Initial commit: Book management system with Rust Loco backend and Vue 3 frontend

node_modules/axios/lib/helpers/shouldBypassProxy.js

@@ -0,0 +1,153 @@
+const LOOPBACK_HOSTNAMES = new Set(['localhost']);
+
+const isIPv4Loopback = (host) => {
+  const parts = host.split('.');
+  if (parts.length !== 4) return false;
+  if (parts[0] !== '127') return false;
+  return parts.every((p) => /^\d+$/.test(p) && Number(p) >= 0 && Number(p) <= 255);
+};
+
+const isIPv6Loopback = (host) => {
+  // Collapse all-zero groups: any form of ::1 / 0:0:...:0:1
+  // First, strip any leading "::" by normalising with Set lookup of common forms,
+  // then fall back to structural check.
+  if (host === '::1') return true;
+
+  // Check IPv4-mapped IPv6 loopback: ::ffff:<v4-loopback> or ::ffff:<hex-v4-loopback>
+  // Node's URL parser normalises ::ffff:127.0.0.1 → ::ffff:7f00:1
+  const v4MappedDotted = host.match(/^::ffff:(\d+\.\d+\.\d+\.\d+)$/i);
+  if (v4MappedDotted) return isIPv4Loopback(v4MappedDotted[1]);
+
+  const v4MappedHex = host.match(/^::ffff:([0-9a-f]{1,4}):([0-9a-f]{1,4})$/i);
+  if (v4MappedHex) {
+    const high = parseInt(v4MappedHex[1], 16);
+    // High 16 bits must start with 127 (0x7f) — i.e. 0x7f00..0x7fff
+    return high >= 0x7f00 && high <= 0x7fff;
+  }
+
+  // Full-form ::1 variants: any number of zero groups followed by trailing 1
+  // e.g. 0:0:0:0:0:0:0:1, 0000:...:0001
+  const groups = host.split(':');
+  if (groups.length === 8) {
+    for (let i = 0; i < 7; i++) {
+      if (!/^0+$/.test(groups[i])) return false;
+    }
+    return /^0*1$/.test(groups[7]);
+  }
+
+  return false;
+};
+
+const isLoopback = (host) => {
+  if (!host) return false;
+  if (LOOPBACK_HOSTNAMES.has(host)) return true;
+  if (isIPv4Loopback(host)) return true;
+  return isIPv6Loopback(host);
+};
+
+const DEFAULT_PORTS = {
+  http: 80,
+  https: 443,
+  ws: 80,
+  wss: 443,
+  ftp: 21,
+};
+
+const parseNoProxyEntry = (entry) => {
+  let entryHost = entry;
+  let entryPort = 0;
+
+  if (entryHost.charAt(0) === '[') {
+    const bracketIndex = entryHost.indexOf(']');
+
+    if (bracketIndex !== -1) {
+      const host = entryHost.slice(1, bracketIndex);
+      const rest = entryHost.slice(bracketIndex + 1);
+
+      if (rest.charAt(0) === ':' && /^\d+$/.test(rest.slice(1))) {
+        entryPort = Number.parseInt(rest.slice(1), 10);
+      }
+
+      return [host, entryPort];
+    }
+  }
+
+  const firstColon = entryHost.indexOf(':');
+  const lastColon = entryHost.lastIndexOf(':');
+
+  if (
+    firstColon !== -1 &&
+    firstColon === lastColon &&
+    /^\d+$/.test(entryHost.slice(lastColon + 1))
+  ) {
+    entryPort = Number.parseInt(entryHost.slice(lastColon + 1), 10);
+    entryHost = entryHost.slice(0, lastColon);
+  }
+
+  return [entryHost, entryPort];
+};
+
+const normalizeNoProxyHost = (hostname) => {
+  if (!hostname) {
+    return hostname;
+  }
+
+  if (hostname.charAt(0) === '[' && hostname.charAt(hostname.length - 1) === ']') {
+    hostname = hostname.slice(1, -1);
+  }
+
+  return hostname.replace(/\.+$/, '');
+};
+
+export default function shouldBypassProxy(location) {
+  let parsed;
+
+  try {
+    parsed = new URL(location);
+  } catch (_err) {
+    return false;
+  }
+
+  const noProxy = (process.env.no_proxy || process.env.NO_PROXY || '').toLowerCase();
+
+  if (!noProxy) {
+    return false;
+  }
+
+  if (noProxy === '*') {
+    return true;
+  }
+
+  const port =
+    Number.parseInt(parsed.port, 10) || DEFAULT_PORTS[parsed.protocol.split(':', 1)[0]] || 0;
+
+  const hostname = normalizeNoProxyHost(parsed.hostname.toLowerCase());
+
+  return noProxy.split(/[\s,]+/).some((entry) => {
+    if (!entry) {
+      return false;
+    }
+
+    let [entryHost, entryPort] = parseNoProxyEntry(entry);
+
+    entryHost = normalizeNoProxyHost(entryHost);
+
+    if (!entryHost) {
+      return false;
+    }
+
+    if (entryPort && entryPort !== port) {
+      return false;
+    }
+
+    if (entryHost.charAt(0) === '*') {
+      entryHost = entryHost.slice(1);
+    }
+
+    if (entryHost.charAt(0) === '.') {
+      return hostname.endsWith(entryHost);
+    }
+
+    return hostname === entryHost || (isLoopback(hostname) && isLoopback(entryHost));
+  });
+}