How to get json response with WebView2

Question

I wanna get a json from the response's body of this API:

// http://localhost:3000/api/auth/[token]
export default function Auth(request, response) {
    response.status(200).json({ token: request.query})
}

Trying the WebView.CoreWebView2.WebResourceResponseReceived event fires just once and the event arg's request Uri parameter is "http://localhost:3000/favicon.ico".

How can I get the response content?

What I did:

public partial class SignInUserControl : UserControl
{
    public SignInUserControl()
    {
        InitializeComponent();
        InitWebView();
    }
    async void InitWebView()
    {
        await WebView.EnsureCoreWebView2Async(null);
        WebView.CoreWebView2.WebResourceResponseReceived += CoreWebView2_WebResourceResponseReceived;
    }
    async void CoreWebView2_WebResourceResponseReceived(object sender, CoreWebView2WebResourceResponseReceivedEventArgs e)
    {
        try
        {
            Stream stream = await e.Response.GetContentAsync();
            TextReader tr = new StreamReader(stream);
            string re = tr.ReadToEnd();
        }
        catch { }
    }
}

What I expect:

http://localhost:3000/api/auth/42sad87aWasFGAS
re = {"token":"42sad87aWasFGAS"} // From CoreWebView2_WebResourceResponseReceived method

ps: The WebViewer2 Control is working. So I don't think the problem is related to its initialization. working example

Answer 1

The problem really was the WebView initialization. 🤦‍♂️ Thanks to @user09938 and @david-risney

What did I do? I removed the Source property from the Xaml and made these changes:

public partial class SignInUserControl : UserControl
{
    public SignInUserControl()
    {
        InitializeComponent();
        InitwebView();
    }
    private void InitwebView()
    {
        WebView.CoreWebView2InitializationCompleted += WebView_CoreWebView2InitializationCompleted;
        WebView.EnsureCoreWebView2Async(null).GetAwaiter();
        WebView.Source = new Uri("http://localhost:3000/api/auth/NelsonHenrique");
    }
    private void WebView_CoreWebView2InitializationCompleted(object sender, CoreWebView2InitializationCompletedEventArgs e)
    {
        WebView.CoreWebView2.WebResourceResponseReceived += CoreWebView2_WebResourceResponseReceived;
    }
    private void CoreWebView2_WebResourceResponseReceived(object sender, CoreWebView2WebResourceResponseReceivedEventArgs e)
    {
        var result = e.Response.GetContentAsync().GetAwaiter();
        result.OnCompleted(() =>
        {
            try
            {
                var res = result.GetResult();
                StreamReader reader = new StreamReader(res);
                string text = reader.ReadToEnd();
                // text: "{\"token\":\"NelsonHenrique\"}"
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }
        });
    }
}