Mass file upload with curl. This is for a specific application, but can be adapted for others.

curl_mass_uploader.sh

#!/bin/bash                                                                                                                                                                        

upload_file () {
  SESSION=df831243-602e-4c27-8afe-09a6760be8ad
  XSRF=83872690-237b-c176-8830-ac11ba76d7b3
  URL="http://192.168.50.1:8080/api/UPLOOOD"
  echo "Handling file $1"
  curl -v -i -X POST -H "Content-Type: multipart/form-data" -H "Cookie: ring-session=$SESSION; XSRF-TOKEN=$XSRF" -F "file=@$1;type=application/vnd.openxmlformats-officedocument.s\
preadsheetml.sheet" -F "x-xsrf-token=$XSRF" $URL >> logifile.txt 2>&1
  echo "-----------------------" >> logifile.txt
}

export -f upload_file
find . -name "*.xlsx"|xargs -I {} bash -c 'upload_file {}'