Allow only selected domains

[SilentCoderHere]

Is your feature request connected to a problem you're trying to solve? Please describe.
I would like to request a feature by which only selected domains will allowed to connect.

Describe the possible solution according to you (if any)
Add options in properties file e.g. block non listed domains and list of domains. If block non listed domains is true then override shouldInterceptRequest function to only allow domains that are listed in list.

Additional context

public static boolean BLOCK_DOMAINS = true;
public static List<String> ALLOWED_DOMAINS = Arrays.asList("allowed.domain");

@Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
    // Skip if block domains is false
    if (!SWVContext.BLOCK_DOMAINS) {
        return super.shouldInterceptRequest(view, request);
    }
    
    String url = request.getUrl().toString();
    
    // Necessary URLs
    if (url.startsWith("file://") || url.startsWith("data:") || url.startsWith("about:")) {
        return super.shouldInterceptRequest(view, request);
    }
    
    String domain = "";
    try {
        URI uri = new URI(url);
        String host = uri.getHost();
        if (host != null) {
            domain = host.toLowerCase().replaceFirst("^www\\.", "");
        }
    } catch (Exception e) {
        return super.shouldInterceptRequest(view, request);
    }
    
    boolean isAllowed = false;
    for (String allowed : SWVContext.ALLOWED_DOMAINS) {
        String normalizedAllowed = allowed.toLowerCase().replaceFirst("^www\\.", "");
        if (domain.equals(normalizedAllowed) || domain.endsWith("." + normalizedAllowed)) {
            isAllowed = true;
            break;
        }
    }
    
    // Block! Not listed in domains
    if (!isAllowed) {
        return new WebResourceResponse("text/plain", "utf-8", null);
    }
    
    return super.shouldInterceptRequest(view, request);
}

[mgks]

We already have a solution for that external.url.exception.list, usage:

# Comma-separated, no spaces. Example: domain1.com,sub.domain2.com
external.url.exception.list=mgks.dev,mgks.github.io

You can use this property to list all the domains to be allowed in the app.