Download a jamendo album as flac using the new v3.0 API (remember to insert your own application client id)

flacmendo.sh

#!/bin/bash
# deps: bash, curl, sed, metaflac, jq
# remember to insert your own application client id (see CLIENTID below)
# to get an application client id register at http://developer.jamendo.com

set -e
set -u

function filtername() {
	tr -cs "[:alnum:] \-&\(\)\?!" _
}

function j() {
	echo -n "$1" | jq -r "$2"
}

CLIENTID="YOUR_CLIENT_ID"
ALBUMID=$(echo "$1" | sed -e 's/.\+\/album\/\([0-9]\+\)\/.\+$/\1/')
BASEURL="http://api.jamendo.com/v3.0"

JSON=$(curl -s "$BASEURL/albums/tracks?client_id=$CLIENTID&format=json&limit=1&id=$ALBUMID&imagesize=500&audioformat=flac")
DATA=$(j "$JSON" '.results[0]')

IMGURL=$(j "$DATA" '.image')
ARTIST=$(j "$DATA" '.artist_name')
ALBUM=$(j "$DATA" '.name')
RELEASEDATE=$(j "$DATA" '.releasedate')
ALBUMDIR=$(echo -n "$ARTIST - $ALBUM" | filtername)

TRACKS=$(j "$JSON" '.results[0].tracks')
LENGTH=$(j "$TRACKS" '.|length')
PADLENGTH=$(printf %02d $LENGTH)

echo "$ARTIST - $ALBUM"
echo "Creating directory..."
mkdir -p "$ALBUMDIR"
cd "$ALBUMDIR"

echo "Saving album cover..."
curl -s -z folder.jpg -o folder.jpg "$IMGURL"

for ((i=0; i<$LENGTH; i++)); do
	TRACK=$(j "$TRACKS" ".[$i]")
	NAME=$(j "$TRACK" '.name')
	POS=$(printf "%02d\n" $(j "$TRACK" '.position'))
	FILENAME=$(echo -n "$POS - $ARTIST - $NAME" | filtername)".flac"
	FILEURL=$(j "$TRACK" '.audiodownload')
	LICENSEURL=$(j "$TRACK" '.license_ccurl')
	echo "Downloading \"$NAME\"..."
	curl --http1.1 --progress-bar -o "$FILENAME" "$FILEURL" # FIXME: workaround for Jamendo HTTP/2 support
	echo -ne "\r\033[1A\033[0K\r"
	metaflac --remove-all-tags \
	         --set-tag="ARTIST=$ARTIST" \
	         --set-tag="TITLE=$NAME" \
	         --set-tag="ALBUM=$ALBUM" \
	         --set-tag="LICENSE=$LICENSEURL" \
	         --set-tag="COPYRIGHT=$LICENSEURL" \
	         --set-tag="TRACKNUMBER=$POS" \
	         --set-tag="TRACKTOTAL=$PADLENGTH" \
	         --set-tag="DATE=$RELEASEDATE" \
	         --set-tag="DISCNUMBER=1" \
		 --set-tag="CONTACT=$1" \
	         --import-picture-from="folder.jpg" \
	         "$FILENAME"
done

I was getting the following error: parse error: Invalid numeric literal at line 1, column 6
Replacing the API URL to the HTTPS one (https://api.jamendo.com/v3.0) fixed it.