The Tor Browser: dom/indexedDB/test/blob_worker_crash_iframe.html@7e26c7da4463 (annotated)

dom/indexedDB/test/blob_worker_crash_iframe.html@7e26c7da4463 (annotated)

dom/indexedDB/test/blob_worker_crash_iframe.html

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 <!--
   Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/
 -->
 <html>
 <head>
   <title>Indexed Database Test</title>
   <script type="text/javascript">
   function report(result) {
     var message = { source: "iframe" };
     message.result = result;
     window.parent.postMessage(message, "*");
   }
   function runIndexedDBTest() {
     var db = null;
     // Create the data-store
     function createDatastore() {
       try {
         var request = indexedDB.open(window.location.pathname, 1);
         request.onupgradeneeded = function(event) {
           event.target.result.createObjectStore("foo");
         }
         request.onsuccess = function(event) {
           db = event.target.result;
           createAndStoreBlob();
         }
       }
       catch (e) {
 dump("EXCEPTION IN CREATION: " + e + "\n " + e.stack + "\n");
         report(false);
       }
     }
     function createAndStoreBlob() {
       const BLOB_DATA = ["fun ", "times ", "all ", "around!"];
       var blob = new Blob(BLOB_DATA, { type: "text/plain" });
       var objectStore = db.transaction("foo", "readwrite").objectStore("foo");
       objectStore.add({ blob: blob }, 42).onsuccess = refetchBlob;
     }
     function refetchBlob() {
       var foo = db.transaction("foo").objectStore("foo");
       foo.get(42).onsuccess = fetchedBlobCreateWorkerAndSendBlob;
     }
     function fetchedBlobCreateWorkerAndSendBlob(event) {
       var idbBlob = event.target.result.blob;
       var compositeBlob = new Blob(['I like the following blob: ', idbBlob],
                                    { type: "text/fancy" });
       function workerScript() {
         onmessage = function(event) {
           // Save the Blob to the worker's global scope.
           self.holdOntoBlob = event.data;
           // Send any message so we can serialize and keep our runtime behaviour
           // consistent.
           postMessage('kung fu death grip established');
         }
       }
       var url =
         URL.createObjectURL(new Blob(["(", workerScript.toSource(), ")()"]));
       // Keep a reference to the worker on the window.
       var worker = window.worker = new Worker(url);
       worker.postMessage(compositeBlob);
       worker.onmessage = workerLatchedBlobDeleteFromDB;
     }
     function workerLatchedBlobDeleteFromDB() {
       // Delete the reference to the Blob from the database leaving the worker
       // thread reference as the only live reference once a GC has cleaned
       // out our references that we sent to the worker.  The page that owns
       // us triggers a GC just for that reason.
       var objectStore = db.transaction("foo", "readwrite").objectStore("foo");
       objectStore.delete(42).onsuccess = closeDBTellOwningThread;
     }
     function closeDBTellOwningThread(event) {
       // Now that worker has latched the blob, clean up the database.
       db.close();
       db = null;
       report('ready');
     }
     createDatastore();
   }
   </script>
 </head>
 <body onload="runIndexedDBTest();">
 </body>
 </html>

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dom/indexedDB/test/blob_worker_crash_iframe.html@7e26c7da4463 (annotated)

dom/indexedDB/test/blob_worker_crash_iframe.html