Typo3 extbase json output

Question

I try to create controller that handles ajax requests.

I found out, that I have to add this to my TS config:

ajaxCall = PAGE
ajaxCall {
    typeNum = 999
    config.disableAllHeaderCode = 1
    config.metaCharset = UTF-8
    xhtml_cleaning = 0
    admPanel = 0
    10 = COA
    10 < tt_content.list.20.registration_userregistration
}

And my controller looks like this:

/**
 * JSONController
 */
class JSONController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController {

    /**
     * @var string
     */
    protected $defaultViewObjectName = 'TYPO3\\CMS\\Extbase\\Mvc\\View\\JsonView';

    /**
     * action test
     *
     * @return string
     */
    public function testAction() {
        $this->view->assign('value', "001");
    }
}

This works, I get a blank page with "001" on it. But if I look at the source, there are 4 empty lines, and "001" is in the 5th line.

-empty-
-empty-
-empty-
-empty-
"001"

I have no idea why...

score 4 · Answer 1 · edited May 23 '17 at 11:44

4

I don't get, why are you using some view for rendering JSON ???

public function testAction() {
    $data = array('value'=>'001');
    return json_encode($data);
}

Of course you should set Content-type: application/json - where do you prefer - in your TS or directly in the action before return;

Other clue: maybe it's caused by tt_content (just guesing), for JSON actions it's best to include them directly via Bootstrap, first register new FE plugin in your ext_localconf.php:

\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
    'VENDORNAME.' . $_EXTKEY,
    'JsonDataPlugin',
    array('JSON' => 'test',),
    array('JSON' => 'test',)
);

And modify your TS:

myAjaxPage = PAGE
myAjaxPage {

  typeNum = 999
  10 = USER
  10 {
    userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
    extensionName = Yourextname
    pluginName = JsonDataPlugin
    vendorName = VENDORNAME
  }

  config {
    disableAllHeaderCode = 1
    additionalHeaders = Content-type:application/json
    xhtml_cleaning = 0
    admPanel = 0
    debug = 0
    no_cache = 1
  }

}

(don't forget to change Yourextname and VENDORNAME for your own, also clear the system cache)

Finally: Check all your files and make sure that there's no empty lines before <?php and after ?> (the best option is to remove ?> from each file - and let PHP to terminate script at the end of file). Also it can be fixed in the source of TYPO3 as described in other naswer.

edited May 23 '17 at 11:44

Community

1
1

answered Jan 13 '15 at 16:14

biesior

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Tanks, but I tried this already and had the same problem... I dont know why I use a view for this, im new in typo3 if you have a better way, tell me. :) – Marcel Jan 13 '15 at 17:34
Did this, but still the same problem – Marcel Jan 14 '15 at 07:14
And how about normal page? it has empty lines too? Right? – biesior Jan 14 '15 at 07:18
No, " " is the first line in the source – Marcel Jan 14 '15 at 07:20
If I call the controller without the &type=999 there are four empty lines in the source again. – Marcel Jan 14 '15 at 07:28
So you have empty lines before `` somwhere there in some config file(s), try to locate them i.e. by search tool of your IDE, also make sure your files haven't BOM marker – biesior Jan 14 '15 at 07:46
See this topic for description, of course in your case it may be other file(s): http://stackoverflow.com/a/15522791/1066240 – biesior Jan 14 '15 at 07:52
Thank you, I already found out the problem... It was in another file which I included to my controller. – Marcel Jan 14 '15 at 07:54

score 3 · Accepted Answer · answered Jan 14 '15 at 07:42

Okay, I got it...

I included a file with some functions named user.php

/**
 * User service
 *
 * @var \Whmcs\Registration\Service\User
 * @inject
 */
protected $user = NULL;

In this file there were empty lines after the ?> tag. These empty lines were the problem. I deleted them and now everything works fine. :)

Typo3 extbase json output

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