feat: add support for iFLYTEK Spark API (接入讯飞星火模型)

README.md

@@ -280,6 +280,9 @@ Alibaba Cloud Api Key.
 
 Alibaba Cloud Api Url.
 
+### IFLYTEK_API_KEY (Optional)
+The IFLYTEK_API_KEY is composed of the APIKey and APISecret from the iFlytek Spark Console. You need to manually concatenate the APIKey and APISecret using a colon to form the IFLYTEK_API_KEY in the format: IFLYTEK_API_KEY = {APIKey}:{APISecret}.
+
 ### `HIDE_USER_API_KEY` (optional)
 
 > Default: Empty

README_CN.md

@@ -172,6 +172,11 @@ ByteDance Api Url.
 
 阿里云（千问）Api Url.
 
+### `IFLYTEK_API_KEY` (可选)
+`IFLYTEK_API_KEY` 由讯飞星火控制台的 `APIKey` 和 `APISecret` 组成。  
+需要手动用冒号将 `APIKey` 和 `APISecret` 拼接成 `IFLYTEK_API_KEY`   
+格式为：`IFLYTEK_API_KEY` = {APIKey}:{APISecret}
+
 ### `HIDE_USER_API_KEY` （可选）
 
 如果你不想让用户自行填入 API Key，将此环境变量设置为 1 即可。

app/api/auth.ts

@@ -88,6 +88,9 @@ export function auth(req: NextRequest, modelProvider: ModelProvider) {
       case ModelProvider.Moonshot:
         systemApiKey = serverConfig.moonshotApiKey;
         break;
+      case ModelProvider.Iflytek:
+        systemApiKey = serverConfig.iflytekApiKey;
+        break;
       case ModelProvider.GPT:
       default:
         if (req.nextUrl.pathname.includes("azure/deployments")) {

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

@@ -0,0 +1,154 @@
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  Iflytek,
+  IFLYTEK_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 { isModelAvailableInServer } from "@/app/utils/model";
+import type { RequestPayload } from "@/app/client/platforms/openai";
+
+const serverConfig = getServerSideConfig();
+
+async function handle(
+  req: NextRequest,
+  { params }: { params: { path: string[] } },
+) {
+  console.log("[Iflytek Route] params ", params);
+
+  if (req.method === "OPTIONS") {
+    return NextResponse.json({ body: "OK" }, { status: 200 });
+  }
+
+  const authResult = auth(req, ModelProvider.Iflytek);
+  if (authResult.error) {
+    return NextResponse.json(authResult, {
+      status: 401,
+    });
+  }
+
+  try {
+    const response = await request(req);
+    return response;
+  } catch (e) {
+    console.error("[Iflytek] ", 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();
+
+  // iflytek use base url or just remove the path
+  let path = `${req.nextUrl.pathname}`.replaceAll(ApiPath.Iflytek, "");
+
+  let baseUrl = serverConfig.iflytekUrl || IFLYTEK_BASE_URL;
+
+  if (!baseUrl.startsWith("http")) {
+    baseUrl = `https://${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,
+  };
+
+  // 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.Iflytek as string,
+        )
+      ) {
+        return NextResponse.json(
+          {
+            error: true,
+            message: `you are not allowed to use ${jsonBody?.model} model`,
+          },
+          {
+            status: 403,
+          },
+        );
+      }
+    } catch (e) {
+      console.error(`[Iflytek] 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

@@ -14,6 +14,7 @@ import { DoubaoApi } from "./platforms/bytedance";
 import { QwenApi } from "./platforms/alibaba";
 import { HunyuanApi } from "./platforms/tencent";
 import { MoonshotApi } from "./platforms/moonshot";
+import { SparkApi } from "./platforms/iflytek";
 
 export const ROLES = ["system", "user", "assistant"] as const;
 export type MessageRole = (typeof ROLES)[number];
@@ -124,6 +125,9 @@ export class ClientApi {
       case ModelProvider.Moonshot:
         this.llm = new MoonshotApi();
         break;
+      case ModelProvider.Iflytek:
+        this.llm = new SparkApi();
+        break;
       default:
         this.llm = new ChatGPTApi();
     }
@@ -207,6 +211,7 @@ export function getHeaders() {
     const isByteDance = modelConfig.providerName === ServiceProvider.ByteDance;
     const isAlibaba = modelConfig.providerName === ServiceProvider.Alibaba;
     const isMoonshot = modelConfig.providerName === ServiceProvider.Moonshot;
+    const isIflytek = modelConfig.providerName === ServiceProvider.Iflytek;
     const isEnabledAccessControl = accessStore.enabledAccessControl();
     const apiKey = isGoogle
       ? accessStore.googleApiKey
@@ -220,6 +225,8 @@ export function getHeaders() {
       ? accessStore.alibabaApiKey
       : isMoonshot
       ? accessStore.moonshotApiKey
+      : isIflytek
+      ? accessStore.iflytekApiKey
       : accessStore.openaiApiKey;
     return {
       isGoogle,
@@ -229,6 +236,7 @@ export function getHeaders() {
       isByteDance,
       isAlibaba,
       isMoonshot,
+      isIflytek,
       apiKey,
       isEnabledAccessControl,
     };
@@ -282,6 +290,8 @@ export function getClientApi(provider: ServiceProvider): ClientApi {
       return new ClientApi(ModelProvider.Hunyuan);
     case ServiceProvider.Moonshot:
       return new ClientApi(ModelProvider.Moonshot);
+    case ServiceProvider.Iflytek:
+      return new ClientApi(ModelProvider.Iflytek);
     default:
       return new ClientApi(ModelProvider.GPT);
   }