upload_file_to_moodle.sh

#!/usr/bin/env bash
# based on https://github.com/ltalirz/moodle-qformat_qtex/blob/master/moodle-converter/moodle_question_converter.sh

function usage {
    printf \
        "usage: %s <URL to Moodle> <username> <password> <input file>\n" $(basename $0)
    exit 1
}

nCommandLineArgs=$#
if (( $nCommandLineArgs != 4 ))
then
    usage
fi

argUrlToMoodle=$1
argUsername=$2
argPassword=$3
argInputFile=$4

COOKIE_FILE=$(mktemp)
LOGIN_URL="$argUrlToMoodle/login/index.php"
LOGOUT_URL="$argUrlToMoodle/login/logout.php"
UPLOAD_URL="$argUrlToMoodle/repository/repository_ajax.php?action=upload"

# Moodle login using the given username and password.
# @param 1 username
# @param 2 password
# As a result echoes the sesskey.
function login {
    username=$1
    password=$2
    local loginResponse=$(curl --silent --cookie-jar $COOKIE_FILE --location \
        --data "username=$username" --data "password=$password" \
        $LOGIN_URL)

    local sesskey=""
    if [[ $loginResponse =~ sesskey=([^=\"]*) ]]
    then
        sesskey=${BASH_REMATCH[1]}
    fi
    echo "$sesskey"
}

# Moodle logout.
# @param 1 sesskey
function logOut {
    sesskey=$1
    local logoutResponse=$(curl --silent --cookie-jar $COOKIE_FILE --location \
        "${LOGOUT_URL}?sesskey=$sesskey")
    # printf "%s\n" $logoutResponse
}

# Moodle file upload.
# @param 1 The file to upload.
# @param 2 itemid, the id to associate with the uploaded file.
# @param 3 clientid
# @param 4 sesskey
function upload {
    local file=$1
    local itemid=$2
    local clientid=$3
    local sesskey=$4
    local uploadResponse=$(curl --silent --cookie $COOKIE_FILE --location \
        --header "Content-Type: multipart/form-data" \
        --form "repo_upload_file=@$file" \
        --form "title=" --form "author=" --form "license=" \
        --form "itemid=$itemid" --form "repo_id=4" --form "p=" \
        --form "page=" --form "env=filepicker" --form "sesskey=$sesskey" \
        --form "client_id=$clientid" --form "maxbytes=-1" \
        --form "areamaxbytes=-1" \
        --form "ctx_id=2" --form "savepath=/" \
        $UPLOAD_URL)

    printf "%s\n" "$uploadResponse"
}

# Echoes a timestamp, i. e. the seconds since 1970-01-01 00:00:00 UTC
function timestamp {
    date +"%s"
}

itemid=$RANDOM
clientid=$RANDOM

sesskey=$(login $argUsername $argPassword)
upload $argInputFile $itemid $clientid $sesskey
logOut $sesskey
rm $COOKIE_FILE