add Global exception handler

Author: jicking

JixMinApi/Features/Todo/TodoEndpoints.cs

@@ -10,12 +10,12 @@ namespace JixMinApi.Features.Todo;
 
 public static class TodoEndpoints
 {
-    public static void InjectTodoEndpointServices(this IServiceCollection services)
+    public static void AddTodoEndpointServices(this IServiceCollection services)
     {
         services.AddDbContext<TodoDb>(opt => opt.UseInMemoryDatabase(Constants.TodoApiGroupName));
     }
 
-    public static void MapTodoEndpoints(this WebApplication app)
+    public static void UseTodoEndpoints(this WebApplication app)
     {
         var group = app.MapGroup(Constants.TodoApiRootPath)
             .WithOpenApi(x => new OpenApiOperation(x)

JixMinApi/Program.cs

@@ -1,4 +1,5 @@
 using JixMinApi.Features.Todo;
+using JixMinApi.Shared;
 using Microsoft.OpenApi.Models;
 using System.Reflection;
 
@@ -23,7 +24,10 @@
 builder.Services.AddMediatR(cfg => cfg.RegisterServicesFromAssembly(typeof(Program).Assembly));
 
 // Inject endpoint services
-builder.Services.InjectTodoEndpointServices();
+builder.Services.AddTodoEndpointServices();
+
+builder.Services.AddExceptionHandler<GlobalExceptionHandler>();
+builder.Services.AddProblemDetails();
 
 var app = builder.Build();
 
@@ -35,8 +39,7 @@
 }
 
 app.UseHttpsRedirection();
-
-// Map Endpoints
-app.MapTodoEndpoints();
+app.UseExceptionHandler();
+app.UseTodoEndpoints();
 
 app.Run();

JixMinApi/Shared/GlobalExceptionHandler.cs

@@ -0,0 +1,36 @@
+using Microsoft.AspNetCore.Diagnostics;
+using Microsoft.AspNetCore.Mvc;
+
+namespace JixMinApi.Shared;
+
+internal sealed class GlobalExceptionHandler : IExceptionHandler
+{
+    private readonly ILogger<GlobalExceptionHandler> _logger;
+
+    public GlobalExceptionHandler(ILogger<GlobalExceptionHandler> logger)
+    {
+        _logger = logger;
+    }
+
+    public async ValueTask<bool> TryHandleAsync(
+        HttpContext httpContext,
+        Exception exception,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogError(
+            exception, "Exception occurred: {Message}", exception.Message);
+
+        var problemDetails = new ProblemDetails
+        {
+            Status = StatusCodes.Status500InternalServerError,
+            Title = "Server error"
+        };
+
+        httpContext.Response.StatusCode = problemDetails.Status.Value;
+
+        await httpContext.Response
+            .WriteAsJsonAsync(problemDetails, cancellationToken);
+
+        return true;
+    }
+}