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diff --git a/sh/curlncm b/sh/curlncm
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+#!/bin/sh
+# rewrite TianyiShi2001's python script which rewrite NeteaseCloudMusicApi node.js api
+
+# references:
+# https://github.com/ytdl-org/youtube-dl/issues/18051#issuecomment-859964832
+# https://github.com/Binaryify/NeteaseCloudMusicApi
+# info about encrytion and api: 
+# https://github.com/metowolf/NeteaseCloudMusicApi/wiki
+# https://github.com/darknessomi/musicbox/wiki
+
+# lan lan, aid=48860966, rid=793052426, example id=1397315179,1817498734
+# cheng ruan, aid=46703185, rid=792968433
+
+# trial and error to get dj_max, don't know why, maybe because it is 2^31 and it is the size limit of whatever type of the variable
+dj_max=2147483647
+dl_urls_tmp="$(mktemp)"
+# printf 'e82ckenh8dichen8' | hexdump -ve '/1 "%02x"'
+key='653832636b656e683864696368656e38'
+url='/api/song/enhance/player/url'
+request_id=$(date +'%s%3N')_$(seq -w 1 1000 | shuf -n1)
+user_agent='Mozilla/5.0 (Linux; U; Android 9; zh-cn; Redmi Note 8 Build/PKQ1.190616.001) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.141 Mobile Safari/537.36 XiaoMi/MiuiBrowser/12.5.22'
+cookie="$(printf '"appver":"8.0.0","versioncode":"140","buildver":"1623455100","resolution":"1920x1080","__csrf":"","os":"pc","requestId":"%s"' "$request_id")"
+
+die () {
+	echo "error: $*" >&2
+	exit 1
+}
+
+# artist, song, djradio id
+while getopts a:i:r: opt; do
+	case $opt in
+		a) aid="$OPTARG";;
+		i) ids="$OPTARG";;
+		r) rid="$OPTARG";;
+		\?) exit 1;;
+	esac
+done
+shift $((OPTIND-1))
+download_dir="${1:-"$PWD"}"
+[ -d "$download_dir" ] || mkdir -p "$download_dir"
+
+if [ "$ids" ]; then
+	# temporary solution, can improve by auto curl names
+	data="$(echo "$ids" | tr ',' '\n' | awk '{printf("%s\t%s\n",$0,"songname")}')"
+else
+	if [ "$rid" ]; then
+		data="$(curl -s -G --data-urlencode id="$rid" -d limit="$dj_max" 'https://music.163.com/djradio' | grep 'songlist\|tt f-thide' | sed -e 's/.*songlist-\(.*\)" class.*/\1/g' -e 's/.*title="\(.*\)".*/\1/g' | paste -sd '\t\n' | sort | tr '/' '_')"
+	# can only curl featured 50 songs for the artist, can improve
+	elif [ "$aid" ]; then
+		data="$(curl -s -G --data-urlencode id="$aid" 'https://music.163.com/artist' | grep '\[{.*}\]' | sed -e 's/.*>\[{/\[{/' -e 's/}\]<.*/}\]/' | jq -r '.[]|[.id,.name]|@tsv' | sort | tr '/' '_')"
+	fi
+	# awk code not print separator at beginning and end steal from:
+	# https://unix.stackexchange.com/a/581785/459013
+	# not sure awk one-liner or paste way which is better, need benchmark
+	ids="$(echo "$data" | awk -F'\t' '{printf "%s%s",sep,$1;sep=","}')"
+	#ids="$(echo "$data" | awk -F'\t' '{print $1}' | paste -sd ',')"
+fi
+
+# I don't fully understand following several lines of code
+# I rewrite TianyiShi2001's python script, he rewrites NeteaseCloudMusicApi
+text="$(printf '{"ids":"[%s]","br":999000,"header":{%s}}' "$ids" "$cookie")"
+message="nobody${url}use${text}md5forencrypt"
+digest="$(printf '%s' "$message" | openssl dgst -md5 -hex | awk '{print $2}')"
+params="$(printf '%s-36cd479b6b5-%s-36cd479b6b5-%s' "$url" "$text" "$digest")"
+encrypted_params="$(printf '%s' "$params" | openssl enc -aes-128-ecb -K "$key" | hexdump -ve '/1 "%02X"')"
+# curl default user agent header seems not working
+curl -s -A "$user_agent" -d params="$encrypted_params" 'https://interface3.music.163.com/eapi/song/enhance/player/url' | jq -r '.data|sort_by(.id)|.[].url' > "$dl_urls_tmp"
+[ "$(echo "$data" | wc -l)" -ne "$(wc -l < "$dl_urls_tmp")" ] && die "number of download urls doesn't match request"
+
+# can't download some music if live abroad, may need proxy or vpn
+# using user_agent, content-type header, cookie header, referer are not necessary? but feels faster
+# not sure about cookie header format for aria2c, this link shows that it's kinda messy, so I didn't use it
+# https://github.com/aria2/aria2/issues/545#issuecomment-650070869
+echo "$data" | awk -F'\t' '{printf(" out=%s_%s.mp3\n",$2,$1)}' | paste "$dl_urls_tmp" - -d '\n' | aria2c -U "$user_agent" --header='Content-Type: application/x-www-form-urlencoded' --referer='https://music.163.com' -d "$download_dir" --auto-file-renaming=false --console-log-level=warn -i-
+rm "$dl_urls_tmp"