browser_speculative_connection_link_header.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

Services.prefs.setBoolPref("network.http.debug-observations", true);

registerCleanupFunction(function () {

  Services.prefs.clearUserPref("network.http.debug-observations");

});

// Test steps:

// 1. Load file_link_header.sjs

// 2.`<link rel="preconnect" href="https://localhost">` is in

//    file_link_header.sjs, so we will create a speculative connection.

// 3. We use "speculative-connect-request" topic to observe whether the

//    speculative connection is attempted.

// 4. Finally, we check if the observed host and partition key are the same and

//    as the expected.

add_task(async function test_link_preconnect() {

  let requestUrl = `https://example.com/browser/netwerk/test/browser/file_link_header.sjs`;

  let observed = "";

  let observer = {

    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),

    observe(aSubject, aTopic, aData) {

      if (aTopic == "speculative-connect-request") {

        Services.obs.removeObserver(observer, "speculative-connect-request");

        observed = aData;

},

};

  Services.obs.addObserver(observer, "speculative-connect-request");

  await BrowserTestUtils.withNewTab(

      gBrowser,

      url: requestUrl,

      waitForLoad: true,

},

    async function () {}

);

  // The hash key should be like:

  // ".S........[tlsflags0x00000000]localhost:443^partitionKey=%28https%2Cexample.com%29"

  // Extracting "localhost:443"

  let hostPortRegex = /\[.*\](.*?)\^/;

  let hostPortMatch = hostPortRegex.exec(observed);

  let hostPort = hostPortMatch ? hostPortMatch[1] : "";

  // Extracting "%28https%2Cexample.com%29"

  let partitionKeyRegex = /\^partitionKey=(.*)$/;

  let partitionKeyMatch = partitionKeyRegex.exec(observed);

  let partitionKey = partitionKeyMatch ? partitionKeyMatch[1] : "";

  Assert.equal(hostPort, "localhost:443");

  Assert.equal(partitionKey, "%28https%2Cexample.com%29");

});