[WPF] WebView2 のイベントをデバッグで確認してみる

using System;
using System.Diagnostics;
using System.IO;
using Microsoft.Web.WebView2.Core;

namespace WebView2Study;

internal partial class MainWindow
{
    public MainWindow()
    {
        InitializeComponent();
        InitAsync();
    }

    private async void InitAsync()
    {
        await WebView.EnsureCoreWebView2Async();

        // WebView2 Runtime Version
        Debug.Print($"BrowserVersionString = {WebView.CoreWebView2.Environment.BrowserVersionString}");

        // WebView
        WebView.ContentLoading += WebViewOnContentLoading;
        WebView.CoreWebView2InitializationCompleted += WebViewOnCoreWebView2InitializationCompleted;
        WebView.NavigationCompleted += WebViewOnNavigationCompleted;
        WebView.NavigationStarting += WebViewOnNavigationStarting;
        WebView.SourceChanged += WebViewOnSourceChanged;
        WebView.WebMessageReceived += WebViewOnWebMessageReceived;
        WebView.ZoomFactorChanged += WebViewOnZoomFactorChanged;

        // WebView.CoreWebView2
        WebView.CoreWebView2.BasicAuthenticationRequested += CoreWebView2OnBasicAuthenticationRequested;
        WebView.CoreWebView2.ClientCertificateRequested += CoreWebView2OnClientCertificateRequested;
        WebView.CoreWebView2.ContainsFullScreenElementChanged += CoreWebView2OnContainsFullScreenElementChanged;
        WebView.CoreWebView2.ContentLoading += CoreWebView2OnContentLoading;
        WebView.CoreWebView2.ContextMenuRequested += CoreWebView2OnContextMenuRequested;
        WebView.CoreWebView2.DocumentTitleChanged += CoreWebView2OnDocumentTitleChanged;
        WebView.CoreWebView2.DOMContentLoaded += CoreWebView2OnDOMContentLoaded;
        WebView.CoreWebView2.DownloadStarting += CoreWebView2OnDownloadStarting;
        WebView.CoreWebView2.FrameCreated += CoreWebView2OnFrameCreated;
        WebView.CoreWebView2.FrameNavigationCompleted += CoreWebView2OnFrameNavigationCompleted;
        WebView.CoreWebView2.FrameNavigationStarting += CoreWebView2OnFrameNavigationStarting;
        WebView.CoreWebView2.HistoryChanged += CoreWebView2OnHistoryChanged;
        WebView.CoreWebView2.IsDefaultDownloadDialogOpenChanged += CoreWebView2OnIsDefaultDownloadDialogOpenChanged;
        WebView.CoreWebView2.IsDocumentPlayingAudioChanged += CoreWebView2OnIsDocumentPlayingAudioChanged;
        WebView.CoreWebView2.IsMutedChanged += CoreWebView2OnIsMutedChanged;
        WebView.CoreWebView2.NavigationCompleted += CoreWebView2OnNavigationCompleted;
        WebView.CoreWebView2.NavigationStarting += CoreWebView2OnNavigationStarting;
        WebView.CoreWebView2.NewWindowRequested += CoreWebView2OnNewWindowRequested;
        WebView.CoreWebView2.PermissionRequested += CoreWebView2OnPermissionRequested;
        WebView.CoreWebView2.ProcessFailed += CoreWebView2OnProcessFailed;
        WebView.CoreWebView2.ScriptDialogOpening += CoreWebView2OnScriptDialogOpening;
        WebView.CoreWebView2.ServerCertificateErrorDetected += CoreWebView2OnServerCertificateErrorDetected;
        WebView.CoreWebView2.SourceChanged += CoreWebView2OnSourceChanged;
        WebView.CoreWebView2.StatusBarTextChanged += CoreWebView2OnStatusBarTextChanged;
        WebView.CoreWebView2.WebMessageReceived += CoreWebView2OnWebMessageReceived;
        WebView.CoreWebView2.WebResourceRequested += CoreWebView2OnWebResourceRequested;
        WebView.CoreWebView2.WebResourceResponseReceived += CoreWebView2OnWebResourceResponseReceived;
        WebView.CoreWebView2.WindowCloseRequested += CoreWebView2OnWindowCloseRequested;

        WebView.Source = new Uri("https://developer.microsoft.com/microsoft-edge/webview2/");
    }

    // WebView2

    private void WebViewOnContentLoading(object? sender, CoreWebView2ContentLoadingEventArgs e)
    {
        Debug.Print($"WebView.ContentLoading: {nameof(e.IsErrorPage)} = {e.IsErrorPage}, {nameof(e.NavigationId)} = {e.NavigationId}");
    }

    private void WebViewOnCoreWebView2InitializationCompleted(object? sender, CoreWebView2InitializationCompletedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2InitializationCompleted: {nameof(e.IsSuccess)} = {e.IsSuccess}, {nameof(e.InitializationException)} = {e.InitializationException}");
    }

    private void WebViewOnNavigationCompleted(object? sender, CoreWebView2NavigationCompletedEventArgs e)
    {
        Debug.Print($"WebView.NavigationCompleted: {nameof(e.NavigationId)} = {e.NavigationId}, {nameof(e.IsSuccess)} = {e.IsSuccess}, {nameof(e.HttpStatusCode)} = {e.HttpStatusCode}, {nameof(e.WebErrorStatus)} = {e.WebErrorStatus}");
    }

    private void WebViewOnNavigationStarting(object? sender, CoreWebView2NavigationStartingEventArgs e)
    {
        Debug.Print($"WebView.NavigationStarting: {nameof(e.NavigationId)} = {e.NavigationId}, {e.Uri}");
    }

    private void WebViewOnSourceChanged(object? sender, CoreWebView2SourceChangedEventArgs e)
    {
        Debug.Print($"WebView.SourceChanged: {nameof(e.IsNewDocument)} = {e.IsNewDocument}");
    }

    private void WebViewOnWebMessageReceived(object? sender, CoreWebView2WebMessageReceivedEventArgs e)
    {
        Debug.Print($"WebView.WebMessageReceived: {nameof(e.Source)} = {e.WebMessageAsJson}");
    }

    private void WebViewOnZoomFactorChanged(object? sender, EventArgs e)
    {
        Debug.Print("WebView.ZoomFactorChanged:");
    }

    // WebView.CoreWebView2

    private void CoreWebView2OnBasicAuthenticationRequested(object? sender, CoreWebView2BasicAuthenticationRequestedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.BasicAuthenticationRequested: {nameof(e.Uri)} = {e.Uri}");
    }

    private void CoreWebView2OnClientCertificateRequested(object? sender, CoreWebView2ClientCertificateRequestedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.ClientCertificateRequested: {nameof(e.Host)} = {e.Host}");
    }

    private void CoreWebView2OnContainsFullScreenElementChanged(object? sender, object e)
    {
        Debug.Print($"WebView.CoreWebView2.ContainsFullScreenElementChanged: {e}");
    }

    private void CoreWebView2OnContentLoading(object? sender, CoreWebView2ContentLoadingEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.ContentLoading {nameof(e.IsErrorPage)} = {e.IsErrorPage}, {nameof(e.NavigationId)} = {e.NavigationId}");
    }

    private void CoreWebView2OnContextMenuRequested(object? sender, CoreWebView2ContextMenuRequestedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.ContextMenuRequested: {nameof(e.ContextMenuTarget)} = {e.ContextMenuTarget.SelectionText}");
    }

    private void CoreWebView2OnDocumentTitleChanged(object? sender, object e)
    {
        Debug.Print($"WebView.CoreWebView2.DocumentTitleChanged: {(sender as CoreWebView2)?.DocumentTitle}");
    }

    private void CoreWebView2OnDOMContentLoaded(object? sender, CoreWebView2DOMContentLoadedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.DOMContentLoaded: {nameof(e.NavigationId)} = {e.NavigationId}");
    }

    private void CoreWebView2OnDownloadStarting(object? sender, CoreWebView2DownloadStartingEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.DownloadStarting: {nameof(e.ResultFilePath)} = {e.ResultFilePath}");
    }

    private void CoreWebView2OnFrameCreated(object? sender, CoreWebView2FrameCreatedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.FrameCreated: {nameof(e.Frame)} = {e.Frame.Name}");
    }

    private void CoreWebView2OnFrameNavigationCompleted(object? sender, CoreWebView2NavigationCompletedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.FrameNavigationCompleted: {nameof(e.NavigationId)} = {e.NavigationId}, {nameof(e.IsSuccess)} = {e.IsSuccess}, {nameof(e.HttpStatusCode)} = {e.HttpStatusCode}, {nameof(e.WebErrorStatus)} = {e.WebErrorStatus}");
    }

    private void CoreWebView2OnFrameNavigationStarting(object? sender, CoreWebView2NavigationStartingEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.FrameNavigationStarting: {nameof(e.NavigationId)} = {e.NavigationId}, {nameof(e.Uri)} = {e.Uri}");
    }

    private void CoreWebView2OnHistoryChanged(object? sender, object e)
    {
        Debug.Print("WebView.CoreWebView2.HistoryChanged:");
    }

    private void CoreWebView2OnIsDefaultDownloadDialogOpenChanged(object? sender, object e)
    {
        Debug.Print("WebView.CoreWebView2.IsDefaultDownloadDialogOpenChanged:");
    }

    private void CoreWebView2OnIsDocumentPlayingAudioChanged(object? sender, object e)
    {
        Debug.Print("WebView.CoreWebView2.IsDocumentPlayingAudioChanged");
    }

    private void CoreWebView2OnIsMutedChanged(object? sender, object e)
    {
        Debug.Print($"WebView.CoreWebView2.IsMutedChanged:");
    }

    private async void CoreWebView2OnNavigationCompleted(object? sender, CoreWebView2NavigationCompletedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.NavigationCompleted: {nameof(e.NavigationId)} = {e.NavigationId}, {nameof(e.IsSuccess)} = {e.IsSuccess}");
    }

    private void CoreWebView2OnNavigationStarting(object? sender, CoreWebView2NavigationStartingEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.NavigationStarting: {nameof(e.NavigationId)} = {e.NavigationId}, {e.Uri}");
    }

    private void CoreWebView2OnNewWindowRequested(object? sender, CoreWebView2NewWindowRequestedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.NewWindowRequested: {nameof(e.Name)} = {e.Name}, {nameof(e.Uri)} = {e.Uri}");
    }

    private void CoreWebView2OnPermissionRequested(object? sender, CoreWebView2PermissionRequestedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.PermissionRequested: {nameof(e.PermissionKind)} = {e.PermissionKind}, {nameof(e.State)} = {e.State}, {nameof(e.Uri)} = {e.Uri}");
    }

    private void CoreWebView2OnProcessFailed(object? sender, CoreWebView2ProcessFailedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.ProcessFailed: {nameof(e.ExitCode)} = {e.ExitCode}, {nameof(e.Reason)} = {e.Reason}, {nameof(e.ProcessDescription)} = {e.ProcessDescription}");
    }

    private void CoreWebView2OnScriptDialogOpening(object? sender, CoreWebView2ScriptDialogOpeningEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.ScriptDialogOpening: {nameof(e.Kind)} = {e.Kind}, {nameof(e.ResultText)} = {e.ResultText}, {nameof(e.DefaultText)} = {e.DefaultText}, {nameof(e.Message)} = {e.Message}, {nameof(e.Uri)} = {e.Uri}");
    }

    private void CoreWebView2OnServerCertificateErrorDetected(object? sender, CoreWebView2ServerCertificateErrorDetectedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.ServerCertificateErrorDetected: {nameof(e.Action)} = {e.Action}, {nameof(e.ErrorStatus)} = {e.ErrorStatus}, {nameof(e.ServerCertificate.DisplayName)} = {e.ServerCertificate.DisplayName}, {nameof(e.RequestUri)} = {e.RequestUri}");
    }

    private void CoreWebView2OnSourceChanged(object? sender, CoreWebView2SourceChangedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.SourceChanged: {nameof(e.IsNewDocument)} = {e.IsNewDocument}");
    }

    private void CoreWebView2OnStatusBarTextChanged(object? sender, object e)
    {
        Debug.Print($"WebView.CoreWebView2.StatusBarTextChanged: {(sender as CoreWebView2)?.StatusBarText}");
    }

    private void CoreWebView2OnWebMessageReceived(object? sender, CoreWebView2WebMessageReceivedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.WebMessageReceived: {nameof(e.Source)} = {e.Source}, {nameof(e.WebMessageAsJson)} = {e.WebMessageAsJson}");
    }

    private void CoreWebView2OnWebResourceRequested(object? sender, CoreWebView2WebResourceRequestedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.WebResourceRequested: {nameof(e.ResourceContext)} = {e.ResourceContext}, {nameof(e.Response.StatusCode)} = {e.Response.StatusCode}, {nameof(e.Request.Uri)} = {e.Request.Uri}");
    }

    private async void CoreWebView2OnWebResourceResponseReceived(object? sender, CoreWebView2WebResourceResponseReceivedEventArgs e)
    {
        Debug.Print($"WebView.CoreWebView2.WebResourceResponseReceived: {nameof(e.Response.StatusCode)} = {e.Response.StatusCode}, {nameof(e.Request.Uri)} = {e.Request.Uri}");

        var requestContent = "";
        var responstContent = "";
        Exception? requestContentException = null;
        Exception? responseContentException = null;

        try
        {
            if (e.Request.Content is not null)
            {
                using var req = new StreamReader(e.Request.Content);
                requestContent = await req.ReadToEndAsync();
            }
        }
        catch (Exception exception)
        {
            requestContentException = exception;
        }

        try
        {
            await using var stream = await e.Response.GetContentAsync();
            if (stream is not null)
            {
                using var reader = new StreamReader(stream);
                responstContent = await reader.ReadToEndAsync();
            }
        }
        catch (Exception exception)
        {
            responseContentException = exception;
        }

        // Debugger.Break();
    }

    private void CoreWebView2OnWindowCloseRequested(object? sender, object e)
    {
        Debug.Print($"WebView.CoreWebView2.WindowCloseRequested:");
    }
}