Nullboard stores all its data in the browser's internal
LocalStorage is readily available and it is dead simple to
use, but it comes with a risk of being inadvertently purged
when the browser temporary data is manually cleared.
Also, it is often desirable to keep an off-browser copy of
Nullboard contents to protect against other loss and
corruption risks, just as it's done with other types of
Nullboard can be set up to automatically send a copy of a
board to the secondary storage when the board is modified.
Once enabled, the top-right menu symbol changes to reflect
the state of the backups.
If Nullboard runs into a backup error, it will keep retrying
on every board change and with every page reload. Once the
backup goes through, all pending backups across all boards
will be run as well.
When used on Windows, Nullboard can make backups to a local
disk, storing each board revision in a separate file in
the user profile.
As it is generally impossible for an in-browser code to work
with local files directly, Nullboard employs the help a small
companion program called Nullboard Agent to do it on its behalf.
The Agent lives in the system tray, listens to the Nullboard
backup requests and takes care of saving backups to the
Nullboard talks to the Agent using the standard web protocol,
HTTP, so from its perspective backing up is a simple matter
of issuing requests to a local web server.
Setting up a local backup involves downloading and running
the agent and then "pairing" it with the Nullboard instance
using an Access Token.
The setup process is described in more detail below
Nullboard can also be set up to send the backups to a remote
web server. Internally it works exactly the same way except
that the backup request is issued against a user-specified
server rather than the localhost.
Setting up a remote backup involves installing a server
component and then pairing it with Nullboard with an Access
Nullboard support is already in place and the server
component is planned.
The backup protocol is very simple and comprises just 3
request types. See checkStatus
class in the
Setting up local backups
Download Nullboard Agent and save it somewhere on the
local disk, e.g. in %ProgramFiles%\Nullboard folder:
nb-agent.exe Ver 0.1 / 125KB
Launch it and you should see the "Up and running" tray notification:
If you don't see the icon, you will need to drag it from
the "overflow area" of the system tray to the tray's main space:
Right-click on the icon, select "New Backup", enter a name
for the backup, click on Create.
This creates a backup entry in the agent's configuration
and automatically places its Access Token on the clipboard.
Go into Nullboard, select top-right menu > Auto-backups.
Enable Local backup, paste the Access Token, then Check the
setup and Save it.
At this point you will already have all boards backed up and
stored locally in %LocalAppData%\Nullboard
You can quickly get to this folder using the tray menu:
Folder contents will look something like this:
For every board there will be a subfolder named with its internal ID,
In that subfolder there'll be meta.json
file that contains
current board revision and its undo history and one or more
files with the actual board data.
files are the same as those created by the
"Export board..." function and they can be imported the same way.
part of the file name is board's revision.
At the root of the folder there will also be app-config.json
file that contains general Nullboard settings.
Finally, when a board is deleted, its folder is moved to
folder and kept
there until manually deleted.