MinIO Download

minio_download.sh

#!/bin/bash

# Usage:
#   ./minio_download.sh <ACCESS_KEY> <SECRET_KEY> <BUCKET> <OBJECT_PATH> <DEST_FILE> <MINIO_URL>
#   Or set via env vars:
#     MINIO_ACCESS_KEY, MINIO_SECRET_KEY, MINIO_BUCKET, MINIO_OBJECT, MINIO_DEST, MINIO_URL

ACCESS_KEY="${1:-$MINIO_ACCESS_KEY}"
SECRET_KEY="${2:-$MINIO_SECRET_KEY}"
BUCKET="${3:-$MINIO_BUCKET}"
OBJECT="${4:-$MINIO_OBJECT}"
DEST="${5:-$MINIO_DEST:-$OBJECT}"
MINIO_URL="${6:-$MINIO_URL}"
ALIAS_NAME="tempminio"

# Optional: Set to "1" to delete the file after download
AUTO_DELETE="${AUTO_DELETE:-0}"

# Validate
if [ -z "$ACCESS_KEY" ] || [ -z "$SECRET_KEY" ] || [ -z "$BUCKET" ] || [ -z "$OBJECT" ] || [ -z "$MINIO_URL" ]; then
  echo "Usage:"
  echo "  $0 <ACCESS_KEY> <SECRET_KEY> <BUCKET> <OBJECT_PATH> <DEST_FILE> <MINIO_URL>"
  echo "  or set env vars: MINIO_ACCESS_KEY, MINIO_SECRET_KEY, MINIO_BUCKET, MINIO_OBJECT, MINIO_DEST, MINIO_URL"
  exit 1
fi

# Install latest mc if needed
if ! command -v mc >/dev/null 2>&1; then
  echo "[INFO] Installing latest MinIO Client (mc)..."
  curl -sSL https://dl.min.io/client/mc/release/linux-amd64/mc -o /usr/local/bin/mc
  chmod +x /usr/local/bin/mc
fi

# Clean existing alias and set new one
mc alias rm "$ALIAS_NAME" >/dev/null 2>&1
if ! mc alias set "$ALIAS_NAME" "$MINIO_URL" "$ACCESS_KEY" "$SECRET_KEY" >/dev/null 2>&1; then
  echo "❌ Failed to connect to MinIO at $MINIO_URL with given credentials."
  exit 1
fi

# Get signed URL (valid for 1 minute)
SIGNED_URL=$(mc share download --expire=1m "$ALIAS_NAME/$BUCKET/$OBJECT" | awk '/^Share:/ {print $2}')

if [ -z "$SIGNED_URL" ]; then
  echo "❌ Failed to generate a download link."
  mc alias rm "$ALIAS_NAME" >/dev/null 2>&1
  exit 1
fi

echo "[INFO] Downloading: $SIGNED_URL"
curl -# -L "$SIGNED_URL" -o "$DEST"

# Optionally delete the file after download
if [ "$AUTO_DELETE" = "1" ]; then
  echo "[INFO] Deleting $DEST after download..."
  rm -f "$DEST"
fi

# Clean up
mc alias rm "$ALIAS_NAME" >/dev/null 2>&1