Add read and parse tar demo (#323)

Author: yanghua

examples/tar_streaming_read.py

@@ -0,0 +1,41 @@
+# ByteDance Volcengine EMR, Copyright 2024.
+#
+# 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 tos import EnvCredentialsProvider
+
+from tosfs.core import TosFileSystem
+import tarfile
+
+def streaming_read_tar_from_tos(bucket_name, tar_key):
+    tosfs = TosFileSystem(
+        endpoint_url=os.environ.get("TOS_ENDPOINT"),
+        region=os.environ.get("TOS_REGION"),
+        credentials_provider=EnvCredentialsProvider(),
+    )
+
+    with tosfs.open(f'tos://{bucket_name}/{tar_key}', 'rb') as tos_file:
+        with tarfile.open(fileobj=tos_file, mode='r|*') as tar:
+            for member in tar:
+                if member.isfile():
+                    file_obj = tar.extractfile(member)
+                    if file_obj is not None:
+                        file_content = file_obj.read()
+                        print(f'Read file {member.name} with size {len(file_content)} bytes')
+
+if __name__ == "__main__":
+    bucket_name = ''
+    tar_path = ''
+    streaming_read_tar_from_tos(bucket_name, tar_path)