use keep alive in disk cache and user counter

src/middleware/userCounter.ts

@@ -3,12 +3,18 @@ import { Logger } from "../utils/logger";
 import { config } from "../config";
 import { getIP } from "../utils/getIP";
 import { NextFunction, Request, Response } from "express";
+import { Agent } from "http";
+
+const httpAgent = new Agent({ keepAlive: true });
 
 export function userCounter(req: Request, res: Response, next: NextFunction): void {
     if (req.method !== "OPTIONS") {
         if (Math.random() < 1 / config.userCounterRatio) {
-            axios.post(`${config.userCounterURL}/api/v1/addIP?hashedIP=${getIP(req)}`)
-                .catch(() => Logger.debug(`Failing to connect to user counter at: ${config.userCounterURL}`));
+            axios({
+                method: "post",
+                url: `${config.userCounterURL}/api/v1/addIP?hashedIP=${getIP(req)}`,
+                httpAgent
+            }).catch(() => Logger.debug(`Failing to connect to user counter at: ${config.userCounterURL}`));
         }
     }
 

src/utils/diskCache.ts

@@ -1,15 +1,23 @@
 import axios, { AxiosError } from "axios";
+import { Agent } from "http";
 import { config } from "../config";
 import { Logger } from "./logger";
 
+const httpAgent = new Agent({ keepAlive: true });
+
 class DiskCache {
     async set(key: string, value: unknown): Promise<boolean> {
         if (!config.diskCacheURL) return false;
 
         try {
-            const result = await axios.post(`${config.diskCacheURL}/api/v1/item`, {
-                key,
-                value
+            const result = await axios({
+                method: "post",
+                url: `${config.diskCacheURL}/api/v1/item`,
+                data: {
+                    key,
+                    value
+                },
+                httpAgent
             });
 
             return result.status === 200;