aljaz/ditto
1
0
Fork 0
mirror of https://github.com/aljazceru/ditto.git synced 2026-02-21 13:05:50 +01:00
Code Issues Packages Projects Releases Wiki Activity

Record HTTP response time metrics

Browse Source
This commit is contained in:
Alex Gleason
2024-10-10 13:20:03 -05:00
parent df8004e261
commit 81c28825a8
4 changed files with 22 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/middleware/metricsMiddleware.ts
View File

@@ -1,9 +1,14 @@
import { ScopedPerformance } from '@esroyo/scoped-performance';
import { MiddlewareHandler } from '@hono/hono';
import { httpRequestsCounter, httpResponsesCounter } from '@/metrics.ts';
import { httpRequestsCounter, httpResponseDurationHistogram, httpResponsesCounter } from '@/metrics.ts';
/** Prometheus metrics middleware that tracks HTTP requests by methods and responses by status code. */
export const metricsMiddleware: MiddlewareHandler = async (c, next) => {
// Start a timer to measure the duration of the response.
using perf = new ScopedPerformance();
perf.mark('start');
// HTTP Request.
const { method } = c.req;
httpRequestsCounter.inc({ method });
@@ -17,4 +22,8 @@ export const metricsMiddleware: MiddlewareHandler = async (c, next) => {
// Tries to find actual route names first before falling back on potential middleware handlers like `app.use('*')`.
const path = c.req.matchedRoutes.find((r) => r.method !== 'ALL')?.path ?? c.req.routePath;
httpResponsesCounter.inc({ method, status, path });
// Measure the duration of the response.
const { duration } = perf.measure('total', 'start');
httpResponseDurationHistogram.observe({ method, status, path }, duration / 1000);
};