ref: project structure

api/Middleware/ApiExceptionMiddleware.cs

@@ -0,0 +1,46 @@
+using System.Text.Json;
+using mws.backend.dotnet.application.Common;
+
+namespace mws.backend.dotnet.api.Middleware;
+
+public class ApiExceptionMiddleware(RequestDelegate next, ILogger<ApiExceptionMiddleware> logger)
+{
+    public async Task InvokeAsync(HttpContext context)
+    {
+        try
+        {
+            await next(context);
+        }
+        catch (Exception ex)
+        {
+            await HandleAsync(context, ex);
+        }
+    }
+
+    private async Task HandleAsync(HttpContext context, Exception ex)
+    {
+        var (statusCode, message) = ex switch
+        {
+            BadRequestException => (StatusCodes.Status400BadRequest, ex.Message),
+            UnauthorizedException => (StatusCodes.Status401Unauthorized, ex.Message),
+            ForbiddenException => (StatusCodes.Status403Forbidden, ex.Message),
+            NotFoundException => (StatusCodes.Status404NotFound, ex.Message),
+            _ => (StatusCodes.Status500InternalServerError, "An unexpected error occurred"),
+        };
+
+        if (statusCode == StatusCodes.Status500InternalServerError)
+        {
+            logger.LogError(ex, "Unhandled exception in {Path}", context.Request.Path);
+        }
+
+        context.Response.StatusCode = statusCode;
+        context.Response.ContentType = "application/json";
+        await context.Response.WriteAsync(JsonSerializer.Serialize(new { message }));
+    }
+}
+
+public static class ApiExceptionMiddlewareExtensions
+{
+    public static IApplicationBuilder UseApiExceptionMiddleware(this IApplicationBuilder app)
+        => app.UseMiddleware<ApiExceptionMiddleware>();
+}