add metrics on api functions

Author: JosiasAurel

metrics.ts

@@ -0,0 +1,19 @@
+import { StatsD } from "node-statsd";
+import { config } from "dotenv";
+
+config(); // load env vars
+
+const environment = process.env.NODE_ENV;
+const graphite = process.env.GRAPHITE_HOST;
+
+if (graphite === null) throw new Error("Graphite host is not configured");
+
+const options = {	
+	host: graphite,
+	port: 8125,
+	prefix: `${environment}.sprig.`
+};
+
+const metrics = new StatsD(options);
+
+export default metrics;

package.json

@@ -23,11 +23,13 @@
 		"@lezer/common": "^1.0.2",
 		"@preact/signals": "^1.1.3",
 		"@sendgrid/mail": "^7.7.0",
-		"astro": "^2.0.4",
+		"astro": "2.7.0",
+		"dotenv": "^16.3.1",
 		"esprima": "^4.0.1",
-		"firebase-admin": "^11.5.0",
+		"firebase-admin": "^11.10.1",
 		"ms": "^2.1.3",
 		"nanoid": "^4.0.1",
+		"node-statsd": "^0.1.1",
 		"preact": "^10.6.5",
 		"react-icons": "^4.7.1",
 		"rehype-external-links": "^2.0.1",

src/env.d.ts

@@ -1,3 +1,4 @@
+/// <reference path="../.astro/types.d.ts" />
 /// <reference types="astro/client" />
 
 interface ImportMetaEnv {

src/middleware.ts

@@ -0,0 +1,14 @@
+import metrics from "../metrics";
+
+export async function onRequest({ request }: any, next: () => any) {
+	const url = request.url;
+
+	if (!url.includes("api")) return next();
+
+	const metricName = url.split("/").slice(3).join("_");
+	const response = await next();
+
+	const metricKey = `${response.status}.${metricName}`;
+	console.log(metricKey);
+	metrics.increment(metricKey, 1);
+}