tests/test-json.py

   1 # Copyright (c) 2009, 2010 Nicira, Inc.
   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 import getopt
  16 import sys
  17
  18 import ovs.json
  19
  20
  21 def print_json(json):
  22     if isinstance(json, str):
  23         print("error: %s" % json)
  24         return False
  25     else:
  26         ovs.json.to_stream(json, sys.stdout)
  27         sys.stdout.write("\n")
  28         return True
  29
  30
  31 def parse_multiple(stream):
  32     buf = stream.read(4096)
  33     ok = True
  34     parser = None
  35     while len(buf):
  36         if parser is None and buf[0] in " \t\r\n":
  37             buf = buf[1:]
  38         else:
  39             if parser is None:
  40                 parser = ovs.json.Parser()
  41             n = parser.feed(buf)
  42             buf = buf[n:]
  43             if len(buf):
  44                 if not print_json(parser.finish()):
  45                     ok = False
  46                 parser = None
  47         if len(buf) == 0:
  48             buf = stream.read(4096)
  49     if parser and not print_json(parser.finish()):
  50         ok = False
  51     return ok
  52
  53
  54 def main(argv):
  55     argv0 = argv[0]
  56
  57     try:
  58         options, args = getopt.gnu_getopt(argv[1:], '', ['multiple'])
  59     except getopt.GetoptError as geo:
  60         sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
  61         sys.exit(1)
  62
  63     multiple = False
  64     for key, value in options:
  65         if key == '--multiple':
  66             multiple = True
  67         else:
  68             sys.stderr.write("%s: unhandled option %s\n" % (argv0, key))
  69             sys.exit(1)
  70
  71     if len(args) != 1:
  72         sys.stderr.write("usage: %s [--multiple] INPUT.json\n" % argv0)
  73         sys.exit(1)
  74
  75     input_file = args[0]
  76     if input_file == "-":
  77         stream = sys.stdin
  78     else:
  79         stream = open(input_file, "r")
  80
  81     if multiple:
  82         ok = parse_multiple(stream)
  83     else:
  84         ok = print_json(ovs.json.from_stream(stream))
  85
  86     if not ok:
  87         sys.exit(1)
  88
  89
  90 if __name__ == '__main__':
  91     main(sys.argv)