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Implement sub domain matching in JS

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Changelog mentions that _the implementers should take care of matching the second level domain names properly_, however this wasn't implemented in code examples. At least not in JS.
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Zwyx 2024-02-26 15:00:53 +08:00 committed by GitHub
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README.md
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@ -128,10 +128,21 @@ async function isDisposable(email) {
if (!blocklist) { if (!blocklist) {
const content = await readFile('disposable_email_blocklist.conf', { encoding: 'utf-8' }) const content = await readFile('disposable_email_blocklist.conf', { encoding: 'utf-8' })
blocklist = content.split('\r\n').slice(0, -1) blocklist = content.split('\r\n').slice(0, -1) // Change to `'\n'` depending on your system
} }
return blocklist.includes(email.split('@')[1]) const domains = Array.from((email.split('@')[1] || '').matchAll(/(?=(?:\.|^)(.*))/g))
.map(match => match[1])
.slice(0, -1);
// Or, longer but easier to read for people unfamiliar with regex:
// const domains = (email.split('@')[1] || '')
// .split('.')
// .reverse()
// .reduce((acc, cur) => [...acc, `${cur}${acc.length ? `.${acc[acc.length - 1]}` : ''}`], []) // use `reduce<string[]>` with TypeScript
// .slice(1);
return domains.map(domain => blocklist.includes(domain || '')).some(Boolean);
} }
``` ```