fixes bug698318.

Work done by Ewan Mellor; I just fixed a conflict after merging trunk...

glance/server.py

@@ -192,7 +192,7 @@ def _upload(self, req, image_meta):
         registry.update_image_metadata(image_meta['id'], image_meta)
 
         try:
-            location = store.add(image_meta['id'], req.body)
+            location = store.add(image_meta['id'], req.body_file)
             return location
         except exception.Duplicate, e:
             logging.error("Error adding image to store: %s", str(e))

glance/store/filesystem.py

@@ -110,7 +110,7 @@ def add(cls, id, data):
         FLAGS.filesystem_store_datadir and <ID> is the supplied image ID.
 
         :param id: The opaque image identifier
-        :param data: The image data to write
+        :param data: The image data to write, as a file-like object
 
         :retval The location that was written, with file:// scheme prepended
         """
@@ -125,8 +125,11 @@ def add(cls, id, data):
             raise exception.Duplicate("Image file %s already exists!"
                                       % filepath)
 
-        f = open(filepath, 'wb')
-        f.write(data)
-        f.close()
+        with open(filepath, 'wb') as f:
+            while True:
+                buf = data.read(ChunkedFile.CHUNKSIZE)
+                if not buf:
+                    break
+                f.write(buf)
 
         return 'file://%s' % filepath