Method initialize

src/main/java/org/htmlunit/html/HtmlPage.java:243–341

Initialize this page. @throws IOException if an IO problem occurs @throws FailingHttpStatusCodeException if the server returns a failing status code AND the property org.htmlunit.WebClientOptions#setThrowExceptionOnFailingStatusCode(boolean) is set to true.

()

     *         to true.
     */
    @Override
    public void initialize() throws IOException, FailingHttpStatusCodeException {
        final WebWindow enclosingWindow = getEnclosingWindow();
        final boolean isAboutBlank = getUrl() == UrlUtils.URL_ABOUT_BLANK;
        if (isAboutBlank) {
            // a frame contains first a faked "about:blank" before its real content specified by src gets loaded
            if (enclosingWindow instanceof FrameWindow window
                    && !window.getFrameElement().isContentLoaded()) {
                return;
            }

            // save the URL that should be used to resolve relative URLs in this page
            if (enclosingWindow instanceof TopLevelWindow topWindow) {
                final WebWindow openerWindow = topWindow.getOpener();
                if (openerWindow != null && openerWindow.getEnclosedPage() != null) {
                    baseUrl_ = openerWindow.getEnclosedPage().getWebResponse().getWebRequest().getUrl();
                }
            }
        }

        if (!isAboutBlank) {
            setReadyState(READY_STATE_INTERACTIVE);
            getDocumentElement().setReadyState(READY_STATE_INTERACTIVE);
            executeEventHandlersIfNeeded(Event.TYPE_READY_STATE_CHANGE);
        }

        executeDeferredScriptsIfNeeded();

        executeEventHandlersIfNeeded(Event.TYPE_DOM_DOCUMENT_LOADED);

        // postponed actions are more or less the async scripts,
        // they are running in real browsers whenever the download is done
        processPostponedActionsIfNeeded();

        loadFrames();

        // don't set the ready state if we really load the blank page into the window
        // see Node.initInlineFrameIfNeeded()
        if (!isAboutBlank) {
            setReadyState(READY_STATE_COMPLETE);
            getDocumentElement().setReadyState(READY_STATE_COMPLETE);
            executeEventHandlersIfNeeded(Event.TYPE_READY_STATE_CHANGE);
        }

        // frame initialization has a different order
        boolean isFrameWindow = enclosingWindow instanceof FrameWindow;
        boolean isFirstPageInFrameWindow = false;
        if (isFrameWindow) {
            isFrameWindow = ((FrameWindow) enclosingWindow).getFrameElement() instanceof HtmlFrame;

            final History hist = enclosingWindow.getHistory();
            if (hist.getLength() > 0 && UrlUtils.URL_ABOUT_BLANK == hist.getUrl(0)) {
                isFirstPageInFrameWindow = hist.getLength() <= 2;
            }
            else {
                isFirstPageInFrameWindow = enclosingWindow.getHistory().getLength() < 2;
            }
        }