Update api/index.js
Browse files- api/index.js +347 -338
api/index.js
CHANGED
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import grpc from '@huayue/grpc-js'
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import protoLoader from '@grpc/proto-loader'
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import {AutoRouter, cors, error, json} from 'itty-router'
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import dotenv from 'dotenv'
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import path,{ dirname } from 'path'
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import { fileURLToPath } from 'url'
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import {createServerAdapter} from '@whatwg-node/server'
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import {createServer} from 'http'
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// 加载环境变量
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dotenv.config();
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// 获取当前文件的目录路径(ESM 方式)
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const __dirname = dirname(fileURLToPath(import.meta.url));
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// 初始化配置
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class Config {
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}
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class GRPCHandler {
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}
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const config = new Config()
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// 中间件
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// 添加运行回源
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const { preflight, corsify } = cors({
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})
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// 添加认证
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const withAuth = (request) => {
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}
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// 返回运行信息
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const logger = (res, req) => {
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}
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const router = AutoRouter({
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before: [preflight],
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missing: () => error(404, '404 not found.'),
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finally: [corsify, logger],
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})
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// Router路径
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router.get('/', () => json({
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service: "AI Chat Completion Proxy",
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],
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note: "Replace YOUR_API_KEY with your actual API key."
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}));
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router.get(config.API_PREFIX + '/v1/models', withAuth, () =>
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)
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router.post(config.API_PREFIX + '/v1/chat/completions', withAuth, (req) => handleCompletion(req));
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async function GrpcToPieces(inputModel,OriginModel,message, rules, stream, temperature, top_p) {
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}
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async function messagesProcess(messages) {
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}
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async function ConvertOpenai(client, request, inputModel, OriginModel, stream) {
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call.on('error', (error) => {
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console.error('Stream error:', error);
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// 如果是 INTERNAL 错误且包含 RST_STREAM,可能是正常的流结束
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if (error.code === 13 && error.details.includes('RST_STREAM')) {
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controller.close();
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} else {
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controller.error(error);
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}
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call.destroy();
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});
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// 处理结束
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call.on('end', () => {
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controller.close();
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});
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'Cache-Control': 'no-cache',
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'Transfer-Encoding': 'chunked'
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},
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});
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} else {
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// 非流式调用保持不变
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const call = await new Promise((resolve, reject) => {
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client.Predict(request,metadata, (err, response) => {
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if (err) reject(err);
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else resolve(response);
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});
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});
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}
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}
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function ChatCompletionWithModel(message, model) {
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}
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function ChatCompletionStreamWithModel(text, model) {
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}
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async function handleCompletion(request) {
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}
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}
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(async () => {
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})()
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import grpc from '@huayue/grpc-js'
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import protoLoader from '@grpc/proto-loader'
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import { AutoRouter, cors, error, json } from 'itty-router'
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import dotenv from 'dotenv'
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import path, { dirname } from 'path'
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import { fileURLToPath } from 'url'
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import { createServerAdapter } from '@whatwg-node/server'
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import { createServer } from 'http'
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// 加载环境变量
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dotenv.config();
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// 获取当前文件的目录路径(ESM 方式)
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const __dirname = dirname(fileURLToPath(import.meta.url));
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// 初始化配置
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class Config {
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constructor() {
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this.API_PREFIX = process.env.API_PREFIX || '/'
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this.API_KEY = process.env.API_KEY || ''
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this.MAX_RETRY_COUNT = process.env.MAX_RETRY_COUNT || 3
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this.RETRY_DELAY = process.env.RETRY_DELAY || 5000
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this.COMMON_GRPC = 'runtime-native-io-vertex-inference-grpc-service-lmuw6mcn3q-ul.a.run.app'
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this.COMMON_PROTO = path.join(__dirname, '..', 'protos', 'VertexInferenceService.proto')
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this.GPT_GRPC = 'runtime-native-io-gpt-inference-grpc-service-lmuw6mcn3q-ul.a.run.app'
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this.GPT_PROTO = path.join(__dirname, '..', 'protos', 'GPTInferenceService.proto')
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this.PORT = process.env.PORT || 8787
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// 添加支持的模型列表
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this.SUPPORTED_MODELS = process.env.SUPPORTED_MODELS || [
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'gpt-4o-mini',
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'gpt-4o',
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'gpt-4-turbo',
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'gpt-4',
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'gpt-3.5-turbo',
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'claude-3-sonnet@20240229',
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'claude-3-opus@20240229',
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'claude-3-haiku@20240307',
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'claude-3-5-sonnet@20240620',
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'gemini-1.5-flash',
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'gemini-1.5-pro',
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'chat-bison',
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'codechat-bison',
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]
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}
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// 添加模型验证方法
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isValidModel(model) {
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// 处理 Claude 模型的特殊格式
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const RegexInput = /^(claude-3-(5-sonnet|haiku|sonnet|opus))-(\d{8})$/
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const matchInput = model.match(RegexInput)
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const normalizedModel = matchInput ? `${matchInput[1]}@${matchInput[3]}` : model
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return this.SUPPORTED_MODELS.includes(normalizedModel)
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}
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}
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class GRPCHandler {
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constructor(protoFilePath) {
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// 动态加载传入的 .proto 文件路径
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this.packageDefinition = protoLoader.loadSync(protoFilePath, {
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keepCase: true,
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longs: String,
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enums: String,
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defaults: true,
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oneofs: true,
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})
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}
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}
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const config = new Config()
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// 中间件
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// 添加运行回源
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const { preflight, corsify } = cors({
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origin: '*',
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allowMethods: '*',
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exposeHeaders: '*',
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})
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// 添加认证
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const withAuth = (request) => {
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if (config.API_KEY) {
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const authHeader = request.headers.get('Authorization')
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if (!authHeader || !authHeader.startsWith('Bearer ')) {
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return error(401, 'Unauthorized: Missing or invalid Authorization header')
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}
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const token = authHeader.substring(7)
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if (token !== config.API_KEY) {
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return error(403, 'Forbidden: Invalid API key')
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}
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}
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}
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// 返回运行信息
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const logger = (res, req) => {
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console.log(req.method, res.status, req.url, Date.now() - req.start, 'ms')
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}
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const router = AutoRouter({
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before: [preflight],
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missing: () => error(404, '404 not found.'),
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finally: [corsify, logger],
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})
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// Router路径
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router.get('/', () => json({
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service: "AI Chat Completion Proxy",
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],
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note: "Replace YOUR_API_KEY with your actual API key."
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}));
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router.get(config.API_PREFIX + '/v1/models', withAuth, () =>
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json({
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object: 'list',
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data: [
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{ id: 'gpt-4o-mini', object: 'model', owned_by: 'pieces-os' },
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{ id: 'gpt-4o', object: 'model', owned_by: 'pieces-os' },
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{ id: 'gpt-4-turbo', object: 'model', owned_by: 'pieces-os' },
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{ id: 'gpt-4', object: 'model', owned_by: 'pieces-os' },
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{ id: 'gpt-3.5-turbo', object: 'model', owned_by: 'pieces-os' },
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{ id: 'claude-3-sonnet-20240229', object: 'model', owned_by: 'pieces-os' },
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{ id: 'claude-3-opus-20240229', object: 'model', owned_by: 'pieces-os' },
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{ id: 'claude-3-haiku-20240307', object: 'model', owned_by: 'pieces-os' },
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{ id: 'claude-3-5-sonnet-20240620', object: 'model', owned_by: 'pieces-os' },
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{ id: 'gemini-1.5-flash', object: 'model', owned_by: 'pieces-os' },
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{ id: 'gemini-1.5-pro', object: 'model', owned_by: 'pieces-os' },
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{ id: 'chat-bison', object: 'model', owned_by: 'pieces-os' },
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{ id: 'codechat-bison', object: 'model', owned_by: 'pieces-os' },
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],
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}),
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)
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router.post(config.API_PREFIX + '/v1/chat/completions', withAuth, (req) => handleCompletion(req));
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async function GrpcToPieces(inputModel, OriginModel, message, rules, stream, temperature, top_p) {
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// 在非GPT类型的模型中,temperature和top_p是无效的
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// 使用系统的根证书
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const credentials = grpc.credentials.createSsl()
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let client, request
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if (inputModel.includes('gpt')) {
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// 加载proto文件
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const packageDefinition = new GRPCHandler(config.GPT_PROTO).packageDefinition
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// 构建请求消息
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request = {
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models: inputModel,
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messages: [
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{ role: 0, message: rules }, // system
|
179 |
+
{ role: 1, message: message }, // user
|
180 |
+
],
|
181 |
+
temperature: temperature || 0.1,
|
182 |
+
top_p: top_p ?? 1,
|
183 |
+
}
|
184 |
+
// 获取gRPC对象
|
185 |
+
const GRPCobjects = grpc.loadPackageDefinition(packageDefinition).runtime.aot.machine_learning.parents.gpt
|
186 |
+
client = new GRPCobjects.GPTInferenceService(config.GPT_GRPC, credentials)
|
187 |
+
} else {
|
188 |
+
// 加载proto文件
|
189 |
+
const packageDefinition = new GRPCHandler(config.COMMON_PROTO).packageDefinition
|
190 |
+
// 构建请求消息
|
191 |
+
request = {
|
192 |
+
models: inputModel,
|
193 |
+
args: {
|
194 |
+
messages: {
|
195 |
+
unknown: 1,
|
196 |
+
message: message,
|
197 |
+
},
|
198 |
+
rules: rules,
|
199 |
+
},
|
200 |
+
}
|
201 |
+
// 获取gRPC对象
|
202 |
+
const GRPCobjects = grpc.loadPackageDefinition(packageDefinition).runtime.aot.machine_learning.parents.vertex
|
203 |
+
client = new GRPCobjects.VertexInferenceService(config.COMMON_GRPC, credentials)
|
204 |
+
}
|
205 |
+
return await ConvertOpenai(client, request, inputModel, OriginModel, stream)
|
206 |
}
|
207 |
|
208 |
async function messagesProcess(messages) {
|
209 |
+
let rules = ''
|
210 |
+
let message = ''
|
211 |
|
212 |
+
for (const msg of messages) {
|
213 |
+
let role = msg.role
|
214 |
+
// 格式化为字符串
|
215 |
+
const contentStr = Array.isArray(msg.content)
|
216 |
+
? msg.content
|
217 |
+
.filter((item) => item.text)
|
218 |
+
.map((item) => item.text)
|
219 |
+
.join('') || ''
|
220 |
+
: msg.content
|
221 |
+
// 判断身份
|
222 |
+
if (role === 'system') {
|
223 |
+
rules += `system:${contentStr};\r\n`
|
224 |
+
} else if (['user', 'assistant'].includes(role)) {
|
225 |
+
message += `${role}:${contentStr};\r\n`
|
226 |
+
}
|
227 |
+
}
|
228 |
|
229 |
+
return { rules, message }
|
230 |
}
|
231 |
|
232 |
async function ConvertOpenai(client, request, inputModel, OriginModel, stream) {
|
233 |
+
const metadata = new grpc.Metadata()
|
234 |
+
metadata.set('User-Agent', 'dart-grpc/2.0.0')
|
235 |
+
for (let i = 0; i < config.MAX_RETRY_COUNT; i++) {
|
236 |
+
try {
|
237 |
+
if (stream) {
|
238 |
+
const call = client.PredictWithStream(request, metadata)
|
239 |
+
const encoder = new TextEncoder()
|
240 |
+
const ReturnStream = new ReadableStream({
|
241 |
+
start(controller) {
|
242 |
+
// 处理数据
|
243 |
+
call.on('data', (response) => {
|
244 |
+
try {
|
245 |
+
let response_code = Number(response.response_code)
|
246 |
+
if (response_code === 204) {
|
247 |
+
controller.close()
|
248 |
+
call.destroy()
|
249 |
+
} else if (response_code === 200) {
|
250 |
+
let response_message
|
251 |
+
if (inputModel.includes('gpt')) {
|
252 |
+
response_message = response.body.message_warpper.message.message
|
253 |
+
} else {
|
254 |
+
response_message = response.args.args.args.message
|
255 |
+
}
|
256 |
+
controller.enqueue(
|
257 |
+
encoder.encode(`data: ${JSON.stringify(ChatCompletionStreamWithModel(response_message, OriginModel))}\n\n`),
|
258 |
+
)
|
259 |
+
} else {
|
260 |
+
console.error(`Invalid response code: ${response_code}`)
|
261 |
+
controller.error(error)
|
262 |
+
}
|
263 |
+
} catch (error) {
|
264 |
+
console.error('Error processing stream data:', error)
|
265 |
+
controller.error(error)
|
266 |
+
}
|
267 |
+
})
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
268 |
|
269 |
+
// 处理错误
|
270 |
+
call.on('error', (error) => {
|
271 |
+
console.error('Stream error:', error)
|
272 |
+
// 如果是 INTERNAL 错误且包含 RST_STREAM,可能是正常的流结束
|
273 |
+
if (error.code === 13 && error.details.includes('RST_STREAM')) {
|
274 |
+
controller.close()
|
275 |
+
} else {
|
276 |
+
controller.error(error)
|
277 |
+
}
|
278 |
+
call.destroy()
|
279 |
+
})
|
280 |
|
281 |
+
// 处理结束
|
282 |
+
call.on('end', () => {
|
283 |
+
controller.close()
|
284 |
+
})
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
285 |
|
286 |
+
// 处理取消
|
287 |
+
return () => {
|
288 |
+
call.destroy()
|
289 |
+
}
|
290 |
+
},
|
291 |
+
})
|
292 |
+
return new Response(ReturnStream, {
|
293 |
+
headers: {
|
294 |
+
'Content-Type': 'text/event-stream',
|
295 |
+
Connection: 'keep-alive',
|
296 |
+
'Cache-Control': 'no-cache',
|
297 |
+
'Transfer-Encoding': 'chunked',
|
298 |
+
},
|
299 |
+
})
|
300 |
+
} else {
|
301 |
+
// 非流式调用保持不变
|
302 |
+
const call = await new Promise((resolve, reject) => {
|
303 |
+
client.Predict(request, metadata, (err, response) => {
|
304 |
+
if (err) reject(err)
|
305 |
+
else resolve(response)
|
306 |
+
})
|
307 |
+
})
|
308 |
+
let response_code = Number(call.response_code)
|
309 |
+
if (response_code === 200) {
|
310 |
+
let response_message
|
311 |
+
if (inputModel.includes('gpt')) {
|
312 |
+
response_message = call.body.message_warpper.message.message
|
313 |
+
} else {
|
314 |
+
response_message = call.args.args.args.message
|
315 |
+
}
|
316 |
+
return new Response(JSON.stringify(ChatCompletionWithModel(response_message, OriginModel)), {
|
317 |
+
headers: {
|
318 |
+
'Content-Type': 'application/json',
|
319 |
+
},
|
320 |
+
})
|
321 |
+
} else {
|
322 |
+
throw new Error(`Invalid response code: ${response_code}`)
|
323 |
}
|
324 |
+
}
|
325 |
+
} catch (err) {
|
326 |
+
console.error(`Attempt ${i + 1} failed:`, err)
|
327 |
+
await new Promise((resolve) => setTimeout(resolve, config.RETRY_DELAY))
|
328 |
+
}
|
329 |
+
}
|
330 |
+
return new Response(
|
331 |
+
JSON.stringify({
|
332 |
+
error: {
|
333 |
+
message: 'An error occurred while processing your request',
|
334 |
+
type: 'server_error',
|
335 |
+
code: 'internal_error',
|
336 |
+
param: null,
|
337 |
+
},
|
338 |
+
}),
|
339 |
+
{
|
340 |
+
status: 500,
|
341 |
+
headers: {
|
342 |
+
'Content-Type': 'application/json',
|
343 |
+
},
|
344 |
+
},
|
345 |
+
)
|
346 |
}
|
347 |
|
|
|
348 |
function ChatCompletionWithModel(message, model) {
|
349 |
+
return {
|
350 |
+
id: 'Chat-Nekohy',
|
351 |
+
object: 'chat.completion',
|
352 |
+
created: Date.now(),
|
353 |
+
model,
|
354 |
+
usage: {
|
355 |
+
prompt_tokens: 0,
|
356 |
+
completion_tokens: 0,
|
357 |
+
total_tokens: 0,
|
358 |
+
},
|
359 |
+
choices: [
|
360 |
+
{
|
361 |
+
message: {
|
362 |
+
content: message,
|
363 |
+
role: 'assistant',
|
364 |
+
},
|
365 |
+
index: 0,
|
366 |
+
},
|
367 |
+
],
|
368 |
+
}
|
369 |
}
|
370 |
|
371 |
function ChatCompletionStreamWithModel(text, model) {
|
372 |
+
return {
|
373 |
+
id: 'chatcmpl-Nekohy',
|
374 |
+
object: 'chat.completion.chunk',
|
375 |
+
created: 0,
|
376 |
+
model,
|
377 |
+
choices: [
|
378 |
+
{
|
379 |
+
index: 0,
|
380 |
+
delta: {
|
381 |
+
content: text,
|
382 |
+
},
|
383 |
+
finish_reason: null,
|
384 |
+
},
|
385 |
+
],
|
386 |
+
}
|
387 |
}
|
388 |
|
389 |
async function handleCompletion(request) {
|
390 |
+
try {
|
391 |
+
// 解析openai格式API请求
|
392 |
+
const { model: OriginModel, messages, stream, temperature, top_p } = await request.json()
|
393 |
+
const RegexInput = /^(claude-3-(5-sonnet|haiku|sonnet|opus))-(\d{8})$/
|
394 |
+
const matchInput = OriginModel.match(RegexInput)
|
395 |
+
const inputModel = matchInput ? `${matchInput[1]}@${matchInput[3]}` : OriginModel
|
396 |
+
// 添加模型验证
|
397 |
+
if (!config.isValidModel(inputModel)) {
|
398 |
+
return new Response(
|
399 |
+
JSON.stringify({
|
400 |
+
error: {
|
401 |
+
message: `Model '${OriginModel}' does not exist`,
|
402 |
+
type: 'invalid_request_error',
|
403 |
+
param: 'model',
|
404 |
+
code: 'model_not_found',
|
405 |
+
},
|
406 |
+
}),
|
407 |
+
{
|
408 |
+
status: 404,
|
409 |
+
headers: {
|
410 |
+
'Content-Type': 'application/json',
|
411 |
+
},
|
412 |
+
},
|
413 |
+
)
|
414 |
+
}
|
415 |
+
console.log(inputModel, messages, stream)
|
416 |
+
// 解析system和user/assistant消息
|
417 |
+
const { rules, message: content } = await messagesProcess(messages)
|
418 |
+
console.log(rules, content)
|
419 |
+
// 响应码,回复的消息
|
420 |
+
return await GrpcToPieces(inputModel, OriginModel, content, rules, stream, temperature, top_p)
|
421 |
+
} catch (err) {
|
422 |
+
return error(500, err.message)
|
423 |
+
}
|
|
|
424 |
}
|
425 |
|
426 |
+
;(async () => {
|
427 |
+
//For Cloudflare Workers
|
428 |
+
if (typeof addEventListener === 'function') return
|
429 |
+
// For Nodejs
|
430 |
+
const ittyServer = createServerAdapter(router.fetch)
|
431 |
+
console.log(`Listening on http://localhost:${config.PORT}`)
|
432 |
+
const httpServer = createServer(ittyServer)
|
433 |
+
httpServer.listen(config.PORT)
|
434 |
+
})()
|