Refactor VPN proxy client implementation

2026-08-09 00:41:52 +03:00
parent 32be4380a3
commit 34d8b681ad
190 changed files with 20064 additions and 9761 deletions
@@ -0,0 +1,78 @@
+export const CONNECTIVITY_IP_SOURCES = Object.freeze([
+  { id: 'cloudflare', label: 'Cloudflare', family: 4, url: 'https://www.cloudflare.com/cdn-cgi/trace' },
+  { id: 'ipify', label: 'ipify', family: 4, url: 'https://api.ipify.org' },
+  { id: 'aws', label: 'AWS', family: 4, url: 'https://checkip.amazonaws.com' },
+  { id: 'icanhazip', label: 'icanhazip', family: 4, url: 'https://icanhazip.com' },
+  { id: 'ifconfig-me', label: 'ifconfig.me', family: 4, url: 'https://ifconfig.me/ip' },
+  { id: 'yandex-internet', label: 'Яндекс Интернетометр', family: 4, url: 'https://yandex.ru/internet/' },
+  { id: 'ipify-v6', label: 'ipify IPv6', family: 6, url: 'https://api6.ipify.org' },
+]);
+
+export const CONNECTIVITY_SITES = Object.freeze([
+  { id: 'google', label: 'Google', url: 'https://www.google.com/generate_204' },
+  { id: 'youtube', label: 'YouTube', url: 'https://www.youtube.com/generate_204' },
+  { id: 'instagram', label: 'Instagram', url: 'https://www.instagram.com/' },
+  { id: 'speedtest', label: 'Speedtest', url: 'https://www.speedtest.net/' },
+  { id: 'yandex', label: 'Яндекс Интернетометр', url: 'https://yandex.ru/internet/' },
+  { id: '2ip', label: '2IP', url: 'https://2ip.ru/' },
+]);
+
+export const MAX_CUSTOM_DIAGNOSTIC_SERVICES = 5;
+
+export interface ConnectivitySiteResult {
+  id: string;
+  label: string;
+  status: string;
+  httpStatus?: number | null;
+  [key: string]: unknown;
+}
+
+export interface ConnectivityPathResult {
+  available?: boolean;
+  internetAvailable: boolean;
+  ipv4: { addresses: string[]; [key: string]: unknown };
+  ipv6: string | null;
+  sites: ConnectivitySiteResult[];
+  [key: string]: unknown;
+}
+
+export function assessConnectivity(direct: ConnectivityPathResult, vpn: ConnectivityPathResult) {
+  const comparisons = direct.sites.map(({ id, label }) => {
+    const directSite = direct.sites.find((site) => site.id === id);
+    const vpnSite = vpn.sites?.find((site) => site.id === id);
+    let assessment = 'inconclusive';
+    if (!vpn.available) assessment = 'not-tested';
+    else if (directSite?.status === 'available' && vpnSite?.status === 'available') {
+      assessment = 'available';
+    } else if (
+      directSite?.status === 'responded'
+      && [403, 451].includes(Number(directSite.httpStatus))
+      && vpnSite?.status === 'available'
+    ) assessment = 'likely-direct-restriction';
+    else if (
+      directSite?.status === 'unavailable'
+      && vpnSite?.status === 'available'
+      && direct.internetAvailable
+    ) {
+      assessment = 'likely-direct-restriction';
+    } else if (directSite?.status === 'available' && vpnSite?.status !== 'available') {
+      assessment = 'vpn-problem';
+    } else if (directSite?.status === 'unavailable' && vpnSite?.status === 'unavailable') {
+      assessment = 'unavailable';
+    }
+    return { id, label, assessment, direct: directSite, vpn: vpnSite || null };
+  });
+  const directAddresses = [...direct.ipv4.addresses, direct.ipv6].filter(Boolean);
+  const vpnAddresses = [...(vpn.ipv4?.addresses || []), vpn.ipv6].filter(Boolean);
+  const sameEgress = directAddresses.some((address) => vpnAddresses.includes(address));
+  let summary = 'inconclusive';
+  if (!vpn.available) summary = 'vpn-off';
+  else if (!direct.internetAvailable && !vpn.internetAvailable) summary = 'offline';
+  else if (!direct.internetAvailable && vpn.internetAvailable) summary = 'direct-offline';
+  else if (direct.internetAvailable && !vpn.internetAvailable) summary = 'vpn-problem';
+  else if (comparisons.some((item) => item.assessment === 'likely-direct-restriction')) {
+    summary = 'likely-direct-restriction';
+  } else if (sameEgress) summary = 'same-ip';
+  else if (comparisons.every((item) => item.assessment === 'available')) summary = 'available';
+  return { summary, sameEgress, comparisons };
+}