Rewrite imagebuilder unpack_http_archive using python modules

usr/lib/python3.8/spoc/imagebuilder.py

@@ -1,10 +1,12 @@
 # -*- coding: utf-8 -*-
 
 import os
+import requests
 import shutil
 import stat
-import subprocess
+import tarfile
 import tempfile
+import zipfile
 
 from .container import Container
 from .image import Image
@@ -121,16 +123,21 @@ class ImageBuilder:
 
 def unpack_http_archive(src, dst):
     # Decompress an archive downloaded via http(s)
-    # TODO: Rewrite to python (requests, tarfile)
-    xf = 'xzf'
-    if src.endswith('.bz2'):
-        xf = 'xjf'
-    elif src.endswith('.xz'):
-        xf = 'xJf'
-    with subprocess.Popen(['wget', src, '-O', '-'], stdout=subprocess.PIPE) as wget:
-        with subprocess.Popen(['tar', xf, '-', '-C', dst], stdin=wget.stdout) as tar:
-            wget.stdout.close()
-            tar.wait()
+    with tempfile.TemporaryFile() as tmp_archive:
+        with requests.Session() as session:
+            resource = session.get(src, stream=True)
+            for chunk in resource.iter_content(chunk_size=None):
+                if chunk:
+                    tmp_archive.write(chunk)
+        tmp_archive.seek(0)
+        is_zip = zipfile.is_zipfile(tmp_archive)
+        tmp_archive.seek(0)
+        if is_zip:
+            with zipfile.ZipFile(tmp_archive) as zip:
+                zip.extractall(dst)
+        else:
+            with tarfile.open(fileobj=tmp_archive) as tar:
+                tar.extractall(dst, numeric_owner=True)
 
 def copy_tree(src, dst):
     # Copies files from the host