forked from akai/readest
Huang Xin
59 lines
1.6 KiB
TypeScript
59 lines
1.6 KiB
TypeScript
export const isLanAddress = (url: string) => {
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try {
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const urlObj = new URL(url);
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const hostname = urlObj.hostname;
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if (hostname === 'localhost' || hostname === '127.0.0.1') {
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return true;
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}
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// Check for IPv4 private ranges
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const ipv4Regex = /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
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const match = hostname.match(ipv4Regex);
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if (match) {
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const [, a, b, c, d] = match.map(Number);
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if (a === undefined || b === undefined || c === undefined || d === undefined) {
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return false;
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}
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// Validate IP format
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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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// Check private IP ranges:
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// 10.0.0.0/8 (10.0.0.0 to 10.255.255.255)
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if (a === 10) return true;
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// 172.16.0.0/12 (172.16.0.0 to 172.31.255.255)
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if (a === 172 && b >= 16 && b <= 31) return true;
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// 192.168.0.0/16 (192.168.0.0 to 192.168.255.255)
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if (a === 192 && b === 168) return true;
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// 169.254.0.0/16 (link-local addresses)
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if (a === 169 && b === 254) return true;
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// Tailscale IPv4 range: 100.64.0.0/10 (100.64.0.0 to 100.127.255.255)
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if (a === 100 && b >= 64 && b <= 127) return true;
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}
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// Check for IPv6 private addresses (simplified check)
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if (hostname.includes(':')) {
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if (
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hostname.startsWith('::1') ||
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hostname.startsWith('fe80:') ||
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hostname.startsWith('fc00:') ||
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hostname.startsWith('fd00:')
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) {
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return true;
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}
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}
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return false;
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} catch {
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return false;
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}
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};
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