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 from __future__ import print_function
  16
  17 import codecs
  18 import getopt
  19 import sys
  20
  21 import ovs.json
  22
  23 import six
  24
  25
  26 def print_json(json):
  27     if isinstance(json, six.string_types):
  28         print("error: %s" % json)
  29         return False
  30     else:
  31         ovs.json.to_stream(json, sys.stdout)
  32         sys.stdout.write("\n")
  33         return True
  34
  35
  36 def parse_multiple(stream):
  37     buf = stream.read(4096)
  38     ok = True
  39     parser = None
  40     while len(buf):
  41         if parser is None and buf[0] in " \t\r\n":
  42             buf = buf[1:]
  43         else:
  44             if parser is None:
  45                 parser = ovs.json.Parser()
  46             n = parser.feed(buf)
  47             buf = buf[n:]
  48             if len(buf):
  49                 if not print_json(parser.finish()):
  50                     ok = False
  51                 parser = None
  52         if len(buf) == 0:
  53             buf = stream.read(4096)
  54     if parser and not print_json(parser.finish()):
  55         ok = False
  56     return ok
  57
  58
  59 def main(argv):
  60     argv0 = argv[0]
  61
  62     # When this is used with Python 3, the program produces no output.
  63     if six.PY2:
  64         # Make stdout and stderr UTF-8, even if they are redirected to a file.
  65         sys.stdout = codecs.getwriter("utf-8")(sys.stdout)
  66         sys.stderr = codecs.getwriter("utf-8")(sys.stderr)
  67
  68     try:
  69         options, args = getopt.gnu_getopt(argv[1:], '', ['multiple'])
  70     except getopt.GetoptError as geo:
  71         sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
  72         sys.exit(1)
  73
  74     multiple = False
  75     for key, value in options:
  76         if key == '--multiple':
  77             multiple = True
  78         else:
  79             sys.stderr.write("%s: unhandled option %s\n" % (argv0, key))
  80             sys.exit(1)
  81
  82     if len(args) != 1:
  83         sys.stderr.write("usage: %s [--multiple] INPUT.json\n" % argv0)
  84         sys.exit(1)
  85
  86     input_file = args[0]
  87     if input_file == "-":
  88         stream = sys.stdin
  89     else:
  90         stream = open(input_file, "r")
  91
  92     if multiple:
  93         ok = parse_multiple(stream)
  94     else:
  95         ok = print_json(ovs.json.from_stream(stream))
  96
  97     if not ok:
  98         sys.exit(1)
  99
 100
 101 if __name__ == '__main__':
 102     main(sys.argv)