skullmp3 downloader gui thing

skulldl

#!/bin/sh
title="mp3skull downloader"

put() { eval 'printf %s\\n "$'"$1"'"'; }

music_dir=$(xdg-user-dir MUSIC || put HOME)

cleanup() {
    ret=$?
    rm -f -- "$cookie_jar"
    trap - EXIT
    exit "$ret"
}
cookie_jar=
trap cleanup EXIT INT HUP TERM
cookie_jar=$(mktemp)

err() {
    zenity --error --title "$title" --text "$*"
    exit 1
}

parse_mp3_results() {
    awk '
        function striptags(s) {
            gsub(/<[^>]*>/,"",s)
            sub(/^ */,"",s)
            sub(/ *$/,"",s)
            return s
        }

        /class="mp3_title"/ {
            parse=1
            name=""
            duration=""
            bitrate=""
            details=""
            link=""
        }

        parse && /class="play_button"/ {
            parse=0
            print bitrate
            print details
            print name
            print link
        }

        parse && /class="mp3_title"/ {
            $0=substr($0, index($0, ">") + 1)
            name=striptags($0)
        }

        parse && /class='\''songInfoMobile'\''/ {
            getline
            $0=striptags($0)
            if ($2 == "kbps") {
                bitrate=sprintf("%03d",$1)
                sub("[^/]*/ ?","")
            }
            details=striptags($0)
        }

        parse && /class="download_button"/ {
            $0=substr($0,index($0,"href=")+6)
            sub(/".*$/,"")
            link=$0
        }
    '
}

select_mp3_results() {
    zenity --list --title "$title" --column Bitrate --column Details --column Name --column Link --multiple --print-column=4
}

url_basename() {
    local url
    url=$1
    url=${url%%'#'*}
    url=${url%%'?'*}
    url=${url##*/}
    put url
}

make_filename_from_url() {
    local name
    name=$(url_basename "$1")

    # Ensure it ends in mp3
    name=${name%?mp3}.mp3

    # lol race condition (ensure no filename collisions)
    while [ -e "$name" ]; do name="new-$name"; done

    put name
}

fancy_progress_meter() {
    stdbuf -oL awk 'BEGIN{RS="\r"}$1~/[0-9]/{print $1}' | tee /proc/self/fd/2 | zenity --progress "$@"
}

launch_download() {
    filename=$(make_filename_from_url "$1")
    pipe=$(mktemp -u)
    mkfifo -- "$pipe" || exit
    (<"$pipe" fancy_progress_meter --title "$title" --text "$filename" --no-cancel) &
    exec 2>"$pipe"
    rm -- "$pipe"
    stdbuf -o0 curl -g -o "$filename" -- "$1" || err "Failed to download $url"
}

fckh=$(curl -L -c "$cookie_jar" https://mp3skull.is/\? | grep -o 'name="fckh".*$' | cut -d\" -f4 | head -n1)
[ -n "$fckh" ] || err 'Could not fetch session ID from mp3skull.is'

terms=$(zenity --entry --title "$title" --text "Enter search terms:") || exit

reply=$(curl -v -g -L -b "$cookie_jar" -c "$cookie_jar" -G --data-urlencode q="$terms" --data-urlencode fckh="$fckh" https://mp3skull.is/search_db.php) || err 'Did not get a response from mp3skull for that search'

put reply | grep -qi 'your search session has expired' && err 'Could not search (bad session id)'

results=$(put reply | parse_mp3_results)
[ -n "$results" ] || err 'Could not find any search results'

selected=$(put results | select_mp3_results) || exit
[ -n "$selected" ] || err 'No results selected'

mkdir -p -- "$music_dir"
cd -- "$music_dir"
while [ -n "$selected" ]; do
    url=${selected%%|*}
    selected=${selected#*|}

    put url
    launch_download "$url" &

    [ "$selected" = "$url" ] && break
done
wait

Description

This will make a search on mp3skull.is, put the results into a table, and then let you select the ones you want (with support for selecting multiple items) and download them directly to your music folder.

Notes:

There seem to be a few anti-automation measures on the site. Perhaps this won't work when they get wind of it.
This probably doesn't have very good error handling. I tried.

Requires:

• curl for downloads
• awk for parsing (tested in gawk and mawk)
• zenity for the gui
• xdg-user-dirs (optional) to find out where your music folder is