Alex Black <[email protected]> writes:
> Hi, I'd like to rewrite a url like this:
>
> /manufacturer/product
>
> e.g.
>
> LiftRules.statelessRewrite.append( {
> case RewriteRequest(
> ParsePath( manufacturerName :: productName :: Nil, _, _,_), _,
> _) =>
>
> RewriteResponse("productView" :: Nil)
> })
>
> But, I'd like to the ParsePath case to not 'catch' for non-existant
> manufacturers, and non-existant products by the manufacturer.
>
> So, I might do this:
>
> LiftRules.statelessRewrite.append( {
> case RewriteRequest(
> ParsePath( Manufacturer(manufacturer) :: Product(product) ::
> Nil, _, _,_), _, _) =>
>
> RewriteResponse("productView" :: Nil)
> })
>
> Where Manufacturer and Product objects provide an extractor which does
> a lookup.
>
> However, the product lookup depends on the manufacturer.. is there a
> way to handle that?
>
> ideas:
> 1. use an if guard
>
> case RewriteRequest(
> ParsePath( Manufacturer(manufacturer) :: productName :: Nil,
> _, _,_), _, _) if manufacturer.contains(productName) =>
> val product = manufacturer.getProduct(productName)
>
> sucks because it looks up the product twice.
>
> 2. some time of nested case?
>
> case RewriteRequest(
> ParsePath( Manufacturer(manufacturer) :: Product(manufacturer,
> product) :: Nil, _, _,_), _, _) =>
>
> obviously doesn't work..
>
> any suggestions welcome, thanks!
You could write you own extractor. Here's an example from production
code :-)
override val rewrite: LocRewrite = Full(NamedPF(name) {
case RewriteRequest(ParamsExtractor(account,orgUnit) , _, _) =>
(RewriteResponse(path), Full(account, orgUnit))
})
object ParamsExtractor {
def unapply(pp:ParsePath): Option[(Account, OrgUnit)] = {
val result:Box[(Account, OrgUnit)] = if (pp.wholePath.startsWith(path)
&& pp.wholePath.length == (path.length + 2)) {
val res = for {decrypted1 <-
FleetZoneRules.decrypt(pp.wholePath(path.length))
account <-
urlAccount.is.choice(Full(_))(Account.find(decrypted1))
decrypted2 <- FleetZoneRules.decrypt(pp.wholePath.last)
orgUnit <-
urlOrgUnit.is.choice(Full(_))(OrgUnit.find(decrypted2)) if (orgUnit.account ==
account)} yield {
urlAccount(Full(account))
urlOrgUnit(Full(orgUnit))
(account, orgUnit)
}
log.debug("Decoded URL: %s=%s".format(pp,res))
res
}
else
None
result
}
}
/Jeppe
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