Can’t send a post request when the ‘Content-Type’ is set to ‘application/json’

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It turns out that CORS only allows some specific content types.

The only allowed values for the Content-Type header are:

  • application/x-www-form-urlencoded
  • multipart/form-data
  • text/plain

Source: https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS

To set the content type to be ‘application/json’, I had to set a custom content type header in the API. Just removed the last header and added this one:

->header('Access-Control-Allow-Headers', 'Content-Type');

and it is working all good.

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