添加 OpenRouter 作为 LLM 服务提供商

.env.template

@@ -81,3 +81,9 @@ SILICONFLOW_API_KEY=
 
 ### siliconflow Api url (optional)
 SILICONFLOW_URL=
+
+### openrouter Api key (optional)
+OPENROUTER_API_KEY=
+
+### openrouter Api url (optional)
+OPENROUTER_URL=

README.md

@@ -311,6 +311,9 @@ To control custom models, use `+` to add a custom model, use `-` to hide a model
 
 User `-all` to disable all default models, `+all` to enable all default models.
 
+Models from OpenRouter (except `openrouter/auto`) need to be configured manually, use `+provider/model@OpenRouter`.
+> Example: `+qwen/qwen3-32b:free@OpenRouter` will show `qwen/qwen3-32b:free(OpenRouter)` in model list.
+
 For Azure: use `modelName@Azure=deploymentName` to customize model name and deployment name.
 > Example: `+gpt-3.5-turbo@Azure=gpt35` will show option `gpt35(Azure)` in model list.
 > If you only can use Azure model, `-all,+gpt-3.5-turbo@Azure=gpt35` will `gpt35(Azure)` the only option in model list.
@@ -361,6 +364,14 @@ SiliconFlow API Key.
 
 SiliconFlow API URL.
 
+### `OPENROUTER_API_KEY` (optional)
+
+OpenRouter API Key.
+
+### `OPENROUTER_URL` (optional)
+
+OpenRouter API URL.
+
 ## Requirements
 
 NodeJS >= 18, Docker >= 20

README_CN.md

@@ -232,6 +232,9 @@ DeepSeek Api Url.
 
 用来控制模型列表，使用 `+` 增加一个模型，使用 `-` 来隐藏一个模型，使用 `模型名=展示名` 来自定义模型的展示名，用英文逗号隔开。
 
+OpenRouter 提供的模型（除 `openrouter/auto` 外）需要手动配置，使用 `+provider/model@OpenRouter`。
+> 示例：`+qwen/qwen3-32b:free@OpenRouter` 这个配置会在模型列表显示一个 `qwen/qwen3-32b:free(OpenRouter)` 的选项。
+
 在Azure的模式下，支持使用`modelName@Azure=deploymentName`的方式配置模型名称和部署名称(deploy-name)
 > 示例：`+gpt-3.5-turbo@Azure=gpt35`这个配置会在模型列表显示一个`gpt35(Azure)`的选项。
 > 如果你只能使用Azure模式，那么设置 `-all,+gpt-3.5-turbo@Azure=gpt35` 则可以让对话的默认使用 `gpt35(Azure)`
@@ -275,6 +278,14 @@ SiliconFlow API Key.
 
 SiliconFlow API URL.
 
+### `OPENROUTER_API_KEY` (optional)
+
+OpenRouter API Key.
+
+### `OPENROUTER_URL` (optional)
+
+OpenRouter API URL.
+
 ## 开发
 
 点击下方按钮，开始二次开发：

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

@@ -15,6 +15,7 @@ import { handle as siliconflowHandler } from "../../siliconflow";
 import { handle as xaiHandler } from "../../xai";
 import { handle as chatglmHandler } from "../../glm";
 import { handle as proxyHandler } from "../../proxy";
+import { handle as openrouterHandler } from "../../openrouter";
 
 async function handle(
   req: NextRequest,
@@ -50,6 +51,8 @@ async function handle(
       return chatglmHandler(req, { params });
     case ApiPath.SiliconFlow:
       return siliconflowHandler(req, { params });
+    case ApiPath.OpenRouter:
+      return openrouterHandler(req, { params });
     case ApiPath.OpenAI:
       return openaiHandler(req, { params });
     default:

app/api/auth.ts

@@ -104,6 +104,9 @@ export function auth(req: NextRequest, modelProvider: ModelProvider) {
       case ModelProvider.SiliconFlow:
         systemApiKey = serverConfig.siliconFlowApiKey;
         break;
+      case ModelProvider.OpenRouter:
+        systemApiKey = serverConfig.openrouterApiKey;
+        break;
       case ModelProvider.GPT:
       default:
         if (req.nextUrl.pathname.includes("azure/deployments")) {

app/api/openrouter.ts

@@ -0,0 +1,128 @@
+import { getServerSideConfig } from "@/app/config/server";
+import {
+  OPENROUTER_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("[OpenRouter Route] params ", params);
+
+  if (req.method === "OPTIONS") {
+    return NextResponse.json({ body: "OK" }, { status: 200 });
+  }
+
+  const authResult = auth(req, ModelProvider.OpenRouter);
+  if (authResult.error) {
+    return NextResponse.json(authResult, {
+      status: 401,
+    });
+  }
+
+  try {
+    const response = await request(req);
+    return response;
+  } catch (e) {
+    console.error("[OpenRouter] ", 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 = `${req.nextUrl.pathname}`.replaceAll(ApiPath.OpenRouter, "");
+
+  let baseUrl = serverConfig.openrouterUrl || OPENROUTER_BASE_URL;
+
+  if (!baseUrl.startsWith("http")) {
+    baseUrl = `https://${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.OpenRouter as string,
+        )
+      ) {
+        return NextResponse.json(
+          {
+            error: true,
+            message: `you are not allowed to use ${jsonBody?.model} model`,
+          },
+          {
+            status: 403,
+          },
+        );
+      }
+    } catch (e) {
+      console.error(`[OpenRouter] 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

@@ -24,6 +24,7 @@ import { DeepSeekApi } from "./platforms/deepseek";
 import { XAIApi } from "./platforms/xai";
 import { ChatGLMApi } from "./platforms/glm";
 import { SiliconflowApi } from "./platforms/siliconflow";
+import { OpenRouterApi } from "./platforms/openrouter";
 
 export const ROLES = ["system", "user", "assistant"] as const;
 export type MessageRole = (typeof ROLES)[number];
@@ -173,6 +174,9 @@ export class ClientApi {
       case ModelProvider.SiliconFlow:
         this.llm = new SiliconflowApi();
         break;
+      case ModelProvider.OpenRouter:
+        this.llm = new OpenRouterApi();
+        break;
       default:
         this.llm = new ChatGPTApi();
     }
@@ -265,6 +269,8 @@ export function getHeaders(ignoreHeaders: boolean = false) {
     const isChatGLM = modelConfig.providerName === ServiceProvider.ChatGLM;
     const isSiliconFlow =
       modelConfig.providerName === ServiceProvider.SiliconFlow;
+    const isOpenRouter =
+      modelConfig.providerName === ServiceProvider.OpenRouter;
     const isEnabledAccessControl = accessStore.enabledAccessControl();
     const apiKey = isGoogle
       ? accessStore.googleApiKey
@@ -286,6 +292,8 @@ export function getHeaders(ignoreHeaders: boolean = false) {
       ? accessStore.chatglmApiKey
       : isSiliconFlow
       ? accessStore.siliconflowApiKey
+      : isOpenRouter
+      ? accessStore.openrouterApiKey
       : isIflytek
       ? accessStore.iflytekApiKey && accessStore.iflytekApiSecret
         ? accessStore.iflytekApiKey + ":" + accessStore.iflytekApiSecret
@@ -304,6 +312,7 @@ export function getHeaders(ignoreHeaders: boolean = false) {
       isXAI,
       isChatGLM,
       isSiliconFlow,
+      isOpenRouter,
       apiKey,
       isEnabledAccessControl,
     };
@@ -332,6 +341,7 @@ export function getHeaders(ignoreHeaders: boolean = false) {
     isXAI,
     isChatGLM,
     isSiliconFlow,
+    isOpenRouter,
     apiKey,
     isEnabledAccessControl,
   } = getConfig();
@@ -382,6 +392,8 @@ export function getClientApi(provider: ServiceProvider): ClientApi {
       return new ClientApi(ModelProvider.ChatGLM);
     case ServiceProvider.SiliconFlow:
       return new ClientApi(ModelProvider.SiliconFlow);
+    case ServiceProvider.OpenRouter:
+      return new ClientApi(ModelProvider.OpenRouter);
     default:
       return new ClientApi(ModelProvider.GPT);
   }