The issue with Symfony 3.4 that causes a plain text header to be returned with a JSON response is related to a change in the default behavior of the JsonResponse class. In previous versions of Symfony, the JsonResponse class would set the content type header to "application/json" by default. However, starting with Symfony 3.4, the default content type header was changed to "text/html". This causes an issue when trying to return JSON responses because some clients may not recognize the "text/html" content type header and treat the response as plain text, leading to errors or unexpected results.
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Asked: 2022-07-10 11:00:00 +0000
Seen: 10 times
Last updated: Oct 27 '22
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