1 files changed, 52 insertions, 0 deletions
diff --git a/sh/curlkg b/sh/curlkg
new file mode 100755
index 0000000..4276e82
--- /dev/null
+++ 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"