Feat multi models

app/api/anthropic/[...path]/route.ts

@@ -0,0 +1,189 @@
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  ANTHROPIC_BASE_URL,
+  Anthropic,
+  ApiPath,
+  DEFAULT_MODELS,
+  ModelProvider,
+} from "@/app/constant";
+import { prettyObject } from "@/app/utils/format";
+import { NextRequest, NextResponse } from "next/server";
+import { auth } from "../../auth";
+import { collectModelTable } from "@/app/utils/model";
+
+const ALLOWD_PATH = new Set([Anthropic.ChatPath, Anthropic.ChatPath1]);
+
+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));
+  }
+}
+
+export const GET = handle;
+export const POST = handle;
+
+export const runtime = "edge";
+export const preferredRegion = [
+  "arn1",
+  "bom1",
+  "cdg1",
+  "cle1",
+  "cpt1",
+  "dub1",
+  "fra1",
+  "gru1",
+  "hnd1",
+  "iad1",
+  "icn1",
+  "kix1",
+  "lhr1",
+  "pdx1",
+  "sfo1",
+  "sin1",
+  "syd1",
+];
+
+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,
+  );
+
+  const fetchUrl = `${baseUrl}${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 modelTable = collectModelTable(
+        DEFAULT_MODELS,
+        serverConfig.customModels,
+      );
+      const clonedBody = await req.text();
+      fetchOptions.body = clonedBody;
+
+      const jsonBody = JSON.parse(clonedBody) as { model?: string };
+
+      // not undefined and is false
+      if (modelTable[jsonBody?.model ?? ""].available === false) {
+        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);
+  }
+}

app/api/auth.ts

@@ -57,12 +57,31 @@ export function auth(req: NextRequest, modelProvider: ModelProvider) {
   if (!apiKey) {
     const serverConfig = getServerSideConfig();
 
-    const systemApiKey =
-      modelProvider === ModelProvider.GeminiPro
-        ? serverConfig.googleApiKey
-        : serverConfig.isAzure
-        ? serverConfig.azureApiKey
-        : serverConfig.apiKey;
+    // const systemApiKey =
+    //   modelProvider === ModelProvider.GeminiPro
+    //     ? serverConfig.googleApiKey
+    //     : serverConfig.isAzure
+    //     ? serverConfig.azureApiKey
+    //     : serverConfig.apiKey;
+
+    let systemApiKey: string | undefined;
+
+    switch (modelProvider) {
+      case ModelProvider.GeminiPro:
+        systemApiKey = serverConfig.googleApiKey;
+        break;
+      case ModelProvider.Claude:
+        systemApiKey = serverConfig.anthropicApiKey;
+        break;
+      case ModelProvider.GPT:
+      default:
+        if (serverConfig.isAzure) {
+          systemApiKey = serverConfig.azureApiKey;
+        } else {
+          systemApiKey = serverConfig.apiKey;
+        }
+    }
+
     if (systemApiKey) {
       console.log("[Auth] use system api key");
       req.headers.set("Authorization", `Bearer ${systemApiKey}`);

app/client/api.ts

@@ -8,6 +8,7 @@ import {
 import { ChatMessage, ModelType, useAccessStore, useChatStore } from "../store";
 import { ChatGPTApi } from "./platforms/openai";
 import { GeminiProApi } from "./platforms/google";
+import { ClaudeApi } from "./platforms/anthropic";
 export const ROLES = ["system", "user", "assistant"] as const;
 export type MessageRole = (typeof ROLES)[number];
 
@@ -94,11 +95,16 @@ export class ClientApi {
   public llm: LLMApi;
 
   constructor(provider: ModelProvider = ModelProvider.GPT) {
-    if (provider === ModelProvider.GeminiPro) {
-      this.llm = new GeminiProApi();
-      return;
+    switch (provider) {
+      case ModelProvider.GeminiPro:
+        this.llm = new GeminiProApi();
+        break;
+      case ModelProvider.Claude:
+        this.llm = new ClaudeApi();
+        break;
+      default:
+        this.llm = new ChatGPTApi();
     }
-    this.llm = new ChatGPTApi();
   }
 
   config() {}