Tomboy Web Sync Explained

Tomboy WebSync Explained 25 Oct 2009 foss.my 2009 Mohanaraj Gopala Krishnan mohangk@gmail.com

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Questions for you? • Use Tomboy or any other application for note taking ? • More then one machine ? • Keep notes in sync ? • Built a GUI app that speaks to web service ? • Does OAuth authentication ? • Synchronises data into the cloud ? • Use some for of hosted application ? (webmail, ﬁleshare, notes/todo, pics etc. ?) • Concern about/Considered your freedoms? • Data portability ?

Not your grandma’s notepad • Actively developed - 5 years , released 1.0 on 21st of Sept 2009 • Wiki - links • Notebooks - group notes • Search • Background save • Formatting • Add-in system • Really cool developers - sandy, brad etc • Active community - IRC, mailing list • Built on Mono • Ports : Conboy (https://garage.maemo.org/projects/conboy/), Gnote (http://live.gnome.org/Gnote), Tomdroid (https://launchpad.net/tomdroid) http://www.ﬂickr.com/photos/sparktography/64946647/

Platform support • Mac • Windows • Linux • Android - alpha • Maemo

Add-in ecosystem • Extensive add-in collection • Blogposting • Latex • Bugzilla • Evolution • Many more - http://live.gnome.org/ Tomboy/PluginList

Add-in development • Built on Mono.Addins framework • Different type of Add-Ins • Note add-in • Application add-in • Sync add-in http://www.halloweencostumeideas.com/adult-plug-socket-costume.html

Getting Tomboy 1.0 • Mac, Windows, Src -http:// projects.gnome.org/tomboy/download.html • Ubuntu - https://launchpad.net/ ~tomboy-packagers/+archive/stable • SUSE (one click)- data:text/x-suse- ymu,http://armstrong-clan.net/dump/ tomboy.ymp • Fedora, Centos, Slackware, etc ? - Build instructions - http://live.gnome.org/Tomboy/ Developers

Synchronisation of notes • Local ﬁle sync + external transfer (gvfs, sshfs etc) • WebDAV • Tomboy WebSync http://www.ﬂickr.com/photos/eugene/186980377/

Tomboy WebSync • Communicates over HTTP to keep the server and the Tomboy client in sync • Browser sends and receives data from websites • Tomboy sends and receives data from Snowy - JSON

Tomboy WebSync • Client server HTTP based protocol with JSON representation for data and metadata • Beneﬁts from HTTP- compression, caching, authentication etc. • Client implemented as add-in in Tomboy 1.0 • Server implementations • Snowy • Midgard CMS • Ubuntu ONE

Ubuntu One • Canonicals cloud offering • Notes - via Tomboy • Files • Free - up to 2GB, 50GB USD10 a month • https://one.ubuntu.com/

Snowy • Python - Django based • django-piston, django- revision • Multi user • Actively under development • AGPL

Getting Snowy • URL - http:// live.gnome.org/Snowy • git clone git:// git.gnome.org/snowy • Install dependencies, python related, django • Run using django server or install on apache via WSGI - http:// live.gnome.org/Snowy/ WSGI

DEMO (I hope its not fscked) http://icanhascheezburger.com/2007/03/12/is-it-safe/

Sync steps • Introspection • Authorisation • Data synchronisation http://www.ﬂickr.com/photos/mar00ned/188634413/

Introspection Allows for the client to determine information about the server http://icanhascheezburger.com/2009/01/04/funny-pictures-is-where-da-rubs-gok/

Introspection http://tomboysync/api/1.0/ http://tomboysync/api/1.0/user

Authorisation Allows for the server to ensure that the client is authorised to access the data http://icanhascheezburger.com/2009/10/24/funny-pictures-you-can-trust-me/

Authorisation - OAuth • Uses OAuth • Allows secure connection without needing to store usernames and password - stores access token http://forums.vwvortex.com/zerothread?id=4468563

Synchronisation • Subversion - like • There is a running version number for the notes on the server • Local copy of notes are like working directory • When sync starts Tomboy requests changes since the latest version in its local repository • Download changes - apply against local copy (svn up) • Uploads local changes (svn commit)

Handling conﬂicts • Happens when there are local changes to a note that has also been changed on the server or a different client • Determined client side • Overwrite or rename http://icanhascheezburger.com/2007/08/21/mow-mow-mow-me-mow-mow/

AGPL - Why bother? "It's stupidity. It's worse than stupidity: it's a marketing hype campaign," "It's just as bad as using a proprietary program. .... If you use a proprietary program or somebody else's web server, you're defenseless..." RMS - http://www.guardian.co.uk/technology/ http://geekz.co.uk/lovesraymond/archive/stallmans-tarball 2008/sep/29/cloud.computing.richard.stallman

AGPL - Why bother? • GPL -modify, and study, freedom to redistribute source code - only to recipients of the program • AGPLof these freedoms scope - broadens the to those who use the application over the internet

Summary

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Tomboy Web Sync Explained

by Mohanaraj Gopala Krishnan

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