Test script to compare origins / CDNs for HLS streams

hls_test.sh

#!/bin/bash

export path=$1
export quality=$2
export base_url_1=https://some-base.url
export base_url_2=https://some-base.url
rand_file=$(openssl rand -hex 6)


current_segment=0

fetch_playlist() {
    playlist_url="$1/${path}/${quality}/playlist.m3u8"
    segments_url="$1/${path}/${quality}"

    echo "=> Starting test [$1]"
    echo "=> Using playlist: ${playlist_url}"

    if [ ! $? = 0 ]; then
        echo "=> Forced exit: Cannot curl ${playlist}"
        exit 1
    fi

    local count=0
    local sum='0.000'

    until [ $count -eq 20 ]; do
        playlist=$(curl -s -D /tmp/${rand_file}_headers ${playlist_url})
        last_segment=$(echo ${playlist} | tail -n 1 | sed -n 's/.*\_\([0-9]*\)\.ts/\1/p')

        if [[ $last_segment == *ENDLIST* ]]; then
            echo "===> Fatal: Playlist not live!"
            exit 1
        fi

        echo "=> Last segment: ${last_segment}"
        req_time_r=$(curl -o /dev/null -s -w '%{time_total}\n' ${segments_url}/${last_segment}.ts)
        req_time=$(printf '%0.3f' $req_time_r)


        if [ -z "${last_segment}" ]; then
            echo "---> last headers: $(cat /tmp/${rand_file}_headers)"
            echo "===> Fatal: Playlist not live!"
            exit 1
        fi

        if [ "${current_segment}" -gt "${last_segment}" ]; then

            echo "===> WARNING!!! incorrect playlist detected!!! Previous segment: ${current_segment} is higher than ${last_segment}"
        fi

        let count+=1

        echo "==> Request ${count}/20"
        echo "==> Total transfer time: ${req_time}"

        sum=`echo | awk " { printf \"%0.2f\n\", (${sum} + ${req_time}); } "`
        sleep 2
    done

    avg=`echo "$sum / $count" | bc -l`
    printf "\n\nAverage response time ${1}: %0.3f s" "$avg"
}

fetch_playlist $base_url_1 &
fetch_playlist $base_url_2 &
wait