method ← getMethod
when (method ≡ GET ∨ method ≡ HEAD)
- $ setHeader' "ETag" (printETag tag)
+ $ setHeader' "ETag"
+ $ A.fromAsciiBuilder
+ $ printETag tag
when (method ≡ POST)
$ abort InternalServerError []
(Just "Illegal computation of foundETag for POST request.")