f5-conx-core/dist/httpTimer.js

F5 SDK for JavaScript with Typescript type definitions

"use strict";
/* eslint-disable @typescript-eslint/no-non-null-assertion */
Object.defineProperty(exports, "__esModule", { value: true });
exports.httpTimer = void 0;
/**
 * basically a copy/paste from https://github.com/szmarczak/http-timer
 *
 * the latest version was pure ESM which was causing problem with this project.
 *  so, I had to rework some of it's moduleness to match the blend this project has/needs
 */
const events_1 = require("events");
const util_1 = require("util");
function httpTimer(request) {
    if (request.timings) {
        return request.timings;
    }
    const timings = {
        start: Date.now(),
        socket: undefined,
        lookup: undefined,
        connect: undefined,
        secureConnect: undefined,
        upload: undefined,
        response: undefined,
        end: undefined,
        error: undefined,
        abort: undefined,
        phases: {
            wait: undefined,
            dns: undefined,
            tcp: undefined,
            tls: undefined,
            request: undefined,
            firstByte: undefined,
            download: undefined,
            total: undefined,
        },
    };
    request.timings = timings;
    function handleError(origin) {
        origin.once(events_1.errorMonitor, () => {
            timings.error = Date.now();
            timings.phases.total = timings.error - timings.start;
        });
    }
    handleError(request);
    function onAbort() {
        timings.abort = Date.now();
        timings.phases.total = timings.abort - timings.start;
    }
    request.prependOnceListener('abort', onAbort);
    function onSocket(socket) {
        timings.socket = Date.now();
        timings.phases.wait = timings.socket - timings.start;
        if (util_1.types.isProxy(socket)) {
            return;
        }
        const lookupListener = () => {
            timings.lookup = Date.now();
            timings.phases.dns = timings.lookup - timings.socket;
        };
        socket.prependOnceListener('lookup', lookupListener);
        deferToConnect(socket, {
            connect: () => {
                timings.connect = Date.now();
                if (timings.lookup === undefined) {
                    socket.removeListener('lookup', lookupListener);
                    timings.lookup = timings.connect;
                    timings.phases.dns = timings.lookup - timings.socket;
                }
                timings.phases.tcp = timings.connect - timings.lookup;
            },
            secureConnect: () => {
                timings.secureConnect = Date.now();
                timings.phases.tls = timings.secureConnect - timings.connect;
            },
        });
    }
    if (request.socket) {
        onSocket(request.socket);
    }
    else {
        request.prependOnceListener('socket', onSocket);
    }
    function onUpload() {
        var _a;
        timings.upload = Date.now();
        timings.phases.request = timings.upload - ((_a = timings.secureConnect) !== null && _a !== void 0 ? _a : timings.connect);
    }
    if (request.writableFinished) {
        onUpload();
    }
    else {
        request.prependOnceListener('finish', onUpload);
    }
    request.prependOnceListener('response', (response) => {
        timings.response = Date.now();
        timings.phases.firstByte = timings.response - timings.upload;
        response.timings = timings;
        handleError(response);
        response.prependOnceListener('end', () => {
            request.off('abort', onAbort);
            response.off('aborted', onAbort);
            if (timings.phases.total) {
                // Aborted or errored
                return;
            }
            timings.end = Date.now();
            timings.phases.download = timings.end - timings.response;
            timings.phases.total = timings.end - timings.start;
        });
        response.prependOnceListener('aborted', onAbort);
    });
    return timings;
}
exports.httpTimer = httpTimer;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function isTLSSocket(socket) {
    return socket.encrypted;
}
function deferToConnect(socket, fn) {
    let listeners;
    if (typeof fn === 'function') {
        const connect = fn;
        listeners = { connect };
    }
    else {
        listeners = fn;
    }
    const hasConnectListener = typeof listeners.connect === 'function';
    const hasSecureConnectListener = typeof listeners.secureConnect === 'function';
    const hasCloseListener = typeof listeners.close === 'function';
    function onConnect() {
        if (hasConnectListener) {
            listeners.connect();
        }
        if (isTLSSocket(socket) && hasSecureConnectListener) {
            if (socket.authorized) {
                listeners.secureConnect();
            }
            else if (!socket.authorizationError) {
                socket.once('secureConnect', listeners.secureConnect);
            }
        }
        if (hasCloseListener) {
            socket.once('close', listeners.close);
        }
    }
    if (socket.writable && !socket.connecting) {
        onConnect();
    }
    else if (socket.connecting) {
        socket.once('connect', onConnect);
    }
    else if (socket.destroyed && hasCloseListener) {
        listeners.close(socket._hadError);
    }
}
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