You'll want to configure the passthrough service to use "Standard Requests". This means REST requests will pass through a web server (IIS, Apache, etc) to get to IRIS:
https://docs.intersystems.com/irisforhealth20221/csp/docbook/DocBook.UI....

For TLS, you'll enable HTTPS on your web server.

And see this docs on enabling OAuth for web services:
https://docs.intersystems.com/irisforhealth20221/csp/docbook/DocBook.UI....

Yes, the GenericService will send an EnsLib.HTTP.GenericMessage object to your business process. The GenericMessage includes the headers and content of the inbound HTTP request. Your DTL can use these fields to transform to another format.

Similarly, the GenericOperation accepts the same GenericMessage type and uses the values in it to issue an HTTP request to the downstream system.

So all together, this allows you to create a REST web service and/or call out to external REST services using only the GUI.

https://docs.intersystems.com/irisforhealth20221/csp/docbook/DocBook.UI....

Here's a sample class to Base64 encode a stream:

Class Example.B64.Util Extends %RegisteredObject
{

/// Be cautious if changing CHUNKSIZE. Incorrect values could cause the resulting encoded data to be invalid.
/// It should always be a multiple of 57 and needs to be less than ~2.4MB when MAXSTRING is 3641144
Parameter CHUNKSIZE = 2097144;

ClassMethod B64EncodeStream(pStream As %Stream.Object, pAddCRLF As %Boolean = 0) As %Stream.Object
{
    set tEncodedStream=##class(%Stream.GlobalCharacter).%New()
    
    do pStream.Rewind()
    
    while ('pStream.AtEnd) {
        set tReadLen=..#CHUNKSIZE
        set tChunk=pStream.Read(.tReadLen)
        
        do tEncodedStream.Write($System.Encryption.Base64Encode(tChunk,'pAddCRLF))
        if (pAddCRLF && 'pStream.AtEnd) {
            do tEncodedStream.Write($c(13,10))
        }
    }
    
    do tEncodedStream.Rewind()
    
    quit tEncodedStream
}
}

If you can assume that the zip is always 5 digits and state is 2 digits, and if you can assume that the separator is always 1 character then you can do it by position:

set ZIP=$EXTRACT(x,*-4,*), STA=$EXTRACT(x,*-7,*-6), CTY=$EXTRACT(x,0,*-9)

Try removing the JsonArayOBJ argument from your call to SendFormDataURL.

set st = ..Adapter.SendFormDataURL(..Adapter.URL,.callResponsePat,"POST",HTTPRequestPat)

Can you give some more details on what's happening? Is there an error message?

Can you clarify a bit?

Do you want to use curl to make an HTTP request to a web service running in Ensemble? Or do you want Ensemble to launch curl to make an HTTP request to an external web service?

Is there already a defined structure for these globals/do these globals already exist? Or will you design something new?

Can you explain more about your use case? What is the purpose of copying these fields directly into globals? Is there another application that will read the values from the globals?

All persistent classes will save their data in globals automatically. It will save using the standard structures of the IRIS SQL layer.

If you have an existing global structure that you need to maintain you'll need to map your classes to your global structure. See this series of articles on how to do that.

I messed up the syntax:

&sql(select LIST(MessageName), LIST(Identifier) INTO :tMsgNmList, :tIdentList from GMECC_DocmanConnect_Tables.ParisConnecMessagetSettings)

How about this? Do the values returned in tMsgNmList and tIdentList match the values you're searching for?

&sql(select LIST(MessageName) INTO :tMsgNmList, LIST(Identifier) INTO :tIdentList from GMECC_DocmanConnect_Tables.ParisConnecMessagetSettings)

write SQLCODE, ":", tMsgNmList,":",tIdentList,!

If you try this what does it return?

&sql(select count(*) INTO :tCount from GMECC_DocmanConnect_Tables.ParisConnecMessagetSettings Where  MessageName = :tMessageName and Identifier = :tIdentifier)

write SQLCODE, ":", tCount,!