yuja-dl/yuja-dl

#!/bin/sh
# --------------------------------------
# name: yuja-dl
# main: Jaidyn Ann <jadedctrl@posteo.at>
# lisc: CC0
# date: 2021
# --------------------------------------

download_url() {
	local url="$1"
	local sub="$(echo "$url" | subdomain)"
	local id="$(get_url_id "$url" "$sub")"

	local captions_key="$(get_metadata "$sub" "$id" | caption_file_key)"
	local node_pid="$(get_metadata "$sub" "$id" | video_node_pid)"
	local flink="$(get_node_metadata "$sub" "$id" "$node_pid" | video_filelink)"
	local m3u8="$(get_video_source "$sub" "$id" "$flink" | video_source_m3u8_link)"

	if test -z "$OUTPUT"; then
		OUTPUT="$(get_metadata "$sub" "$id" | default_video_title)"
	fi

	curl -b "$COOKIES" -o "${OUTPUT}.srt" "$(caption_url "$sub" "$captions_key")"
	ffmpeg -i "$m3u8" -c copy "${OUTPUT}.mkv"
}


#---------------------------------------

get_url_id() {
	local url="$1"
	local sub="$2"
	if echo "$url" | grep "v=" > /dev/null; then
		echo "$url" \
		| video_vid
	elif echo "$url" | grep "u=" > /dev/null; then
		video_metadata "$url" "$sub" \
		| video_pid
	else
		>&2 echo "The URL provided is invalid― try pasting it again."
		>&2 echo "If you're sure you got it right, please report the URL"
		>&2 echo "as a bug (https://github.com/JadedCtrl/yuja-dl/)."
		exit 3
	fi
}

get_metadata() {
	local sub="$1"
	local id="$2"
	curl -b "$COOKIES" -s \
	"https://${sub}.yuja.com/P/Data/GetVideoListNodeInfo?videoPID=${id}"
}

caption_file_key() {
	jq -r .video \
	| jq -r .captionFileKey.value
}

video_node_pid() {
	jq -r .node \
	| jq -r .videoListNodePID
}

video_pid() {
    jq -r .videoPID
}

default_video_title() {
    jq -r .video \
    | jq -r .title
}

#---------------------------------------

get_node_metadata() {
	local sub="$1"
	local video_id="$2"
	local video_node_pid="$3"
	 curl -b "$COOKIES" -s \
		"https://${sub}.yuja.com/P/Data/VideoJSON" \
		--data-raw "video=${video_id}&node=${video_node_pid}"
}

video_filelink() {
	jq -r .video.videoLink
}

#---------------------------------------

get_video_source() {
	local sub="$1"
	local video_id="$2"
	local video_filelink="$3"
	curl -b "$COOKIES" -s \
	"https://${sub}.yuja.com/P/Data/VideoSource?video=${video_filelink}&videoPID=${video_id}"
}

video_source_m3u8_link() {
	jq -r .videoSources[]
}

#---------------------------------------

caption_url() {
	local subdomain="$1"
	local caption_key="$2"
	echo \
	"https://${subdomain}.yuja.com/P/DataPage/CaptionFile/${caption_key}"
}

#---------------------------------------

subdomain() {
	awk -F '.' '{print $1}' \
	| sed 's%.*//%%'
}

video_vid() {
	sed 's%.*v=%%' \
	| sed 's%&.*%%'
}

video_uid() {
    sed 's%.*u=%%' \
    | sed 's%&.*%%'
}

video_metadata() {
    local url="$1"
    local sub="$2"
    local uid="$(echo "$url" | video_uid)"
    curl -b "$COOKIES" -s \
    "https://${sub}.yuja.com/V/VideoDecryptLogicServlet?u=${uid}"
}

# INVOCATION
# --------------------------------------
usage() {
	>&2 echo "usage: yuja-dl URL [-o OUTPUT] [-c cookies.txt]"
	>&2 echo
	>&2 echo "  URL is a *.yuja.com URL with a video ID argument"
	>&2 echo "  OUTPUT is the basename for the mp4 and srt files"
	>&2 echo "  cookies.txt is an optional cookie-jar, used for authentication"
	>&2 echo "  with private videos. Should be exported from your web-browser."
	exit 2
}

if test "$#" -eq 0; then
   usage
fi

OPTIND=2
while getopts ":hc:o:" arg; do
    case "$arg" in
        h)
            usage ;;
        c)
            COOKIES="$OPTARG" ;;
        o)
            OUTPUT="$OPTARG" ;;
        :)
            echo "$0: Must supply an argument to -$OPTARG."
            exit 1 ;;
        ?)
            echo "Invalid option: -${OPTARG}"
            usage ;;
    esac
done

download_url "$1"