mirror of
https://github.com/Wei-Shaw/claude-relay-service.git
synced 2026-01-23 09:38:02 +00:00
652 lines
22 KiB
JavaScript
652 lines
22 KiB
JavaScript
const axios = require('axios')
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const ccrAccountService = require('./ccrAccountService')
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const logger = require('../utils/logger')
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const config = require('../../config/config')
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const { parseVendorPrefixedModel } = require('../utils/modelHelper')
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class CcrRelayService {
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constructor() {
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this.defaultUserAgent = 'claude-relay-service/1.0.0'
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}
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// 🚀 转发请求到CCR API
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async relayRequest(
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requestBody,
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apiKeyData,
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clientRequest,
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clientResponse,
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clientHeaders,
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accountId,
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options = {}
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) {
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let abortController = null
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let account = null
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try {
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// 获取账户信息
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account = await ccrAccountService.getAccount(accountId)
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if (!account) {
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throw new Error('CCR account not found')
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}
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logger.info(
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`📤 Processing CCR API request for key: ${apiKeyData.name || apiKeyData.id}, account: ${account.name} (${accountId})`
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)
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logger.debug(`🌐 Account API URL: ${account.apiUrl}`)
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logger.debug(`🔍 Account supportedModels: ${JSON.stringify(account.supportedModels)}`)
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logger.debug(`🔑 Account has apiKey: ${!!account.apiKey}`)
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logger.debug(`📝 Request model: ${requestBody.model}`)
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// 处理模型前缀解析和映射
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const { baseModel } = parseVendorPrefixedModel(requestBody.model)
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logger.debug(`🔄 Parsed base model: ${baseModel} from original: ${requestBody.model}`)
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let mappedModel = baseModel
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if (
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account.supportedModels &&
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typeof account.supportedModels === 'object' &&
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!Array.isArray(account.supportedModels)
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) {
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const newModel = ccrAccountService.getMappedModel(account.supportedModels, baseModel)
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if (newModel !== baseModel) {
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logger.info(`🔄 Mapping model from ${baseModel} to ${newModel}`)
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mappedModel = newModel
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}
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}
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// 创建修改后的请求体，使用去前缀后的模型名
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const modifiedRequestBody = {
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...requestBody,
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model: mappedModel
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}
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// 创建代理agent
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const proxyAgent = ccrAccountService._createProxyAgent(account.proxy)
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// 创建AbortController用于取消请求
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abortController = new AbortController()
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// 设置客户端断开监听器
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const handleClientDisconnect = () => {
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logger.info('🔌 Client disconnected, aborting CCR request')
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if (abortController && !abortController.signal.aborted) {
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abortController.abort()
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}
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}
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// 监听客户端断开事件
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if (clientRequest) {
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clientRequest.once('close', handleClientDisconnect)
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}
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if (clientResponse) {
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clientResponse.once('close', handleClientDisconnect)
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}
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// 构建完整的API URL
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const cleanUrl = account.apiUrl.replace(/\/$/, '') // 移除末尾斜杠
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let apiEndpoint
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if (options.customPath) {
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// 如果指定了自定义路径（如 count_tokens），使用它
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const baseUrl = cleanUrl.replace(/\/v1\/messages$/, '') // 移除已有的 /v1/messages
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apiEndpoint = `${baseUrl}${options.customPath}`
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} else {
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// 默认使用 messages 端点
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apiEndpoint = cleanUrl.endsWith('/v1/messages') ? cleanUrl : `${cleanUrl}/v1/messages`
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}
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logger.debug(`🎯 Final API endpoint: ${apiEndpoint}`)
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logger.debug(`[DEBUG] Options passed to relayRequest: ${JSON.stringify(options)}`)
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logger.debug(`[DEBUG] Client headers received: ${JSON.stringify(clientHeaders)}`)
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// 过滤客户端请求头
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const filteredHeaders = this._filterClientHeaders(clientHeaders)
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logger.debug(`[DEBUG] Filtered client headers: ${JSON.stringify(filteredHeaders)}`)
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// 决定使用的 User-Agent：优先使用账户自定义的，否则透传客户端的，最后才使用默认值
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const userAgent =
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account.userAgent ||
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clientHeaders?.['user-agent'] ||
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clientHeaders?.['User-Agent'] ||
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this.defaultUserAgent
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// 准备请求配置
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const requestConfig = {
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method: 'POST',
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url: apiEndpoint,
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data: modifiedRequestBody,
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headers: {
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'Content-Type': 'application/json',
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'anthropic-version': '2023-06-01',
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'User-Agent': userAgent,
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...filteredHeaders
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},
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timeout: config.requestTimeout || 600000,
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signal: abortController.signal,
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validateStatus: () => true // 接受所有状态码
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}
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if (proxyAgent) {
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requestConfig.httpAgent = proxyAgent
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requestConfig.httpsAgent = proxyAgent
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requestConfig.proxy = false
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}
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// 根据 API Key 格式选择认证方式
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if (account.apiKey && account.apiKey.startsWith('sk-ant-')) {
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// Anthropic 官方 API Key 使用 x-api-key
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requestConfig.headers['x-api-key'] = account.apiKey
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logger.debug('[DEBUG] Using x-api-key authentication for sk-ant-* API key')
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} else {
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// 其他 API Key (包括CCR API Key) 使用 Authorization Bearer
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requestConfig.headers['Authorization'] = `Bearer ${account.apiKey}`
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logger.debug('[DEBUG] Using Authorization Bearer authentication')
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}
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logger.debug(
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`[DEBUG] Initial headers before beta: ${JSON.stringify(requestConfig.headers, null, 2)}`
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)
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// 添加beta header如果需要
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if (options.betaHeader) {
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logger.debug(`[DEBUG] Adding beta header: ${options.betaHeader}`)
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requestConfig.headers['anthropic-beta'] = options.betaHeader
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} else {
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logger.debug('[DEBUG] No beta header to add')
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}
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// 发送请求
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logger.debug(
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'📤 Sending request to CCR API with headers:',
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JSON.stringify(requestConfig.headers, null, 2)
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)
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const response = await axios(requestConfig)
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// 移除监听器（请求成功完成）
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if (clientRequest) {
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clientRequest.removeListener('close', handleClientDisconnect)
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}
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if (clientResponse) {
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clientResponse.removeListener('close', handleClientDisconnect)
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}
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logger.debug(`🔗 CCR API response: ${response.status}`)
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logger.debug(`[DEBUG] Response headers: ${JSON.stringify(response.headers)}`)
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logger.debug(`[DEBUG] Response data type: ${typeof response.data}`)
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logger.debug(
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`[DEBUG] Response data length: ${response.data ? (typeof response.data === 'string' ? response.data.length : JSON.stringify(response.data).length) : 0}`
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)
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logger.debug(
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`[DEBUG] Response data preview: ${typeof response.data === 'string' ? response.data.substring(0, 200) : JSON.stringify(response.data).substring(0, 200)}`
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)
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// 检查错误状态并相应处理
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if (response.status === 401) {
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logger.warn(`🚫 Unauthorized error detected for CCR account ${accountId}`)
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await ccrAccountService.markAccountUnauthorized(accountId)
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} else if (response.status === 429) {
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logger.warn(`🚫 Rate limit detected for CCR account ${accountId}`)
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// 收到429先检查是否因为超过了手动配置的每日额度
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await ccrAccountService.checkQuotaUsage(accountId).catch((err) => {
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logger.error('❌ Failed to check quota after 429 error:', err)
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})
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await ccrAccountService.markAccountRateLimited(accountId)
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} else if (response.status === 529) {
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logger.warn(`🚫 Overload error detected for CCR account ${accountId}`)
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await ccrAccountService.markAccountOverloaded(accountId)
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} else if (response.status === 200 || response.status === 201) {
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// 如果请求成功，检查并移除错误状态
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const isRateLimited = await ccrAccountService.isAccountRateLimited(accountId)
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if (isRateLimited) {
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await ccrAccountService.removeAccountRateLimit(accountId)
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}
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const isOverloaded = await ccrAccountService.isAccountOverloaded(accountId)
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if (isOverloaded) {
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await ccrAccountService.removeAccountOverload(accountId)
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}
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}
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// 更新最后使用时间
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await this._updateLastUsedTime(accountId)
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const responseBody =
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typeof response.data === 'string' ? response.data : JSON.stringify(response.data)
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logger.debug(`[DEBUG] Final response body to return: ${responseBody}`)
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return {
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statusCode: response.status,
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headers: response.headers,
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body: responseBody,
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accountId
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}
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} catch (error) {
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// 处理特定错误
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if (error.name === 'AbortError' || error.code === 'ECONNABORTED') {
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logger.info('Request aborted due to client disconnect')
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throw new Error('Client disconnected')
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}
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logger.error(
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`❌ CCR relay request failed (Account: ${account?.name || accountId}):`,
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error.message
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)
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throw error
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}
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}
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// 🌊 处理流式响应
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async relayStreamRequestWithUsageCapture(
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requestBody,
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apiKeyData,
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responseStream,
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clientHeaders,
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usageCallback,
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accountId,
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streamTransformer = null,
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options = {}
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) {
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let account = null
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try {
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// 获取账户信息
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account = await ccrAccountService.getAccount(accountId)
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if (!account) {
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throw new Error('CCR account not found')
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}
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logger.info(
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`📡 Processing streaming CCR API request for key: ${apiKeyData.name || apiKeyData.id}, account: ${account.name} (${accountId})`
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)
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logger.debug(`🌐 Account API URL: ${account.apiUrl}`)
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// 处理模型前缀解析和映射
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const { baseModel } = parseVendorPrefixedModel(requestBody.model)
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logger.debug(`🔄 Parsed base model: ${baseModel} from original: ${requestBody.model}`)
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let mappedModel = baseModel
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if (
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account.supportedModels &&
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typeof account.supportedModels === 'object' &&
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!Array.isArray(account.supportedModels)
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) {
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const newModel = ccrAccountService.getMappedModel(account.supportedModels, baseModel)
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if (newModel !== baseModel) {
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logger.info(`🔄 [Stream] Mapping model from ${baseModel} to ${newModel}`)
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mappedModel = newModel
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}
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}
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// 创建修改后的请求体，使用去前缀后的模型名
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const modifiedRequestBody = {
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...requestBody,
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model: mappedModel
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}
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// 创建代理agent
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const proxyAgent = ccrAccountService._createProxyAgent(account.proxy)
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// 发送流式请求
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await this._makeCcrStreamRequest(
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modifiedRequestBody,
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account,
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proxyAgent,
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clientHeaders,
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responseStream,
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accountId,
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usageCallback,
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streamTransformer,
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options
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)
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// 更新最后使用时间
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await this._updateLastUsedTime(accountId)
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} catch (error) {
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logger.error(`❌ CCR stream relay failed (Account: ${account?.name || accountId}):`, error)
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throw error
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}
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}
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// 🌊 发送流式请求到CCR API
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async _makeCcrStreamRequest(
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body,
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account,
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proxyAgent,
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clientHeaders,
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responseStream,
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accountId,
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usageCallback,
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streamTransformer = null,
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requestOptions = {}
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) {
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return new Promise((resolve, reject) => {
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let aborted = false
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// 构建完整的API URL
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const cleanUrl = account.apiUrl.replace(/\/$/, '') // 移除末尾斜杠
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const apiEndpoint = cleanUrl.endsWith('/v1/messages') ? cleanUrl : `${cleanUrl}/v1/messages`
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logger.debug(`🎯 Final API endpoint for stream: ${apiEndpoint}`)
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// 过滤客户端请求头
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const filteredHeaders = this._filterClientHeaders(clientHeaders)
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logger.debug(`[DEBUG] Filtered client headers: ${JSON.stringify(filteredHeaders)}`)
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// 决定使用的 User-Agent：优先使用账户自定义的，否则透传客户端的，最后才使用默认值
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const userAgent =
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account.userAgent ||
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clientHeaders?.['user-agent'] ||
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clientHeaders?.['User-Agent'] ||
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this.defaultUserAgent
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// 准备请求配置
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const requestConfig = {
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method: 'POST',
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url: apiEndpoint,
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data: body,
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headers: {
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'Content-Type': 'application/json',
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'anthropic-version': '2023-06-01',
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'User-Agent': userAgent,
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...filteredHeaders
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},
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timeout: config.requestTimeout || 600000,
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responseType: 'stream',
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validateStatus: () => true // 接受所有状态码
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}
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if (proxyAgent) {
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requestConfig.httpAgent = proxyAgent
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requestConfig.httpsAgent = proxyAgent
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requestConfig.proxy = false
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}
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// 根据 API Key 格式选择认证方式
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if (account.apiKey && account.apiKey.startsWith('sk-ant-')) {
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// Anthropic 官方 API Key 使用 x-api-key
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requestConfig.headers['x-api-key'] = account.apiKey
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logger.debug('[DEBUG] Using x-api-key authentication for sk-ant-* API key')
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} else {
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// 其他 API Key (包括CCR API Key) 使用 Authorization Bearer
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requestConfig.headers['Authorization'] = `Bearer ${account.apiKey}`
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logger.debug('[DEBUG] Using Authorization Bearer authentication')
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}
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// 添加beta header如果需要
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if (requestOptions.betaHeader) {
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requestConfig.headers['anthropic-beta'] = requestOptions.betaHeader
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}
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// 发送请求
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const request = axios(requestConfig)
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request
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.then((response) => {
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logger.debug(`🌊 CCR stream response status: ${response.status}`)
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// 错误响应处理
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if (response.status !== 200) {
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logger.error(
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`❌ CCR API returned error status: ${response.status} | Account: ${account?.name || accountId}`
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)
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if (response.status === 401) {
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ccrAccountService.markAccountUnauthorized(accountId)
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} else if (response.status === 429) {
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ccrAccountService.markAccountRateLimited(accountId)
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// 检查是否因为超过每日额度
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ccrAccountService.checkQuotaUsage(accountId).catch((err) => {
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logger.error('❌ Failed to check quota after 429 error:', err)
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})
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} else if (response.status === 529) {
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ccrAccountService.markAccountOverloaded(accountId)
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}
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// 设置错误响应的状态码和响应头
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if (!responseStream.headersSent) {
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const errorHeaders = {
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'Content-Type': response.headers['content-type'] || 'application/json',
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'Cache-Control': 'no-cache',
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Connection: 'keep-alive'
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}
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// 避免 Transfer-Encoding 冲突，让 Express 自动处理
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delete errorHeaders['Transfer-Encoding']
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delete errorHeaders['Content-Length']
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responseStream.writeHead(response.status, errorHeaders)
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}
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// 直接透传错误数据，不进行包装
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response.data.on('data', (chunk) => {
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if (!responseStream.destroyed) {
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responseStream.write(chunk)
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}
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})
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response.data.on('end', () => {
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if (!responseStream.destroyed) {
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responseStream.end()
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}
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resolve() // 不抛出异常，正常完成流处理
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})
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return
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}
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// 成功响应，检查并移除错误状态
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ccrAccountService.isAccountRateLimited(accountId).then((isRateLimited) => {
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if (isRateLimited) {
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ccrAccountService.removeAccountRateLimit(accountId)
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}
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})
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ccrAccountService.isAccountOverloaded(accountId).then((isOverloaded) => {
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if (isOverloaded) {
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ccrAccountService.removeAccountOverload(accountId)
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}
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})
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// 设置响应头
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if (!responseStream.headersSent) {
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const headers = {
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'Content-Type': 'text/event-stream',
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'Cache-Control': 'no-cache',
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Connection: 'keep-alive',
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Headers': 'Cache-Control'
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}
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responseStream.writeHead(200, headers)
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}
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// 处理流数据和使用统计收集
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let rawBuffer = ''
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const collectedUsage = {}
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response.data.on('data', (chunk) => {
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if (aborted || responseStream.destroyed) {
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return
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}
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try {
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const chunkStr = chunk.toString('utf8')
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rawBuffer += chunkStr
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// 按行分割处理 SSE 数据
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const lines = rawBuffer.split('\n')
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rawBuffer = lines.pop() // 保留最后一个可能不完整的行
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for (const line of lines) {
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if (line.trim()) {
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// 解析 SSE 数据并收集使用统计
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const usageData = this._parseSSELineForUsage(line)
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if (usageData) {
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Object.assign(collectedUsage, usageData)
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}
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// 应用流转换器（如果提供）
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let outputLine = line
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if (streamTransformer && typeof streamTransformer === 'function') {
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outputLine = streamTransformer(line)
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}
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// 写入到响应流
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if (outputLine && !responseStream.destroyed) {
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responseStream.write(`${outputLine}\n`)
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}
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} else {
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// 空行也需要传递
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if (!responseStream.destroyed) {
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responseStream.write('\n')
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}
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}
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}
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} catch (err) {
|
||
logger.error('❌ Error processing SSE chunk:', err)
|
||
}
|
||
})
|
||
|
||
response.data.on('end', () => {
|
||
if (!responseStream.destroyed) {
|
||
responseStream.end()
|
||
}
|
||
|
||
// 如果收集到使用统计数据，调用回调
|
||
if (usageCallback && Object.keys(collectedUsage).length > 0) {
|
||
try {
|
||
logger.debug(`📊 Collected usage data: ${JSON.stringify(collectedUsage)}`)
|
||
// 在 usage 回调中包含模型信息
|
||
usageCallback({ ...collectedUsage, accountId, model: body.model })
|
||
} catch (err) {
|
||
logger.error('❌ Error in usage callback:', err)
|
||
}
|
||
}
|
||
|
||
resolve()
|
||
})
|
||
|
||
response.data.on('error', (err) => {
|
||
logger.error('❌ Stream data error:', err)
|
||
if (!responseStream.destroyed) {
|
||
responseStream.end()
|
||
}
|
||
reject(err)
|
||
})
|
||
|
||
// 客户端断开处理
|
||
responseStream.on('close', () => {
|
||
logger.info('🔌 Client disconnected from CCR stream')
|
||
aborted = true
|
||
if (response.data && typeof response.data.destroy === 'function') {
|
||
response.data.destroy()
|
||
}
|
||
})
|
||
|
||
responseStream.on('error', (err) => {
|
||
logger.error('❌ Response stream error:', err)
|
||
aborted = true
|
||
})
|
||
})
|
||
.catch((error) => {
|
||
if (!responseStream.headersSent) {
|
||
responseStream.writeHead(500, { 'Content-Type': 'application/json' })
|
||
}
|
||
|
||
const errorResponse = {
|
||
error: {
|
||
type: 'internal_error',
|
||
message: 'CCR API request failed'
|
||
}
|
||
}
|
||
|
||
if (!responseStream.destroyed) {
|
||
responseStream.write(`data: ${JSON.stringify(errorResponse)}\n\n`)
|
||
responseStream.end()
|
||
}
|
||
|
||
reject(error)
|
||
})
|
||
})
|
||
}
|
||
|
||
// 📊 解析SSE行以提取使用统计信息
|
||
_parseSSELineForUsage(line) {
|
||
try {
|
||
if (line.startsWith('data: ')) {
|
||
const data = line.substring(6).trim()
|
||
if (data === '[DONE]') {
|
||
return null
|
||
}
|
||
|
||
const jsonData = JSON.parse(data)
|
||
|
||
// 检查是否包含使用统计信息
|
||
if (jsonData.usage) {
|
||
return {
|
||
input_tokens: jsonData.usage.input_tokens || 0,
|
||
output_tokens: jsonData.usage.output_tokens || 0,
|
||
cache_creation_input_tokens: jsonData.usage.cache_creation_input_tokens || 0,
|
||
cache_read_input_tokens: jsonData.usage.cache_read_input_tokens || 0,
|
||
// 支持 ephemeral cache 字段
|
||
cache_creation_input_tokens_ephemeral_5m:
|
||
jsonData.usage.cache_creation_input_tokens_ephemeral_5m || 0,
|
||
cache_creation_input_tokens_ephemeral_1h:
|
||
jsonData.usage.cache_creation_input_tokens_ephemeral_1h || 0
|
||
}
|
||
}
|
||
|
||
// 检查 message_delta 事件中的使用统计
|
||
if (jsonData.type === 'message_delta' && jsonData.delta && jsonData.delta.usage) {
|
||
return {
|
||
input_tokens: jsonData.delta.usage.input_tokens || 0,
|
||
output_tokens: jsonData.delta.usage.output_tokens || 0,
|
||
cache_creation_input_tokens: jsonData.delta.usage.cache_creation_input_tokens || 0,
|
||
cache_read_input_tokens: jsonData.delta.usage.cache_read_input_tokens || 0,
|
||
cache_creation_input_tokens_ephemeral_5m:
|
||
jsonData.delta.usage.cache_creation_input_tokens_ephemeral_5m || 0,
|
||
cache_creation_input_tokens_ephemeral_1h:
|
||
jsonData.delta.usage.cache_creation_input_tokens_ephemeral_1h || 0
|
||
}
|
||
}
|
||
}
|
||
} catch (err) {
|
||
// 忽略解析错误，不是所有行都包含 JSON
|
||
}
|
||
|
||
return null
|
||
}
|
||
|
||
// 🔍 过滤客户端请求头
|
||
_filterClientHeaders(clientHeaders) {
|
||
if (!clientHeaders) {
|
||
return {}
|
||
}
|
||
|
||
const filteredHeaders = {}
|
||
const allowedHeaders = [
|
||
'accept-language',
|
||
'anthropic-beta',
|
||
'anthropic-dangerous-direct-browser-access'
|
||
]
|
||
|
||
// 只保留允许的头部信息
|
||
for (const [key, value] of Object.entries(clientHeaders)) {
|
||
const lowerKey = key.toLowerCase()
|
||
if (allowedHeaders.includes(lowerKey)) {
|
||
filteredHeaders[key] = value
|
||
}
|
||
}
|
||
|
||
return filteredHeaders
|
||
}
|
||
|
||
// ⏰ 更新账户最后使用时间
|
||
async _updateLastUsedTime(accountId) {
|
||
try {
|
||
const redis = require('../models/redis')
|
||
const client = redis.getClientSafe()
|
||
await client.hset(`ccr_account:${accountId}`, 'lastUsedAt', new Date().toISOString())
|
||
} catch (error) {
|
||
logger.error(`❌ Failed to update last used time for CCR account ${accountId}:`, error)
|
||
}
|
||
}
|
||
}
|
||
|
||
module.exports = new CcrRelayService()
|