public ProblemDetailsExceptionHandlerMiddleware(RequestDelegate next, IOptions <ProblemDetailsExceptionHandlerOptions> options, ILogger <ProblemDetailsExceptionHandlerMiddleware> logger)
{
_next = next;
_options = options.Value;
_logger = logger;
_clearCacheHeadersDelegate = OnResponseStarting;
}
public static IApplicationBuilder UseProblemDetailsExceptionHandler(this IApplicationBuilder app, Action <ProblemDetailsExceptionHandlerOptions> configureOptions = null)
{
var options = new ProblemDetailsExceptionHandlerOptions();
if (configureOptions != null)
{
configureOptions(options);
}
return(app.UseMiddleware <ProblemDetailsExceptionHandlerMiddleware>(Options.Create(options)));
}
public static IApplicationBuilder UseProblemDetailsExceptionHandler(this IApplicationBuilder app, Action <ProblemDetailsExceptionHandlerOptions> configureOptions = null)
{
var options = new ProblemDetailsExceptionHandlerOptions();
if (configureOptions != null)
{
configureOptions(options);
}
var loggerFactory = app.ApplicationServices.GetRequiredService <ILoggerFactory>();
//UseExceptionHandler logs error automatically
return(app.UseExceptionHandler(HandleException(loggerFactory, options)));
}
public static IApplicationBuilder UseProblemDetailsExceptionHandler2(this IApplicationBuilder app, Action <ProblemDetailsExceptionHandlerOptions> configureOptions = null)
{
var options = new ProblemDetailsExceptionHandlerOptions();
if (configureOptions != null)
{
configureOptions(options);
}
var loggerFactory = app.ApplicationServices.GetRequiredService <ILoggerFactory>();
//UseExceptionHandler logs error automatically, Do we want to do this if we are handling them?
//If a path is set the request is sent back down the pipeline again.
//https://docs.microsoft.com/en-us/aspnet/core/web-api/handle-errors?view=aspnetcore-5.0
return(app.UseExceptionHandler(HandleException(loggerFactory, options)));
}
public static Action <IApplicationBuilder> HandleException(ILoggerFactory loggerFactory, ProblemDetailsExceptionHandlerOptions exceptionOptions)
{
return(appBuilder =>
{
appBuilder.Run(async context =>
{
var exceptionHandlerFeature = context.Features.Get <IExceptionHandlerFeature>();
var exception = exceptionHandlerFeature?.Error;
if (!exceptionOptions.HandleException(context, exceptionOptions, exception))
{
return;
}
var logger = loggerFactory.CreateLogger <ExceptionHandlerMiddleware>();
bool showExceptionDetails = false;
if (exception != null && (exceptionOptions.ShowExceptionDetails || exceptionOptions.ShowExceptionDetailsDelegate(context, exception)))
{
showExceptionDetails = true;
}
if (exception != null && exception is ProblemDetailsException ex)
{
// The user has already provided a valid problem details object.
await context.WriteProblemDetailsResultAsync(ex.ProblemDetails).ConfigureAwait(false);
return;
}
var types = exception == null ? new[] { typeof(Exception) } : exception.GetType().GetTypeAndInterfaceHierarchy();
foreach (var type in types)
{
if (exceptionOptions.ProblemDetailFactories.ContainsKey(type))
{
var factory = exceptionOptions.ProblemDetailFactories[type];
var problemDetails = factory(context, logger, exception, showExceptionDetails);
if (problemDetails != null)
{
await context.WriteProblemDetailsResultAsync(problemDetails).ConfigureAwait(false);
}
return;
}
}
if (exceptionOptions.DefaultProblemDetailFactory != null)
{
var problemDetails = exceptionOptions.DefaultProblemDetailFactory(context, logger, exception, showExceptionDetails);
if (problemDetails != null)
{
await context.WriteProblemDetailsResultAsync(problemDetails).ConfigureAwait(false);
}
return;
}
});
});
}
