/// <summary>
/// Required method for a web api global exception handler
/// </summary>
public override Task HandleAsync(ExceptionHandlerContext context, CancellationToken cancellationToken)
{
// The stock web api global handler throws an exception in this case;
// duplicating that logic.
if (context == null)
{
throw new ArgumentNullException("context");
}
// verify this exception should be handled at all; exit if not
if (!ShouldHandle(context))
{
return(Task.FromResult(0));
}
// convert the exception into an RFC7807Exception if required, then create an IHttpActionResult from it
var ex = context.Exception as RFC7807Exception;
if (ex == null)
{
ex = new RFC7807Exception(context.Exception, context.Request.RequestUri);
}
context.Result = context.Request.CreateRFC7807ProblemActionResult(ex.ProblemDetail);
return(Task.FromResult(0));
}
/// <summary>
/// Create an HttpResponseMessage given an RFC7807ProblemDetail instance
/// </summary>
public static HttpResponseMessage CreateRFC7807ProblemResponse(this HttpRequestMessage request,
RFC7807ProblemDetail detail)
{
var media = RFC7807Media.GetRFC7807ContentTypeForRequest(request);
var formatter = RFC7807Media.GetMediaTypeFormatterForResponseType(
request.GetConfiguration(), media);
var exception = new RFC7807Exception(detail);
return(request.CreateResponse((HttpStatusCode)exception.ProblemDetail.Status, detail, formatter, media));
}
/// <summary>
/// Required method for exception filters
/// </summary>
public override Task OnExceptionAsync(HttpActionExecutedContext context, CancellationToken cancellationToken)
{
var ex = context.Exception as RFC7807Exception;
if (ex == null)
{
ex = new RFC7807Exception(context.Exception, context.Request.RequestUri);
}
context.Response = context.Request.CreateRFC7807ProblemResponse(ex.ProblemDetail);
return(Task.FromResult(0));
}
/// <summary>
/// Create an IHttpActionResult given an RFC7807ProblemDetail instance
/// </summary>
public static IHttpActionResult CreateRFC7807ProblemActionResult(this HttpRequestMessage request,
RFC7807ProblemDetail detail)
{
var media = RFC7807Media.GetRFC7807ContentTypeForRequest(request);
var formatter = RFC7807Media.GetMediaTypeFormatterForResponseType(
request.GetConfiguration(), media);
var exception = new RFC7807Exception(detail);
return(new FormattedContentResult <RFC7807ProblemDetail>(
(HttpStatusCode)exception.ProblemDetail.Status,
detail, formatter, new MediaTypeHeaderValue(media), request));
}
