31 lines
593 B
JavaScript
31 lines
593 B
JavaScript
const dns = require('dns');
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function isEmailDomainValid(email) {
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const domain = email.split('@')[1];
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return new Promise((resolve, reject) => {
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dns.lookup(domain, (err, address) => {
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if (err) {
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reject(err);
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}
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else {
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const isIPAddress = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/.test(address);
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resolve(isIPAddress);
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}
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});
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});
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}
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function isValidEmail(email) {
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const emailRegex = /\S+@\S+\.\S+/;
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return emailRegex.test(email);
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}
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function isNumber(x) {
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return /^-?[\d.]+(?:e-?\d+)?$/.test(x);
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}
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module.exports = {
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isEmailDomainValid,
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isValidEmail,
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isNumber,
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}; |