add encoding and propagate accordingly for calls

stix2/datastore/filesystem.py

@@ -282,19 +282,21 @@ def _get_matching_dir_entries(parent_dir, auth_set, st_mode_test=None, ext=""):
     return results
 
 
-def _check_object_from_file(query, filepath, allow_custom, version):
+def _check_object_from_file(query, filepath, allow_custom, version, encoding):
     """
     Read a STIX object from the given file, and check it against the given
     filters.
 
     Args:
         query: Iterable of filters
-        filepath: Path to file to read
-        allow_custom: Whether to allow custom properties as well unknown
+        filepath (str): Path to file to read
+        allow_custom (bool): Whether to allow custom properties as well unknown
         custom objects.
         version (str): If present, it forces the parser to use the version
             provided. Otherwise, the library will make the best effort based
             on checking the "spec_version" property.
+        encoding (str): The encoding to use when reading a file from the
+            filesystem.
 
     Returns:
         The (parsed) STIX object, if the object passes the filters.  If
@@ -308,7 +310,7 @@ def _check_object_from_file(query, filepath, allow_custom, version):
 
     """
     try:
-        with io.open(filepath, "r") as f:
+        with io.open(filepath, "r", encoding=encoding) as f:
             stix_json = json.load(f)
     except ValueError:  # not a JSON file
         raise TypeError(
@@ -327,7 +329,7 @@ def _check_object_from_file(query, filepath, allow_custom, version):
     return result
 
 
-def _search_versioned(query, type_path, auth_ids, allow_custom, version):
+def _search_versioned(query, type_path, auth_ids, allow_custom, version, encoding):
     """
     Searches the given directory, which contains data for STIX objects of a
     particular versioned type (i.e. not markings), and return any which match
@@ -337,11 +339,13 @@ def _search_versioned(query, type_path, auth_ids, allow_custom, version):
         query: The query to match against
         type_path: The directory with type-specific STIX object files
         auth_ids: Search optimization based on object ID
-        allow_custom: Whether to allow custom properties as well unknown
+        allow_custom (bool): Whether to allow custom properties as well unknown
             custom objects.
         version (str): If present, it forces the parser to use the version
             provided. Otherwise, the library will make the best effort based
             on checking the "spec_version" property.
+        encoding (str): The encoding to use when reading a file from the
+            filesystem.
 
     Returns:
         A list of all matching objects
@@ -375,6 +379,7 @@ def _search_versioned(query, type_path, auth_ids, allow_custom, version):
                 stix_obj = _check_object_from_file(
                     query, version_path,
                     allow_custom, version,
+                    encoding,
                 )
                 if stix_obj:
                     results.append(stix_obj)
@@ -395,7 +400,7 @@ def _search_versioned(query, type_path, auth_ids, allow_custom, version):
         try:
             stix_obj = _check_object_from_file(
                 query, id_path, allow_custom,
-                version,
+                version, encoding,
             )
             if stix_obj:
                 results.append(stix_obj)
@@ -407,7 +412,7 @@ def _search_versioned(query, type_path, auth_ids, allow_custom, version):
     return results
 
 
-def _search_markings(query, markings_path, auth_ids, allow_custom, version):
+def _search_markings(query, markings_path, auth_ids, allow_custom, version, encoding):
     """
     Searches the given directory, which contains markings data, and return any
     which match the query.
@@ -416,11 +421,13 @@ def _search_markings(query, markings_path, auth_ids, allow_custom, version):
         query: The query to match against
         markings_path: The directory with STIX markings files
         auth_ids: Search optimization based on object ID
-        allow_custom: Whether to allow custom properties as well unknown
+        allow_custom (bool): Whether to allow custom properties as well unknown
             custom objects.
         version (str): If present, it forces the parser to use the version
             provided. Otherwise, the library will make the best effort based
             on checking the "spec_version" property.
+        encoding (str): The encoding to use when reading a file from the
+            filesystem.
 
     Returns:
         A list of all matching objects
@@ -443,7 +450,7 @@ def _search_markings(query, markings_path, auth_ids, allow_custom, version):
         try:
             stix_obj = _check_object_from_file(
                 query, id_path, allow_custom,
-                version,
+                version, encoding,
             )
             if stix_obj:
                 results.append(stix_obj)
@@ -470,13 +477,15 @@ class FileSystemStore(DataStoreMixin):
             will be applied to both FileSystemSource and FileSystemSink.
         bundlify (bool): whether to wrap objects in bundles when saving
             them. Default: False.
+        encoding (str): The encoding to use when reading a file from the
+            filesystem.
 
     Attributes:
         source (FileSystemSource): FileSystemSource
         sink (FileSystemSink): FileSystemSink
 
     """
-    def __init__(self, stix_dir, allow_custom=None, bundlify=False):
+    def __init__(self, stix_dir, allow_custom=None, bundlify=False, encoding='utf-8'):
         if allow_custom is None:
             allow_custom_source = True
             allow_custom_sink = False
@@ -484,7 +493,7 @@ class FileSystemStore(DataStoreMixin):
             allow_custom_sink = allow_custom_source = allow_custom
 
         super(FileSystemStore, self).__init__(
-            source=FileSystemSource(stix_dir=stix_dir, allow_custom=allow_custom_source),
+            source=FileSystemSource(stix_dir=stix_dir, allow_custom=allow_custom_source, encoding=encoding),
             sink=FileSystemSink(stix_dir=stix_dir, allow_custom=allow_custom_sink, bundlify=bundlify),
         )
 
@@ -603,12 +612,15 @@ class FileSystemSource(DataSource):
         stix_dir (str): path to directory of STIX objects
         allow_custom (bool): Whether to allow custom STIX content to be
             added to the FileSystemSink. Default: True
+        encoding (str): The encoding to use when reading a file from the
+            filesystem.
 
     """
-    def __init__(self, stix_dir, allow_custom=True):
+    def __init__(self, stix_dir, allow_custom=True, encoding='utf-8'):
         super(FileSystemSource, self).__init__()
         self._stix_dir = os.path.abspath(stix_dir)
         self.allow_custom = allow_custom
+        self.encoding = encoding
 
         if not os.path.exists(self._stix_dir):
             raise ValueError("directory path for STIX data does not exist: %s" % self._stix_dir)
@@ -712,11 +724,13 @@ class FileSystemSource(DataSource):
                 type_results = _search_markings(
                     query, type_path, auth_ids,
                     self.allow_custom, version,
+                    self.encoding,
                 )
             else:
                 type_results = _search_versioned(
                     query, type_path, auth_ids,
                     self.allow_custom, version,
+                    self.encoding,
                 )
             all_data.extend(type_results)