feat: support baidu model

.gitignore

@@ -43,4 +43,4 @@ dev
 .env
 
 *.key
-*.key.pub
+*.key.pub

app/api/auth.ts

@@ -73,6 +73,9 @@ export function auth(req: NextRequest, modelProvider: ModelProvider) {
       case ModelProvider.Claude:
         systemApiKey = serverConfig.anthropicApiKey;
         break;
+      case ModelProvider.Ernie:
+        systemApiKey = serverConfig.baiduApiKey;
+        break;
       case ModelProvider.GPT:
       default:
         if (req.nextUrl.pathname.includes("azure/deployments")) {

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

@@ -0,0 +1,169 @@
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  BAIDU_BASE_URL,
+  ApiPath,
+  ModelProvider,
+  BAIDU_OATUH_URL,
+  ServiceProvider,
+} from "@/app/constant";
+import { prettyObject } from "@/app/utils/format";
+import { NextRequest, NextResponse } from "next/server";
+import { auth } from "@/app/api/auth";
+import { isModelAvailableInServer } from "@/app/utils/model";
+import { getAccessToken } from "@/app/utils/baidu";
+
+const serverConfig = getServerSideConfig();
+
+async function handle(
+  req: NextRequest,
+  { params }: { params: { path: string[] } },
+) {
+  console.log("[Baidu Route] params ", params);
+
+  if (req.method === "OPTIONS") {
+    return NextResponse.json({ body: "OK" }, { status: 200 });
+  }
+
+  const authResult = auth(req, ModelProvider.Ernie);
+  if (authResult.error) {
+    return NextResponse.json(authResult, {
+      status: 401,
+    });
+  }
+
+  if (!serverConfig.baiduApiKey || !serverConfig.baiduSecretKey) {
+    return NextResponse.json(
+      {
+        error: true,
+        message: `missing BAIDU_API_KEY or BAIDU_SECRET_KEY in server env vars`,
+      },
+      {
+        status: 401,
+      },
+    );
+  }
+
+  try {
+    const response = await request(req);
+    return response;
+  } catch (e) {
+    console.error("[Baidu] ", 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",
+];
+
+async function request(req: NextRequest) {
+  const controller = new AbortController();
+
+  let path = `${req.nextUrl.pathname}`.replaceAll(ApiPath.Baidu, "");
+
+  let baseUrl = serverConfig.baiduUrl || BAIDU_BASE_URL;
+
+  if (!baseUrl.startsWith("http")) {
+    baseUrl = `https://${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 { access_token } = await getAccessToken(
+    serverConfig.baiduApiKey,
+    serverConfig.baiduSecretKey,
+  );
+  const fetchUrl = `${baseUrl}${path}?access_token=${access_token}`;
+
+  const fetchOptions: RequestInit = {
+    headers: {
+      "Content-Type": "application/json",
+    },
+    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.Baidu as string,
+        )
+      ) {
+        return NextResponse.json(
+          {
+            error: true,
+            message: `you are not allowed to use ${jsonBody?.model} model`,
+          },
+          {
+            status: 403,
+          },
+        );
+      }
+    } catch (e) {
+      console.error(`[Baidu] filter`, e);
+    }
+  }
+  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);
+  }
+}

app/client/api.ts

@@ -9,6 +9,8 @@ import { ChatMessage, ModelType, useAccessStore, useChatStore } from "../store";
 import { ChatGPTApi } from "./platforms/openai";
 import { GeminiProApi } from "./platforms/google";
 import { ClaudeApi } from "./platforms/anthropic";
+import { ErnieApi } from "./platforms/baidu";
+
 export const ROLES = ["system", "user", "assistant"] as const;
 export type MessageRole = (typeof ROLES)[number];
 
@@ -104,6 +106,9 @@ export class ClientApi {
       case ModelProvider.Claude:
         this.llm = new ClaudeApi();
         break;
+      case ModelProvider.Ernie:
+        this.llm = new ErnieApi();
+        break;
       default:
         this.llm = new ChatGPTApi();
     }
@@ -220,6 +225,8 @@ export function getClientApi(provider: ServiceProvider): ClientApi {
       return new ClientApi(ModelProvider.GeminiPro);
     case ServiceProvider.Anthropic:
       return new ClientApi(ModelProvider.Claude);
+    case ServiceProvider.Baidu:
+      return new ClientApi(ModelProvider.Ernie);
     default:
       return new ClientApi(ModelProvider.GPT);
   }