Comment 1 for bug 1061949

This causes an error in syncdaemon, which is logged but not propagated to the control panel UI.

The right fix is to avoid the error, although there's also a problem that the control panel doesn't seem to be receiving or handling the error callback.

Here's the syncdaemon log from trying this:

2012-10-05 09:37:03,661 - ubuntuone.SyncDaemon.InteractionInterfaces - DEBUG - change_public_access: args (<ubuntuone.syncdaemon.interaction_interfaces.SyncdaemonPublicFiles object at 0x104804490>, u'fe76df32-6a95-4a6d-ab74-e4512c50b8e9', u'434f2d47-6a52-4b98-961b-2c28f8e6c3ce', True), kwargs {}.
2012-10-05 09:37:03,661 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - ChangePublicAccess share:UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9') node:UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce') ChangePublicAccess(running='False') queueing
2012-10-05 09:37:03,661 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: SYS_QUEUE_ADDED, kwargs: {'command': <ubuntuone.syncdaemon.action_queue.ChangePublicAccess object at 0x105e983b0>}
2012-10-05 09:37:03,661 - ubuntuone.SyncDaemon.Pb - DEBUG - emitting 'on_metaqueue_changed' to all (1) connected clients.
2012-10-05 09:37:03,662 - ubuntuone.SyncDaemon.Pb - DEBUG - emitting 'on_request_queue_added' to all (0) connected clients.
2012-10-05 09:37:03,662 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - ChangePublicAccess share:UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9') node:UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce') ChangePublicAccess(running='False') starting
2012-10-05 09:37:03,663 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - ChangePublicAccess share:UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9') node:UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce') ChangePublicAccess(running='False') started
2012-10-05 09:37:03,663 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - ChangePublicAccess share:UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9') node:UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce') ChangePublicAccess(running='False') running
2012-10-05 09:37:03,666 - ubuntuone.SyncDaemon.InteractionInterfaces - DEBUG - change_public_access: result None.
2012-10-05 09:37:03,919 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: AQ_DOWNLOAD_FILE_PROGRESS, kwargs: {'deflated_size': 36632583L, 'node_id': 'a0c94db7-be64-4eac-b2b8-30d8e615168f', 'share_id': '', 'n_bytes_read': 4352496}
2012-10-05 09:37:03,919 - ubuntuone.SyncDaemon.Pb - DEBUG - emitting 'on_download_file_progress' to all (1) connected clients.
2012-10-05 09:37:04,513 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: AQ_DOWNLOAD_FILE_PROGRESS, kwargs: {'deflated_size': 36632583L, 'node_id': 'a0c94db7-be64-4eac-b2b8-30d8e615168f', 'share_id': '', 'n_bytes_read': 4425286}
2012-10-05 09:37:04,514 - ubuntuone.SyncDaemon.Pb - DEBUG - emitting 'on_download_file_progress' to all (1) connected clients.
2012-10-05 09:37:04,603 - ubuntuone.SyncDaemon.ActionQueue - ERROR - ChangePublicAccess share:UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9') node:UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce') ChangePublicAccess(running='False') failure: ('FORBIDDEN', "Can't make shared files public.") (traceback follows)
Traceback (most recent call last):
  File "ubuntuone/syncdaemon/action_queue.pyc", line 1522, in run
  File "twisted/internet/defer.pyc", line 1037, in _inlineCallbacks
  File "twisted/python/failure.pyc", line 382, in throwExceptionIntoGenerator
  File "ubuntuone/syncdaemon/action_queue.pyc", line 2252, in _change_public_access_http
  File "twisted/internet/defer.pyc", line 1037, in _inlineCallbacks
  File "twisted/python/failure.pyc", line 382, in throwExceptionIntoGenerator
  File "ubuntuone/syncdaemon/action_queue.pyc", line 930, in webcall
  File "twisted/internet/defer.pyc", line 1039, in _inlineCallbacks
  File "ubuntu_sso/utils/webclient/txweb.pyc", line 161, in request
WebClientError: ('FORBIDDEN', "Can't make shared files public.")
2012-10-05 09:37:04,603 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: AQ_CHANGE_PUBLIC_ACCESS_ERROR, kwargs: {'share_id': UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9'), 'node_id': UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce'), 'error': "Can't make shared files public."}
2012-10-05 09:37:04,603 - ubuntuone.SyncDaemon.InteractionInterfaces - DEBUG - handle_AQ_CHANGE_PUBLIC_ACCESS_ERROR: args (<ubuntuone.syncdaemon.interaction_interfaces.SyncdaemonEventListener object at 0x105efadd0>,), kwargs {'share_id': UUID('fe76df32-6a95-4a6d-ab74-e4512c50b8e9'), 'node_id': UUID('434f2d47-6a52-4b98-961b-2c28f8e6c3ce'), 'error': "Can't make shared files public."}.
2012-10-05 09:37:04,604 - ubuntuone.SyncDaemon.Pb - DEBUG - emitting 'on_public_access_change_error' to all (1) connected clients.
2012-10-05 09:37:04,604 - ubuntuone.SyncDaemon.InteractionInterfaces - DEBUG - handle_AQ_CHANGE_PUBLIC_ACCESS_ERROR: result None.
2012-10-05 09:37:04,604 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: SYS_QUEUE_REMOVED, kwargs: {'command': <ubuntuone.syncdaemon.action_queue.ChangePublicAccess object at 0x105e983b0>}