Refactor LoginPage to MVVM

Jugenddienst Stunden/Infrastructure/RequestLoggingHandler.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Jugenddienst_Stunden.Infrastructure; 
+internal sealed class RequestLoggingHandler : DelegatingHandler {
+	protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
+		// Log outgoing request URI + headers
+		Debug.WriteLine($"[Http] Request: {request.Method} {request.RequestUri}");
+		foreach (var h in request.Headers) {
+			Debug.WriteLine($"[Http] RequestHeader: {h.Key} = {string.Join(", ", h.Value)}");
+		}
+		if (request.Content is not null) {
+			foreach (var h in request.Content.Headers) {
+				Debug.WriteLine($"[Http] ContentHeader: {h.Key} = {string.Join(", ", h.Value)}");
+			}
+		}
+
+		var response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
+
+		// Log response status + Location (bei Redirects) + final request URI used by handler
+		Debug.WriteLine($"[Http] Response: {(int)response.StatusCode} {response.ReasonPhrase}");
+		if (response.Headers.Location is not null)
+			Debug.WriteLine($"[Http] Response Location: {response.Headers.Location}");
+		if (response.RequestMessage?.RequestUri is not null)
+			Debug.WriteLine($"[Http] Final RequestUri: {response.RequestMessage.RequestUri}");
+
+		return response;
+	}
+}