conformance fetch failing on auth server default content type of application/xml about client-js

[vlad-ignatov]

We don't support XML but it should be possible to avoid this one. Can you please provide more details:

• What is the request
  • Does it have an accept header
  • What is the full URL requested
• What response are getting back
• What error are you getting

[ssmillard]

The error is in the when it is retrieving the conformance statement. I think adding an accept header will fix the problem.

Error: Uncaught (in promise): Error: Failed to fetch the conformance statement from "/metadata". SyntaxError: Unexpected token < in JSON at position 0
Error: Failed to fetch the conformance statement from "/metadata". SyntaxError: Unexpected token < in JSON at position 0
at fhir-client.js:10588

[vlad-ignatov]

Thanks @ssmillard! Can you send me the full URL of the conformance statement?
I am asking because I want to try different requests against it.

The client should be sending an accept header of application/json, but maybe that is not good enough for that server.

[ssmillard]

https://open-ic.epic.com/Argonaut/api/FHIR/Argonaut/metadata. I also had tested this in postman. no header returns xml. accept header of application/json returns json.

[vlad-ignatov]

Same here. The metadata endpoint returns JSON if accept header of application/json is sent.

However, the client should also be sending that header (assigned here). It seems to work for me. Are you using the latest version 2.0.7?

[ssmillard]

That was the issue. I was pinned to an earlier version. Sorry about that.

[msohaib308]

I am having same issue.

fhirClient is expecting JSON format but fhir server is returning XML
here is the fhir server URLs

https://staging-fhir.ecwcloud.com/fhir/r4/FFBJCD/metadata
https://staging-fhir.ecwcloud.com/fhir/r4/FFBJCD/.well-known/smart-configuration

Fhir server provide extra query parameter "_format=json" to get JSON response, this option is only for metadata
but they did not provide this option for "smart-configuration" end point

I don't know how to set this ("_format=json" ) configuration in fhirCLient Library.

https://staging-fhir.ecwcloud.com/fhir/r4/FFBJCD/metadata?_format=json

Is there any option to accept XML responses