I am using a WebView control on MAUI (android). I need to check the answers from post queries that are running in the background. In Windows version I could use e.g. the WebResourceResponseReceived event for this purpose. I tried to overwrite ClientWebView but I don't know what method to look for.

I am using a WebView control on MAUI (android). I need to check the answers from post queries that are running in the background. In Windows version I could use e.g. the WebResourceResponseReceived event for this purpose. I tried to overwrite ClientWebView but I don't know what method to look for.

• android
• webview
• maui

• To intercept requests and responses in a .NET MAUI WebView on Android, you can use the WebViewClient.ShouldInterceptRequest method. – Guangyu Bai - MSFT Commented Feb 5 at 5:45
• I ovverride ShouldInterceptRequest but still does not know how to get content of response? – Intellicore Commented Feb 5 at 14:23
• It depends on how you build it and what kind of content you want to get. You can also look at the examples to modify them。 – Guangyu Bai - MSFT Commented Feb 7 at 7:58

1 Answer 1

To retrieve the content of a response when overriding ShouldInterceptRequest in a custom WebView on Android, you need to handle the request and provide a custom response.

Unfortunately, the ShouldInterceptRequest as mentioned above in the comments; itself does not allow direct access to the response content; instead, you can create a custom response using WebResourceResponse.

Here is an example on how to do this:

using Microsoft.Maui.Controls;
using Microsoft.Maui.Controls.Handlers;
using Android.Webkit;
using System.Net.Http;
using System.Threading.Tasks;

namespace YourNamespace
{
  public class CustomWebView : WebView
  {
    // You can add additional properties or methods here
  }

  public class CustomWebViewHandler : WebViewHandler
  {
    protected override WebView CreateNativeView()
    {
        var webView = new WebView(Context);
        webView.SetWebViewClient(new CustomWebViewClient());
        return webView;
    }

    private class CustomWebViewClient : WebViewClient
    {
        public override async WebResourceResponse ShouldInterceptRequest(WebView view, IWebResourceRequest request)
        {
            var url = request.Url.ToString();

            // Make an asynchronous HTTP request to get the response content
            var content = await GetContentAsync(url);

            // Create a WebResourceResponse with the content
            var response = new WebResourceResponse(
                "text/html", // MIME type
                "UTF-8", // Encoding
                new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(content))); // Content stream

            return response;
        }

        private async Task<string> GetContentAsync(string url)
        {
            using (var httpClient = new HttpClient())
            {
                var response = await httpClient.GetStringAsync(url);
                return response;
            }
        }
    }
  }
}