Merge pull request ChatGPTNextWeb#5989 from bestsanmao/add_deepseek

since ChatGPTNextWeb#5984, add DeepSeek as a new ModelProvider (with deepseek-chat&deepseek-coder models), so that user can use openai and deepseek at same time with different api url & key

Author: Dogtiti

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

@@ -10,6 +10,7 @@ import { handle as alibabaHandler } from "../../alibaba";
 import { handle as moonshotHandler } from "../../moonshot";
 import { handle as stabilityHandler } from "../../stability";
 import { handle as iflytekHandler } from "../../iflytek";
+import { handle as deepseekHandler } from "../../deepseek";
 import { handle as xaiHandler } from "../../xai";
 import { handle as chatglmHandler } from "../../glm";
 import { handle as proxyHandler } from "../../proxy";
@@ -40,6 +41,8 @@ async function handle(
       return stabilityHandler(req, { params });
     case ApiPath.Iflytek:
       return iflytekHandler(req, { params });
+    case ApiPath.DeepSeek:
+      return deepseekHandler(req, { params });
     case ApiPath.XAI:
       return xaiHandler(req, { params });
     case ApiPath.ChatGLM:

app/api/auth.ts

@@ -92,6 +92,9 @@ export function auth(req: NextRequest, modelProvider: ModelProvider) {
         systemApiKey =
           serverConfig.iflytekApiKey + ":" + serverConfig.iflytekApiSecret;
         break;
+      case ModelProvider.DeepSeek:
+        systemApiKey = serverConfig.deepseekApiKey;
+        break;
       case ModelProvider.XAI:
         systemApiKey = serverConfig.xaiApiKey;
         break;

app/api/common.ts

@@ -124,7 +124,7 @@ export async function requestOpenai(req: NextRequest) {
           [
             ServiceProvider.OpenAI,
             ServiceProvider.Azure,
-            jsonBody?.model as string,  // support provider-unspecified model
+            jsonBody?.model as string, // support provider-unspecified model
           ],
         )
       ) {

app/api/deepseek.ts

@@ -0,0 +1,128 @@
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  DEEPSEEK_BASE_URL,
+  ApiPath,
+  ModelProvider,
+  ServiceProvider,
+} from "@/app/constant";
+import { prettyObject } from "@/app/utils/format";
+import { NextRequest, NextResponse } from "next/server";
+import { auth } from "@/app/api/auth";
+import { isModelNotavailableInServer } from "@/app/utils/model";
+
+const serverConfig = getServerSideConfig();
+
+export async function handle(
+  req: NextRequest,
+  { params }: { params: { path: string[] } },
+) {
+  console.log("[DeepSeek Route] params ", params);
+
+  if (req.method === "OPTIONS") {
+    return NextResponse.json({ body: "OK" }, { status: 200 });
+  }
+
+  const authResult = auth(req, ModelProvider.DeepSeek);
+  if (authResult.error) {
+    return NextResponse.json(authResult, {
+      status: 401,
+    });
+  }
+
+  try {
+    const response = await request(req);
+    return response;
+  } catch (e) {
+    console.error("[DeepSeek] ", e);
+    return NextResponse.json(prettyObject(e));
+  }
+}
+
+async function request(req: NextRequest) {
+  const controller = new AbortController();
+
+  // alibaba use base url or just remove the path
+  let path = `${req.nextUrl.pathname}`.replaceAll(ApiPath.DeepSeek, "");
+
+  let baseUrl = serverConfig.deepseekUrl || DEEPSEEK_BASE_URL;
+
+  if (!baseUrl.startsWith("http")) {
+    baseUrl = `https://${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",
+      Authorization: req.headers.get("Authorization") ?? "",
+    },
+    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 (
+        isModelNotavailableInServer(
+          serverConfig.customModels,
+          jsonBody?.model as string,
+          ServiceProvider.Moonshot as string,
+        )
+      ) {
+        return NextResponse.json(
+          {
+            error: true,
+            message: `you are not allowed to use ${jsonBody?.model} model`,
+          },
+          {
+            status: 403,
+          },
+        );
+      }
+    } catch (e) {
+      console.error(`[DeepSeek] 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

@@ -20,6 +20,7 @@ import { QwenApi } from "./platforms/alibaba";
 import { HunyuanApi } from "./platforms/tencent";
 import { MoonshotApi } from "./platforms/moonshot";
 import { SparkApi } from "./platforms/iflytek";
+import { DeepSeekApi } from "./platforms/deepseek";
 import { XAIApi } from "./platforms/xai";
 import { ChatGLMApi } from "./platforms/glm";
 
@@ -154,6 +155,9 @@ export class ClientApi {
       case ModelProvider.Iflytek:
         this.llm = new SparkApi();
         break;
+      case ModelProvider.DeepSeek:
+        this.llm = new DeepSeekApi();
+        break;
       case ModelProvider.XAI:
         this.llm = new XAIApi();
         break;
@@ -247,6 +251,7 @@ export function getHeaders(ignoreHeaders: boolean = false) {
     const isAlibaba = modelConfig.providerName === ServiceProvider.Alibaba;
     const isMoonshot = modelConfig.providerName === ServiceProvider.Moonshot;
     const isIflytek = modelConfig.providerName === ServiceProvider.Iflytek;
+    const isDeepSeek = modelConfig.providerName === ServiceProvider.DeepSeek;
     const isXAI = modelConfig.providerName === ServiceProvider.XAI;
     const isChatGLM = modelConfig.providerName === ServiceProvider.ChatGLM;
     const isEnabledAccessControl = accessStore.enabledAccessControl();
@@ -264,6 +269,8 @@ export function getHeaders(ignoreHeaders: boolean = false) {
       ? accessStore.moonshotApiKey
       : isXAI
       ? accessStore.xaiApiKey
+      : isDeepSeek
+      ? accessStore.deepseekApiKey
       : isChatGLM
       ? accessStore.chatglmApiKey
       : isIflytek
@@ -280,6 +287,7 @@ export function getHeaders(ignoreHeaders: boolean = false) {
       isAlibaba,
       isMoonshot,
       isIflytek,
+      isDeepSeek,
       isXAI,
       isChatGLM,
       apiKey,
@@ -302,6 +310,13 @@ export function getHeaders(ignoreHeaders: boolean = false) {
     isAzure,
     isAnthropic,
     isBaidu,
+    isByteDance,
+    isAlibaba,
+    isMoonshot,
+    isIflytek,
+    isDeepSeek,
+    isXAI,
+    isChatGLM,
     apiKey,
     isEnabledAccessControl,
   } = getConfig();
@@ -344,6 +359,8 @@ export function getClientApi(provider: ServiceProvider): ClientApi {
       return new ClientApi(ModelProvider.Moonshot);
     case ServiceProvider.Iflytek:
       return new ClientApi(ModelProvider.Iflytek);
+    case ServiceProvider.DeepSeek:
+      return new ClientApi(ModelProvider.DeepSeek);
     case ServiceProvider.XAI:
       return new ClientApi(ModelProvider.XAI);
     case ServiceProvider.ChatGLM: