lib/nitcorn/restful.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Support module for the `nitrestful` tool and the `restful` annotation
  16 module restful is new_annotation(restful)
  17
  18 import nitcorn
  19 import json
  20
  21 # Action with `restful` methods
  22 class RestfulAction
  23         super Action
  24
  25         redef fun answer(request, truncated_uri) do return new HttpResponse(400)
  26
  27         # Service to deserialize arguments from JSON
  28         #
  29         # Accepts `nullable String` for convenience, but returns `null` when `val == null`.
  30         #
  31         # This method is called by the code generated by `nitrestful`.
  32         # It can be specialized to customize its behavior.
  33         protected fun deserialize_arg(val: nullable String): nullable Object
  34         do
  35                 if val == null then return null
  36
  37                 var deserializer = new JsonDeserializer(val)
  38                 var obj = deserializer.deserialize
  39
  40                 if deserializer.errors.not_empty then
  41                         print_error deserializer.errors.join("\n")
  42                         return null
  43                 end
  44
  45                 return obj
  46         end
  47 end