QOL shit

2026-08-18 00:12:36 -05:00
parent 49604b8b53
commit 4b8de29d32
4 changed files with 134 additions and 2 deletions
@@ -0,0 +1,45 @@
+function extractHostname(value) {
+  const candidate = String(value || "").trim();
+  if (!candidate) return "";
+
+  try {
+    const url = new URL(/^[a-z][a-z\d+.-]*:\/\//i.test(candidate) ? candidate : `http://${candidate}`);
+    return url.hostname.replace(/^\[|\]$/g, "").replace(/\.$/, "").toLowerCase();
+  } catch {
+    return candidate.replace(/^\[|\]$/g, "").split("%")[0].toLowerCase();
+  }
+}
+
+function isLocalIpv4(hostname) {
+  const parts = hostname.split(".");
+  if (parts.length !== 4 || parts.some((part) => !/^\d{1,3}$/.test(part))) return false;
+  const octets = parts.map(Number);
+  if (octets.some((octet) => octet > 255)) return false;
+
+  return octets[0] === 0
+    || octets[0] === 10
+    || octets[0] === 127
+    || (octets[0] === 169 && octets[1] === 254)
+    || (octets[0] === 172 && octets[1] >= 16 && octets[1] <= 31)
+    || (octets[0] === 192 && octets[1] === 168);
+}
+
+function isLocalIpv6(hostname) {
+  const host = hostname.split("%")[0];
+  if (host === "::" || host === "::1" || host === "0:0:0:0:0:0:0:1") return true;
+
+  const mappedIpv4 = host.match(/^(?:::ffff:|0:0:0:0:0:ffff:)(\d+\.\d+\.\d+\.\d+)$/i);
+  if (mappedIpv4) return isLocalIpv4(mappedIpv4[1]);
+
+  const firstHextet = Number.parseInt(host.split(":", 1)[0], 16);
+  return Number.isFinite(firstHextet)
+    && ((firstHextet >= 0xfc00 && firstHextet <= 0xfdff)
+      || (firstHextet >= 0xfe80 && firstHextet <= 0xfebf));
+}
+
+export function isLocalServerAddress(value) {
+  const hostname = extractHostname(value);
+  if (!hostname) return false;
+  if (hostname === "localhost" || hostname.endsWith(".localhost")) return true;
+  return isLocalIpv4(hostname) || (hostname.includes(":") && isLocalIpv6(hostname));
+}