snaplet-rest alternatives and similar packages
Based on the "snaplet" category.
Alternatively, view snaplet-rest alternatives based on common mentions on social networks and blogs.
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snaplet-hslogger
An HSLogger snaplet for snap (snap's logging facilities are poor and not configurable). -
InfluxDB - Power Real-Time Data Analytics at Scale
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README
REST resources for the Snap framework.
import Data.CaseInsensitive (CI)
import Snap.Snaplet.Rest
As an example, let's translate the following datatype into a resource.
data User = User { user :: Username, name :: String, age :: Int }
deriveJSON ''User
type Username = CI String
We need a type to represent changes to the resource. This 'partial' type indicates what properties to change: either the name, the age, or both.
data UserPart = UserPart { partName :: Maybe String, partAge :: Mabe Int }
This type also acts as a search mechanism: we can search by names, ages, or
both. We can use either a username or a UserPart search to find users, and
define a function to convert URL query string parameters to this search.
type UserId = Either Username UserPart
userIdFromParams :: Params -> Maybe UserId
Now we have the pieces required to define our CRUD behaviour.
createUser :: User -> AppHandler ()
readUser :: UserId -> AppHandler [User]
updateUser :: UserId -> UserPart -> AppHandler Bool
deleteUser :: UserId -> AppHandler Bool
Because we derived JSON instances, we can add JSON as a media format without having to define these manually. Once the behaviour is attached to the resource, it can be served in the handler.
serveUser :: AppHandler ()
serveUser = serveResource $ resource
& addMedia jsonInstances
& setCreate createUser
& setRead readUser
& setUpdate updateUser
& setDelete deleteUser
& setFromParams userIdFromParams