CODEWITHSUNDEEP
javajavafxwebview
Kröw
Kröw

Reputation: 315

JavaFX WebEngine set document location

I am sending a request to a website manually, and rendering the response's body in a WebView. For this, I've used the WebView's engine's loadContent method:

String bodyOfResponse = ...;
myWebView.getEngine().loadContent(bodyOfResponse);

The problem with this, is that the WebView gets its content off a String, not a location, so it has no idea how to resolve relative links in HTML of the content I give it:

<span onclick="document.location.href='/'">Home</span>

The WebView can't find what that '/' refers to, since I didn't give the WebView content via a URL. Is there a way that I can set the current document's location (or baseURI, I've heard it called) so that my WebView will know how to resolve relative paths? (I know the original server's URL.)

I've seen that using an absolute location in the content, rather than a relative one, is enough to get the WebView to load the data at the location, but I can't modify the server and have it serve me absolute URLs in all HTML pages.

It would be splendid if I could just webEngine.setBasePath(serverURL)... but I can't. :(

Upvotes: 1

Views: 381

Answers (1)

VGR
VGR

Reputation: 44345

Wait for the WebEngine’s Document to finish loading, then add a <base> element inside <head>:

String newBaseURL = "http://www.example.com/app";

myWebView.getEngine().getLoadWorker().stateProperty().addListener(
    (obs, old, state) -> {
        if (state == Worker.State.SUCCEEDED) {
            Document doc = myWebView.getEngine().getDocument();

            XPath xpath = XPathFactory.newInstance().newXPath();
            try {
                Element base = (Element) xpath.evaluate(
                    "//*[local-name()='head']/*[local-name()='base']",
                    doc, XPathConstants.NODE);

                if (base == null) {

                    Element head = (Element) xpath.evaluate(
                        "//*[local-name()='head']",
                        doc, XPathConstants.NODE);

                    if (head == null) {
                        head = doc.createElement("head");

                        Element html = (Element) xpath.evaluate(
                            "//*[local-name()='html']",
                            doc, XPathConstants.NODE);
                        html.insertBefore(head, html.getFirstChild());
                    }

                    base = doc.createElement("base");
                    head.insertBefore(base, head.getFirstChild());
                }

                base.setAttribute("href", newBaseURL);

            } catch (XPathException e) {
                e.printStackTrace();
            }
        }
    });
myWebView.getEngine().loadContent(bodyOfResponse);

Upvotes: 2

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