lib/msgpack/msgpack_to_json.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 # Convert MessagePack format to JSON
  16 module msgpack_to_json
  17
  18 import msgpack::read
  19 import json
  20
  21 if args.has("-h") then
  22         print "Usage: nit msgpack::msgpack_to_json [source_file.msgpack]"
  23         print "Convert MessagePack format to JSON. Read from stdin if no source_file is given."
  24         exit 0
  25 end
  26
  27 var reader = if args.length >= 1 then
  28                 new FileReader.open(args.first)
  29         else stdin
  30
  31 while reader.last_error == null and not reader.eof do
  32         var deserialized = reader.read_msgpack
  33
  34         if deserialized != null then
  35                 print deserialized.serialize_to_json(plain=true, pretty=true)
  36         else
  37                 print "null"
  38         end
  39 end