middleware

dotnet/AipsWebApi/Middleware/ExceptionHandlingMiddleware.cs

@@ -0,0 +1,47 @@
+using AipsCore.Domain.Common.Validation;
+
+namespace AipsWebApi.Middleware;
+
+public sealed class ExceptionHandlingMiddleware
+{
+    private readonly RequestDelegate _next;
+    private readonly ILogger<ExceptionHandlingMiddleware> _logger;
+
+    public ExceptionHandlingMiddleware(
+        RequestDelegate next,
+        ILogger<ExceptionHandlingMiddleware> logger)
+    {
+        _next = next;
+        _logger = logger;
+    }
+
+    public async Task Invoke(HttpContext context)
+    {
+        try
+        {
+            await _next(context);
+        }
+        catch (ValidationException ex)
+        {
+            context.Response.StatusCode = StatusCodes.Status400BadRequest;
+            context.Response.ContentType = "application/json";
+
+            await context.Response.WriteAsJsonAsync(new
+            {
+                errors = ex.ValidationErrors
+            });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Unhandled exception");
+
+            context.Response.StatusCode = StatusCodes.Status500InternalServerError;
+            context.Response.ContentType = "application/json";
+
+            await context.Response.WriteAsJsonAsync(new
+            {
+                error = "Something went wrong"
+            });
+        }
+    }
+}