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07 May 07

poocs.net—Multi-domain single-signon

    • Single-signon is such a common feature request for many site networks. And while frequent at that, the powers that be impose difficulties on this task that make it a daunting experience for every web developer. In this piece, I’m outlining a practical approach for a hosted Rails application.



      Revisiting the definition of “single-signon” we’ll declare that this means:




      1. A user has to be able to login with the same credentials across multiple sites
      2. For convenience, we want a user to be logged in on site B if he had logged in on site A before
      3. If a user logs out of a single site, we want him to be logged out in all other sites as well
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