Index: /sandbox/camptocamp/Studio/studio/lib/archivefile.py
===================================================================
--- /sandbox/camptocamp/Studio/studio/lib/archivefile.py (revision 2131)
+++ /sandbox/camptocamp/Studio/studio/lib/archivefile.py (revision 2131)
@@ -0,0 +1,34 @@
+import os, zipfile, tarfile
+
+def extractall(archive, dstdir):
+    """ extract zip or tar content to dstdir"""
+    
+    if zipfile.is_zipfile(archive.name):
+        z = zipfile.ZipFile(archive.name)
+        for name in z.namelist():
+            targetname = name
+            if targetname.endswith(os.path.sep):
+                targetname = targetname[:-1]
+
+            # don't include leading "/" from file name if present
+            if targetname.startswith(os.path.sep):
+                targetname = os.path.join(dstdir, targetname[1:])
+            else:
+                targetname = os.path.join(dstdir, targetname)                
+            targetname = os.path.normpath(targetname)
+
+            # Create all upper directories if necessary.    
+            upperdirs = os.path.dirname(targetname)
+            if upperdirs and not os.path.exists(upperdirs):
+                os.makedirs(upperdirs)
+
+            if not name.endswith(os.path.sep):
+                # copy file
+                file(targetname, 'wb').write(z.read(name))
+
+    elif tarfile.is_tarfile(archive.name):
+        tar = tarfile.open(archive.name)
+        tar.extractall(path=dstdir)
+    else:
+        # raise error
+        pass