Work around unicode issues by re-encoding properties as utf-8

recipe_modules/json/api.py

 # Copyright 2013 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 import functools
 import collections
 import contextlib
 import json
 
 from recipe_engine import recipe_api
@@ skipping 64 matching lines @@
     super(JsonApi, self).__init__(**kwargs)
     @functools.wraps(json.dumps)
     def dumps(*args, **kwargs):
       kwargs['sort_keys'] = True
       kwargs.setdefault('default', config_types.json_fixup)
       return json.dumps(*args, **kwargs)
     self.dumps = dumps
 
   @classmethod
   def loads(self, data, **kwargs):
-    def strip_unicode(obj):
-      if isinstance(obj, unicode):
-        return obj.encode('utf-8', 'replace')
-
-      if isinstance(obj, list):
-        return map(strip_unicode, obj)
-
-      if isinstance(obj, dict):
-        new_obj = type(obj)(
-            (strip_unicode(k), strip_unicode(v)) for k, v in obj.iteritems() )
-        return new_obj
-
-      return obj
-
-    return strip_unicode(json.loads(data, **kwargs))
+    return recipe_util.strip_unicode(json.loads(data, **kwargs))
 
   def is_serializable(self, obj):
     """Returns True if the object is JSON-serializable."""
     try:
       self.dumps(obj)
       return True
     except Exception:
       return False
 
   @recipe_util.returns_placeholder
@@ skipping 19 matching lines @@
         """
         import shutil
         import sys
         shutil.copy(sys.argv[1], sys.argv[2])
         """,
         args=[path,
               self.output(add_json_log=add_json_log, name=output_name)],
         add_python_log=False,
         **kwargs
     )