FHIR R4 & HL7 v2 interoperability

// Illustrative request — dummy data
const res = await fetch('https://api.example-hospital.org/fhir/Patient/1042', {
  headers: {
    Authorization: `Bearer ${process.env.TOKEN}`,
    Accept: 'application/fhir+json',
  },
});
const patient = await res.json();
console.log(patient.name[0].family);

// Java 17 · java.net.http — dummy data
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://api.example-hospital.org/fhir/Patient/1042"))
    .header("Authorization", "Bearer " + System.getenv("TOKEN"))
    .header("Accept", "application/fhir+json")
    .GET()
    .build();

HttpResponse<String> response =
    client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());

// React — dummy data
function PatientName({ id }) {
  const [patient, setPatient] = useState(null);

  useEffect(() => {
    fetch(`/api/fhir/Patient/${id}`, { headers: { Accept: 'application/fhir+json' } })
      .then((r) => r.json())
      .then(setPatient);
  }, [id]);

  return patient ? <h3>{patient.name[0].family}</h3> : <p>Loading…</p>;
}

<?php
$ch = curl_init('https://api.example-hospital.org/fhir/Patient/1042');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => ["Authorization: Bearer $token", 'Accept: application/fhir+json'],
]);
$patient = json_decode(curl_exec($ch), true);

# Illustrative request — dummy data
curl https://api.example-hospital.org/fhir/Patient/1042 \
  -H "Authorization: Bearer $TOKEN" \
  -H "Accept: application/fhir+json"

{
  "resourceType": "Patient",
  "id": "1042",
  "identifier": [{ "system": "urn:hospital:mrn", "value": "MRN-000123" }],
  "name": [{ "family": "Doe", "given": ["Jane"] }],
  "gender": "female",
  "birthDate": "1990-04-12"
}