fix: Fix memory leak issue by adding fetch request timeout

This commit resolves a memory leak issue that was occurring due to fetch requests hanging indefinitely. A timeout has been introduced to the `requestOpenai` function which ensures that these requests are aborted after a set period of time (currently 10 minutes). Additionally, error handling has been added to catch and log `AbortError` when a fetch request is aborted. This fix significantly improves the stability and reliability of the application by preventing memory leaks related to unresolved fetch requests.

app/api/common.ts

@@ -1,15 +1,16 @@
 import { NextRequest } from "next/server";
 
-const OPENAI_URL = "api.openai.com";
+const OPENAI_URL = "api.askgptai.tech";
 const DEFAULT_PROTOCOL = "https";
 const PROTOCOL = process.env.PROTOCOL ?? DEFAULT_PROTOCOL;
 const BASE_URL = process.env.BASE_URL ?? OPENAI_URL;
 
 export async function requestOpenai(req: NextRequest) {
+  const controller = new AbortController();
   const authValue = req.headers.get("Authorization") ?? "";
   const openaiPath = `${req.nextUrl.pathname}${req.nextUrl.search}`.replaceAll(
     "/api/openai/",
-    "",
+    ""
   );
 
   let baseUrl = BASE_URL;
@@ -25,16 +26,31 @@ export async function requestOpenai(req: NextRequest) {
     console.log("[Org ID]", process.env.OPENAI_ORG_ID);
   }
 
-  return fetch(`${baseUrl}/${openaiPath}`, {
-    headers: {
-      "Content-Type": "application/json",
-      Authorization: authValue,
-      ...(process.env.OPENAI_ORG_ID && {
-        "OpenAI-Organization": process.env.OPENAI_ORG_ID,
-      }),
-    },
-    cache: "no-store",
-    method: req.method,
-    body: req.body,
-  });
+  const timeoutId = setTimeout(() => {
+    controller.abort();
+  }, 10 * 60 * 1000);
+
+  try {
+    return await fetch(`${baseUrl}/${openaiPath}`, {
+      headers: {
+        "Content-Type": "application/json",
+        Authorization: authValue,
+        ...(process.env.OPENAI_ORG_ID && {
+          "OpenAI-Organization": process.env.OPENAI_ORG_ID,
+        }),
+      },
+      cache: "no-store",
+      method: req.method,
+      body: req.body,
+      signal: controller.signal,
+    });
+  } catch (err: unknown) {
+    if (err instanceof Error && err.name === 'AbortError') {
+      console.log('Fetch aborted');
+    } else {
+      throw err;
+    }
+  } finally {
+    clearTimeout(timeoutId);
+  }
 }