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ExceptionMiddleware.cs
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ExceptionMiddleware.cs
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using System.Net;
using System.Text.Json;
namespace BookStoreApp
{
public class ExceptionMiddleware
{
private readonly RequestDelegate _next;
private readonly ILogger<ExceptionMiddleware> _logger;
public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
{
_next = next;
_logger = logger;
}
public async Task InvokeAsync(HttpContext httpContext)
{
try
{
await _next(httpContext);
}
catch (Exception ex)
{
await HandleExceptionAsync(httpContext, ex);
}
}
private async Task HandleExceptionAsync(HttpContext context, Exception exception)
{
context.Response.ContentType = "application/json";
var response = context.Response;
var errorResponse = new ErrorResponse
{
Success = false
};
switch (exception)
{
case ApplicationException ex:
if (ex.Message.Contains("Invalid token"))
{
response.StatusCode = (int)HttpStatusCode.Forbidden;
errorResponse.Message = ex.Message;
break;
}
response.StatusCode = (int)HttpStatusCode.BadRequest;
errorResponse.Message = ex.Message;
break;
case KeyNotFoundException ex:
response.StatusCode = (int)HttpStatusCode.NotFound;
errorResponse.Message = ex.Message;
break;
default:
response.StatusCode = (int)HttpStatusCode.InternalServerError;
errorResponse.Message = "Internal Server errors. Check Logs!";
break;
}
_logger.LogError(exception.Message);
var result = JsonSerializer.Serialize(errorResponse);
await context.Response.WriteAsync(result);
}
}
}