Download video from nicovideo

get-nicovideo.sh

#!/bin/sh

PROGNAME=$(basename $0)
#urldecode="nkf --url-input"
urldecode='eval echo -e $(sed "s/+/ /g; s/%/\\\\x/g")'
account=""
password=""
cookie=""
savecookie=""
outdir="."
ids=""

usage() {
	echo "Usage: $PROGNAME [OPTION]... ID..."
	echo "Download video(s) specified by IDs"
	echo
	echo "Options:"
	echo "	-c, --cookie COOKIEFILE			Save current login info to COOKIEFILE"
	echo "	-s, --save-cookie COOKIEFILE	Load login info from COOKIEFILE"
	echo "	-u, --username USERNAME			Set nicovideo account user name"
	echo "	-p, --password PASSWORD			Set nicovideo account password"
	echo "	-o, --outdir DIRNAME			Save videos to another directory instead of current directory"
	exit 1
}

if (( $# == 0 )); then
	usage
fi

while (( $# > 0 )); do
	case "$1" in
		--help)
			usage
			;;
		--cookie)
			cookie=$2
			shift 2
			;;
		--save-cookie)
			savecookie=$2
			shift 2
			;;
		--username)
			account=$2
			shift 2
			;;
		--password)
			password=$2
			shift 2
			;;
		--outdir)
			outdir=$2
			shift 2
			;;
		-*)
			opts=$1
			shift
			if [[ $opts =~ "h" ]]; then
				usage
			fi
			if [[ $opts =~ "c" ]]; then
				cookie=$1
				shift
			fi
			if [[ $opts =~ "s" ]]; then
				savecookie=$1
				shift
			fi
			if [[ $opts =~ "u" ]]; then
				account=$1
				shift
			fi
			if [[ $opts =~ "p" ]]; then
				password=$1
				shift
			fi
			if [[ $opts =~ "o" ]]; then
				outdir=$1
				shift
			fi
			;;
		*)
			ids="$ids $1"
			shift
			;;
	esac
done

if [[ -z $account ]] && [[ -z $cookie ]]; then
	echo "$PROGNAME: account user name must be specified"
	exit 1
fi
if [[ -z $password ]] && [[ -z $cookie ]]; then
	echo "$PROGNAME: account password must be specified"
	exit 1
fi

tmpdir=`mktemp --tmpdir -d $PROGNAME.$$.XXXXXX`
tmpcookie="$tmpdir/tmpcookie.txt"

onExit() {
	[[ -n $tmpdir ]] && rm -R $tmpdir
}

trap onExit EXIT
trap "trap - EXIT; onExit; exit -1" INT PIPE TERM

if [[ -z $cookie ]]; then
	curl -s -c "$tmpcookie" -d mail="$account" -d password="$password" "https://secure.nicovideo.jp/secure/login?site=niconico" > /dev/null

	if ! [[ -z $savecookie ]]; then
		cp "$tmpcookie" "$savecookie"
	fi
else
	cp "$cookie" "$tmpcookie"
fi

for id in $ids; do
	id=$(echo $id | grep -oE "[a-z0-9]+$")
	echo -n "$id - "
	thumb_info=$(curl -s -b "$tmpcookie" "http://ext.nicovideo.jp/api/getthumbinfo/$id")
	res=$(echo $thumb_info | grep -oE "<nicovideo_thumb_response status=\"[^\"]+" | cut -c 35-)

	if [[ $res == "fail" ]]; then
		echo "video not found."

		continue
	fi

	title=$(echo $thumb_info | grep -oE "<title>[^<]+" | cut -c 8-)
	movie_type=$(echo $thumb_info | grep -oE "<movie_type>[^<]+" | cut -c 13-)

	curl -s -b "$tmpcookie" -c "$tmpcookie" "http://www.nicovideo.jp/watch/$id" > /dev/null
	video_info=`curl -s -b "$tmpcookie" "http://flapi.nicovideo.jp/api/getflv?v=$id&as3=1"`

	if [[ $video_info == "closed=1&done=true" ]]; then
		echo "access denied."

		continue
	fi

	video_url=$(echo $video_info | grep -oE "url=[^&]+" | cut -c 5- | $urldecode)

	filename="$id - $title.$movie_type"
	echo "$title.$movie_type"

	curl -b "$tmpcookie" -o "$outdir/$filename" "$video_url"
done