diff --git a/synapse/rest/media/v1/filepath.py b/synapse/rest/media/v1/filepath.py
new file mode 100644
index 0000000000..ed9a58e9d9
--- /dev/null
+++ b/synapse/rest/media/v1/filepath.py
@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+
+class MediaFilePaths(object):
+
+ def __init__(self, base_path):
+ self.base_path = base_path
+
+ def default_thumbnail(self, default_top_level, default_sub_type, width,
+ height, content_type, method):
+ top_level_type, sub_type = content_type.split("/")
+ file_name = "%i-%i-%s-%s-%s" % (
+ width, height, top_level_type, sub_type, method
+ )
+ return os.path.join(
+ self.base_path, "default_thumbnails", default_top_level,
+ default_sub_type, file_name
+ )
+
+ def local_media_filepath(self, media_id):
+ return os.path.join(
+ self.base_path, "local_content",
+ media_id[0:2], media_id[2:4], media_id[4:]
+ )
+
+ def local_media_thumbnail(self, media_id, width, height, content_type,
+ method):
+ top_level_type, sub_type = content_type.split("/")
+ file_name = "%i-%i-%s-%s-%s" % (
+ width, height, top_level_type, sub_type, method
+ )
+ return os.path.join(
+ self.base_path, "local_thumbnails",
+ media_id[0:2], media_id[2:4], media_id[4:],
+ file_name
+ )
+
+ def remote_media_filepath(self, server_name, file_id):
+ return os.path.join(
+ self.base_path, "remote_content", server_name,
+ file_id[0:2], file_id[2:4], file_id[4:]
+ )
+
+ def remote_media_thumbnail(self, server_name, file_id, width, height,
+ content_type, method):
+ top_level_type, sub_type = content_type.split("/")
+ file_name = "%i-%i-%s-%s" % (width, height, top_level_type, sub_type)
+ return os.path.join(
+ self.base_path, "remote_thumbnail", server_name,
+ file_id[0:2], file_id[2:4], file_id[4:],
+ file_name
+ )
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