formUpload - change mime type


I’m trying to upload excel files and and I need to change the mime type of the file.

Care to explain how can I achieve this?

“The MIME Type of the uploaded file defaults to application/octet-stream and the character set defaults to the one configured in gatling.conf (UTF-8 by default). Don’t forget to override them when needed.”


I don’ seet where the mime type option is located on the conf file…