diff --git a/swh/storage/in_memory.py b/swh/storage/in_memory.py
--- a/swh/storage/in_memory.py
+++ b/swh/storage/in_memory.py
@@ -169,7 +169,7 @@
         """
         return self._content_add(contents, with_data=False)
 
-    def content_get(self, ids):
+    def content_get(self, ids, start=0, end=-1):
         """Retrieve in bulk contents and their data.
 
         This function may yield more blobs than provided sha1 identifiers,
@@ -201,7 +201,10 @@
                 yield None
                 continue
 
-            yield {'sha1': obj_id, 'data': data}
+            if end != -1:
+                yield {'sha1': obj_id, 'data': data[start:end]}
+            else:
+                yield {'sha1': obj_id, 'data': data}
 
     def content_get_range(self, start, end, limit=1000, db=None, cur=None):
         """Retrieve contents within range [start, end] bound by limit.
diff --git a/swh/storage/storage.py b/swh/storage/storage.py
--- a/swh/storage/storage.py
+++ b/swh/storage/storage.py
@@ -334,7 +334,7 @@
 
         return summary
 
-    def content_get(self, content):
+    def content_get(self, content, start=0, end=-1):
         """Retrieve in bulk contents and their data.
 
         This generator yields exactly as many items than provided sha1
@@ -369,7 +369,10 @@
                 yield None
                 continue
 
-            yield {'sha1': obj_id, 'data': data}
+            if end != -1:
+                yield {'sha1': obj_id, 'data': data[start:end]}
+            else:
+                yield {'sha1': obj_id, 'data': data}
 
     @db_transaction()
     def content_get_range(self, start, end, limit=1000, db=None, cur=None):