110 lines
3.7 KiB
C#
110 lines
3.7 KiB
C#
// <copyright file="ExceptionMiddleware.cs" company="alveus.dev">
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// Copyright (c) alveus.dev. All rights reserved. Licensed under the MIT License.
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// </copyright>
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using System.Net;
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using Astral.ApiServer.Core;
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using Astral.ApiServer.Models.Common;
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using Astral.Core.Constants;
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using Astral.Core.Exceptions;
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using FluentValidation;
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namespace Astral.ApiServer.Middleware;
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/// <summary>
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/// Handle exceptions caught in a request.
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/// </summary>
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public class ExceptionMiddleware
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{
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private readonly ILogger<ExceptionMiddleware> _logger;
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private readonly RequestDelegate _next;
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/// <summary>
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/// Initializes a new instance of the <see cref="ExceptionMiddleware" /> class.
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/// </summary>
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/// <param name="next">Instance of <see cref="RequestDelegate" />.</param>
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/// <param name="logger">Instance of <see cref="ILogger" />.</param>
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public ExceptionMiddleware(
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RequestDelegate next,
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ILogger<ExceptionMiddleware> logger)
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{
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_next = next;
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_logger = logger;
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}
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/// <summary>
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/// Invoke middleware.
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/// </summary>
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/// <param name="httpContext">Instance of <see cref="HttpContext" />.</param>
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public async Task InvokeAsync(HttpContext httpContext)
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{
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try
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{
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await _next(httpContext);
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}
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catch (ServiceException exception)
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{
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await HandleServiceExceptionAsync(httpContext, exception);
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}
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catch (ValidationException exception)
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{
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await HandleValidationExceptionAsync(httpContext, exception);
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}
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catch (Exception exception)
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{
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_logger.LogError(
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"Unhandled Exception: {path} using {method}: {exception}",
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httpContext.Request.Path,
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httpContext.Request.Method,
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exception);
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await HandleOtherExceptionAsync(httpContext);
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}
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}
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/// <summary>
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/// Api exception.
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/// </summary>
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/// <param name="context">Instance of <see cref="HttpContext" />.</param>
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/// <param name="exception">Instance of <see cref="ValidationException" />.</param>
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private static async Task HandleServiceExceptionAsync(HttpContext context, ServiceException exception)
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{
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context.Response.ContentType = "application/json";
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context.Response.StatusCode = (int)exception.HttpStatusCode;
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await context.Response.WriteAsJsonAsync(new ErrorResponseModel
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{
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Error = exception.ErrorCode,
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Message = exception.ErrorMessage
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});
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}
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/// <summary>
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/// Validation failed.
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/// </summary>
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/// <param name="context">Instance of <see cref="HttpContext" />.</param>
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/// <param name="exception">Instance of <see cref="ValidationException" />.</param>
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private static async Task HandleValidationExceptionAsync(HttpContext context, ValidationException exception)
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{
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context.Response.ContentType = "application/json";
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context.Response.StatusCode = StatusCodes.Status422UnprocessableEntity;
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await context.Response.WriteAsJsonAsync(new ErrorResponseModel
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{
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Error = CoreErrorCodes.ValidationError,
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Message = exception.Message
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});
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}
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/// <summary>
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/// Unexpected exception.
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/// </summary>
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/// <param name="context">Instance of <see cref="HttpContext" />.</param>
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private static async Task HandleOtherExceptionAsync(HttpContext context)
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{
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context.Response.ContentType = "application/json";
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context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
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await context.Response.WriteAsJsonAsync(new ErrorResponseModel
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{
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Error = ApiErrorCodes.UnknownError,
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Message = "Something went wrong. Try again later"
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});
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}
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}
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