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comparison: dom/indexedDB/test/blob_worker_crash_iframe.html
dom/indexedDB/test/blob_worker_crash_iframe.html
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| 1 <!-- | |
| 2 Any copyright is dedicated to the Public Domain. | |
| 3 http://creativecommons.org/publicdomain/zero/1.0/ | |
| 4 --> | |
| 5 <html> | |
| 6 <head> | |
| 7 <title>Indexed Database Test</title> | |
| 8 | |
| 9 <script type="text/javascript"> | |
| 10 function report(result) { | |
| 11 var message = { source: "iframe" }; | |
| 12 message.result = result; | |
| 13 window.parent.postMessage(message, "*"); | |
| 14 } | |
| 15 | |
| 16 function runIndexedDBTest() { | |
| 17 var db = null; | |
| 18 | |
| 19 // Create the data-store | |
| 20 function createDatastore() { | |
| 21 try { | |
| 22 var request = indexedDB.open(window.location.pathname, 1); | |
| 23 request.onupgradeneeded = function(event) { | |
| 24 event.target.result.createObjectStore("foo"); | |
| 25 } | |
| 26 request.onsuccess = function(event) { | |
| 27 db = event.target.result; | |
| 28 createAndStoreBlob(); | |
| 29 } | |
| 30 } | |
| 31 catch (e) { | |
| 32 dump("EXCEPTION IN CREATION: " + e + "\n " + e.stack + "\n"); | |
| 33 report(false); | |
| 34 } | |
| 35 } | |
| 36 | |
| 37 function createAndStoreBlob() { | |
| 38 const BLOB_DATA = ["fun ", "times ", "all ", "around!"]; | |
| 39 var blob = new Blob(BLOB_DATA, { type: "text/plain" }); | |
| 40 var objectStore = db.transaction("foo", "readwrite").objectStore("foo"); | |
| 41 objectStore.add({ blob: blob }, 42).onsuccess = refetchBlob; | |
| 42 } | |
| 43 | |
| 44 function refetchBlob() { | |
| 45 var foo = db.transaction("foo").objectStore("foo"); | |
| 46 foo.get(42).onsuccess = fetchedBlobCreateWorkerAndSendBlob; | |
| 47 } | |
| 48 | |
| 49 function fetchedBlobCreateWorkerAndSendBlob(event) { | |
| 50 var idbBlob = event.target.result.blob; | |
| 51 var compositeBlob = new Blob(['I like the following blob: ', idbBlob], | |
| 52 { type: "text/fancy" }); | |
| 53 | |
| 54 function workerScript() { | |
| 55 onmessage = function(event) { | |
| 56 // Save the Blob to the worker's global scope. | |
| 57 self.holdOntoBlob = event.data; | |
| 58 // Send any message so we can serialize and keep our runtime behaviour | |
| 59 // consistent. | |
| 60 postMessage('kung fu death grip established'); | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 var url = | |
| 65 URL.createObjectURL(new Blob(["(", workerScript.toSource(), ")()"])); | |
| 66 | |
| 67 // Keep a reference to the worker on the window. | |
| 68 var worker = window.worker = new Worker(url); | |
| 69 worker.postMessage(compositeBlob); | |
| 70 worker.onmessage = workerLatchedBlobDeleteFromDB; | |
| 71 } | |
| 72 | |
| 73 function workerLatchedBlobDeleteFromDB() { | |
| 74 // Delete the reference to the Blob from the database leaving the worker | |
| 75 // thread reference as the only live reference once a GC has cleaned | |
| 76 // out our references that we sent to the worker. The page that owns | |
| 77 // us triggers a GC just for that reason. | |
| 78 var objectStore = db.transaction("foo", "readwrite").objectStore("foo"); | |
| 79 objectStore.delete(42).onsuccess = closeDBTellOwningThread; | |
| 80 } | |
| 81 | |
| 82 function closeDBTellOwningThread(event) { | |
| 83 // Now that worker has latched the blob, clean up the database. | |
| 84 db.close(); | |
| 85 db = null; | |
| 86 report('ready'); | |
| 87 } | |
| 88 | |
| 89 createDatastore(); | |
| 90 } | |
| 91 </script> | |
| 92 | |
| 93 </head> | |
| 94 | |
| 95 <body onload="runIndexedDBTest();"> | |
| 96 </body> | |
| 97 | |
| 98 </html> |
