Rails - Rendering a page in JSON based conditionally on the URL? -

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i have page want conditionally render in json based on if there either .json or /.json @ end of url, how reddit it, example https://www.reddit.com/r/pics/.json renders page in json. rendering page in json easy enough render json: @some_data, i'm not sure how make conditionally based on url. how go setting up?

first of define routes resources

resources :xvaziris

just append url .json

here example:

http://localhost:3000/xvaziris.json

json example


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