#!/bin/sh

usage() {
  cat <<__EOF__
usage: $(basename $0) [-hl] [-u user] [-X args] [-d args]
-h        print this help text
-l        print list of files to download
-u user   download as authenticated user
-X args   extra arguments to pass to xargs
-d args   extra arguments to pass to the download program

__EOF__
}

username=
xargsopts=
prompt=
list=
while getopts hlu:xX:d: option; do
  case $option in
  h)
    usage
    exit
    ;;
  l) list=yes ;;
  u)
    prompt=yes
    username="$OPTARG"
    ;;
  X) xargsopts="$OPTARG" ;;
  d) download_opts="$OPTARG" ;;
  ?)
    usage
    exit 2
    ;;
  esac
done

cat <<__EOF__
      Please note that running this script will result in the entire data collection to be downloaded, i.e. 27.38 GB in 102 files.

      To refine the selection and download, visit the following URL:

           https://archive.eso.org/scienceportal/home?data_collection=FDS

      and specify the relevant additional query constraints.

      Do you want to proceed with running this script (y/N)?
__EOF__

read continue_prompt

if [ "$continue_prompt" != "y" ]; then
  exit 0;
fi

if test -z "$xargsopts"; then
  #no xargs option speficied, we ensure that only one url
  #after the other will be used
  xargsopts='-L 1'
fi

if test -n "$prompt" -a -z "$list"; then
  trap 'stty echo 2>/dev/null; echo "Cancelled."; exit 1' INT HUP TERM
  stty -echo 2>/dev/null
  printf 'Password: '
  read password
  echo ''
  stty echo 2>/dev/null
fi

# use a tempfile to which only user has access
tempfile=$(mktemp /tmp/dl.XXXXXXXX 2>/dev/null)
test "$tempfile" -a -f $tempfile || {
  tempfile=/tmp/dl.$$
  (umask 077 && : >$tempfile)
}
trap 'rm -f $tempfile' EXIT INT HUP TERM

echo "auth_no_challenge=on" >$tempfile
# older OSs do not seem to include the required CA certificates for ESO
echo "check-certificate=off" >>$tempfile
if [ -n "$prompt" ]; then
  echo "--http-user=$username" >>$tempfile
  echo "--http-password=$password" >>$tempfile

fi
WGETRC=$tempfile
export WGETRC

unset password

if test -n "$list"; then
  cat
else
  xargs $xargsopts wget $download_opts
fi <<'__EOF__'
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.261
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.263
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.265
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.267
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.269
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.271
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.273
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.275
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.277
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.279
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.281
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.283
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.285
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.287
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.289
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.291
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.293
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.295
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.297
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.299
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.301
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.303
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.305
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.307
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.309
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.311
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.313
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.315
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.317
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.319
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.321
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.323
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.325
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.327
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.329
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.331
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.333
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.335
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.337
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.339
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.341
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.343
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.345
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.347
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.349
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.351
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.353
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.355
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.357
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.359
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.361
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.363
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.365
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.367
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.369
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.371
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.373
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.375
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.377
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.379
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.381
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.383
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.385
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.387
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.389
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.391
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.393
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.395
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.397
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.399
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.401
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.403
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.405
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.407
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.409
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.411
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.413
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.415
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.417
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.419
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.421
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.423
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.425
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.427
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.429
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.431
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.433
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.435
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.437
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.439
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.441
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.443
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.445
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.447
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.449
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.451
https://dataportal.eso.org/dataPortal/file/ADP.2020-08-26T11:45:32.453
https://dataportal.eso.org/dataPortal/file/ADP.2020-11-03T14:44:00.361
https://dataportal.eso.org/dataPortal/file/ADP.2020-11-03T14:44:00.363
https://dataportal.eso.org/dataPortal/file/ADP.2020-11-03T14:44:00.365
https://dataportal.eso.org/dataPortal/file/ADP.2020-11-03T14:44:00.367
https://dataportal.eso.org/dataPortal/file/ADP.2020-11-03T14:44:00.369
__EOF__