@promster/express/dist/index.cjs

Express server integrations of promster

Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
//#region \0rolldown/runtime.js
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __copyProps = (to, from, except, desc) => {
	if (from && typeof from === "object" || typeof from === "function") for (var keys = __getOwnPropNames(from), i = 0, n = keys.length, key; i < n; i++) {
		key = keys[i];
		if (!__hasOwnProp.call(to, key) && key !== except) __defProp(to, key, {
			get: ((k) => from[k]).bind(null, key),
			enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable
		});
	}
	return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", {
	value: mod,
	enumerable: true
}) : target, mod));
//#endregion
let _promster_metrics = require("@promster/metrics");
let merge_options = require("merge-options");
merge_options = __toESM(merge_options, 1);
//#region src/middleware/middleware.ts
const exposeOnLocals = ({ app, key, value }) => {
	if (app?.locals) app.locals[key] = value;
};
const extractPath = (req) => req.originalUrl || req.url;
let recordRequest;
let upMetric;
const getRequestRecorder = () => recordRequest;
const signalIsUp = () => {
	if (!upMetric) return;
	for (const upMetricType of upMetric) upMetricType.set(1);
};
const signalIsNotUp = () => {
	if (!upMetric) return;
	for (const upMetricType of upMetric) upMetricType.set(0);
};
const createMiddleware = ({ app, options } = {
	app: void 0,
	options: void 0
}) => {
	const allDefaultedOptions = (0, merge_options.default)(_promster_metrics.createHttpMetrics.defaultOptions, _promster_metrics.createGcMetrics.defaultOptions, _promster_metrics.createRequestRecorder.defaultOptions, _promster_metrics.createGcObserver.defaultOptions, _promster_metrics.defaultNormalizers, options);
	const shouldSkipMetricsByEnvironment = (0, _promster_metrics.skipMetricsInEnvironment)(allDefaultedOptions);
	const httpMetrics = (0, _promster_metrics.createHttpMetrics)(allDefaultedOptions);
	const gcMetrics = (0, _promster_metrics.createGcMetrics)(allDefaultedOptions);
	const observeGc = (0, _promster_metrics.createGcObserver)(gcMetrics, allDefaultedOptions);
	recordRequest = (0, _promster_metrics.createRequestRecorder)(httpMetrics, allDefaultedOptions);
	upMetric = gcMetrics?.up;
	exposeOnLocals({
		app,
		key: "Prometheus",
		value: _promster_metrics.Prometheus
	});
	exposeOnLocals({
		app,
		key: "recordRequest",
		value: recordRequest
	});
	if (!shouldSkipMetricsByEnvironment) observeGc();
	signalIsUp();
	return (request, response, next) => {
		const requestTiming = _promster_metrics.timing.start();
		response.on("finish", () => {
			const labels = Object.assign({}, {
				method: allDefaultedOptions.normalizeMethod(request.method, {
					req: request,
					res: response
				}),
				status_code: allDefaultedOptions.normalizeStatusCode(response.statusCode, {
					req: request,
					res: response
				}),
				path: allDefaultedOptions.normalizePath(extractPath(request), {
					req: request,
					res: response
				})
			}, allDefaultedOptions.getLabelValues?.(request, response));
			const shouldSkipByRequest = allDefaultedOptions.skip?.(request, response, labels);
			const requestContentLength = Number(request.headers["content-length"] ?? 0);
			const responseContentLength = Number(response.getHeader("content-length") ?? 0);
			if (!shouldSkipByRequest && !shouldSkipMetricsByEnvironment) recordRequest(requestTiming, {
				labels,
				requestContentLength,
				responseContentLength
			});
		});
		next();
	};
};
//#endregion
exports.Prometheus = _promster_metrics.Prometheus;
exports.createMiddleware = createMiddleware;
exports.defaultNormalizers = _promster_metrics.defaultNormalizers;
exports.defaultRegister = _promster_metrics.defaultRegister;
exports.getContentType = _promster_metrics.getContentType;
exports.getRequestRecorder = getRequestRecorder;
exports.getSummary = _promster_metrics.getSummary;
exports.signalIsNotUp = signalIsNotUp;
exports.signalIsUp = signalIsUp;
exports.timing = _promster_metrics.timing;

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