@elastic/synthetics/dist/network-timings.js

Elastic synthetic monitoring agent

"use strict";
/**
 * MIT License
 *
 * Copyright (c) 2020-present, Elastic NV
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.calcTotalTime = exports.getResourceTimings = exports.firstPositive = exports.roundMilliSecs = void 0;
const roundMilliSecs = (value) => {
    return Math.floor(value * 1000) / 1000;
};
exports.roundMilliSecs = roundMilliSecs;
/**
 * First positive number in the list, used to derive the `blocked` phase from
 * whichever Resource Timing marker fired first.
 */
const firstPositive = (numbers) => {
    for (let i = 0; i < numbers.length; ++i) {
        if (numbers[i] > 0) {
            return numbers[i];
        }
    }
    return null;
};
exports.firstPositive = firstPositive;
/**
 * Maps a Playwright Resource Timing object into the per-phase `NetworkInfo`
 * timings. `total` is left at `-1` for the caller to fill via `calcTotalTime`
 * once `loadEndTime`/`requestSentTime` are known. `receive` resolves to `-1`
 * until `responseEnd` is available (browser journeys learn it on
 * `requestfinished`); API journeys have the full timing up front.
 */
function getResourceTimings(rtiming) {
    const blocked = (0, exports.roundMilliSecs)((0, exports.firstPositive)([
        rtiming.domainLookupStart,
        rtiming.connectStart,
        rtiming.requestStart,
    ])) || -1;
    const dns = rtiming.domainLookupEnd !== -1
        ? (0, exports.roundMilliSecs)(rtiming.domainLookupEnd - rtiming.domainLookupStart)
        : -1;
    const connect = rtiming.connectEnd !== -1
        ? (0, exports.roundMilliSecs)(rtiming.connectEnd - rtiming.connectStart)
        : -1;
    const ssl = rtiming.secureConnectionStart !== -1
        ? (0, exports.roundMilliSecs)(rtiming.connectEnd - rtiming.secureConnectionStart)
        : -1;
    const wait = rtiming.responseStart !== -1
        ? (0, exports.roundMilliSecs)(rtiming.responseStart - rtiming.requestStart)
        : -1;
    const receive = rtiming.responseEnd !== -1
        ? (0, exports.roundMilliSecs)(rtiming.responseEnd - rtiming.responseStart)
        : -1;
    return {
        blocked,
        dns,
        ssl,
        connect,
        send: 0,
        wait,
        receive,
        total: -1,
    };
}
exports.getResourceTimings = getResourceTimings;
/**
 * Returns the `total` phase by summing the positive phases. Falls back to the
 * wall-clock span between `requestSentTime` and `loadEndTime` when Resource
 * Timing data is unavailable (`startTime <= 0`, e.g. HAR replay or aborted
 * requests). Pure — the caller assigns the result onto `timings.total`.
 */
function calcTotalTime(entry, rtiming) {
    if (rtiming.startTime <= 0) {
        const end = entry.loadEndTime || entry.responseReceivedTime || entry.requestSentTime;
        const total = (0, exports.roundMilliSecs)((end - entry.requestSentTime) * 1000);
        return total <= 0 ? -1 : total;
    }
    const { timings } = entry;
    return [
        timings.blocked,
        timings.dns,
        timings.connect,
        timings.wait,
        timings.receive,
    ].reduce((pre, cur) => ((cur || -1) > 0 ? cur + pre : pre), 0);
}
exports.calcTotalTime = calcTotalTime;
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