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Re: Maximally Consumable Data

• From: "bryan rasmussen" <rasmussen.bryan@g...>
• To: "Costello, Roger L." <costello@m...>
• Date: Mon, 7 Apr 2008 21:23:25 +0200

anyway it is a security hazard because when you do that the script
executes when you get it, That you are getting JSON in this way does
not change the fact that you are allowing a JavaScript to execute
inside of your client side application spac, opening up for all sorts
of attacks. However there is some interesting work being done that
may, at some point, allow one to get around this problem - look at
CAJA. However currently I stand be earlier statement that the XML is a
better solution because of better security control of data entering
into the application.

Cheers,
Bryan Rasmussen

On Mon, Apr 7, 2008 at 8:18 PM, Costello, Roger L. <costello@m...> wrote:
> Hi Mukul,
>
>
>  > IMHO, what's different (great) about this scenario?
>
>  I need to give more detail about how it works.
>
>  A JavaScript Ajax application that is running in a browser can only
>  fetch data from the domain that it came from.  It does this using the
>  XMLHttpRequest object.
>
>  Quoting now from Bulletproof Ajax:
>
>  "We can't use XMLHttpRequest to access the Web APIs offered by so many
>  sites these days.  That's a real shame because most APIs return their
>  data in XML, which would be available in responseXML.
>
>  The script element has no such security restrictions.  It's possible to
>  access a JavaScript file from another domain in this way:
>
>  <script type="text/javascript"
>
>  src="http://www.xfront.com/us_states/json/javascript/us_states.js"></sc
>  ript>
>
>  If you can request a JavaScript file from another domain, then you can
>  also request a JSON file.  Remember, JSON is nothing more than
>  JavaScript."
>
>  -- the author shows how this can be generated dynamically --
>
>  Thus, through this technique, the JavaScript running in your browser
>  can pull in data from any web service that serves up JSON (such as the
>  Yahoo web services).
>
>  /Roger
>
>
>
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• Follow-Ups:
  • Re: Maximally Consumable Data
    • From: "Manfred Staudinger" <manfred.staudinger@g...>

• References:
  • Maximally Consumable Data
    • From: "Costello, Roger L." <costello@m...>
  • Re: Maximally Consumable Data
    • From: "bryan rasmussen" <rasmussen.bryan@g...>
  • RE: Maximally Consumable Data
    • From: "Costello, Roger L." <costello@m...>
  • Re: Maximally Consumable Data
    • From: "Mukul Gandhi" <gandhi.mukul@g...>
  • RE: Maximally Consumable Data
    • From: "Costello, Roger L." <costello@m...>