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title2) Endpoint - the URL where the resource is found

The URL defines where the client can access the desired resources - for example the Patient resource.  

Code Block
url='http://hapi.fhir.org/baseR4/Patient'

For GET requests, the URL may also contain any necessary query parameters like the id of the patient you are searching for.  

When using net.http.get{}, the parameters argument takes in a table of key-value pairs and automatically formats the query string.

Code Block
httpshttp://apihapi.examplefhir.comorg/baseR4/resourcePatient?param1id=value112324&param2name=value2John
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title3) Header - the metadata providing information about the request

The header includes metadata requirements defined by the API to provide information about the request.

Code Block
headers= {
  ['Content-Type'] = 'application/fhir+json',
  ['Authorization'] = 'Bearer '..token
}

This can contain information such as: 

  • Connection and content types 

  • Authentication information like credentials or an access token

  • MIME types

  • Entity tags (ETAGS)

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