AJAX request returns 200 but response body is empty

Asked Mar 26 '20 at 14:11

Active Mar 26 '20 at 14:11

Viewed 29 times

I have a jQuery AJAX call, which returns 200, but response body is empty.

$.ajax({
    method: 'GET',
    url: api,
    data: {
        'action': 'check',
        'ip': hostname
    },
    success: function(result) { ... },
    dataType: 'json'
});

I copy the actual request URL generated by the AJAX call into the browser, and I get the desired output (JSON).

https://example.com/sub/folder/index.php?action=check&ip=1.2.3.4

What could be wrong with the AJAX call?

asked Mar 26 '20 at 14:11

Obay

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Are you making a cross-domain AJAX request? Have you looked at the console or dev tools after attempting to make the request to check for errors? – Rory McCrossan Mar 26 '20 at 14:12
Did you check the network tab when making the AJAX request? – VLAZ Mar 26 '20 at 14:12
did u try `$.getJSON` – xdeepakv Mar 26 '20 at 14:12
1

@xdeepakv that won't make any difference – Rory McCrossan Mar 26 '20 at 14:12
yeah! can check with fetch("url", {mode: "no-cors"}) If issue, will throw exception – xdeepakv Mar 26 '20 at 14:13
1

So does jQuery. – Rory McCrossan Mar 26 '20 at 14:14
"but response body is empty" — How are you determining this? Have you checked the Network tab of the browser's developer tools? – Quentin Mar 26 '20 at 14:19
2

@xdeepakv — Don't do that. Adding `no-cors` will make it fail **silently** *without* throwing an exception in many cases. – Quentin Mar 26 '20 at 14:19
Yes, I checked the Network tab. That's how I knew response was empty. @VLAZ – Obay Mar 26 '20 at 14:21
@RoryMcCrossan hmm, yes it's a cross-domain AJAX request – Obay Mar 26 '20 at 14:21
That's your problem then. In the console there's probably a big error about missing CORS/Access-Control-Allow-Origin headers in the response – Rory McCrossan Mar 26 '20 at 14:21
@Obay — Does the success function fire at all? Have you added `console.log` to check? – Quentin Mar 26 '20 at 14:22
1

@RoryMcCrossan that seems to be it. Didn't notice it before since it's not an error, just a warning: `Cross-Origin Read Blocking (CORB) blocked cross-origin response with MIME type application/json` Thanks for the lead. – Obay Mar 26 '20 at 14:32
@Quentin yes the success function fires. – Obay Mar 26 '20 at 14:34

AJAX request returns 200 but response body is empty

0 Answers0