35f3f81d3e
- 新增提供商节点自动刷新队列和并发控制 - 添加系统启动预热功能，按配置预热指定数量节点 - 重构CPU使用率统计，支持子进程独立统计 - 扩展适配器接口，增加强制刷新和过期检查方法 - 更新配置管理，新增预热目标和刷新并发数配置 - 优化提供商选择策略，基于评分系统选择最佳节点 - 改进错误处理，401错误自动触发后台刷新
1312 lines
59 KiB
JavaScript
1312 lines
59 KiB
JavaScript
import * as fs from 'fs'; // Import fs module
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import { getServiceAdapter } from './adapter.js';
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import { MODEL_PROVIDER, getProtocolPrefix } from '../utils/common.js';
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import { getProviderModels } from './provider-models.js';
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import axios from 'axios';
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/**
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* Manages a pool of API service providers, handling their health and selection.
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*/
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export class ProviderPoolManager {
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// 默认健康检查模型配置
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// 键名必须与 MODEL_PROVIDER 常量值一致
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static DEFAULT_HEALTH_CHECK_MODELS = {
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'gemini-cli-oauth': 'gemini-2.5-flash',
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'gemini-antigravity': 'gemini-2.5-flash',
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'openai-custom': 'gpt-3.5-turbo',
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'claude-custom': 'claude-3-7-sonnet-20250219',
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'claude-kiro-oauth': 'claude-haiku-4-5',
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'openai-qwen-oauth': 'qwen3-coder-flash',
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'openaiResponses-custom': 'gpt-4o-mini'
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};
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constructor(providerPools, options = {}) {
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this.providerPools = providerPools;
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this.globalConfig = options.globalConfig || {}; // 存储全局配置
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this.providerStatus = {}; // Tracks health and usage for each provider instance
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this.roundRobinIndex = {}; // Tracks the current index for round-robin selection for each provider type
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// 使用 ?? 运算符确保 0 也能被正确设置，而不是被 || 替换为默认值
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this.maxErrorCount = options.maxErrorCount ?? 3; // Default to 3 errors before marking unhealthy
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this.healthCheckInterval = options.healthCheckInterval ?? 10 * 60 * 1000; // Default to 10 minutes
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// 日志级别控制
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this.logLevel = options.logLevel || 'info'; // 'debug', 'info', 'warn', 'error'
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// 添加防抖机制，避免频繁的文件 I/O 操作
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this.saveDebounceTime = options.saveDebounceTime || 1000; // 默认1秒防抖
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this.saveTimer = null;
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this.pendingSaves = new Set(); // 记录待保存的 providerType
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// Fallback 链配置
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this.fallbackChain = options.globalConfig?.providerFallbackChain || {};
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// Model Fallback 映射配置
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this.modelFallbackMapping = options.globalConfig?.modelFallbackMapping || {};
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// 并发控制：每个 providerType 的选择锁
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// 用于确保 selectProvider 的排序 and 更新操作是原子的
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this._selectionLocks = {};
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// --- V2: 读写分离 and 异步刷新队列 ---
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// 刷新并发控制配置
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this.refreshConcurrency = {
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global: options.globalConfig?.REFRESH_CONCURRENCY_GLOBAL ?? 2, // 全局最大并行提供商数
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perProvider: options.globalConfig?.REFRESH_CONCURRENCY_PER_PROVIDER ?? 1 // 每个提供商内部最大并行数
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};
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this.refreshQueues = {}; // 按 providerType 分组的队列
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this.activeProviderRefreshes = 0; // 当前正在刷新的提供商类型数量
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this.globalRefreshWaiters = []; // 等待全局并发槽位的任务
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this.warmupTarget = options.globalConfig?.WARMUP_TARGET || 0; // 默认预热0个节点
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this.refreshingUuids = new Set(); // 正在刷新的节点 UUID 集合
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this.initializeProviderStatus();
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}
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/**
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* 检查所有节点的配置文件，如果发现即将过期则触发刷新
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*/
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async checkAndRefreshExpiringNodes() {
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this._log('info', 'Checking nodes for approaching expiration dates using provider adapters...');
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for (const providerType in this.providerStatus) {
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const providers = this.providerStatus[providerType];
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for (const providerStatus of providers) {
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const config = providerStatus.config;
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// 排除不健康和禁用的节点
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if (!config.isHealthy || config.isDisabled) continue;
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if (config.configPath && fs.existsSync(config.configPath)) {
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try {
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const fileContent = fs.readFileSync(config.configPath, 'utf8');
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const data = JSON.parse(fileContent);
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// 获取对应的适配器
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const tempConfig = {
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...config,
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MODEL_PROVIDER: providerType
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};
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const serviceAdapter = getServiceAdapter(tempConfig);
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// 调用提供商适配器内的 isExpiryDateNear 方法
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let needsRefresh = false;
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if (typeof serviceAdapter.isExpiryDateNear === 'function') {
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// 适配器内部自行判断，不传参
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needsRefresh = serviceAdapter.isExpiryDateNear();
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} else {
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// 兜底逻辑：如果适配器没实现，使用配置数据进行判断
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const expiryDate = data.expiry_date || data.expires_at || data.expiry;
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if (expiryDate) {
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const expiry = new Date(expiryDate).getTime();
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needsRefresh = (expiry - Date.now()) < 24 * 60 * 60 * 1000;
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}
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}
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if (needsRefresh) {
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this._log('warn', `Node ${providerStatus.uuid} (${providerType}) is near expiration. Enqueuing refresh...`);
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this._enqueueRefresh(providerType, providerStatus);
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}
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} catch (err) {
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this._log('error', `Failed to check expiry for node ${providerStatus.uuid}: ${err.message}`);
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}
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}
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}
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}
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}
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/**
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* 系统预热逻辑：按提供商分组，每组预热 warmupTarget 个节点
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* @returns {Promise<void>}
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*/
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async warmupNodes() {
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if (this.warmupTarget <= 0) return;
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this._log('info', `Starting system warmup (Group Target: ${this.warmupTarget} nodes per provider)...`);
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const nodesToWarmup = [];
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for (const type in this.providerStatus) {
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const pool = this.providerStatus[type];
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// 挑选当前提供商下需要预热的节点
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const candidates = pool
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.filter(p => p.config.isHealthy && !p.config.isDisabled && !this.refreshingUuids.has(p.uuid))
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.sort((a, b) => {
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// 优先级 A: 明确标记需要刷新的
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if (a.config.needsRefresh && !b.config.needsRefresh) return -1;
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if (!a.config.needsRefresh && b.config.needsRefresh) return 1;
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// 优先级 B: 按照正常的选择权重排序（最久没用过的优先补）
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const scoreA = this._calculateNodeScore(a);
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const scoreB = this._calculateNodeScore(b);
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return scoreA - scoreB;
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})
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.slice(0, this.warmupTarget);
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candidates.forEach(p => nodesToWarmup.push({ type, status: p }));
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}
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this._log('info', `Warmup: Selected total ${nodesToWarmup.length} nodes across all providers to refresh.`);
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for (const node of nodesToWarmup) {
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this._enqueueRefresh(node.type, node.status, true);
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}
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// 注意：warmupNodes 不等待队列结束，它是异步后台执行的
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}
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/**
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* 将节点放入刷新队列
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* @param {string} providerType
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* @param {object} providerStatus
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* @private
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*/
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_enqueueRefresh(providerType, providerStatus, force = false) {
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const uuid = providerStatus.uuid;
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if (this.refreshingUuids.has(uuid)) {
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this._log('debug', `Node ${uuid} is already in refresh queue.`);
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return;
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}
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this.refreshingUuids.add(uuid);
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// 初始化提供商队列
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if (!this.refreshQueues[providerType]) {
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this.refreshQueues[providerType] = {
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activeCount: 0,
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waitingTasks: []
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};
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}
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const queue = this.refreshQueues[providerType];
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const runTask = async () => {
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try {
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await this._refreshNodeToken(providerType, providerStatus);
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} catch (err) {
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this._log('error', `Failed to process refresh for node ${uuid}: ${err.message}`);
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} finally {
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this.refreshingUuids.delete(uuid);
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queue.activeCount--;
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// 确保在异步操作中 queue 仍然存在
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const currentQueue = this.refreshQueues[providerType];
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// 1. 尝试从当前提供商队列中取下一个任务
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if (currentQueue && currentQueue.waitingTasks.length > 0) {
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const nextTask = currentQueue.waitingTasks.shift();
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currentQueue.activeCount++;
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// 使用 setImmediate 或 Promise.resolve().then 避免过深的递归
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Promise.resolve().then(nextTask);
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} else if (currentQueue && currentQueue.activeCount === 0) {
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// 2. 如果当前提供商的所有任务都完成了，释放全局槽位
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this.activeProviderRefreshes--;
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delete this.refreshQueues[providerType]; // 清理空队列
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// 3. 尝试启动下一个等待中的提供商队列
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if (this.globalRefreshWaiters.length > 0) {
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const nextProviderStart = this.globalRefreshWaiters.shift();
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// 同样避免过深的递归
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Promise.resolve().then(nextProviderStart);
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}
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}
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}
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};
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const tryStartProviderQueue = () => {
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// 再次检查是否已经从 refreshingUuids 中移除（虽然可能性小，但为了健壮性）
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if (queue.activeCount < this.refreshConcurrency.perProvider) {
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queue.activeCount++;
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runTask();
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} else {
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queue.waitingTasks.push(runTask);
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}
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};
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// 检查全局并发限制（按提供商分组）
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// 如果该提供商已经在运行，或者全局槽位还没满，则直接开始
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if (this.refreshQueues[providerType].activeCount > 0 || this.activeProviderRefreshes < this.refreshConcurrency.global) {
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if (this.refreshQueues[providerType].activeCount === 0) {
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this.activeProviderRefreshes++;
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}
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tryStartProviderQueue();
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} else {
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// 否则进入全局等待列表
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this.globalRefreshWaiters.push(() => {
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// 重新获取最新的队列引用，因为可能在等待期间被清理过（虽然逻辑上此时不应该被清理）
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if (!this.refreshQueues[providerType]) {
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this.refreshQueues[providerType] = {
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activeCount: 0,
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waitingTasks: []
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};
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}
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tryStartProviderQueue();
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});
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}
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}
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/**
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* 实际执行节点刷新逻辑
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* @private
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*/
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async _refreshNodeToken(providerType, providerStatus, force = false) {
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const config = providerStatus.config;
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this._log('info', `Starting token refresh for node ${providerStatus.uuid} (${providerType})`);
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try {
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config.refreshCount = (config.refreshCount || 0) + 1;
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// 使用适配器进行刷新
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const tempConfig = {
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...config,
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MODEL_PROVIDER: providerType
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};
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const serviceAdapter = getServiceAdapter(tempConfig);
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// 调用适配器的 refreshToken 方法（内部封装了具体的刷新逻辑）
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if (typeof serviceAdapter.refreshToken === 'function') {
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const startTime = Date.now();
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force ? await serviceAdapter.forceRefreshToken() : await serviceAdapter.refreshToken()
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const duration = Date.now() - startTime;
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this._log('info', `Token refresh successful for node ${providerStatus.uuid} (Duration: ${duration}ms)`);
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// 注意：根据反馈，这里不再执行健康检查验证，直接标记为健康
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this.markProviderHealthy(providerType, config, false);
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} else {
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throw new Error(`refreshToken method not implemented for ${providerType}`);
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}
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} catch (error) {
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this._log('error', `Token refresh failed for node ${providerStatus.uuid}: ${error.message}`);
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this.markProviderUnhealthyImmediately(providerType, config, `Refresh failed: ${error.message}`);
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throw error;
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}
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}
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/**
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* 计算节点的权重/评分，用于排序
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* 分数越低，优先级越高
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* @private
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*/
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_calculateNodeScore(providerStatus) {
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const config = providerStatus.config;
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const now = Date.now();
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// 1. 基础健康分：不健康的排最后
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if (!config.isHealthy || config.isDisabled) return 1000000;
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// 2. 预热/刷新分：5分钟内刷新过且使用次数极少的节点视为“新鲜”，分数极低（最高优）
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const isFresh = config.lastHealthCheckTime &&
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(now - new Date(config.lastHealthCheckTime).getTime() < 300000) &&
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(config.usageCount === 0);
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if (isFresh) return -1000;
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// 3. 时间分：LRU (最久未被使用的排前面)
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const timeScore = config.lastUsed ? new Date(config.lastUsed).getTime() : 0;
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// 4. 健康检查分：最近健康检查通过的稍微优先一点
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const checkScore = config.lastHealthCheckTime ? new Date(config.lastHealthCheckTime).getTime() : 0;
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// 5. 使用次数分：使用次数少的优先
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const usageScore = config.usageCount || 0;
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// 综合得分（时间权重最大）
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return timeScore + (usageScore * 1000) - (checkScore / 1000000);
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}
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/**
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* 获取指定类型的健康节点数量
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*/
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getHealthyCount(providerType) {
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return (this.providerStatus[providerType] || []).filter(p => p.config.isHealthy && !p.config.isDisabled).length;
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}
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/**
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* 日志输出方法，支持日志级别控制
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* @private
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*/
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_log(level, message) {
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const levels = { debug: 0, info: 1, warn: 2, error: 3 };
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if (levels[level] >= levels[this.logLevel]) {
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const logMethod = level === 'debug' ? 'log' : level;
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console[logMethod](`[ProviderPoolManager] ${message}`);
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}
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}
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/**
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* 查找指定的 provider
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* @private
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*/
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_findProvider(providerType, uuid) {
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if (!providerType || !uuid) {
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this._log('error', `Invalid parameters: providerType=${providerType}, uuid=${uuid}`);
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return null;
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}
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const pool = this.providerStatus[providerType];
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return pool?.find(p => p.uuid === uuid) || null;
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}
|
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|
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/**
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* Initializes the status for each provider in the pools.
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* Initially, all providers are considered healthy and have zero usage.
|
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*/
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initializeProviderStatus() {
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for (const providerType in this.providerPools) {
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this.providerStatus[providerType] = [];
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this.roundRobinIndex[providerType] = 0; // Initialize round-robin index for each type
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this._selectionLocks[providerType] = Promise.resolve(); // 初始化选择锁
|
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this.providerPools[providerType].forEach((providerConfig) => {
|
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// Ensure initial health and usage stats are present in the config
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providerConfig.isHealthy = providerConfig.isHealthy !== undefined ? providerConfig.isHealthy : true;
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providerConfig.isDisabled = providerConfig.isDisabled !== undefined ? providerConfig.isDisabled : false;
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providerConfig.lastUsed = providerConfig.lastUsed !== undefined ? providerConfig.lastUsed : null;
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providerConfig.usageCount = providerConfig.usageCount !== undefined ? providerConfig.usageCount : 0;
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providerConfig.errorCount = providerConfig.errorCount !== undefined ? providerConfig.errorCount : 0;
|
||
|
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// --- V2: 刷新监控字段 ---
|
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providerConfig.needsRefresh = providerConfig.needsRefresh !== undefined ? providerConfig.needsRefresh : false;
|
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providerConfig.refreshCount = providerConfig.refreshCount !== undefined ? providerConfig.refreshCount : 0;
|
||
|
||
// 优化2: 简化 lastErrorTime 处理逻辑
|
||
providerConfig.lastErrorTime = providerConfig.lastErrorTime instanceof Date
|
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? providerConfig.lastErrorTime.toISOString()
|
||
: (providerConfig.lastErrorTime || null);
|
||
|
||
// 健康检测相关字段
|
||
providerConfig.lastHealthCheckTime = providerConfig.lastHealthCheckTime || null;
|
||
providerConfig.lastHealthCheckModel = providerConfig.lastHealthCheckModel || null;
|
||
providerConfig.lastErrorMessage = providerConfig.lastErrorMessage || null;
|
||
providerConfig.customName = providerConfig.customName || null;
|
||
|
||
this.providerStatus[providerType].push({
|
||
config: providerConfig,
|
||
uuid: providerConfig.uuid, // Still keep uuid at the top level for easy access
|
||
});
|
||
});
|
||
}
|
||
this._log('info', `Initialized provider statuses: ok (maxErrorCount: ${this.maxErrorCount})`);
|
||
}
|
||
|
||
/**
|
||
* Selects a provider from the pool for a given provider type.
|
||
* Currently uses a simple round-robin for healthy providers.
|
||
* If requestedModel is provided, providers that don't support the model will be excluded.
|
||
*
|
||
* 注意：此方法现在返回 Promise，使用链式锁确保并发安全。
|
||
*
|
||
* @param {string} providerType - The type of provider to select (e.g., 'gemini-cli', 'openai-custom').
|
||
* @param {string} [requestedModel] - Optional. The model name to filter providers by.
|
||
* @returns {Promise<object|null>} The selected provider's configuration, or null if no healthy provider is found.
|
||
*/
|
||
selectProvider(providerType, requestedModel = null, options = {}) {
|
||
// 参数校验
|
||
if (!providerType || typeof providerType !== 'string') {
|
||
this._log('error', `Invalid providerType: ${providerType}`);
|
||
return Promise.resolve(null);
|
||
}
|
||
|
||
// 使用链式锁确保同一 providerType 的选择操作串行执行
|
||
// 这样可以避免并发场景下多个请求选择到同一个 provider
|
||
const currentLock = this._selectionLocks[providerType] || Promise.resolve();
|
||
|
||
const selectionPromise = currentLock.then(() => {
|
||
return this._doSelectProvider(providerType, requestedModel, options);
|
||
});
|
||
|
||
// 更新锁，确保下一个请求等待当前请求完成
|
||
// 使用 catch 确保即使出错也不会阻塞后续请求
|
||
this._selectionLocks[providerType] = selectionPromise.catch(() => {});
|
||
|
||
return selectionPromise;
|
||
}
|
||
|
||
/**
|
||
* 实际执行 provider 选择的内部方法（同步执行，由锁保护）
|
||
* @private
|
||
*/
|
||
_doSelectProvider(providerType, requestedModel, options) {
|
||
const availableProviders = this.providerStatus[providerType] || [];
|
||
|
||
// 检查并恢复已到恢复时间的提供商
|
||
this._checkAndRecoverScheduledProviders(providerType);
|
||
|
||
let availableAndHealthyProviders = availableProviders.filter(p =>
|
||
p.config.isHealthy && !p.config.isDisabled && !p.config.needsRefresh
|
||
);
|
||
|
||
// 如果指定了模型，则排除不支持该模型的提供商
|
||
if (requestedModel) {
|
||
const modelFilteredProviders = availableAndHealthyProviders.filter(p => {
|
||
// 如果提供商没有配置 notSupportedModels，则认为它支持所有模型
|
||
if (!p.config.notSupportedModels || !Array.isArray(p.config.notSupportedModels)) {
|
||
return true;
|
||
}
|
||
// 检查 notSupportedModels 数组中是否包含请求的模型，如果包含则排除
|
||
return !p.config.notSupportedModels.includes(requestedModel);
|
||
});
|
||
|
||
if (modelFilteredProviders.length === 0) {
|
||
this._log('warn', `No available providers for type: ${providerType} that support model: ${requestedModel}`);
|
||
return null;
|
||
}
|
||
|
||
availableAndHealthyProviders = modelFilteredProviders;
|
||
this._log('debug', `Filtered ${modelFilteredProviders.length} providers supporting model: ${requestedModel}`);
|
||
}
|
||
|
||
if (availableAndHealthyProviders.length === 0) {
|
||
this._log('warn', `No available and healthy providers for type: ${providerType}`);
|
||
return null;
|
||
}
|
||
|
||
// 改进：使用统一的评分策略进行选择
|
||
const selected = availableAndHealthyProviders.sort((a, b) => {
|
||
return this._calculateNodeScore(a) - this._calculateNodeScore(b);
|
||
})[0];
|
||
|
||
// 始终更新 lastUsed（确保 LRU 策略生效，避免并发请求选到同一个 provider）
|
||
// usageCount 只在请求成功后才增加（由 skipUsageCount 控制）
|
||
selected.config.lastUsed = new Date().toISOString();
|
||
if (!options.skipUsageCount) {
|
||
selected.config.usageCount++;
|
||
}
|
||
// 使用防抖保存（文件 I/O 是异步的，但内存已经更新）
|
||
this._debouncedSave(providerType);
|
||
|
||
this._log('debug', `Selected provider for ${providerType} (LRU): ${selected.config.uuid}${requestedModel ? ` for model: ${requestedModel}` : ''}${options.skipUsageCount ? ' (skip usage count)' : ''}`);
|
||
|
||
return selected.config;
|
||
}
|
||
|
||
/**
|
||
* Selects a provider from the pool with fallback support.
|
||
* When the primary provider type has no healthy providers, it will try fallback types.
|
||
* @param {string} providerType - The primary type of provider to select.
|
||
* @param {string} [requestedModel] - Optional. The model name to filter providers by.
|
||
* @param {Object} [options] - Optional. Additional options.
|
||
* @param {boolean} [options.skipUsageCount] - Optional. If true, skip incrementing usage count.
|
||
* @returns {object|null} An object containing the selected provider's configuration and the actual provider type used, or null if no healthy provider is found.
|
||
*/
|
||
/**
|
||
* Selects a provider from the pool with fallback support.
|
||
* When the primary provider type has no healthy providers, it will try fallback types.
|
||
*
|
||
* 注意：此方法现在返回 Promise，因为内部调用的 selectProvider 是异步的。
|
||
*
|
||
* @param {string} providerType - The primary type of provider to select.
|
||
* @param {string} [requestedModel] - Optional. The model name to filter providers by.
|
||
* @param {Object} [options] - Optional. Additional options.
|
||
* @param {boolean} [options.skipUsageCount] - Optional. If true, skip incrementing usage count.
|
||
* @returns {Promise<object|null>} An object containing the selected provider's configuration and the actual provider type used, or null if no healthy provider is found.
|
||
*/
|
||
async selectProviderWithFallback(providerType, requestedModel = null, options = {}) {
|
||
// 参数校验
|
||
if (!providerType || typeof providerType !== 'string') {
|
||
this._log('error', `Invalid providerType: ${providerType}`);
|
||
return null;
|
||
}
|
||
|
||
// ==========================
|
||
// 优先级 1: Provider Fallback Chain (同协议/兼容协议的回退)
|
||
// ==========================
|
||
|
||
// 记录尝试过的类型，避免循环
|
||
const triedTypes = new Set();
|
||
const typesToTry = [providerType];
|
||
|
||
const fallbackTypes = this.fallbackChain[providerType] || [];
|
||
if (Array.isArray(fallbackTypes)) {
|
||
typesToTry.push(...fallbackTypes);
|
||
}
|
||
|
||
for (const currentType of typesToTry) {
|
||
// 避免重复尝试
|
||
if (triedTypes.has(currentType)) {
|
||
continue;
|
||
}
|
||
triedTypes.add(currentType);
|
||
|
||
// 检查该类型是否有配置的池
|
||
if (!this.providerStatus[currentType] || this.providerStatus[currentType].length === 0) {
|
||
this._log('debug', `No provider pool configured for type: ${currentType}`);
|
||
continue;
|
||
}
|
||
|
||
// 如果是 fallback 类型，需要检查模型兼容性
|
||
if (currentType !== providerType && requestedModel) {
|
||
// 检查协议前缀是否兼容
|
||
const primaryProtocol = getProtocolPrefix(providerType);
|
||
const fallbackProtocol = getProtocolPrefix(currentType);
|
||
|
||
if (primaryProtocol !== fallbackProtocol) {
|
||
this._log('debug', `Skipping fallback type ${currentType}: protocol mismatch (${primaryProtocol} vs ${fallbackProtocol})`);
|
||
continue;
|
||
}
|
||
|
||
// 检查 fallback 类型是否支持请求的模型
|
||
const supportedModels = getProviderModels(currentType);
|
||
if (supportedModels.length > 0 && !supportedModels.includes(requestedModel)) {
|
||
this._log('debug', `Skipping fallback type ${currentType}: model ${requestedModel} not supported`);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
// 尝试从当前类型选择提供商（现在是异步的）
|
||
const selectedConfig = await this.selectProvider(currentType, requestedModel, options);
|
||
|
||
if (selectedConfig) {
|
||
if (currentType !== providerType) {
|
||
this._log('info', `Fallback activated (Chain): ${providerType} -> ${currentType} (uuid: ${selectedConfig.uuid})`);
|
||
}
|
||
return {
|
||
config: selectedConfig,
|
||
actualProviderType: currentType,
|
||
isFallback: currentType !== providerType
|
||
};
|
||
}
|
||
}
|
||
|
||
// ==========================
|
||
// 优先级 2: Model Fallback Mapping (跨协议/特定模型的回退)
|
||
// ==========================
|
||
|
||
if (requestedModel && this.modelFallbackMapping && this.modelFallbackMapping[requestedModel]) {
|
||
const mapping = this.modelFallbackMapping[requestedModel];
|
||
const targetProviderType = mapping.targetProviderType;
|
||
const targetModel = mapping.targetModel;
|
||
|
||
if (targetProviderType && targetModel) {
|
||
this._log('info', `Trying Model Fallback Mapping for ${requestedModel}: -> ${targetProviderType} (${targetModel})`);
|
||
|
||
// 递归调用 selectProviderWithFallback，但这次针对目标提供商类型
|
||
// 注意：这里我们直接尝试从目标提供商池中选择，因为如果再次递归可能会导致死循环或逻辑复杂化
|
||
// 简单起见，我们直接尝试选择目标提供商
|
||
|
||
// 检查目标类型是否有配置的池
|
||
if (this.providerStatus[targetProviderType] && this.providerStatus[targetProviderType].length > 0) {
|
||
// 尝试从目标类型选择提供商（使用转换后的模型名，现在是异步的）
|
||
const selectedConfig = await this.selectProvider(targetProviderType, targetModel, options);
|
||
|
||
if (selectedConfig) {
|
||
this._log('info', `Fallback activated (Model Mapping): ${providerType} (${requestedModel}) -> ${targetProviderType} (${targetModel}) (uuid: ${selectedConfig.uuid})`);
|
||
return {
|
||
config: selectedConfig,
|
||
actualProviderType: targetProviderType,
|
||
isFallback: true,
|
||
actualModel: targetModel // 返回实际使用的模型名，供上层进行请求转换
|
||
};
|
||
} else {
|
||
// 如果目标类型的主池也不可用，尝试目标类型的 fallback chain
|
||
// 例如 claude-kiro-oauth (mapped) -> claude-custom (chain)
|
||
// 这需要我们小心处理，避免无限递归。
|
||
// 我们可以手动检查目标类型的 fallback chain
|
||
|
||
const targetFallbackTypes = this.fallbackChain[targetProviderType] || [];
|
||
for (const fallbackType of targetFallbackTypes) {
|
||
// 检查协议兼容性 (目标类型 vs 它的 fallback)
|
||
const targetProtocol = getProtocolPrefix(targetProviderType);
|
||
const fallbackProtocol = getProtocolPrefix(fallbackType);
|
||
|
||
if (targetProtocol !== fallbackProtocol) continue;
|
||
|
||
// 检查模型支持
|
||
const supportedModels = getProviderModels(fallbackType);
|
||
if (supportedModels.length > 0 && !supportedModels.includes(targetModel)) continue;
|
||
|
||
const fallbackSelectedConfig = await this.selectProvider(fallbackType, targetModel, options);
|
||
if (fallbackSelectedConfig) {
|
||
this._log('info', `Fallback activated (Model Mapping -> Chain): ${providerType} (${requestedModel}) -> ${targetProviderType} -> ${fallbackType} (${targetModel}) (uuid: ${fallbackSelectedConfig.uuid})`);
|
||
return {
|
||
config: fallbackSelectedConfig,
|
||
actualProviderType: fallbackType,
|
||
isFallback: true,
|
||
actualModel: targetModel
|
||
};
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
this._log('warn', `Model Fallback target provider ${targetProviderType} not configured or empty.`);
|
||
}
|
||
}
|
||
}
|
||
|
||
this._log('warn', `None available provider found for ${providerType} (Model: ${requestedModel}) after checking fallback chain and model mapping.`);
|
||
return null;
|
||
}
|
||
|
||
/**
|
||
* Gets the fallback chain for a given provider type.
|
||
* @param {string} providerType - The provider type to get fallback chain for.
|
||
* @returns {Array<string>} The fallback chain array, or empty array if not configured.
|
||
*/
|
||
getFallbackChain(providerType) {
|
||
return this.fallbackChain[providerType] || [];
|
||
}
|
||
|
||
/**
|
||
* Sets or updates the fallback chain for a provider type.
|
||
* @param {string} providerType - The provider type to set fallback chain for.
|
||
* @param {Array<string>} fallbackTypes - Array of fallback provider types.
|
||
*/
|
||
setFallbackChain(providerType, fallbackTypes) {
|
||
if (!Array.isArray(fallbackTypes)) {
|
||
this._log('error', `Invalid fallbackTypes: must be an array`);
|
||
return;
|
||
}
|
||
this.fallbackChain[providerType] = fallbackTypes;
|
||
this._log('info', `Updated fallback chain for ${providerType}: ${fallbackTypes.join(' -> ')}`);
|
||
}
|
||
|
||
/**
|
||
* Checks if all providers of a given type are unhealthy.
|
||
* @param {string} providerType - The provider type to check.
|
||
* @returns {boolean} True if all providers are unhealthy or disabled.
|
||
*/
|
||
isAllProvidersUnhealthy(providerType) {
|
||
const providers = this.providerStatus[providerType] || [];
|
||
if (providers.length === 0) {
|
||
return true;
|
||
}
|
||
return providers.every(p => !p.config.isHealthy || p.config.isDisabled);
|
||
}
|
||
|
||
/**
|
||
* Gets statistics about provider health for a given type.
|
||
* @param {string} providerType - The provider type to get stats for.
|
||
* @returns {Object} Statistics object with total, healthy, unhealthy, and disabled counts.
|
||
*/
|
||
getProviderStats(providerType) {
|
||
const providers = this.providerStatus[providerType] || [];
|
||
const stats = {
|
||
total: providers.length,
|
||
healthy: 0,
|
||
unhealthy: 0,
|
||
disabled: 0
|
||
};
|
||
|
||
for (const p of providers) {
|
||
if (p.config.isDisabled) {
|
||
stats.disabled++;
|
||
} else if (p.config.isHealthy) {
|
||
stats.healthy++;
|
||
} else {
|
||
stats.unhealthy++;
|
||
}
|
||
}
|
||
|
||
return stats;
|
||
}
|
||
|
||
/**
|
||
* 标记提供商需要刷新并推入刷新队列
|
||
* @param {string} providerType - 提供商类型
|
||
* @param {object} providerConfig - 提供商配置（包含 uuid）
|
||
*/
|
||
markProviderNeedRefresh(providerType, providerConfig) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in markProviderNeedRefresh');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.needsRefresh = true;
|
||
this._log('info', `Marked provider ${providerConfig.uuid} as needsRefresh. Enqueuing...`);
|
||
|
||
// 推入异步刷新队列
|
||
this._enqueueRefresh(providerType, provider);
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Marks a provider as unhealthy (e.g., after an API error).
|
||
* @param {string} providerType - The type of the provider.
|
||
* @param {object} providerConfig - The configuration of the provider to mark.
|
||
* @param {string} [errorMessage] - Optional error message to store.
|
||
*/
|
||
markProviderUnhealthy(providerType, providerConfig, errorMessage = null) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in markProviderUnhealthy');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
const now = Date.now();
|
||
const lastErrorTime = provider.config.lastErrorTime ? new Date(provider.config.lastErrorTime).getTime() : 0;
|
||
const errorWindowMs = 10000; // 10 秒窗口期
|
||
|
||
// 如果距离上次错误超过窗口期，重置错误计数
|
||
if (now - lastErrorTime > errorWindowMs) {
|
||
provider.config.errorCount = 1;
|
||
} else {
|
||
provider.config.errorCount++;
|
||
}
|
||
|
||
provider.config.lastErrorTime = new Date().toISOString();
|
||
// 更新 lastUsed 时间，避免因 LRU 策略导致失败节点被重复选中
|
||
provider.config.lastUsed = new Date().toISOString();
|
||
|
||
// 保存错误信息
|
||
if (errorMessage) {
|
||
provider.config.lastErrorMessage = errorMessage;
|
||
}
|
||
|
||
if (provider.config.errorCount >= this.maxErrorCount) {
|
||
provider.config.isHealthy = false;
|
||
this._log('warn', `Marked provider as unhealthy: ${providerConfig.uuid} for type ${providerType}. Total errors: ${provider.config.errorCount}`);
|
||
} else {
|
||
this._log('warn', `Provider ${providerConfig.uuid} for type ${providerType} error count: ${provider.config.errorCount}/${this.maxErrorCount}. Still healthy.`);
|
||
}
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Marks a provider as unhealthy immediately (without accumulating error count).
|
||
* Used for definitive authentication errors like 401/403.
|
||
* @param {string} providerType - The type of the provider.
|
||
* @param {object} providerConfig - The configuration of the provider to mark.
|
||
* @param {string} [errorMessage] - Optional error message to store.
|
||
*/
|
||
markProviderUnhealthyImmediately(providerType, providerConfig, errorMessage = null) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in markProviderUnhealthyImmediately');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.isHealthy = false;
|
||
provider.config.errorCount = this.maxErrorCount; // Set to max to indicate definitive failure
|
||
provider.config.lastErrorTime = new Date().toISOString();
|
||
provider.config.lastUsed = new Date().toISOString();
|
||
|
||
if (errorMessage) {
|
||
provider.config.lastErrorMessage = errorMessage;
|
||
}
|
||
|
||
this._log('warn', `Immediately marked provider as unhealthy: ${providerConfig.uuid} for type ${providerType}. Reason: ${errorMessage || 'Authentication error'}`);
|
||
|
||
// --- V2: 触发自动刷新 ---
|
||
// this._enqueueRefresh(providerType, provider);
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Marks a provider as unhealthy with a scheduled recovery time.
|
||
* Used for quota exhaustion errors (402) where the quota will reset at a specific time.
|
||
* @param {string} providerType - The type of the provider.
|
||
* @param {object} providerConfig - The configuration of the provider to mark.
|
||
* @param {string} [errorMessage] - Optional error message to store.
|
||
* @param {Date|string} [recoveryTime] - Optional recovery time when the provider should be marked healthy again.
|
||
*/
|
||
markProviderUnhealthyWithRecoveryTime(providerType, providerConfig, errorMessage = null, recoveryTime = null) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in markProviderUnhealthyWithRecoveryTime');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.isHealthy = false;
|
||
provider.config.errorCount = this.maxErrorCount; // Set to max to indicate definitive failure
|
||
provider.config.lastErrorTime = new Date().toISOString();
|
||
provider.config.lastUsed = new Date().toISOString();
|
||
|
||
if (errorMessage) {
|
||
provider.config.lastErrorMessage = errorMessage;
|
||
}
|
||
|
||
// Set recovery time if provided
|
||
if (recoveryTime) {
|
||
const recoveryDate = recoveryTime instanceof Date ? recoveryTime : new Date(recoveryTime);
|
||
provider.config.scheduledRecoveryTime = recoveryDate.toISOString();
|
||
this._log('warn', `Marked provider as unhealthy with recovery time: ${providerConfig.uuid} for type ${providerType}. Recovery at: ${recoveryDate.toISOString()}. Reason: ${errorMessage || 'Quota exhausted'}`);
|
||
} else {
|
||
this._log('warn', `Marked provider as unhealthy: ${providerConfig.uuid} for type ${providerType}. Reason: ${errorMessage || 'Quota exhausted'}`);
|
||
}
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Marks a provider as healthy.
|
||
* @param {string} providerType - The type of the provider.
|
||
* @param {object} providerConfig - The configuration of the provider to mark.
|
||
* @param {boolean} resetUsageCount - Whether to reset usage count (optional, default: false).
|
||
* @param {string} [healthCheckModel] - Optional model name used for health check.
|
||
*/
|
||
markProviderHealthy(providerType, providerConfig, resetUsageCount = false, healthCheckModel = null) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in markProviderHealthy');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.isHealthy = true;
|
||
provider.config.errorCount = 0;
|
||
provider.config.lastErrorTime = null;
|
||
provider.config.lastErrorMessage = null;
|
||
|
||
// 更新健康检测信息
|
||
provider.config.lastHealthCheckTime = new Date().toISOString();
|
||
if (healthCheckModel) {
|
||
provider.config.lastHealthCheckModel = healthCheckModel;
|
||
}
|
||
|
||
// 只有在明确要求重置使用计数时才重置
|
||
if (resetUsageCount) {
|
||
provider.config.usageCount = 0;
|
||
}else{
|
||
provider.config.usageCount++;
|
||
provider.config.lastUsed = new Date().toISOString();
|
||
}
|
||
this._log('info', `Marked provider as healthy: ${provider.config.uuid} for type ${providerType}${resetUsageCount ? ' (usage count reset)' : ''}`);
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 重置提供商的刷新状态（needsRefresh 和 refreshCount）
|
||
* 并将其标记为健康，以便立即投入使用
|
||
* @param {string} providerType - 提供商类型
|
||
* @param {string} uuid - 提供商 UUID
|
||
*/
|
||
resetProviderRefreshStatus(providerType, uuid) {
|
||
if (!providerType || !uuid) {
|
||
this._log('error', 'Invalid parameters in resetProviderRefreshStatus');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, uuid);
|
||
if (provider) {
|
||
provider.config.needsRefresh = false;
|
||
provider.config.refreshCount = 0;
|
||
// 标记为健康，以便立即投入使用
|
||
this._log('info', `Reset refresh status and marked healthy for provider ${uuid} (${providerType})`);
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 重置提供商的计数器（错误计数和使用计数）
|
||
* @param {string} providerType - The type of the provider.
|
||
* @param {object} providerConfig - The configuration of the provider to mark.
|
||
*/
|
||
resetProviderCounters(providerType, providerConfig) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in resetProviderCounters');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.errorCount = 0;
|
||
provider.config.usageCount = 0;
|
||
this._log('info', `Reset provider counters: ${provider.config.uuid} for type ${providerType}`);
|
||
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 禁用指定提供商
|
||
* @param {string} providerType - 提供商类型
|
||
* @param {object} providerConfig - 提供商配置
|
||
*/
|
||
disableProvider(providerType, providerConfig) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in disableProvider');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.isDisabled = true;
|
||
this._log('info', `Disabled provider: ${providerConfig.uuid} for type ${providerType}`);
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 启用指定提供商
|
||
* @param {string} providerType - 提供商类型
|
||
* @param {object} providerConfig - 提供商配置
|
||
*/
|
||
enableProvider(providerType, providerConfig) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in enableProvider');
|
||
return;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
provider.config.isDisabled = false;
|
||
this._log('info', `Enabled provider: ${providerConfig.uuid} for type ${providerType}`);
|
||
this._debouncedSave(providerType);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 刷新指定提供商的 UUID
|
||
* 用于在认证错误（如 401）时更换 UUID，以便重新尝试
|
||
* @param {string} providerType - 提供商类型
|
||
* @param {object} providerConfig - 提供商配置（包含当前 uuid）
|
||
* @returns {string|null} 新的 UUID，如果失败则返回 null
|
||
*/
|
||
refreshProviderUuid(providerType, providerConfig) {
|
||
if (!providerConfig?.uuid) {
|
||
this._log('error', 'Invalid providerConfig in refreshProviderUuid');
|
||
return null;
|
||
}
|
||
|
||
const provider = this._findProvider(providerType, providerConfig.uuid);
|
||
if (provider) {
|
||
const oldUuid = provider.config.uuid;
|
||
// 生成新的 UUID
|
||
const newUuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
|
||
const r = Math.random() * 16 | 0;
|
||
const v = c === 'x' ? r : (r & 0x3 | 0x8);
|
||
return v.toString(16);
|
||
});
|
||
|
||
// 更新 provider 的 UUID
|
||
provider.uuid = newUuid;
|
||
provider.config.uuid = newUuid;
|
||
|
||
// 同时更新 providerPools 中的原始数据
|
||
const poolArray = this.providerPools[providerType];
|
||
if (poolArray) {
|
||
const originalProvider = poolArray.find(p => p.uuid === oldUuid);
|
||
if (originalProvider) {
|
||
originalProvider.uuid = newUuid;
|
||
}
|
||
}
|
||
|
||
this._log('info', `Refreshed provider UUID: ${oldUuid} -> ${newUuid} for type ${providerType}`);
|
||
this._debouncedSave(providerType);
|
||
|
||
return newUuid;
|
||
}
|
||
|
||
this._log('warn', `Provider not found for UUID refresh: ${providerConfig.uuid} in ${providerType}`);
|
||
return null;
|
||
}
|
||
|
||
/**
|
||
* 检查并恢复已到恢复时间的提供商
|
||
* @param {string} [providerType] - 可选，指定要检查的提供商类型。如果不提供，检查所有类型
|
||
* @private
|
||
*/
|
||
_checkAndRecoverScheduledProviders(providerType = null) {
|
||
const now = new Date();
|
||
const typesToCheck = providerType ? [providerType] : Object.keys(this.providerStatus);
|
||
|
||
for (const type of typesToCheck) {
|
||
const providers = this.providerStatus[type] || [];
|
||
for (const providerStatus of providers) {
|
||
const config = providerStatus.config;
|
||
|
||
// 检查是否有 scheduledRecoveryTime 且已到恢复时间
|
||
if (config.scheduledRecoveryTime && !config.isHealthy) {
|
||
const recoveryTime = new Date(config.scheduledRecoveryTime);
|
||
if (now >= recoveryTime) {
|
||
this._log('info', `Auto-recovering provider ${config.uuid} (${type}). Scheduled recovery time reached: ${recoveryTime.toISOString()}`);
|
||
|
||
// 恢复健康状态
|
||
config.isHealthy = true;
|
||
config.errorCount = 0;
|
||
config.lastErrorTime = null;
|
||
config.lastErrorMessage = null;
|
||
config.scheduledRecoveryTime = null; // 清除恢复时间
|
||
|
||
// 保存更改
|
||
this._debouncedSave(type);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Performs health checks on all providers in the pool.
|
||
* This method would typically be called periodically (e.g., via cron job).
|
||
*/
|
||
async performHealthChecks(isInit = false) {
|
||
this._log('info', 'Performing health checks on all providers...');
|
||
const now = new Date();
|
||
|
||
// 首先检查并恢复已到恢复时间的提供商
|
||
this._checkAndRecoverScheduledProviders();
|
||
|
||
for (const providerType in this.providerStatus) {
|
||
for (const providerStatus of this.providerStatus[providerType]) {
|
||
const providerConfig = providerStatus.config;
|
||
|
||
// 如果提供商有 scheduledRecoveryTime 且未到恢复时间，跳过健康检查
|
||
if (providerConfig.scheduledRecoveryTime && !providerConfig.isHealthy) {
|
||
const recoveryTime = new Date(providerConfig.scheduledRecoveryTime);
|
||
if (now < recoveryTime) {
|
||
this._log('debug', `Skipping health check for ${providerConfig.uuid} (${providerType}). Waiting for scheduled recovery at ${recoveryTime.toISOString()}`);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
// Only attempt to health check unhealthy providers after a certain interval
|
||
if (!providerStatus.config.isHealthy && providerStatus.config.lastErrorTime &&
|
||
(now.getTime() - new Date(providerStatus.config.lastErrorTime).getTime() < this.healthCheckInterval)) {
|
||
this._log('debug', `Skipping health check for ${providerConfig.uuid} (${providerType}). Last error too recent.`);
|
||
continue;
|
||
}
|
||
|
||
try {
|
||
// Perform actual health check based on provider type
|
||
const healthResult = await this._checkProviderHealth(providerType, providerConfig);
|
||
|
||
if (healthResult === null) {
|
||
this._log('debug', `Health check for ${providerConfig.uuid} (${providerType}) skipped: Check not implemented.`);
|
||
this.resetProviderCounters(providerType, providerConfig);
|
||
continue;
|
||
}
|
||
|
||
if (healthResult.success) {
|
||
if (!providerStatus.config.isHealthy) {
|
||
// Provider was unhealthy but is now healthy
|
||
// 恢复健康时不重置使用计数，保持原有值
|
||
this.markProviderHealthy(providerType, providerConfig, true, healthResult.modelName);
|
||
this._log('info', `Health check for ${providerConfig.uuid} (${providerType}): Marked Healthy (actual check)`);
|
||
} else {
|
||
// Provider was already healthy and still is
|
||
// 只在初始化时重置使用计数
|
||
this.markProviderHealthy(providerType, providerConfig, true, healthResult.modelName);
|
||
this._log('debug', `Health check for ${providerConfig.uuid} (${providerType}): Still Healthy`);
|
||
}
|
||
} else {
|
||
// Provider is not healthy
|
||
this._log('warn', `Health check for ${providerConfig.uuid} (${providerType}) failed: ${healthResult.errorMessage || 'Provider is not responding correctly.'}`);
|
||
this.markProviderUnhealthy(providerType, providerConfig, healthResult.errorMessage);
|
||
|
||
// 更新健康检测时间和模型（即使失败也记录）
|
||
providerStatus.config.lastHealthCheckTime = new Date().toISOString();
|
||
if (healthResult.modelName) {
|
||
providerStatus.config.lastHealthCheckModel = healthResult.modelName;
|
||
}
|
||
}
|
||
|
||
} catch (error) {
|
||
this._log('error', `Health check for ${providerConfig.uuid} (${providerType}) failed: ${error.message}`);
|
||
// If a health check fails, mark it unhealthy, which will update error count and lastErrorTime
|
||
this.markProviderUnhealthy(providerType, providerConfig, error.message);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 构建健康检查请求（返回多种格式用于重试）
|
||
* @private
|
||
* @returns {Array} 请求格式数组，按优先级排序
|
||
*/
|
||
_buildHealthCheckRequests(providerType, modelName) {
|
||
const baseMessage = { role: 'user', content: 'Hi' };
|
||
const requests = [];
|
||
|
||
// Gemini 使用 contents 格式
|
||
if (providerType.startsWith('gemini')) {
|
||
requests.push({
|
||
contents: [{
|
||
role: 'user',
|
||
parts: [{ text: baseMessage.content }]
|
||
}]
|
||
});
|
||
return requests;
|
||
}
|
||
|
||
// Kiro OAuth 只支持 messages 格式
|
||
if (providerType.startsWith('claude-kiro')) {
|
||
requests.push({
|
||
messages: [baseMessage],
|
||
model: modelName,
|
||
max_tokens: 1
|
||
});
|
||
return requests;
|
||
}
|
||
|
||
// OpenAI Custom Responses 使用特殊格式
|
||
if (providerType === MODEL_PROVIDER.OPENAI_CUSTOM_RESPONSES) {
|
||
requests.push({
|
||
input: [baseMessage],
|
||
model: modelName
|
||
});
|
||
return requests;
|
||
}
|
||
|
||
// 其他提供商（OpenAI、Claude、Qwen）使用标准 messages 格式
|
||
requests.push({
|
||
messages: [baseMessage],
|
||
model: modelName
|
||
});
|
||
|
||
return requests;
|
||
}
|
||
|
||
/**
|
||
* Performs an actual health check for a specific provider.
|
||
* @param {string} providerType - The type of the provider.
|
||
* @param {object} providerConfig - The configuration of the provider to check.
|
||
* @param {boolean} forceCheck - If true, ignore checkHealth config and force the check.
|
||
* @returns {Promise<{success: boolean, modelName: string, errorMessage: string}|null>} - Health check result object or null if check not implemented.
|
||
*/
|
||
async _checkProviderHealth(providerType, providerConfig, forceCheck = false) {
|
||
// 如果未启用健康检查且不是强制检查，返回 null（提前返回，避免不必要的计算）
|
||
if (!providerConfig.checkHealth && !forceCheck) {
|
||
return null;
|
||
}
|
||
|
||
// 确定健康检查使用的模型名称
|
||
const modelName = providerConfig.checkModelName ||
|
||
ProviderPoolManager.DEFAULT_HEALTH_CHECK_MODELS[providerType];
|
||
|
||
if (!modelName) {
|
||
this._log('warn', `Unknown provider type for health check: ${providerType}. Please check DEFAULT_HEALTH_CHECK_MODELS.`);
|
||
return {
|
||
success: false,
|
||
modelName: null,
|
||
errorMessage: `Unknown provider type '${providerType}'. No default health check model configured.`
|
||
};
|
||
}
|
||
|
||
// ========== 实际 API 健康检查（带超时保护）==========
|
||
const tempConfig = {
|
||
...providerConfig,
|
||
MODEL_PROVIDER: providerType
|
||
};
|
||
const serviceAdapter = getServiceAdapter(tempConfig);
|
||
|
||
// 获取所有可能的请求格式
|
||
const healthCheckRequests = this._buildHealthCheckRequests(providerType, modelName);
|
||
|
||
// 健康检查超时时间（15秒，避免长时间阻塞）
|
||
const healthCheckTimeout = 15000;
|
||
let lastError = null;
|
||
|
||
// 重试机制：尝试不同的请求格式
|
||
for (let i = 0; i < healthCheckRequests.length; i++) {
|
||
const healthCheckRequest = healthCheckRequests[i];
|
||
const abortController = new AbortController();
|
||
const timeoutId = setTimeout(() => abortController.abort(), healthCheckTimeout);
|
||
|
||
try {
|
||
this._log('debug', `Health check attempt ${i + 1}/${healthCheckRequests.length} for ${modelName}: ${JSON.stringify(healthCheckRequest)}`);
|
||
|
||
// 尝试将 signal 注入请求体，供支持的适配器使用
|
||
const requestWithSignal = {
|
||
...healthCheckRequest,
|
||
signal: abortController.signal
|
||
};
|
||
|
||
await serviceAdapter.generateContent(modelName, requestWithSignal);
|
||
|
||
clearTimeout(timeoutId);
|
||
return { success: true, modelName, errorMessage: null };
|
||
} catch (error) {
|
||
clearTimeout(timeoutId);
|
||
lastError = error;
|
||
this._log('debug', `Health check attempt ${i + 1} failed for ${providerType}: ${error.message}`);
|
||
}
|
||
}
|
||
|
||
// 所有尝试都失败
|
||
this._log('error', `Health check failed for ${providerType} after ${maxRetries} attempts: ${lastError?.message}`);
|
||
return { success: false, modelName, errorMessage: lastError?.message || 'All health check attempts failed' };
|
||
}
|
||
|
||
/**
|
||
* 优化1: 添加防抖保存方法
|
||
* 延迟保存操作，避免频繁的文件 I/O
|
||
* @private
|
||
*/
|
||
_debouncedSave(providerType) {
|
||
// 将待保存的 providerType 添加到集合中
|
||
this.pendingSaves.add(providerType);
|
||
|
||
// 清除之前的定时器
|
||
if (this.saveTimer) {
|
||
clearTimeout(this.saveTimer);
|
||
}
|
||
|
||
// 设置新的定时器
|
||
this.saveTimer = setTimeout(() => {
|
||
this._flushPendingSaves();
|
||
}, this.saveDebounceTime);
|
||
}
|
||
|
||
/**
|
||
* 批量保存所有待保存的 providerType（优化为单次文件写入）
|
||
* @private
|
||
*/
|
||
async _flushPendingSaves() {
|
||
const typesToSave = Array.from(this.pendingSaves);
|
||
if (typesToSave.length === 0) return;
|
||
|
||
this.pendingSaves.clear();
|
||
this.saveTimer = null;
|
||
|
||
try {
|
||
const filePath = this.globalConfig.PROVIDER_POOLS_FILE_PATH || 'configs/provider_pools.json';
|
||
let currentPools = {};
|
||
|
||
// 一次性读取文件
|
||
try {
|
||
const fileContent = await fs.promises.readFile(filePath, 'utf8');
|
||
currentPools = JSON.parse(fileContent);
|
||
} catch (readError) {
|
||
if (readError.code === 'ENOENT') {
|
||
this._log('info', 'configs/provider_pools.json does not exist, creating new file.');
|
||
} else {
|
||
throw readError;
|
||
}
|
||
}
|
||
|
||
// 更新所有待保存的 providerType
|
||
for (const providerType of typesToSave) {
|
||
if (this.providerStatus[providerType]) {
|
||
currentPools[providerType] = this.providerStatus[providerType].map(p => {
|
||
// Convert Date objects to ISOString if they exist
|
||
const config = { ...p.config };
|
||
if (config.lastUsed instanceof Date) {
|
||
config.lastUsed = config.lastUsed.toISOString();
|
||
}
|
||
if (config.lastErrorTime instanceof Date) {
|
||
config.lastErrorTime = config.lastErrorTime.toISOString();
|
||
}
|
||
if (config.lastHealthCheckTime instanceof Date) {
|
||
config.lastHealthCheckTime = config.lastHealthCheckTime.toISOString();
|
||
}
|
||
return config;
|
||
});
|
||
} else {
|
||
this._log('warn', `Attempted to save unknown providerType: ${providerType}`);
|
||
}
|
||
}
|
||
|
||
// 一次性写入文件
|
||
await fs.promises.writeFile(filePath, JSON.stringify(currentPools, null, 2), 'utf8');
|
||
this._log('info', `configs/provider_pools.json updated successfully for types: ${typesToSave.join(', ')}`);
|
||
} catch (error) {
|
||
this._log('error', `Failed to write provider_pools.json: ${error.message}`);
|
||
}
|
||
}
|
||
|
||
}
|