[TYPO3-core] RFC: #17500: Improve error handling in ExtDirect router

[Helmut Hummel]

Hi,

this is a SVN patch request.

Type: Bugfix

Bugtracker references:
http://bugs.typo3.org/view.php?id=17500

Branches: 4_5, trunk

Problem:
Even if something goes wrong in a ExtDirect request, the request gets
processed, which lead to unexpected results.

Solution:
Do not process the request, but just return the error message instead.

Note:
The current behavior is especially annoying after the addition of the
CSRF protection, because in case of an invalid request, a security token
error message is sent, which is wrong.


For better readability of what changed, I added a patch without
whitespace changes

Kind regards,
Helmut

-- 
Helmut Hummel
TYPO3 Security Team Leader

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