Page behaviour when returning JSON

[operat]

I have a "Data" page, whose template file does not contain any HTML markup, as it only collects several data, prepares it as JSON and returns it like this:

return json_encode($data);

It generally works, which is fine obviously. However, when I access the page address in the browser, I can see the JSON text – which is the expected, but not the wanted behaviour.

Is there a way to return the JSON only, when the page is requested with AJAX and redirect it, when accessed directly?

I'm aware of $config->ajax. For some reason, however, it's never 'true', hence doesn't have any helpful effect here.

Any thoughts or advice? Thank you!

[Zeka]

if($config->ajax) {
	header('Content-Type: application/json');
	echo $json;
	$this->halt(); // like die();
} else throw new Wire404Exception();

 

[Robin S]

8 hours ago, operat said:

I'm aware of $config->ajax. For some reason, however, it's never 'true', hence doesn't have any helpful effect here.

See how PW determines $config->ajax here.

So you may need to set the X-Requested-With header:

 

[operat]

On 5/29/2019 at 11:40 PM, Robin S said:

So you may need to set the X-Requested-With header

@Robin S Setting the header in the vanilla JS XMLHttpRequest solved the actual problem. $config->ajax works as expected, now. Thank you!

On 5/29/2019 at 3:27 PM, Zeka said:

header('Content-Type: application/json');
echo $json;

@Zeka A quite useful hint, which helped to improve the code. Thanks!