test_ipcBlob_fileReaderSync.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test IPCBlob and FileReaderSync</title>

  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<script type="text/javascript">

function workerScript() {

  // Available to workers.

  /* global FileReaderSync */

  onmessage = function(event) {

    let readerMemoryBlob = new FileReaderSync();

    let status = readerMemoryBlob.readAsText(new Blob(['hello world'])) == 'hello world';

    postMessage({ status, message: "FileReaderSync with memory blob still works" });

    let readerIPCBlob1 = new FileReaderSync();

    postMessage({ blob: event.data, method: 'readAsText',

                  data: readerIPCBlob1.readAsText(event.data)});

    let readerIPCBlob2 = new FileReaderSync();

    postMessage({ blob: event.data, method: 'readAsArrayBuffer',

                  data: readerIPCBlob2.readAsArrayBuffer(event.data)});

    let readerIPCBlob3 = new FileReaderSync();

    postMessage({ blob: event.data, method: 'readAsDataURL',

                  data: readerIPCBlob3.readAsDataURL(event.data)});

    let multipartBlob = new Blob(['wow', event.data]);

    let readerIPCBlobMultipart1 = new FileReaderSync();

    postMessage({ blob: multipartBlob, method: 'readAsText',

                  data: readerIPCBlobMultipart1.readAsText(multipartBlob)});

    let readerIPCBlobMultipart2 = new FileReaderSync();

    postMessage({ blob: multipartBlob, method: 'readAsArrayBuffer',

                  data: readerIPCBlobMultipart2.readAsArrayBuffer(multipartBlob)});

    let readerIPCBlobMultipart3 = new FileReaderSync();

    postMessage({ blob: multipartBlob, method: 'readAsDataURL',

                  data: readerIPCBlobMultipart3.readAsDataURL(multipartBlob)});

    postMessage({ finish: true });

let completed = false;

let pendingTasks = 0;

function maybeFinish() {

  if (completed && !pendingTasks) {

    SimpleTest.finish();

let workerUrl = URL.createObjectURL(new Blob(["(", workerScript.toString(), ")()"]));

let worker = new Worker(workerUrl);

worker.onmessage = event => {

  if ("status" in event.data) {

    ok(event.data.status, event.data.message);

    return;

  if ("blob" in event.data) {

    let fr = new FileReader();

    fr[event.data.method](event.data.blob);

    ++pendingTasks;

    fr.onload = () => {

      if (event.data.method != 'readAsArrayBuffer') {

        is(event.data.data, fr.result, "The file has been read");

      } else {

        is(event.data.data.byteLength, fr.result.byteLength, "The file has been read");

      --pendingTasks;

      maybeFinish();

    return;

  if ("finish" in event.data) {

    completed = true;

    maybeFinish();

};

let url = SimpleTest.getTestFileURL("script_file.js");

let script = SpecialPowers.loadChromeScript(url);

script.addMessageListener("file.opened", message => {

  worker.postMessage(message.file);

});

script.sendAsyncMessage("file.open");

SimpleTest.waitForExplicitFinish();

</script>

</pre>

</body>

</html>