mirror of
https://github.com/Wei-Shaw/claude-relay-service.git
synced 2026-01-23 09:34:02 +00:00
79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
const logger = require('../utils/logger')
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/**
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* 浏览器/Chrome插件兜底中间件
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* 专门处理第三方插件的兼容性问题
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*/
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const browserFallbackMiddleware = (req, res, next) => {
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const userAgent = req.headers['user-agent'] || ''
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const origin = req.headers['origin'] || ''
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const extractHeader = (value) => {
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let candidate = value
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if (Array.isArray(candidate)) {
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candidate = candidate.find((item) => typeof item === 'string' && item.trim())
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}
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if (typeof candidate !== 'string') {
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return ''
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}
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let trimmed = candidate.trim()
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if (!trimmed) {
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return ''
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}
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if (/^Bearer\s+/i.test(trimmed)) {
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trimmed = trimmed.replace(/^Bearer\s+/i, '').trim()
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}
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return trimmed
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}
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const apiKeyHeader =
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extractHeader(req.headers['x-api-key']) || extractHeader(req.headers['x-goog-api-key'])
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const normalizedKey = extractHeader(req.headers['authorization']) || apiKeyHeader
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// 检查是否为Chrome插件或浏览器请求
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const isChromeExtension = origin.startsWith('chrome-extension://')
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const isBrowserRequest = userAgent.includes('Mozilla/') && userAgent.includes('Chrome/')
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const hasApiKey = normalizedKey.startsWith('cr_') // 我们的API Key格式
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if ((isChromeExtension || isBrowserRequest) && hasApiKey) {
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// 为Chrome插件请求添加特殊标记
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req.isBrowserFallback = true
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req.originalUserAgent = userAgent
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// 🆕 关键修改：伪装成claude-cli请求以绕过客户端限制
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req.headers['user-agent'] = 'claude-cli/1.0.110 (external, cli, browser-fallback)'
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// 确保设置正确的认证头
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if (!req.headers['authorization'] && apiKeyHeader) {
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req.headers['authorization'] = `Bearer ${apiKeyHeader}`
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}
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// 添加必要的Anthropic头
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if (!req.headers['anthropic-version']) {
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req.headers['anthropic-version'] = '2023-06-01'
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}
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if (!req.headers['anthropic-dangerous-direct-browser-access']) {
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req.headers['anthropic-dangerous-direct-browser-access'] = 'true'
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}
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logger.api(
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`🔧 Browser fallback activated for ${isChromeExtension ? 'Chrome extension' : 'browser'} request`
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)
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logger.api(` Original User-Agent: "${req.originalUserAgent}"`)
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logger.api(` Origin: "${origin}"`)
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logger.api(` Modified User-Agent: "${req.headers['user-agent']}"`)
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}
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next()
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}
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module.exports = {
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browserFallbackMiddleware
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}
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