Saturday, August 22, 2009

sessionStorage cross domain

This is just a quick post about my last HTML5 sessionStorage implementation for "every" browser and this is the summary:

  • Linear Storage Protocol finally consistent as a stand alone general purpose storage (string, file, request)

  • RC4 Stream Cipher key generation without breaking characters (\x00 not in the random range)

  • Cross Domain Support, if both site and site support my implementation, they will not delete or modify each other domain information

  • optimized boot strap for frames and iframes, the storage parsing and reassignment is performed once and not every time which means zero delay when an iframe is injected or more frames uses the same implementation

Finally, few bug fixes and this version is both W3C Draft compatible and cross browser.

Known Supported Browsers

  • Chrome 1 and 2, version 3 or 4 should have native support for Web Storage

  • Internet Explorer 5, 6, and 7, 8 has native support for Web Storage

  • Opera 7, 8, 9, and 10 beta, hopefully 10 final will have native support

  • Safari 3, version 4 has native support for Web Storage

  • Firefox whatever version, since it supports Web Storage since version 1.5

  • Google Android and iPhone, but latest WebKit releases should support Web Storage

This is a mixed list of almost all A-Grade browsers but about Android and iPhone, the total amount of available RAM could be 2 Mb.
It is not suggested to store in any case massive amount of information but so far I have putted every kind of library avoiding server requests for each tab session and without problems.
The sessionStorage aim is, in any case, to remember an arbitrary amount of data for each session and for each tab, surpassing cookies limits without number of keys or amount of data limits.

This project will be part of vice-versa library in order to make vice-versa the cross browser "lingua franca" W3 framework able to bring standards where these are not present yet.

1.4 Special Guests

I would like to say a big thanks to Jonathan Cook (J5 in WebReflection comments) for his suggestions, patience, and ideas exchange ;)

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