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When I specify an HTTPCaller with a defined header, then everything works as desired. However, as soon as I want to enter a conditional value (the same values that work alone), I get an error message:

 

This FME edition does not recognize the `' function. Please ensure that the current platform supports this function, the function name is spelled correctly, and that you have installed all required plug-ins.

 

Unfortunately it's the same behavior when I define conditional User Parameters and use them as HTTPCaller headers.

 

Is there a way you can use conditional "header" values in a HTTPCaller or is this a bug?

 

Best regards

A possible workaround would be to do the conditional in an AttributeManager before the HTTPCaller, and then only reference the resulting attribute there.

Tahnk you for your answer!

I already tried this and this works. However, since I have several HTTPCallers my Workflow looks a bit chaotic when I work with "VariableSetter" and "VariableRetriever" or as you suggested with an "AttributeManager" (I use several HTTPCaller in different steps in my workflow).

 

I wish I could define the conditional value as a user parameter and use it in all my HTTPCaller. But as I stated, unfortunately I always get the above error message...

Which version is this? Have you tried with 2023.1 as well? If yes, consider reporting it as a a possible bug.

Which version is this? Have you tried with 2023.1 as well? If yes, consider reporting it as a a possible bug.

It's still version 2022.2...

It's still version 2022.2...

I just tested with 2023.1, it's the same issue there. I've opened a support ticket with Safe and ask that they add their feedback here. If you want to contact Safe about it, please reference ticket id C694358.

It's still version 2022.2...

@david_r​  thank you for testing this also with 2023.1! It's a quite strange behaviour in my opinion...

It's still version 2022.2...

Just got the following reply from Safe regarding this issue:

We're pleased to let you know that a recent update to FME has implemented the suggestions/resolved the issues reported as:

 

             ÂC694358] HTTPCaller, using conditionals in the header section fails

                           Issue Summary: HTTPCaller fails when using a conditional header value

  

You will find the update in our latest FME 2024.0 beta (b24122+): safe.com/beta We expect this change to be included in the official release of FME 2024.0

It's still version 2022.2...

Thank you for the update!

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