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 = $"{res.StatusCode} encountered for the URL {httpRequest.RequestUri.AbsoluteUri}";
var errorResource =
(fhirResponse.Resource.ResourceType != ResourceType.OperationOutcome) ?
OperationOutcomeFactory.CreateGenericError(diagnostics) :
fhirResponse.GetResource <OperationOutcome>();
throw new HttpFhirException("Request resulted in an error.", errorResource, res.StatusCode);
}
}
}
return(await SystemTasks.Task.Run(() => fhirResponse));
}
public async Task <CommandResponse> ForwardRequest(CommandRequest request)
{
//var internalTraceId = Guid.NewGuid();
var handler = _httpRequestHelper.GetClientHandler(request);
var response = new CommandResponse();
using (var client = new HttpClient(handler))
{
var httpRequest = _httpRequestHelper.GetRequestMessage(request);
//string responseMessage = null;
//LogRequest(httpRequest, request.Resource, internalTraceId);
using (HttpResponseMessage res = await client.SendAsync(httpRequest, HttpCompletionOption.ResponseHeadersRead))
using (HttpContent content = res.Content)
{
try
{
//TODO: upgrade to core 2.2 and use IHttpClientFactory for delegate handling
var data = content.ReadAsByteArrayAsync().Result;
//responseMessage = Encoding.UTF8.GetString(data, 0, data.Length);
if (res.Headers.TransferEncodingChunked == true &&
res.Headers.TransferEncoding.Count == 1)
{
res.Headers.TransferEncoding.Clear();
}
foreach (var resHeader in res.Headers)
{
response.Headers.Add(resHeader.Key, resHeader.Value);
}
var contentLength = content.Headers.ContentLength;
foreach (var resHeader in content.Headers)
{
response.Headers.Add(resHeader.Key, resHeader.Value);
}
response.Content = data;
response.StatusCode = (int)res.StatusCode;
}
catch (Exception e)
{
throw new HttpRequestException($"Parsing response from {request.ForwardUrl} failed.");
}
finally
{
//LogResponse(res.Headers, (int)res.StatusCode, responseMessage, internalTraceId);
}
}
}
return(await Task.Run(() => response));
}