Upload shell script for Seafile 12

seafile_upload.sh

#!/bin/bash
# Ref: https://extgit.isec.tugraz.at/con/vm-provisioning/-/blob/master/ci/seafile-upload.sh
# Seafile Version: 12.0.14
set -u
if [ $# -ne 2 ]; then
    echo "Usage:   $0 <SHARE_URL> <FILE>"
    echo "Example: $0 https://seafile.iaik.tugraz.at/u/d/xxx/ archive.tar.gz"
    exit 1
fi


SHARE_URL=$1
FILEPATH=$(realpath $2)
FILENAME=$(basename ${FILEPATH})

DOMAIN=$(echo ${SHARE_URL} | grep -Po ".+(?=/u/d.+)" )
SHARE_ID=$(echo ${SHARE_URL} | grep -Po "(?<=u/d/).+(?=/)" )

# First request to extract the path.
UPLOAD_PATH=$(curl -s ${SHARE_URL} | grep -Po "(?<=path: \").+?(?=\")")

# Second request to get an upload url.
UPLOAD_URL=$(curl -s "${DOMAIN}/api/v2.1/upload-links/${SHARE_ID}/upload/" -H 'Accept: application/json' | grep -Po "http.+(?=[\'\"])")

# Third request to perform the actual upload.
RESPONSE=$(curl "${UPLOAD_URL}?ret-json=1" -F file=@${FILEPATH} -F filename=${FILENAME} -F parent_dir="${UPLOAD_PATH}")
if [ $? -ne 0 ]
then
    exit 1
fi

# Check for an error response.
echo ${RESPONSE} | grep -q error
if [ $? -eq 0 ]
then
    echo ${RESPONSE}
    exit 1
fi