How to cache JSON

[hiasl]

Support Request

Hi Ben,
we want to introduce a feature where we can render all HTML pages in a certain JSON format. This is realized using a custom route with the normal URL and ".json" at the end. We then generate the JSON with TWIG, set the correct mime type and deliver it. In our current setup Blitz however caches the page like this <whatever.json>/index.html and therefor it is not sent with a JSON mime type anymore.

I found this issue #443 where you wrote a fix, but in my case it has the same behaviour, although we are on a later version. I did not find anything in the docs pointing me in the right direction.

So my questions:

• Is it possible to cache my .json requests
• If yes, how can I enable it?

Thanks

Plugin Version

4.23.7

[bencroker]

Can you send me a sample template so I can test locally?

[matuzo]

In our routes.php we have:

<?php
return [
  '<shareSlug:{slug}>.json' => ['template' => '_entry-json.twig']
];

In _entry-json.twig:

{% header "Content-Type: application/json; charset=utf-8" -%}

{
    "title": "this is just a test"
}

That should be enough to reproduce it. On the first visit you get a JSON file but on all consecutive visits it's HTML.

[bencroker]

It works as expected in my local tests. Can you please double check that you’ve enabled the cacheNonHtmlResponses config setting?

Keep in mind that if you’re using server rewrites, you may need to configure your web server to set the appropriate content type for URIs ending in .json.