88 lines
2.3 KiB
TypeScript
88 lines
2.3 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import type {HonoEnv} from '@fluxer/api/src/types/HonoEnv';
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import {recordCounter, recordHistogram} from '@fluxer/telemetry/src/Metrics';
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import {createMiddleware} from 'hono/factory';
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function normalizePath(path: string): string {
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return path
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.replace(/\/\d{17,20}/g, '/:id')
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.replace(/\/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}/gi, '/:uuid')
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.replace(/\/[A-Za-z0-9_-]{6,}/g, (match) => {
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if (match.match(/^\/[0-9]+$/)) {
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return '/:id';
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}
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return match;
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});
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}
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export const MetricsMiddleware = createMiddleware<HonoEnv>(async (ctx, next) => {
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const start = performance.now();
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const method = ctx.req.method;
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const path = new URL(ctx.req.url).pathname;
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try {
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await next();
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} finally {
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const durationMs = performance.now() - start;
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const normalizedPath = normalizePath(path);
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const status = ctx.res.status;
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const baseDimensions = {
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'http.request.method': method,
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'url.path': normalizedPath,
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'http.response.status_code': String(status),
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};
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recordHistogram({
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name: 'http.server.request.duration',
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dimensions: baseDimensions,
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valueMs: durationMs,
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});
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recordCounter({
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name: 'http.server.request.count',
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dimensions: baseDimensions,
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value: 1,
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});
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recordHistogram({
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name: 'api.latency',
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dimensions: {
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method,
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path: normalizedPath,
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status: String(status),
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},
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valueMs: durationMs,
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});
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const counterName = status >= 500 ? 'api.request.5xx' : status >= 400 ? 'api.request.4xx' : 'api.request.2xx';
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recordCounter({
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name: counterName,
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dimensions: {
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method,
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path: normalizedPath,
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status: String(status),
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},
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value: 1,
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});
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}
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});
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