Get HTML from WKWebview in Swift

Question

I log into a website using WKWebView and now i would like to parse the html of the website. How can I access the websites html in swift? I know how it works for a UIWebView but not for WKWebView.

Thanks for your help!

Answer 1

If you wait until the page has loaded you can use:

webView.evaluateJavaScript("document.documentElement.outerHTML.toString()", 
                           completionHandler: { (html: Any?, error: Error?) in
    print(html)
})

You could also inject some javascript that returns you back the HTML.

let script = WKUserScript(source: javascriptString, injectionTime: injectionTime, forMainFrameOnly: true)
userContentController.addUserScript(script)
self.webView.configuration.userContentController.addScriptMessageHandler(self, name: "didGetHTML")

…

func userContentController(userContentController: WKUserContentController,
        didReceiveScriptMessage message: WKScriptMessage) {

        if message.name == "didGetHTML" {
            if let html = message.body as? String {
                print(html)
            }
        }
}

The javascript you could inject looks something like:

webkit.messageHandlers.didGetHTML.postMessage(document.documentElement.outerHTML.toString());