79 lines
1.8 KiB
TypeScript
79 lines
1.8 KiB
TypeScript
import { toASCII } from "tr46";
|
|
import { getTLD } from "./tldList";
|
|
|
|
export default function validLink(link: string) {
|
|
let finalURL;
|
|
try {
|
|
new URL(link);
|
|
return true;
|
|
} catch (error) {
|
|
// if the URL is invalid, try to add the protocol
|
|
try {
|
|
finalURL = new URL("http://" + link);
|
|
} catch (error) {
|
|
return false;
|
|
}
|
|
}
|
|
if (finalURL.host.endsWith(".")) return false;
|
|
return validTLD(finalURL.host) ||
|
|
isValidIPv6(link.slice(1, finalURL.host.length - 1)) ||
|
|
isValidIPv4(link);
|
|
|
|
}
|
|
|
|
export function validTLD(domain: string): boolean {
|
|
if (!domain.includes(".")) return false;
|
|
const tld = toASCII(domain.split(".").reverse()[0]);
|
|
const tldList = getTLD();
|
|
return !!tldList.includes(tld.toUpperCase());
|
|
}
|
|
|
|
export function isValidIPv6(ip: string): boolean {
|
|
const length = ip.length;
|
|
let groups = 1;
|
|
let groupDigits = 0;
|
|
let doubleColonCount = 0;
|
|
for (let i = 0; i < length; i++) {
|
|
const char = ip[i];
|
|
if ("0" <= char && char <= "9") {
|
|
groupDigits++;
|
|
} else if ("a" <= char && char <= "f") {
|
|
groupDigits++;
|
|
} else if ("A" <= char && char <= "F") {
|
|
groupDigits++;
|
|
} else if (char === ":" && i + 1 < length && ip[i + 1] !== ":") {
|
|
groups++;
|
|
groupDigits = 0;
|
|
} else if (char === ":" && i + 1 < length && ip[i + 1] === ":") {
|
|
doubleColonCount++;
|
|
i++;
|
|
groupDigits = 0;
|
|
} else {
|
|
return false;
|
|
}
|
|
if (groups > 8) {
|
|
return false;
|
|
} else if (groupDigits > 4) {
|
|
return false;
|
|
} else if (doubleColonCount > 1) {
|
|
return false;
|
|
}
|
|
}
|
|
return !(doubleColonCount === 0 && groups !== 8);
|
|
|
|
}
|
|
|
|
export function isValidIPv4(ip: string): boolean {
|
|
const parts = ip.split(".");
|
|
if (parts.length !== 4) {
|
|
return false;
|
|
}
|
|
for (const part of parts) {
|
|
const num = Number(part);
|
|
if (isNaN(num) || num < 0 || num > 255 || !part.match(/^\d+$/)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|