107 lines
3.0 KiB
TypeScript
107 lines
3.0 KiB
TypeScript
import { NextRequest, NextResponse } from 'next/server'
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/**
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* 判断IP是否为内网地址
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*/
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function isIntranetIP(ip: string): boolean {
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if (!ip) return false
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// 处理可能存在的端口号
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const cleanIP = ip.split(':')[0]
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// localhost
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if (cleanIP === '127.0.0.1' || cleanIP === 'localhost' || cleanIP === '::1') {
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return true
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}
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// IPv4 内网IP段判断
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const ipv4Regex = /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
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const match = cleanIP.match(ipv4Regex)
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if (match) {
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const [, a, b, c, d] = match.map(Number)
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// 验证IP有效性
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if (a > 255 || b > 255 || c > 255 || d > 255) {
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return false
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}
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// 10.0.0.0 - 10.255.255.255 (Class A)
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if (a === 10) return true
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// 172.16.0.0 - 172.31.255.255 (Class B)
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if (a === 172 && b >= 16 && b <= 31) return true
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// 192.168.0.0 - 192.168.255.255 (Class C)
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if (a === 192 && b === 168) return true
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// 169.254.0.0 - 169.254.255.255 (Link-local)
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if (a === 169 && b === 254) return true
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}
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return false
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}
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/**
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* 获取客户端真实IP地址
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*/
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function getClientIP(request: NextRequest): string {
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// 优先级：x-real-ip > x-forwarded-for > connection
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const xRealIP = request.headers.get('x-real-ip')
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if (xRealIP) return xRealIP
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const xForwardedFor = request.headers.get('x-forwarded-for')
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if (xForwardedFor) {
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// x-forwarded-for 可能包含多个IP，取第一个（客户端真实IP）
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return xForwardedFor.split(',')[0].trim()
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}
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const cfConnectingIP = request.headers.get('cf-connecting-ip') // Cloudflare
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if (cfConnectingIP) return cfConnectingIP
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const trueClientIP = request.headers.get('true-client-ip') // Akamai
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if (trueClientIP) return trueClientIP
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// 如果都没有，返回默认值
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return 'unknown'
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}
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/**
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* GET /api/network-status
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* 返回用户的网络环境状态
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*/
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export async function GET(request: NextRequest) {
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try {
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const clientIP = getClientIP(request)
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const isIntranet = isIntranetIP(clientIP)
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// 获取当前访问的域名
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const hostname = request.headers.get('host') || ''
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const publicDomains = (process.env.PUBLIC_DOMAINS || '').split(',').map(s => s.trim()).filter(Boolean)
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const isPublicDomain = publicDomains.length > 0 ? publicDomains.includes(hostname) : false
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console.log(`[Network Status] IP: ${clientIP}, isIntranet: ${isIntranet}, hostname: ${hostname}`)
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return NextResponse.json({
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success: true,
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isIntranet,
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isPublicDomain,
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// 不返回完整IP地址（隐私保护）
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ipMasked: clientIP.split('.').slice(0, 2).join('.') + '.xxx.xxx',
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message: isIntranet
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? '检测到内网访问'
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: '检测到公网访问',
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intranetUrl: isIntranet && isPublicDomain
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? (process.env.NEXT_PUBLIC_INTRANET_URL || '')
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: null
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})
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} catch (error) {
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console.error('[Network Status] Error:', error)
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return NextResponse.json({
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success: false,
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error: '网络状态检测失败'
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}, { status: 500 })
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}
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}
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