private async SystemTasks.Task <FhirResponse> Request(CommandRequest request)
{
var internalTraceId = Guid.NewGuid();
var fhirResponse = new FhirResponse();
var handler = _httpRequestHelper.GetClientHandler(request);
using (var client = new HttpClient(handler))
{
var httpRequest = _httpRequestHelper.GetRequestMessage(request);
//LogRequest(httpRequest, request.Resource, internalTraceId);
using (HttpResponseMessage res = await client.SendAsync(httpRequest, HttpCompletionOption.ResponseHeadersRead))
using (HttpContent content = res.Content)
{
//res.EnsureSuccessStatusCode(); //will throw a HttpRequestException to catch in future
var mediaType = content.Headers.ContentType?.MediaType?.ToLowerInvariant();
if (res.Headers?.Location != null)
{
fhirResponse.ResponseLocation = res.Headers.Location;
}
//TODO: upgrade to core 2.2 and use IHttpClientFactory
// for delegate handling and retries policy
if (!string.IsNullOrEmpty(mediaType) && mediaType.Contains("fhir"))
{
fhirResponse = await ParseResource(content, request, fhirResponse);
}
else
{
fhirResponse = await ParseBinary(content, request, fhirResponse);
}
//get content from fhirResponse
//string responseMessage = null;
//LogResponse(res.Headers, (int)res.StatusCode, responseMessage, internalTraceId);
if (!res.IsSuccessStatusCode)
{
var diagnostics = $"{res.StatusCode} encountered for the URL {httpRequest.RequestUri.AbsoluteUri}";
var errorResource =
(fhirResponse.Resource.ResourceType != ResourceType.OperationOutcome) ?
OperationOutcomeFactory.CreateGenericError(diagnostics) :
fhirResponse.GetResource <OperationOutcome>();
throw new HttpFhirException("Request resulted in an error.", errorResource, res.StatusCode);
}
}
}
return(await SystemTasks.Task.Run(() => fhirResponse));
}
private CommandRequest BuildRequest(string asid, string jwtOrgCode, string providerOds)
{
var consumer = _sdsService.GetFor(asid);
var provider = _sdsService.GetFor(providerOds, FhirConstants.ReadBinaryInteractionId);
if (consumer == null)
{
throw new HttpFhirException("Local system not registered with SDS.", OperationOutcomeFactory.CreateGenericError($"Unknown ASID {asid}"), HttpStatusCode.BadRequest);
}
if (provider == null)
{
throw new HttpFhirException("External system not registered with SDS.", OperationOutcomeFactory.CreateGenericError($"Unknown ODS code {providerOds}"), HttpStatusCode.BadRequest);
}
var command = new CommandRequest
{
BaseUrl = $"{(_spineSettings.SspUseSecure ? _spineSettings.SspSecureServerUrl : _spineSettings.SspServerUrl)}",
ResourceType = ResourceType.Binary,
Method = HttpMethod.Get,
UseSecure = _spineSettings.SspUseSecure,
ClientThumbprint = consumer?.Thumbprint,
ServerThumbprint = _spineSettings.SspSslThumbprint,
RegenerateUrl = false
};
var jwt = JwtFactory.Generate(JwtScopes.Read, jwtOrgCode, "fakeRoleId", asid, command.FullUrl.AbsoluteUri, SystemUrlBase, "*");
command.Headers.Add(HeaderNames.Authorization, $"Bearer {jwt}");
command.Headers.Add(FhirConstants.HeaderSspFrom, consumer?.Asid); // GET consumer ASID
command.Headers.Add(FhirConstants.HeaderSspTo, provider?.Asid); // GET provider asid
command.Headers.Add(FhirConstants.HeaderSspInterationId, FhirConstants.ReadBinaryInteractionId);
command.Headers.Add(FhirConstants.HeaderSspTraceId, Guid.NewGuid().ToString());
return(command);
}
