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· Jun 15, 2017

REST call with String parameter with control characters

#REST API #Caché

I am trying to design a RESTful service that takes a string (with control characters). Does something with that in the logic on the server, then returns a string, which may also have control characters.

 

Basically the string is a pharmacy claim in a delimited format that uses control characters for those delimiters. The logic on the server will pull the entire claim apart and process it.

 

I was thinking that a GET method could be uses but I'm used to sending content in JSON format and wondered what other normal RESTful ways there were to do this.

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Jeffrey Semmens · Jun 15, 2017

So if I am calling this service from an Ensemble operation that looks something like this:

Method getPatient(pRequest As RESTDemo.REST.ClaimRequest, Output pResponse As EnsLib.REST.GenericMessage) As %Status
{
  try {
    // Prepare and log the call
    // Append the claim to the URL
    Set tURL=..Adapter.URL_"/claims/"_pRequest.claimBlob    
       
    // Execute the call
    set tSC=..Adapter.GetURL(tURL,.tHttpResponse)
       
    #; Suppress HTTP status errors and just pass back the status, headers and body
    If $$$ISERR(tSC)&&'$$$StatusEquals(tSC,$$$EnsErrHTTPStatus) { Quit }
       
    // Return the response      
    Set tSC=$$$OK
    If $IsObject(tHttpResponse.Data) {
      Set tStream=tHttpResponse.Data
    } Else {
      Set tStream=##class(%GlobalBinaryStream).%New()
      Set tSC=tStream.Write(tHttpResponse.Data)  Quit:$$$ISERR(tSC)
    }
    Set pResponse=##class(EnsLib.REST.GenericMessage).%New(tStream,,tHttpResponse)
    Do pResponse.HTTPHeaders.SetAt(tHttpResponse.StatusLine,"StatusLine")
  } catch {
    Set tSC=$$$SystemError
  }
  Quit tSC
}

Would I just call $system.Encryption.Base64Encode() on the claimBlob property?

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