Fix compatibilities issues with recent swift devel

Server does not set x-trans-id anymore
swift.common includes a more generic FileLikeIter object

swsync/containers.py

@@ -96,7 +96,11 @@ class Containers(object):
             container_headers = orig_container_headers.copy()
             for h in ('x-container-object-count', 'x-trans-id',
                       'x-container-bytes-used'):
-                del container_headers[h]
+                try:
+                    del container_headers[h]
+                except KeyError:
+                    # Nov2013: swift server does not set x-trans-id header
+                    pass
             p = dest_storage_cnx[0]
             url = "%s://%s%s" % (p.scheme, p.netloc, p.path)
             try:

swsync/objects.py

@@ -19,7 +19,12 @@ import logging
 import eventlet
 import swift.common.bufferedhttp
 import swift.common.http
-import swift.container.sync
+try:
+    from swift.container.sync import _Iter2FileLikeObject as FileLikeIter
+except ImportError:
+    # Nov2013: swift.common.utils now include a more generic object
+    from swift.common.utils import FileLikeIter
+
 from swiftclient import client as swiftclient
 import urllib
 import urllib2
@@ -93,7 +98,7 @@ def delete_object(dest_cnx,
                               http_conn=dest_cnx,
                               name=object_name)
 
-
+import swift.common.utils
 def sync_object(orig_storage_url, orig_token, dest_storage_url,
                 dest_token, container_name, object_name_etag):
     object_name = object_name_etag[1]
@@ -107,11 +112,10 @@ def sync_object(orig_storage_url, orig_token, dest_storage_url,
     post_headers = orig_headers
     post_headers['x-auth-token'] = dest_token
     sync_to = dest_storage_url + "/" + container_name
-    iterlike = swift.container.sync._Iter2FileLikeObject
     try:
         swiftclient.put_object(sync_to, name=object_name,
                                headers=post_headers,
-                               contents=iterlike(orig_body))
+                               contents=FileLikeIter(orig_body))
     except(swiftclient.ClientException), e:
         logging.info("error sync object: %s, %s" % (
                      object_name, e.http_reason))

tests/units/test_objects.py

@@ -16,6 +16,12 @@
 # under the License.
 import eventlet
 import swift
+try:
+    from swift.container.sync import _Iter2FileLikeObject as FileLikeIter
+except ImportError:
+    # Nov2013: swift.common.utils now include a more generic object
+    from swift.common.utils import FileLikeIter
+
 import swiftclient
 
 import swsync.objects as swobjects
@@ -86,8 +92,7 @@ class TestObject(test_base.TestCase):
         def put_object(url, name=None, headers=None, contents=None):
             self.assertEqual('obj1', name)
             self.assertIn('x-auth-token', headers)
-            self.assertIsInstance(contents,
-                                  swift.container.sync._Iter2FileLikeObject)
+            self.assertIsInstance(contents, FileLikeIter)
             contents_read = contents.read()
             self.assertEqual(len(contents_read), len(body))