1 files changed, 51 insertions, 0 deletions
diff --git a/catalog/packages/biz/common.py b/catalog/packages/biz/common.py
new file mode 100644
index 0000000..ce77a41
--- /dev/null
+++ b/catalog/packages/biz/common.py
@@ -0,0 +1,51 @@
+# Copyright 2018 ZTE Corporation.
+#
+# 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
+
+from catalog.pub.config.config import CATALOG_ROOT_PATH
+from catalog.pub.utils import fileutil
+
+CHUNK_SIZE = 1024 * 8
+
+
+def save(remote_file, vnf_pkg_id):
+    local_file_name = remote_file.name
+    local_file_dir = os.path.join(CATALOG_ROOT_PATH, vnf_pkg_id)
+    local_file_name = os.path.join(local_file_dir, local_file_name)
+    if not os.path.exists(local_file_dir):
+        fileutil.make_dirs(local_file_dir)
+    with open(local_file_name, 'wb') as local_file:
+        for chunk in remote_file.chunks(chunk_size=CHUNK_SIZE):
+            local_file.write(chunk)
+    return local_file_name
+
+
+def read(file_path, start, end):
+    fp = open(file_path, 'rb')
+    fp.seek(start)
+    pos = start
+    while pos + CHUNK_SIZE < end:
+        yield fp.read(CHUNK_SIZE)
+        pos = fp.tell()
+    yield fp.read(end - pos)
+
+
+def parse_file_range(file_path, file_range):
+    start, end = 0, os.path.getsize(file_path)
+    if file_range:
+        [start, range_end] = file_range.split('-')
+        range_end = range_end.strip() if range_end.strip() else end
+        start, end = int(start.strip()), int(range_end)
+    return start, end