reduce cloudflare functions build size

app/api/anthropic.ts

@@ -0,0 +1,170 @@
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  ANTHROPIC_BASE_URL,
+  Anthropic,
+  ApiPath,
+  DEFAULT_MODELS,
+  ServiceProvider,
+  ModelProvider,
+} from "@/app/constant";
+import { prettyObject } from "@/app/utils/format";
+import { NextRequest, NextResponse } from "next/server";
+import { auth } from "./auth";
+import { isModelAvailableInServer } from "@/app/utils/model";
+import { cloudflareAIGatewayUrl } from "@/app/utils/cloudflare";
+
+const ALLOWD_PATH = new Set([Anthropic.ChatPath, Anthropic.ChatPath1]);
+
+export async function handle(
+  req: NextRequest,
+  { params }: { params: { path: string[] } },
+) {
+  console.log("[Anthropic Route] params ", params);
+
+  if (req.method === "OPTIONS") {
+    return NextResponse.json({ body: "OK" }, { status: 200 });
+  }
+
+  const subpath = params.path.join("/");
+
+  if (!ALLOWD_PATH.has(subpath)) {
+    console.log("[Anthropic Route] forbidden path ", subpath);
+    return NextResponse.json(
+      {
+        error: true,
+        msg: "you are not allowed to request " + subpath,
+      },
+      {
+        status: 403,
+      },
+    );
+  }
+
+  const authResult = auth(req, ModelProvider.Claude);
+  if (authResult.error) {
+    return NextResponse.json(authResult, {
+      status: 401,
+    });
+  }
+
+  try {
+    const response = await request(req);
+    return response;
+  } catch (e) {
+    console.error("[Anthropic] ", e);
+    return NextResponse.json(prettyObject(e));
+  }
+}
+
+const serverConfig = getServerSideConfig();
+
+async function request(req: NextRequest) {
+  const controller = new AbortController();
+
+  let authHeaderName = "x-api-key";
+  let authValue =
+    req.headers.get(authHeaderName) ||
+    req.headers.get("Authorization")?.replaceAll("Bearer ", "").trim() ||
+    serverConfig.anthropicApiKey ||
+    "";
+
+  let path = `${req.nextUrl.pathname}`.replaceAll(ApiPath.Anthropic, "");
+
+  let baseUrl =
+    serverConfig.anthropicUrl || serverConfig.baseUrl || ANTHROPIC_BASE_URL;
+
+  if (!baseUrl.startsWith("http")) {
+    baseUrl = `https://${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,
+  );
+
+  // try rebuild url, when using cloudflare ai gateway in server
+  const fetchUrl = cloudflareAIGatewayUrl(`${baseUrl}${path}`);
+
+  const fetchOptions: RequestInit = {
+    headers: {
+      "Content-Type": "application/json",
+      "Cache-Control": "no-store",
+      [authHeaderName]: authValue,
+      "anthropic-version":
+        req.headers.get("anthropic-version") ||
+        serverConfig.anthropicApiVersion ||
+        Anthropic.Vision,
+    },
+    method: req.method,
+    body: req.body,
+    redirect: "manual",
+    // @ts-ignore
+    duplex: "half",
+    signal: controller.signal,
+  };
+
+  // #1815 try to refuse some request to some models
+  if (serverConfig.customModels && req.body) {
+    try {
+      const clonedBody = await req.text();
+      fetchOptions.body = clonedBody;
+
+      const jsonBody = JSON.parse(clonedBody) as { model?: string };
+
+      // not undefined and is false
+      if (
+        isModelAvailableInServer(
+          serverConfig.customModels,
+          jsonBody?.model as string,
+          ServiceProvider.Anthropic as string,
+        )
+      ) {
+        return NextResponse.json(
+          {
+            error: true,
+            message: `you are not allowed to use ${jsonBody?.model} model`,
+          },
+          {
+            status: 403,
+          },
+        );
+      }
+    } catch (e) {
+      console.error(`[Anthropic] filter`, e);
+    }
+  }
+  // console.log("[Anthropic request]", fetchOptions.headers, req.method);
+  try {
+    const res = await fetch(fetchUrl, fetchOptions);
+
+    // console.log(
+    //   "[Anthropic response]",
+    //   res.status,
+    //   "   ",
+    //   res.headers,
+    //   res.url,
+    // );
+    // 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);
+  }
+}