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Test Info:

<meta charset="utf-8">
<title>Bug 1720103 - Https-first: Do not upgrade form submissions (for now)</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<iframe style="width:100%;" id="testframe"></iframe>
<script class="testbody" type="text/javascript">
* Description of the test:
* We test https-first behaviour with forms.
* We perform each test with once with same origin and the second time
* with a cross origin. We perform two GET form requests and two POST
* form requests.
* In more detail:
* 1. Test: Request that gets upgraded to https, GET form submission.
* 2. Test: Request that gets upgraded to https, that upgraded request
* gets timed out, so https-first send an http request, GET form submission.
* 3. Test: request that gets upgraded to https, and sends a POST form
* 4. Test: Request where the https upgrade get timed out -> http, and sends a POST form
window.addEventListener("message", receiveMessage);
const CROSS_ORIGIN = SAME_ORIGIN.replace(".com", ".org");
const Tests = [{
// 1. Test GET, gets upgraded
query: "?test=1",
scheme: "https:",
method: "GET",
value: "test=success",
// 2. Test GET, initial request will be downgraded
scheme: "http:",
method: "GET",
value: "test=success"
{ // 3. Test POST formular, gets upgraded
query: "?test=3",
scheme: "http:",
method: "POST",
value: "test=success"
{ // 4. Test POST formular, request will be downgraded
query: "?test=4",
scheme: "http:",
method: "POST",
value: "test=success"
let currentTest;
let counter = 0;
let testWin;
let sameOrigin = true;
// Verify that top-level request got the expected scheme and reached the correct location.
async function receiveMessage(event){
let data =;
let origin = sameOrigin? SAME_ORIGIN : CROSS_ORIGIN
const expectedLocation = origin.replace("http:", currentTest.scheme);
// If GET request check that form was transfered by url
if (currentTest.method === "GET") {
is(data.location, expectedLocation + currentTest.query,
"Reached the correct location for " + currentTest.query );
} else {
// Since the form is always send to we expect it here as location
is(data.location.includes(SAME_ORIGIN.replace("http:", currentTest.scheme)), true,
"Reached the correct location for " + currentTest.query );
is(data.scheme, currentTest.scheme,`${currentTest.query} upgraded or downgraded to ` + currentTest.scheme);
// Check that the form value is correct
is(data.form, currentTest.value, "Form was transfered");
// Flip origin flag
sameOrigin ^= true;
// Only go to next test if already sent same and cross origin request for current test
if (sameOrigin) {
// Check if we have test left, if not finish the testing
if (counter >= Tests.length) {
window.removeEventListener("message", receiveMessage);
// If we didn't reached the end yet, run next test
function runTest() {
currentTest = Tests[counter];
// If sameOrigin flag is set make a origin request, else a cross origin request
if (sameOrigin) {
testWin= + currentTest.query, "_blank");
} else {
testWin= + currentTest.query, "_blank");
// Set prefs and start test
SpecialPowers.pushPrefEnv({ set: [
["", true],
["security.warn_submit_secure_to_insecure", false]
]}, runTest);