init

6 files changed, 207 insertions, 0 deletions

diff --git a/README.md b/README.md
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+My not maintained, not used, archived codes/configs.
+
+# Not working codes/configs:
+
+curlkg
diff --git a/sh/convwall b/sh/convwall
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+#!/bin/sh
+# CONVert WALLpaper
+
+# target image aspect ratio
+wratio=$SCR_WIDTH
+hratio=$SCR_HEIGHT
+# chop how much from center
+chopnum=99%
+
+# my benchmark shows -ping is much faster than default
+# https://github.com/ImageMagick/ImageMagick/issues/3183#issuecomment-800955241
+width=$(identify -ping -format '%w' "$1")
+height=$(identify -ping -format '%h' "$1")
+
+ratio=$((wratio*100/hratio))
+dim=$((width*100/height))
+
+if [ "$dim" -ne "$ratio" ]; then
+	if [ "$dim" -lt "$ratio" ]; then
+		chopgeom="${chopnum}x0"	
+		width=$((height*wratio/hratio))
+	else
+		chopgeom="0x$chopnum"	
+		height=$((width*hratio/wratio))
+	fi
+	# may throw error "sort: write failed: 'standard output': Broken pipe \n sort: write error"
+	# caused by head exit (or close stdin) before sort output complete, can ignore
+	# https://stackoverflow.com/questions/46202653/bash-error-in-sort-sort-write-failed-standard-output-broken-pipe
+	bgcolor=$(convert "$1" -gravity center -chop "$chopgeom" -define histogram:unique-colors=true -format %c histogram:info:- | sort -rn | head -n1 | awk \{print\ \$3\} | cut -c1-7)
+	# another approach is to use "$width" or "x$height" for geometry, current approach is more readable
+	convert "$1" -gravity center -background "$bgcolor" -extent "${width}x$height" "$2"
+else
+	echo 'same aspect ratio, no need to convert' >&2
+	exit 1
+fi
diff --git a/sh/curlkg b/sh/curlkg
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+#!/bin/sh
+
+# references:
+# https://blog.csdn.net/qq_41730930/article/details/79327757
+# https://blog.csdn.net/u011112876/article/details/89634505
+# https://github.com/pystardust/ytfzf
+
+homepage_url='https://node.kg.qq.com/cgi/fcgi-bin/kg_ugc_get_homepage'
+music_url='https://node.kg.qq.com/cgi/fcgi-bin/fcg_get_play_url'
+# num seems only 8 and 15 works
+num=15
+tmp_file="$(mktemp)"
+
+get_json () {
+	curl -s -G --data-urlencode type=get_uinfo -d outCharset=utf-8 -d start="$1" -d num=$num -d share_uid="$uid" "$homepage_url" | sed 's/.*({\(.*\)}).*/{\1}/'
+}
+
+# concurrent file append with less than 4096 bytes will be atomic on arch linux ext4
+# so need to process json data before append to the file, to append less than 4096 bytes for each process
+# another appraoch is to use a loop to write to several files each corresponding to one process
+# https://stackoverflow.com/questions/1154446/is-file-append-atomic-in-unix
+# https://unix.stackexchange.com/questions/458653/parallel-processes-appending-outputs-to-an-array-in-a-bash-script
+process_json() {
+	jq -r '.data.ugclist[]|"'"$music_url"'?shareid=\(.shareid)\n out=\(.title)_\(.time).m4a"' >> "$tmp_file"
+}
+
+while getopts u: opt; do
+	case $opt in
+		u) uid="$OPTARG";;
+		\?) exit 1;;
+	esac
+done
+# for lan lan, uid=649b9e82272a348b
+# for cheng ruan, uid=64949d822c25328c
+[ -z "$uid" ] && echo 'error: must provide share_uid
+ex: curlkg -u 649b9e82272a348b ./' >&2 && exit 1 
+shift $((OPTIND-1))
+download_dir="${1:-"$PWD"}"
+[ -d "$download_dir" ] || mkdir -p "$download_dir"
+
+first_json="$(get_json 1)"
+ugc_total_count=$(echo "$first_json" | jq '.data.ugc_total_count')
+echo "$first_json" | process_json
+# can also use while loop with i=$((i+1))
+# the calculation considers both ugc_total_count%num==0 and ugc_total_count%num>0
+for i in $(seq 2 $(((ugc_total_count+num-1)/num))); do
+	get_json "$i" | process_json &
+done
+
+wait
+aria2c -d "$download_dir" --auto-file-renaming=false --console-log-level=warn -i "$tmp_file"
+rm "$tmp_file"
diff --git a/sh/curlncm b/sh/curlncm
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+++ b/sh/curlncm
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+#!/bin/sh
+# rewrite TianyiShi2001's python script which rewrite NeteaseCloudMusicApi node.js api
+
+# references:
+# https://github.com/ytdl-org/youtube-dl/issues/18051#issuecomment-859964832
+# https://github.com/Binaryify/NeteaseCloudMusicApi
+# info about encrytion and api: 
+# https://github.com/metowolf/NeteaseCloudMusicApi/wiki
+# https://github.com/darknessomi/musicbox/wiki
+
+# lan lan, aid=48860966, rid=793052426, example id=1397315179,1817498734
+# cheng ruan, aid=46703185, rid=792968433
+
+# trial and error to get dj_max, don't know why, maybe because it is 2^31 and it is the size limit of whatever type of the variable
+dj_max=2147483647
+dl_urls_tmp="$(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 "$dl_urls_tmp"
diff --git a/sh/matlab b/sh/matlab
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+#!/bin/sh
+
+# for matlab version R2022a
+# https://wiki.archlinux.org/title/MATLAB#Blank/grey_UI_when_using_WM_(non-reparenting_window_manager)
+# https://wiki.archlinux.org/title/Java#Gray_window,_applications_not_resizing_with_WM,_menus_immediately_closing
+# https://wiki.archlinux.org/title/MATLAB#Unable_to_launch_the_MATLABWindow_application
+# https://faq.i3wm.org/question/2564/cant-open-matlab-from-dmenu.1.html
+# https://wiki.archlinux.org/title/MATLAB#Desktop_entry
+# use /tmp as working (startup) directory and save simulink files there to avoid cross filesystem hardlink error:
+# https://bbs.archlinux.org/viewtopic.php?id=277970
+
+cmd () {
+	_JAVA_AWT_WM_NONREPARENTING=1 LD_PRELOAD=/lib64/libfreetype.so exec "$bin_dir/matlab" -sd "$startup_dir" -desktop -nosplash "$@"
+}
+
+startup_dir=/tmp/matlab
+bin_dir="$HOME/programs/MATLAB/R2022a/bin"
+addon_dir="$HOME/MATLAB Add-Ons"
+[ -d "$startup_dir" ] || mkdir "$startup_dir"
+
+# my workaround for simulink gyroscope compile errors: 
+# "avr-gcc: error: I2Cdev.o: No such file or directory" (also for other .o files)
+# "Code generation information file does not exist." (caused by no .o file error before I guess)
+# I guess it is still cross filesystem hardlink error
+# need to set path in matlab manually once for "$startup_dir/$addon_dir" sub dirs inside
+[ -d "$startup_dir/$addon_dir" ] || cp -r "$addon_dir" "$startup_dir"
+
+if ! cmd "$@"; then
+	"$bin_dir/activate_matlab.sh"
+	cmd "$@"
+fi
diff --git a/sh/shufwall b/sh/shufwall
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+#!/bin/sh
+
+if [ -z "$1" ]; then
+	file=$(find -L "$XDG_PICTURES_DIR/wallpapers" -type f | shuf -n 1)
+else
+	file=$(find -L "$@" -maxdepth 1 -type f | shuf -n 1)
+fi
+
+display -resize "${SCR_WIDTH}x$SCR_HEIGHT" -backdrop -window root "$file"