In the latest happs (darcs pulled, updated head is 0.9.1 iirc), I am experimenting with the example file in src/HAppS/Examples/HTTP1.hs.
I would like to combine state with io. Eventually io will mean stuff like
reading from a database, but for now I'm just reading a file.
The example file HTTP1.hs has an example that demonstrates state with
macid.
I added an example that allows you to execute arbitrary io.
I tried, but was unable to, add a handler that combines state and io.
, h ["iohandler"] GET $ ioReadFileHandler
, h ["statehandler"] GET $ stateHandler
--, h ["ioandstatehandler"] GET $ ioAndStateHandler
.....
-- displays contents of HAPPS.hs in current directory
ioReadFileHandler = iohandler $ readFile "./HAppS.hs"
-- displays incremented state counter
stateHandler = ok $ \() () ->
modify (+(1::Int)) >> get >>= respond . show
-- should combine effect of iohandler with statehandler
-- specifically, should display contents of HAppS.hs, and under that an
incremented state handler
-- is this possible
ioAndStateHandler = undefined undefined
Is mixing state and io possible with HAppS? If so, an example showing how
to do it would be extremely helpful.
best, thomas.
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