browser_favicon_pdf.js

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

// Tests that when a PDF is opened through PDF.js, the /favicon.ico request

// uses a content principal matching the PDF's https:// origin rather than the

// resource:// principal of the PDF viewer (bug 2015285). This ensures HTTP auth

// credentials cached for the PDF's origin are forwarded correctly.

const PDF_URL =

  "https://example.com/browser/browser/base/content/test/favicons/blank.pdf";

const FAVICON_URL = "https://example.com/favicon.ico";

add_task(async function test_pdf_favicon_uses_page_principal() {

  let faviconLoadingPrincipal;

  const { promise: observerDone, resolve: observerResolve } =

    Promise.withResolvers();

  const observer = {

    observe(subject, topic) {

      if (topic !== "http-on-modify-request") {

        return;

      const channel = subject.QueryInterface(Ci.nsIChannel);

      if (channel.URI.spec !== FAVICON_URL) {

        return;

      faviconLoadingPrincipal = channel.loadInfo?.loadingPrincipal;

      observerResolve();

},

};

  Services.obs.addObserver(observer, "http-on-modify-request");

  const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, PDF_URL);

  // The favicon request fires during page load.

  await observerDone;

  Services.obs.removeObserver(observer, "http-on-modify-request");

  await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {

    const viewer = content.wrappedJSObject.PDFViewerApplication;

    await viewer.testingClose();

});

  BrowserTestUtils.removeTab(tab);

  Assert.ok(

    faviconLoadingPrincipal,

    "Should have seen a /favicon.ico request for the PDF's domain"

);

is(

    faviconLoadingPrincipal.URI?.scheme,

    "https",

    "Favicon channel loadingPrincipal should use https://, not resource://"

);

});