A script to rip a web audio stream and save it to a file.

savestream.sh

#! /bin/sh -Cefu

. /usr/local/bin/fortify.sh
. /usr/local/bin/mashlib.sh

MYLOGIN=$(id -un)
HOME=$(conc /home/ $MYLOGIN)

# defaults possibly overriden by config file
DESTDIR=$(conc $HOME /music/streams/croddur)
FORMAT=ogg
URL=http://some.stream.com:8000/stream.ogg
LOCALTZ=America/Los_Angeles

. $(conc $HOME /.savestream) || true

usage()
{
    echo 'usage: savestream START_DATE START_TIME END_DATE END_TIME' >&2
    echo '       savestream START_DATE START_TIME END_TIME' >&2
    echo '       savestream START_TIME END_TIME' >&2
    exit 2
}

prtime()
{
    local date=$1
    local time=$2
    local format=$3

    date -d $(conc TZ= '"' $LOCALTZ '"' ' ' $date ' ' $time) +$format
}

case $# in
    (4)
        START_DATE=$1 ; START_TIME=$2 ; END_DATE=$3 ; END_TIME=$4
        ;;
    (3)
        START_DATE=$1 ; START_TIME=$2 ; END_DATE=$START_DATE ; END_TIME=$3
        ;;
    (2)
        START_DATE=$(prtime tomorrow 12:00 %Y-%m-%d) ; START_TIME=$1 ; END_DATE=$START_DATE ; END_TIME=$2
        ;;
    (*)
        usage
        ;;
esac



START_TIMESTAMP=$(prtime $START_DATE $START_TIME %s)
END_TIMESTAMP=$(prtime $END_DATE $END_TIME %s)
LENGTH=$(( END_TIMESTAMP - START_TIMESTAMP ))
ATSPEC=$(prtime $START_DATE $START_TIME '%H%M %m/%d/%Y')

REALDIR=$(mktemp -d -p $DESTDIR $(conc $END_DATE .XXXXXXXXXXXX))
printf 'REALDIR=%s\n' $REALDIR
DESTFILE=$(conc $REALDIR /savestream. $FORMAT)
LOG=$(conc $REALDIR /savestream.log)
LOGFMT='%FT%H:%M:%S'

printf '/usr/bin/timeout %s ffmpeg -i %s -codec: copy -loglevel warning %s 2>&1 | ts "%s" >%s\n' \
       $LENGTH $URL $DESTFILE $LOGFMT $LOG | at $ATSPEC