "iframe" };
1.15 + message.result = result;
1.16 + window.parent.postMessage(message, "*");
1.17 + }
1.18 +
1.19 + function runIndexedDBTest() {
1.20 + var db = null;
1.21 +
1.22 + // Create the data-store
1.23 + function createDatastore() {
1.24 + try {
1.25 + var request = indexedDB.open(window.location.pathname, 1);
1.26 + request.onupgradeneeded = function(event) {
1.27 + event.target.result.createObjectStore("foo");
1.28 + }
1.29 + request.onsuccess = function(event) {
1.30 + db = event.target.result;
1.31 + createAndStoreBlob();
1.32 + }
1.33 + }
1.34 + catch (e) {
1.35 +dump("EXCEPTION IN CREATION: " + e + "\n " + e.stack + "\n");
1.36 + report(false);
1.37 + }
1.38 + }
1.39 +
1.40 + function createAndStoreBlob() {
1.41 + const BLOB_DATA = ["fun ", "times ", "all ", "around!"];
1.42 + var blob = new Blob(BLOB_DATA, { type: "text/plain" });
1.43 + var objectStore = db.transaction("foo", "readwrite").objectStore("foo");
1.44 + objectStore.add({ blob: blob }, 42).onsuccess = refetchBlob;
1.45 + }
1.46 +
1.47 + function refetchBlob() {
1.48 + var foo = db.transaction("foo").objectStore("foo");
1.49 + foo.get(42).onsuccess = fetchedBlobCreateWorkerAndSendBlob;
1.50 + }
1.51 +
1.52 + function fetchedBlobCreateWorkerAndSendBlob(event) {
1.53 + var idbBlob = event.target.result.blob;
1.54 + var compositeBlob = new Blob(['I like the following blob: ', idbBlob],
1.55 + { type: "text/fancy" });
1.56 +
1.57 + function workerScript() {
1.58 + onmessage = function(event) {
1.59 + // Save the Blob to the worker's global scope.
1.60 + self.holdOntoBlob = event.data;
1.61 + // Send any message so we can serialize and keep our runtime behaviour
1.62 + // consistent.
1.63 + postMessage('kung fu death grip established');
1.64 + }
1.65 + }
1.66 +
1.67 + var url =
1.68 + URL.createObjectURL(new Blob(["(", workerScript.toSource(), ")()"]));
1.69 +
1.70 + // Keep a reference to the worker on the window.
1.71 + var worker = window.worker = new Worker(url);
1.72 + worker.postMessage(compositeBlob);
1.73 + worker.onmessage = workerLatchedBlobDeleteFromDB;
1.74 + }
1.75 +
1.76 + function workerLatchedBlobDeleteFromDB() {
1.77 + // Delete the reference to the Blob from the database leaving the worker
1.78 + // thread reference as the only live reference once a GC has cleaned
1.79 + // out our references that we sent to the worker. The page that owns
1.80 + // us triggers a GC just for that reason.
1.81 + var objectStore = db.transaction("foo", "readwrite").objectStore("foo");
1.82 + objectStore.delete(42).onsuccess = closeDBTellOwningThread;
1.83 + }
1.84 +
1.85 + function closeDBTellOwningThread(event) {
1.86 + // Now that worker has latched the blob, clean up the database.
1.87 + db.close();
1.88 + db = null;
1.89 + report('ready');
1.90 + }
1.91 +
1.92 + createDatastore();
1.93 + }
1.94 + </script>
1.95 +
1.96 +</head>
1.97 +
1.98 +<body onload="runIndexedDBTest();">
1.99 +</body>
1.100 +
1.101 +</html>
