public override Task WriteResponseBodyAsync(OutputFormatterWriteContext context, Encoding selectedEncoding)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (selectedEncoding == null)
{
throw new ArgumentNullException(nameof(selectedEncoding));
}
if (selectedEncoding != Encoding.UTF8)
{
throw Error.BadRequest($"FHIR supports UTF-8 encoding exclusively, not {selectedEncoding.WebName}");
}
context.HttpContext.AllowSynchronousIO();
using (TextWriter writer = context.WriterFactory(context.HttpContext.Response.Body, selectedEncoding))
using (XmlWriter xmlWriter = new XmlTextWriter(writer))
{
if (!(context.HttpContext.RequestServices.GetService(typeof(FhirXmlSerializer)) is FhirXmlSerializer serializer))
{
throw Error.Internal($"Missing required dependency '{nameof(FhirXmlSerializer)}'");
}
SummaryType summaryType = context.HttpContext.Request.RequestSummary();
if (typeof(FhirResponse).IsAssignableFrom(context.ObjectType))
{
FhirResponse response = context.Object as FhirResponse;
context.HttpContext.Response.AcquireHeaders(response);
context.HttpContext.Response.StatusCode = (int)response.StatusCode;
if (response.Resource != null)
{
serializer.Serialize(response.Resource, xmlWriter, summaryType);
}
}
else if (context.ObjectType == typeof(OperationOutcome) || typeof(Resource).IsAssignableFrom(context.ObjectType))
{
if (context.Object != null)
{
serializer.Serialize(context.Object as Resource, xmlWriter, summaryType);
}
}
else if (context.Object is ValidationProblemDetails validationProblems)
{
OperationOutcome outcome = new OperationOutcome();
outcome.AddValidationProblems(context.HttpContext.GetResourceType(), (HttpStatusCode)context.HttpContext.Response.StatusCode, validationProblems);
serializer.Serialize(outcome, xmlWriter, summaryType);
}
}
return(Task.CompletedTask);
}