Typo3 Typoscript additionalHeaders header location using variable - typo3

Question

I try to redirect a link which is coming, but before part of the link should be replaced.
tmp.getSlug = TEXT
tmp.getSlug.data = getIndpEnv : TYPO3_REQUEST_URL
tmp.getSlug.replacement {
10 {
search = myLinkPart
replace = myNewLinkPart
}
}
config.additionalHeaders.10 {
header = Location: {tmp.getSlug}
}
So from: www.myUrl.de/test/myLinkPart/test2/
To: www.myUrl.de/test/myNewLinkPart/test2/
It must be inside Typoscript because of other conditions.
Does anybody has an idea?

Answer 1

you are mixing different objects in a non functional way.
First you define tmp.getSlug as a typoscript object. Then you try to use it as a data variable.
Additional everything beyond tmp. is not available at rendering time. (it just is available when the typoscript is scanned.)
If you want to use the evaluation of tmp.getSlug you need to assign it to a permanent object and then store it in a register so you can access it afterwards.
Additional you need a flexible object to compose the Location header, which by default just contains a string.
Either a text object where you can use data (which must be evaluated and stored in a register before) or a COA to compose the static and the dynamic string.
This might be a solution:
tmp.getSlug = TEXT
tmp.getSlug.data = getIndpEnv : TYPO3_REQUEST_URL
tmp.getSlug.replacement {
10 {
search = myLinkPart
replace = myNewLinkPart
}
}
config.additionalHeaders.10 {
header.cObject = COA
header.cObject {
10 = TEXT
10.value = Location:
20 < tmp.getSlug
}
}