Stream: implementers
Topic: fhirClient versioning
Trond Klakken (Sep 26 2019 at 08:22):
Hi! I'm trying to post R4 fhir objects to our Vonk server, and to get vonk to identify it as R4 object, I have to add ; fhirVersion=4.0 to the accept or contentType headers (https://www.hl7.org/fhir/http.html#version-parameter).
I was hoping the R4 FhirClient for C# (https://github.com/FirelyTeam/fhir-net-api) would do this, but after inspection, it does not set the headers.
Is there any way of getting the FhirClient to post fhirVersion without this ugly hack:
FhirClient.OnBeforeRequest += (sender, args) =>
{
args.RawRequest.Accept = args.RawRequest.Accept + "; fhirVersion=4.0";
args.RawRequest.ContentType = args.RawRequest.ContentType + "; fhirVersion=4.0";
};
Headers without hack:
{
"content-length": "450",
"user-agent": ".NET FhirClient for FHIR 4.0.0",
"prefer": "return=representation",
"accept": "application/fhir+xml; charset=utf-8",
"content-type": "application/fhir+xml; charset=utf-8"
}
Thanks!
Michele Mottini (Sep 26 2019 at 12:35):
Seems a bug in the server? Specifying the version is optional. Or is it an end point that supports multiple versions?
Michel Rutten (Sep 26 2019 at 12:38):
Correct, Vonk R4 release supports multi-version endpoints. Requests can specify version header (default STU3). Looks like we still need to integrate this logic into the FhirClient class.
Trond Klakken (Sep 26 2019 at 12:39):
Well, this works for now, just writing it a little bit prettier then above :)
Richard Ettema (Sep 26 2019 at 21:04):
Question - does the Vonk server support configuration to set the default FHIR version to R4?
Trond Klakken (Sep 27 2019 at 10:48):
@Richard Ettema not at this time. So you have to use multiple versions: http://docs.simplifier.net/vonk/features/multiversion.html
Mirjam Baltus (Sep 27 2019 at 11:11):
In our next release we will implement version specific endpoints, so you don't need to use the fhirVersion parameter anymore.
Trond Klakken (Sep 30 2019 at 08:48):
@Mirjam Baltus nice!
Ward Weistra (Sep 30 2019 at 09:46):
@Mirjam Baltus Just out of curiosity, will both options (one endpoint for both versions with version header AND version specific endpoints) be there in next release? Since I saw some people already implementing the FHIR version header.
Mirjam Baltus (Sep 30 2019 at 11:59):
Yes, we will keep supporting the current way of running Vonk on one endpoint and using the fhirVersion parameter too. As far as I know, both will work out of the box without having to configure your preference. We are also working on a configuration option to be able to set R4 as the default.
Last updated: Apr 12 2022 at 19:14 UTC
