radiko.sh

#!/bin/bash

set -xeu

LOGDIR=/masaru/logs

exec > >(tee ${LOGDIR}/radiko_$(date +%Y-%m-%d_%H%M).log)
exec 2>&1

if [ $# -lt 3 ]; then
    echo "usage : $0 station RECTIMEMIN title"
    exit 1
fi

CHANNEL=$1
RECTIMEMIN=$2
OUTFILEPREFIX=$3
OUTFILEBASEPATH=${4:-/home/share/podcast/radiko}

RTMPDUMP=/usr/bin/rtmpdump
FFMPEG=/usr/bin/ffmpeg

OUTFILENAME=${OUTFILEBASEPATH}/${OUTFILEPREFIX}_`date +%Y-%m-%d_%H%M`
FLVFILEEXT=".flv"
AACFILEEXT=".aac"
MP3FILEEXT=".mp3"

# 1->AAC, 2->MP3
OUTFILETYPE=1

RECTIME=`expr ${RECTIMEMIN} \* 60`

mkdir -p ${OUTFILEBASEPATH}
cd ${OUTFILEBASEPATH}

#playerurl=http://radiko.jp/player/swf/player_3.0.0.01.swf
playerurl=http://radiko.jp/player/swf/player_4.1.0.00.swf
playerfile=./player.swf
keyfile=./authkey.png

#
# get player
#
if [ ! -f $playerfile ]; then
    wget -q --tries 5 -O $playerfile $playerurl

    if [ $? -ne 0 ]; then
        echo "failed get player"
        exit 1
    fi
fi

#
# get keydata (need swftools)
#
if [ ! -f $keyfile ]; then
    swfextract -b 14 $playerfile -o $keyfile

    if [ ! -f $keyfile ]; then
        echo "failed get keydata"
        exit 1
    fi
fi

if [ -f auth1_fms_${OUTFILEPREFIX}_${CHANNEL} ]; then
    rm -f auth1_fms_${OUTFILEPREFIX}_${CHANNEL}
fi

#
# access auth1_fms
#
wget -q \
    --header="pragma: no-cache" \
    --header="X-Radiko-App: pc_1" \
    --header="X-Radiko-App-Version: 2.0.1" \
    --header="X-Radiko-User: test-stream" \
    --header="X-Radiko-Device: pc" \
    --post-data='\r\n' \
    --no-check-certificate \
    --save-headers \
    --tries=5 \
    --timeout=5 \
    -O auth1_fms_${OUTFILEPREFIX}_${CHANNEL} \
    https://radiko.jp/v2/api/auth1_fms

if [ $? -ne 0 ]; then
    echo "failed auth1 process"
    exit 1
fi

#
# get partial key
#
authtoken=`cat auth1_fms_${OUTFILEPREFIX}_${CHANNEL} | perl -ne 'print $1 if(/x-radiko-authtoken: ([\w-]+)/i)'`
offset=`cat auth1_fms_${OUTFILEPREFIX}_${CHANNEL} | perl -ne 'print $1 if(/x-radiko-keyoffset: (\d+)/i)'`
length=`cat auth1_fms_${OUTFILEPREFIX}_${CHANNEL} | perl -ne 'print $1 if(/x-radiko-keylength: (\d+)/i)'`

partialkey=`dd if=$keyfile bs=1 skip=${offset} count=${length} 2> /dev/null | base64`

echo "authtoken: ${authtoken} \noffset: ${offset} length: ${length} \npartialkey: $partialkey"

rm -f auth1_fms_${OUTFILEPREFIX}_${CHANNEL}

if [ -f auth2_fms_${OUTFILEPREFIX}_${CHANNEL} ]; then
    rm -f auth2_fms_${OUTFILEPREFIX}_${CHANNEL}
fi

#
# access auth2_fms
#
wget -q \
    --header="pragma: no-cache" \
    --header="X-Radiko-App: pc_1" \
    --header="X-Radiko-App-Version: 2.0.1" \
    --header="X-Radiko-User: test-stream" \
    --header="X-Radiko-Device: pc" \
    --header="X-Radiko-Authtoken: ${authtoken}" \
    --header="X-Radiko-Partialkey: ${partialkey}" \
    --post-data='\r\n' \
    --no-check-certificate \
    --tries=5 \
    --timeout=5 \
    -O auth2_fms_${OUTFILEPREFIX}_${CHANNEL} \
    https://radiko.jp/v2/api/auth2_fms

if [ $? -ne 0 -o ! -f auth2_fms_${OUTFILEPREFIX}_${CHANNEL} ]; then
    echo "failed auth2 process"
    exit 1
fi

echo "authentication success"

areaid=`cat auth2_fms_${OUTFILEPREFIX}_${CHANNEL} | perl -ne 'print $1 if(/^([^,]+),/i)'`
echo "areaid: $areaid"

rm -f auth2_fms_${OUTFILEPREFIX}_${CHANNEL}

#
# get stream-url
#

if [ -f ${CHANNEL}.xml ]; then
    rm -f ${CHANNEL}.xml
fi

wget -q "http://radiko.jp/v2/station/stream/${CHANNEL}.xml"

stream_url=`echo "cat /url/item[1]/text()" | xmllint --shell ${CHANNEL}.xml | tail -2 | head -1`
url_parts=(`echo ${stream_url} | perl -pe 's!^(.*)://(.*?)/(.*)/(.*?)$/!$1://$2 $3 $4!'`)

rm -f ${CHANNEL}.xml

#
# rtmpdump
#


RETRYCOUNT=0
while :
do
#    ${RTMPDUMP} -v \
#        -r "rtmpe://w-radiko.smartstream.ne.jp" \
#        --playpath "simul-stream.stream" \
#        --app "${CHANNEL}/_definst_" \
#        -W $playerurl \
#        -C S:"" -C S:"" -C S:"" -C S:$authtoken \
#        --live \
#        --flv ${OUTFILENAME}${FLVFILEEXT} \
#        --hashes \
#        --stop ${RECTIME}
    rtmpdump \
        -r ${url_parts[0]} \
        --app ${url_parts[1]} \
        --playpath ${url_parts[2]} \
        -W $playerurl \
        -C S:"" -C S:"" -C S:"" -C S:$authtoken \
        --live \
        --flv ${OUTFILENAME}${FLVFILEEXT} \
        --hashes \
        --stop ${RECTIME}
    if [ $? -ne 1 -o `wc -c ${OUTFILENAME}${FLVFILEEXT} | awk '{print $1}'` -ge 10240 ]; then
        break
    elif [ ${RETRYCOUNT} -ge 5 ]; then
        echo "failed rtmpdump"
        exit 1
    else
        RETRYCOUNT=`expr ${RETRYCOUNT} + 1`
        sleep 1
    fi
done

if [ ${OUTFILETYPE} -ne 2 ]; then
    #AAC
    ${FFMPEG} -y -i "${OUTFILENAME}${FLVFILEEXT}" -vn -acodec copy "${OUTFILENAME}${AACFILEEXT}"
else
    #MP3
    ${FFMPEG} -y -i "${OUTFILENAME}${FLVFILEEXT}" -vn -ab 96k "${OUTFILENAME}${MP3FILEEXT}"
fi

rm -f ${OUTFILENAME}${FLVFILEEXT}

sleep 30
MP4Box -noprog -ipod -add "$OUTFILENAME.aac" -new "$OUTFILENAME.m4a"

#eyeD3 -2 --to-v2.4 --set-encoding=utf8 --title="${OUTFILEPREFIX}_$(date +%m%d)" --year=$(date +%Y) "$OUTFILENAME.m4a"