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Ubuntu One on KDE – Technical Aspects

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Following my post on Ubuntu One in KDE I would now like to take a closer look at how Ubuntu One works using KDE technologies and what the current state of affairs is. So be prepared for a lot of technical blah...

Something I need to make clear up front is that the KDE client does not connect to the Ubuntu One servers itself. This will probably sound odd to you, so let me explain just how both the KDE and GNOME clients generally work. There is a helper application for authentication (in up to 10.04 called ubuntuone-auth, in 10.10 and above ubuntu-sso-client) that handles authentication to Ubuntu One. Secondly there is a synchronization component called SyncDaemon, as one can assume it handles synchronization of data and is essentially the gateway to the the servers. Thirdly there are clients that talk to the SyncDaemon. Such a client could be a tray icon that informs you whether your SyncDaemon is actually connected or not. But it could just as well be an application to manage your shares. I implemented 2 of those using KDE or Qt technologies, namely the client structures and the authentication helper. I did not reimplement the SyncDaemon!

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