On one hand if you explain/reach people with security concern of JS 
templates they will most likely rewrite it to JSON-style.
On the other hand if they blindly update their rails/don't read news - the 
only way to reach them is Deprecation warning. Or maybe just WARNING? 

What I actually want is to make people understand and check if they have 
this problem. Deprecation is on of the means to do it.

On Monday, December 2, 2013 8:40:52 AM UTC+7, will.bryant wrote:
>
> That's still OK if it's public data.  (Obviously anything with a CSRF 
> token in it isn't.)
>
> It'd be nice if it was more explicit though, as the vulnerable cases are 
> not obvious.
>
>
> On 2/12/2013, at 13:59 , Anthony Richardson <[email protected]<javascript:>> 
> wrote:
>
> Would a solution be to prevent rails apps from serving "non static" JS 
> from GET requests. Assets served from the asset pipeline would be allowed. 
> JS returned via controllers/views would need explicitly defined permission 
> to be served via a GET request.
>
>
> On Sun, Dec 1, 2013 at 11:28 PM, Greg Molnar <[email protected]<javascript:>
> > wrote:
>
>> Rails should move on, to API-like servers and single page apps, not 
>>> necessarily breaking old school tools, but such a dinosaur should be 
>>> considered as a bad & insecure practise. Why patch it then at all?
>>
>> Single page apps are not everyone's cup of tea. Maybe I am old school but 
>> I like to keep on the server side everything I can because I have more 
>> control there. 
>>
>> On Sunday, December 1, 2013 5:27:21 AM UTC+1, Egor Homakov wrote:
>>>
>>> This might work out, but damnit, isn't everyone agreed here that 
>>> "returning JS" is 2008 style?
>>>
>>>  Rails should move on, to API-like servers and single page apps, not 
>>> necessarily breaking old school tools, but such a dinosaur should be 
>>> considered as a bad & insecure practise. Why patch it then at all?
>>>  
>>>
>>> On Sunday, December 1, 2013 2:19:09 AM UTC+7, Brian D. Armstrong wrote:
>>>>
>>>> What about prefixing while(1) on the beginning of js responses with 
>>>> rack middleware, and then stripping them out client side? 
>>>>
>>>> http://stackoverflow.com/questions/2669690/why-does-
>>>> google-prepend-while1-to-their-json-responses
>>>>
>>>> This is the solution used by Facebook and Google.
>>>>
>>>> http://blag.7tonlnu.pl/blog/2012/09/27/json-hijacking-in-rails/
>>>>
>>>>
>>>>
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