How to use expressions in HTTP Headers

[Steven_Aung]

Currently if we update any API key (discard old keys for any security reason), we have to update authorization http headers manually. It is a tedious and buggy process.

Ability to use template expression like below will make our life super efficient

[Marc_Dillon]

What does this mean then?

[Steven_Aung]

I was wondering the same thing.

I tested and the template expression doesn’t work. The literal text “<<[Test Column]>>” was sent to the server.

[Bellave_Jayaram]

Maybe try a Concat formula rather than a template syntax for the header?

[Steven_Aung · Accepted solution]

Thanks for the tip.

That works. So we don’t need <<>> brackets and concatenation. Just drop in the expression.
Another thing is AppSheet also check the format. So if I set [Printer Auth] in the formula without “Authorization:”, Appsheet will throw an error saying it’s missing “:”.

Good to know

[Steven_Aung]

Hi @Steve , the documentation in Invoking Webhooks from a Bot, Workflow Rule or Scheduled Report | AppSheet Help Center should include a simple example of using an expression in the HTTP header.

Thanks