/// <summary>
/// Sets up a custom exception handler in the application's pipeline.
/// </summary>
/// <param name="app">A class which allows configuration of the application's request pipeline.</param>
protected void SetupExceptionHandler(IApplicationBuilder app)
{
// As per https://docs.microsoft.com/en-us/aspnet/core/fundamentals/error-handling?view=aspnetcore-5.0#exception-handler-lambda
app.UseExceptionHandler(errorApp =>
{
var exceptionToHttpStatusCodeConverter = (ExceptionToHttpStatusCodeConverter)app.ApplicationServices.GetService(typeof(ExceptionToHttpStatusCodeConverter));
var exceptionToHttpInternalServerErrorConverter = (ExceptionToHttpInternalServerErrorConverter)app.ApplicationServices.GetService(typeof(ExceptionToHttpInternalServerErrorConverter));
errorApp.Run(async context =>
{
// Get the exception
var exceptionHandlerPathFeature = context.Features.Get <IExceptionHandlerPathFeature>();
Exception exception = exceptionHandlerPathFeature.Error;
if (exception != null)
{
context.Response.ContentType = jsonHttpContentType;
context.Response.StatusCode = (Int32)exceptionToHttpStatusCodeConverter.Convert(exception);
HttpInternalServerError httpInternalServerError = exceptionToHttpInternalServerErrorConverter.Convert(exception);
var serializer = new HttpInternalServerErrorJsonSerializer();
await context.Response.WriteAsync(serializer.Serialize(httpInternalServerError).ToString());
}
else
{
// Not sure if this situation can arise, but will leave this handler in while testing
throw new Exception("'exceptionHandlerPathFeature.Error' was null whilst handling exception.");
}
});
});
}
protected void SetUp()
{
testHttpInternalServerErrorJsonSerializer = new HttpInternalServerErrorJsonSerializer();
}
