[BlazorWebView] Implement web request interception

[mattleibow]

This is the same work as #28876, but for BlazorWebView.

Fixes #11382

This pull request introduces significant enhancements to the BlazorWebView component, focusing on adding request interception capabilities, improving logging, and expanding test coverage. Key changes include implementing a new event for handling web resource requests, integrating logging for intercepted requests, and adding device tests to validate the new functionality.

Enhancements to Request Interception:

• Added the WebResourceRequested event to BlazorWebView, enabling applications to intercept and handle web resource requests. This includes methods for setting custom responses. (src/BlazorWebView/src/Maui/BlazorWebView.cs, [1] [2]
• Updated IBlazorWebView to implement the IWebRequestInterceptingWebView interface, supporting request interception. (src/BlazorWebView/src/Maui/IBlazorWebView.cs, src/BlazorWebView/src/Maui/IBlazorWebView.csL11-R11)
• Enhanced platform-specific implementations (Android, iOS, Windows) to handle intercepted requests by checking if the app wants to override them, processing Blazor-specific resources, or letting the request proceed as usual. (src/BlazorWebView/src/Maui/Android/WebKitWebViewClient.cs, [1] [2]; src/BlazorWebView/src/Maui/iOS/BlazorWebViewHandler.iOS.cs, [3] [4]; src/BlazorWebView/src/Maui/Windows/WinUIWebViewManager.cs, [5] [6] [7]

Logging Improvements:

• Introduced detailed logging for intercepted requests, including debug messages for handling, modifying, or bypassing requests. (src/BlazorWebView/src/Maui/Android/WebKitWebViewClient.cs, [1]; src/BlazorWebView/src/Maui/iOS/BlazorWebViewHandler.iOS.cs, [2]; src/BlazorWebView/src/Maui/Windows/WinUIWebViewManager.cs, [3]

Test Coverage Expansion:

• Added new device tests to validate the functionality of request interception, logging, and navigation:
  • BlazorWebViewComponentTests tests interactions with Razor components. (src/BlazorWebView/tests/MauiDeviceTests/Elements/BlazorWebViewComponentTests.cs, src/BlazorWebView/tests/MauiDeviceTests/Elements/BlazorWebViewComponentTests.csR1-R59)
  • BlazorWebViewLoggingTests verifies that request logs are generated correctly. (src/BlazorWebView/tests/MauiDeviceTests/Elements/BlazorWebViewLoggingTests.cs, src/BlazorWebView/tests/MauiDeviceTests/Elements/BlazorWebViewLoggingTests.csR1-R59)
  • BlazorWebViewNavigationTests ensures the StartPath property is respected during navigation. (src/BlazorWebView/tests/MauiDeviceTests/Elements/BlazorWebViewNavigationTests.cs, src/BlazorWebView/tests/MauiDeviceTests/Elements/BlazorWebViewNavigationTests.csR1-R42)

Minor Updates:

• Removed an unused file reference from the project file. (src/BlazorWebView/src/Maui/Microsoft.AspNetCore.Components.WebView.Maui.csproj, src/BlazorWebView/src/Maui/Microsoft.AspNetCore.Components.WebView.Maui.csprojL36)
• Added missing using directives to improve code clarity. (src/BlazorWebView/src/Maui/Android/WebKitWebViewClient.cs, [1]; src/BlazorWebView/src/Maui/BlazorWebView.cs, [2]; src/BlazorWebView/src/Maui/iOS/BlazorWebViewHandler.iOS.cs, [3]

These changes significantly enhance the extensibility and debugging capabilities of BlazorWebView while ensuring robust test coverage for the new features.

[Copilot]

Pull Request Overview

This pull request enhances the BlazorWebView component by adding web resource request interception, detailed logging, and expanded device tests. Key changes include:

• Introducing the WebResourceRequested event and corresponding interception logic in BlazorWebView and platform-specific handlers.
• Enhancing logging to provide detailed debug information when handling web requests.
• Expanding and improving device tests to validate the new interception functionality.

Reviewed Changes

Copilot reviewed 37 out of 37 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/MauiDeviceTests/WebViewHelpers.*	Refactored retry logic and added new helper methods for asynchronous script execution.
tests/MauiDeviceTests/Elements/*	Added new test classes for component, navigation, logging, and service behavior while removing redundant test files.
src/Maui/iOS/BlazorWebViewHandler.iOS.cs	Added request interception and logging logic for iOS.
src/Maui/Windows/WinUIWebViewManager.cs	Updated request handling to integrate interception and improved logging.
src/Maui/IBlazorWebView.cs & BlazorWebView.cs	Extended the public API with a new WebResourceRequested event and corresponding interface implementation.
src/Maui/Android/WebKitWebViewClient.cs	Enhanced interception logic and logging for Android.
src/Maui/Microsoft.AspNetCore.Components.WebView.Maui.csproj	Removed an unused file reference to streamline the project.

Comments suppressed due to low confidence (1)

[rmarinho]

Failing tests not related.