Torrent Download Script with Aria2C on Debian 12 using Command Line Interface

Script Generated using DeepSeek and ChatGPT
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aria2_torrent_downloader_v1.0.1-stable.sh
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###################### Script beginging

#!/usr/bin/env bash
# aria2_torrent_downloader_v1.0.1-stable.sh
# Version: 1.0.1-stable
# Description: Batch torrent downloader using aria2c with progress and verbose logging.

set -euo pipefail

VERSION="1.0.1-stable"
CONF_FILE="$HOME/.aria2_torrent_downloader.conf"
LOG_DIR="${HOME}/.aria2_torrent_downloader_logs"
mkdir -p "$LOG_DIR"
LOGFILE="${LOG_DIR}/aria2_torrent_downloader_${VERSION}_$(date +%Y%m%d_%H%M%S).log"
TMP_URI_LIST="$(mktemp /tmp/aria2_uri_list.XXXXXX)"
trap 'rm -f "$TMP_URI_LIST"' EXIT

# Check aria2c
if ! command -v aria2c >/dev/null 2>&1; then
echo "❌ Error: aria2c is not installed or not in PATH."
exit 1
fi

echo "▶ aria2 Torrent Downloader — version: $VERSION"
echo " Verbose log: $LOGFILE"
echo

# Load / Ask for download directory
if [[ -f "$CONF_FILE" ]]; then
# shellcheck disable=SC1090
source "$CONF_FILE"
fi

if [[ -z "${DOWNLOAD_DIR:-}" ]]; then
echo "Enter full path for default download folder (e.g. /home/$USER/Downloads/torrents)"
read -r -p "Download directory: " user_dir
if [[ -z "$user_dir" ]]; then
echo "No directory provided. Exiting."
exit 1
fi
DOWNLOAD_DIR="$(cd "$(dirname "$user_dir")" && pwd)/$(basename "$user_dir")"
mkdir -p "$DOWNLOAD_DIR"
echo "DOWNLOAD_DIR=\"$DOWNLOAD_DIR\"" > "$CONF_FILE"
echo "Saved to config: $CONF_FILE"
else
echo "Using saved download directory: $DOWNLOAD_DIR"
fi
echo

# Collect torrent URLs
declare -a URLS
echo "Enter torrent URLs or magnet links one by one."
echo "Press Enter on an empty line when done (default = No more)."
count=0
while true; do
count=$((count + 1))
read -r -p "[$count] Torrent/Magnet URL: " uri
[[ -z "$uri" ]] && break
URLS+=("$uri")
done

if [[ ${#URLS[@]} -eq 0 ]]; then
echo "No URLs provided. Exiting."
exit 0
fi

for u in "${URLS[@]}"; do
echo "$u" >> "$TMP_URI_LIST"
done

# Aria2 options
ARIA2_OPTS=(
--input-file="$TMP_URI_LIST"
--dir="$DOWNLOAD_DIR"
--max-concurrent-downloads=50
--max-overall-download-limit=0
--max-connection-per-server=16
--split=16
--min-split-size=1M
--continue=true
--enable-dht=true
--bt-enable-lpd=true
--seed-time=0
--summary-interval=1
--console-log-level=info
--log="${LOGFILE}"
--log-level=debug
--allow-overwrite=true
--no-conf=true
)

echo
echo "🚀 Starting aria2c download..."
echo " Concurrent downloads: 50"
echo " Speed limit: Unlimited"
echo " Download folder: $DOWNLOAD_DIR"
echo

aria2c "${ARIA2_OPTS[@]}"
EXIT_CODE=$?

if [[ $EXIT_CODE -ne 0 ]]; then
echo "⚠️ aria2c exited with code $EXIT_CODE. Check log: $LOGFILE"
exit $EXIT_CODE
fi

echo
echo "✅ Downloads completed. Creating '.stopped' markers..."
for u in "${URLS[@]}"; do
if [[ "$u" =~ ^magnet: ]]; then
base=$(echo "$u" | sed -n 's/.*dn=\([^&]*\).*/\1/p' | sed 's/%20/ /g')
[[ -z "$base" ]] && base=$(echo "$u" | sed -n 's/.*btih:\([A-Za-z0-9]*\).*/\1/p' | cut -c1-10)
else
base=$(basename "${u%%\?*}")
fi
[[ -z "$base" ]] && base="unknown_${RANDOM}"

match=$(find "$DOWNLOAD_DIR" -maxdepth 1 -iname "*$base*" | head -n1 || true)
if [[ -n "$match" ]]; then
touch "${match}.stopped"
echo "Marked stopped: ${match}.stopped"
else
touch "${DOWNLOAD_DIR}/${base}.stopped"
echo "Marked fallback: ${DOWNLOAD_DIR}/${base}.stopped"
fi
done

echo
echo "🎯 All done!"
echo "Downloads: $DOWNLOAD_DIR"
echo "Logs: $LOGFILE"
echo "Change default folder? Edit $CONF_FILE"
echo


################## Script Ending