reduce cloudflare functions build size

app/api/google.ts

@@ -0,0 +1,134 @@
+import { NextRequest, NextResponse } from "next/server";
+import { auth } from "./auth";
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  ApiPath,
+  GEMINI_BASE_URL,
+  Google,
+  ModelProvider,
+} from "@/app/constant";
+import { prettyObject } from "@/app/utils/format";
+
+const serverConfig = getServerSideConfig();
+
+export async function handle(
+  req: NextRequest,
+  { params }: { params: { provider: string; path: string[] } },
+) {
+  console.log("[Google Route] params ", params);
+
+  if (req.method === "OPTIONS") {
+    return NextResponse.json({ body: "OK" }, { status: 200 });
+  }
+
+  const authResult = auth(req, ModelProvider.GeminiPro);
+  if (authResult.error) {
+    return NextResponse.json(authResult, {
+      status: 401,
+    });
+  }
+
+  const bearToken = req.headers.get("Authorization") ?? "";
+  const token = bearToken.trim().replaceAll("Bearer ", "").trim();
+
+  const apiKey = token ? token : serverConfig.googleApiKey;
+
+  if (!apiKey) {
+    return NextResponse.json(
+      {
+        error: true,
+        message: `missing GOOGLE_API_KEY in server env vars`,
+      },
+      {
+        status: 401,
+      },
+    );
+  }
+  try {
+    const response = await request(req, apiKey);
+    return response;
+  } catch (e) {
+    console.error("[Google] ", e);
+    return NextResponse.json(prettyObject(e));
+  }
+}
+
+export const GET = handle;
+export const POST = handle;
+
+export const runtime = "edge";
+export const preferredRegion = [
+  "bom1",
+  "cle1",
+  "cpt1",
+  "gru1",
+  "hnd1",
+  "iad1",
+  "icn1",
+  "kix1",
+  "pdx1",
+  "sfo1",
+  "sin1",
+  "syd1",
+];
+
+async function request(req: NextRequest, apiKey: string) {
+  const controller = new AbortController();
+
+  let baseUrl = serverConfig.googleUrl || GEMINI_BASE_URL;
+
+  let path = `${req.nextUrl.pathname}`.replaceAll(ApiPath.Google, "");
+
+  if (!baseUrl.startsWith("http")) {
+    baseUrl = `https://${baseUrl}`;
+  }
+
+  if (baseUrl.endsWith("/")) {
+    baseUrl = baseUrl.slice(0, -1);
+  }
+
+  console.log("[Proxy] ", path);
+  console.log("[Base Url]", baseUrl);
+
+  const timeoutId = setTimeout(
+    () => {
+      controller.abort();
+    },
+    10 * 60 * 1000,
+  );
+  const fetchUrl = `${baseUrl}${path}?key=${apiKey}${
+    req?.nextUrl?.searchParams?.get("alt") === "sse" ? "&alt=sse" : ""
+  }`;
+
+  console.log("[Fetch Url] ", fetchUrl);
+  const fetchOptions: RequestInit = {
+    headers: {
+      "Content-Type": "application/json",
+      "Cache-Control": "no-store",
+    },
+    method: req.method,
+    body: req.body,
+    // to fix #2485: https://stackoverflow.com/questions/55920957/cloudflare-worker-typeerror-one-time-use-body
+    redirect: "manual",
+    // @ts-ignore
+    duplex: "half",
+    signal: controller.signal,
+  };
+
+  try {
+    const res = await fetch(fetchUrl, fetchOptions);
+    // to prevent browser prompt for credentials
+    const newHeaders = new Headers(res.headers);
+    newHeaders.delete("www-authenticate");
+    // to disable nginx buffering
+    newHeaders.set("X-Accel-Buffering", "no");
+
+    return new Response(res.body, {
+      status: res.status,
+      statusText: res.statusText,
+      headers: newHeaders,
+    });
+  } finally {
+    clearTimeout(timeoutId);
+  }
+}