mirror of
https://gitlab.com/openstapps/openstapps.git
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41 lines
1.4 KiB
TypeScript
41 lines
1.4 KiB
TypeScript
/*
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* Copyright (C) 2021 StApps
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import {Logger} from '@openstapps/logger';
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import express_prom_bundle from 'express-prom-bundle';
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import fs from 'fs';
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import path from 'path';
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/**
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* Create and configure a new Express Prometheus Middleware instance
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*
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* This function tries to configure the new instance with JSON read from
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* `./conf/prometheus.json`. When this fails an instance configured with
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* default options is returned.
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*
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* @returns express.Express
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*/
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export function getPrometheusMiddleware(): express_prom_bundle.Middleware {
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const configFileName = path.join('./config', 'prometheus.json');
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let options: express_prom_bundle.Opts = {};
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try {
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options = JSON.parse(fs.readFileSync(configFileName, 'utf8'));
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} catch (error) {
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Logger.warn("Couldn't get options from config file for Prometheus Middleware.", error);
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}
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return express_prom_bundle(options);
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}
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