Request and response validation by given malli rules.
The rule can be defined at route definition,
the schema can be defined with registry function.

Path definition example:

["/api/siege-machines/{mydomain/id}" {:hander     ws/handler-fn
                                        :action     mydomain.siege-machines/get-by-id
                                        :parameters {:path [:map [:mydomain/id int?]]}
                                        :responses  {200 {:body :mydomain/SiegeMachine}}}]

Registry example:
 (registry {:mydomain/SiegeMachine [:map
                                      [:id int?]
                                      [:name keyword?]
                                      [:range {:optional true} int?]
                                      [:created {:optional true} inst?]]
             :mydomain/Infantry [:map
                                   [:id int?]
                                   [:name keyword?]
                                   [:attack {:optional true} int?]]})

Solves environment and config variables

Cookie parser

Data source builder

Provides the default handler function

Cryptography helper for creating, and resolving passwords.
Supported algorithms are bcrypr, pbkdf2, and scrypt.
The required algorithm should be in (-> state :deps :auth :hash-algorithm)

Collection of useful interceptors

Muuntaja interceptor encoder/decode..

Interceptor executor.
Collects and executes interceptors and the given action in between.

To wrap any kind of middlewares and interceptors to xiana flow.

Integrates tiny-RBAC library to the xiana flow

Do the routing, and inject request data to the xiana state

The default not found and action functions

Xiana's session management

Lifecycle management of the webserver