http_trace.sh

#!/usr/bin/env bash

AVG_COUNT="${AVG_COUNT:-10}"
FACTOR="${FACTOR:-2}"
LOOPTIME="${LOOPTIME:-1}"
FULL_URL="${1}"
SNI="$(printf '%s' ${FULL_URL} | awk -F[/:] '{print $4}')"
TARGETS=($(dig +short ${SNI}))
export AVG_COUNT FACTOR LOOPTIME TARGETS

set -CETbfupo pipefail

function _timestamp() {
    date --utc +%FT%T.%3NZ
}
export -f _timestamp

function w8() {
    for p in "${@}";
    do
        wait -n "${p}" 2> /dev/null &
    done;
    wait -n
}

function _j() {
    set +u
    TODO="${1}";
    TARGETs=(${@:2});
    pids=();
    for j in "${TARGETs[@]}";
    do
        pids+=($!);
        eval "${TODO} ${j}" &
    done;
    w8 "${pids[@]}"
    set -u
}

function _curl() {
    printf '%s|%s\n' $(curl -kso /dev/null --write-out "%{time_connect}|%{time_appconnect}|%{time_pretransfer}|%{time_starttransfer}|%{time_redirect}|%{time_total}" "${1}") "${2}"
}
export -f _curl

function _math() {
    printf '%s\n' "$@" | bc
}


function mkAvg() {
    local t=0;
    local vals=(${@});
    [[ -z ${vals[@]} ]] && vals[0]=1;
    for v in ${vals[@]};
    do
        t=$((t + v));
    done;
    printf '%d' $(_math "$t / ${#vals[@]}")
}

function _main() {
    _report_file=$(mktemp);
    printf 'tCONNECT\ttAPPCONNECT\ttPRETX\t\ttSTARTTX\ttREDIRECT\ttTOTAL\t\tIP\t\t\t\tHIGH\n' | tee -a "${_report_file}";
    trap 'printf "\n\n"; cat ${_report_file}; mv -vf ${_report_file} ./$(_timestamp).${1}.log' EXIT;
    avgCounter=0;
    while :; do
        _j "_curl ${1}" "${@:2}";
        sleep "${LOOPTIME}";
    done | while IFS="|" read CONNECT APPCONNECT PRETX STARTTX REDIR TOTAL IP; do
        out=$(printf '%s\t%s\t%s\t%s\t%s\t%s\t%s' "${CONNECT}" "${APPCONNECT}" "${PRETX}" "${STARTTX}" "${REDIR}" "${TOTAL}" "${IP}");
        printf '%s\n' "${out}" > /dev/stderr;
        for val in ${!avgHT[@]};
        do
            picoVal=$(eval echo "\${${val}//.}" | sed 's/^0*//');
            picoVal="${picoVal:-0}";
            ((avgCounter++));
            lastX[${avgCounter}]="${picoVal}";
            avgHT[$val]=$(mkAvg "${lastX[@]}");
            oldAvg=$(mkAvg "${lastX[@]:$((avgCounter - 1))}");
            if [[ $(_math "${picoVal} / ${FACTOR:-2}") -gt "${oldAvg}" ]] && [[ "${picoVal}" -gt $(_math "${avgHT[$val]} - ${oldAvg}") ]]; then
                printf '%s\t[%s]\t%d\t%s\n' "${out}" "${val}" "${picoVal}" "$(_timestamp)" | tee -a "${_report_file}";
            fi;
        done;
        [[ "${avgCounter}" -gt "${AVG_COUNT}" ]] && avgCounter=0;
    done
}

export -a lastX;

typeset -A avgHT;
avgHT=([CONNECT]=0 [APPCONNECT]=0 [PRETX]=0 [STARTTX]=0 [REDIR]=0 [TOTAL]=0);
export avgHT;

#for a in ${!avgHT[@]}; do
#       export -a "last${a}"
#done

_main ${FULL_URL} ${TARGETS[@]}