Webview shouldOverrideUrlLoading not catching URL requests

Question

I am trying to parse every click event, intercept the http url that attempts to load into the webview, and decide if it should be shown depending on a set of logic as per how the url parses. I have followed the advice on these 3 StackOverflow links:

1) Intercept and override HTTP requests from WebView

2) Android Web-View shouldOverrideUrlLoading() Deprecated.(Alternative)

3) https://stackoverflow.com/a/32711309/2480714

without it fixing my issue. The main issue is that a user clicks on the webview to load a hyperlink and it is seems like the shouldOverrideUrlLoading method is not being called or is not intercepting the url properly every time.

I created my Custom WebViewClient and overrode it first with the intent of stopping all loads without my approval, but I have run into a snag; some urls are loading and bypassing my override methods and some are not. I have no clue why this is happening.

Here is my WebviewClient class:

public class CustomWebViewClient2 extends WebViewClient {

    public CustomWebViewClient2(){

    }

    @Override
    public void onPageFinished(WebView view, String url) {
        Log.d("log", "(CustomWebViewClient) onPageFinished, URL == " + url);
    }


    @SuppressLint("NewApi")
    @Nullable
    @Override
    public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
        Log.d("log", "shouldInterceptRequest hit");
        return null;
    }

    @Nullable
    @Override
    public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
        Log.d("log", "shouldInterceptRequest hit");
        return null;
    }

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        Log.d("log", "(CustomWebViewClient) shouldOverrideUrlLoading");
        return true;
    }

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        Log.d("log", "(CustomWebViewClient) shouldOverrideUrlLoading");
        return true;
    }


    @Override
    public void onLoadResource(WebView view, String url) {
        Log.d("log", "intercepting onLoadResource, url == " + url);
    }


    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        Log.d("log", "onPageStarted url == " + url);
    }
}

As you can see, it is overriding the correct methods and should (in theory) never load a URL unless I pass it to the webview to load, but unfortunately some websites are loading, and others are not.

I also tried disabling the cache as per this comment in one of the answers:

"A word of CAUTION! If you intercept an attempt by the browser to retrieve an image (or probably any resource) and then return null (meaning let the WebView continue retrieving the image), any future requests to this resource might just go to the cache and will NOT trigger shouldInterceptRequest(). If you want to intercept EVERY image request, you need to disable the cache or (what I did) call WebView.clearCache(true)"

but to no avail. Why are some URLs loading in and bypassing the override, but others are not?

Update 1: Here is a sample URL https://cookpad.com/us that mirrors the issue I am referring to. It seems to be related to Turbolinks being implemented on the server-side.

Webview shouldOverrideUrlLoading not catching URL requests

0 Answers0