test_reload_large_postdata.html

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<!DOCTYPE HTML>

<html>

<head>

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

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

</head>

<body>

<p id="display"></p>

<form id="form" action="file_reload_large_postdata.sjs" target="_blank" rel="opener" method="POST">

  <input id="input" name="payload" type="hidden" value=""/>

</form>

<pre id="test">

<script>

// This is derived from `kTooLargeStream` in `IPCStreamUtils.cpp`.

const kTooLargeStream = 1024 * 1024;

function waitForPopup(expected) {

  return new Promise(resolve => {

    addEventListener("message", evt => {

      info("got message!");

      is(evt.source.opener, window, "the event source's opener should be this window");

      is(evt.data, expected, "got the expected data from the popup");

      resolve(evt.source);

    }, { once: true });

});

add_task(async function() {

  await SpecialPowers.pushPrefEnv({"set": [["dom.confirm_repost.testing.always_accept", true]]});

  let form = document.getElementById("form");

  let input = document.getElementById("input");

  // Create a very large value to include in the post payload. This should

  // ensure that the value isn't sent directly over IPC, and is instead sent as

  // an async inputstream.

  let payloadSize = kTooLargeStream;

  let popupReady = waitForPopup(payloadSize);

  input.value = "A".repeat(payloadSize);

  form.submit();

  let popup = await popupReady;

  try {

    let popupReady2 = waitForPopup(payloadSize);

    info("reloading popup");

    popup.location.reload();

    let popup2 = await popupReady2;

    is(popup, popup2);

  } finally {

    popup.close();

});

// The .sjs server can time out processing the 1mb payload in debug builds.

SimpleTest.requestLongerTimeout(2);

</script>

</pre>

</body>

</html>