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server: encode non-ascii domains in punycode in matchHost

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Norm 2022-12-01 11:34:11 -05:00
parent 075e251822
commit a35c98bbd5
Signed by untrusted user: norm
GPG key ID: 7123E30E441E80DE
1 changed files with 9 additions and 6 deletions
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13
packages/backend/src/misc/skipped-instances.ts
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@ -1,3 +1,4 @@
import { toASCII } from 'punycode/';
import { db } from '@/db/postgre.js';
import { fetchMeta } from '@/misc/fetch-meta.js';
import { Instance } from '@/models/entities/instance.js';
@ -9,17 +10,19 @@ const deadThreshold = 7 * DAY;
/**
* Returns whether a given host matches a wildcard pattern.
* @param host punycoded instance host
* @param pattern wildcard pattern containing a punycoded instance host
* @param host instance host
* @param pattern wildcard pattern containing an instance host
* @returns whether the post matches the pattern
*/
function matchHost(host: Instance['host'], pattern: string): boolean {
// Escape all of the regex special characters. Pattern from:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#escaping
const escape = (str: string): string => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
const re = new RegExp('^' + pattern.split('*').map(toASCII).map(escape).join('.*') + '$');
const re = new RegExp('^' + pattern.split('*').map(escape).join('.*') + '$');
return re.test(host);
// Encode the domain in punycode in case it uses non-ascii
const punycoded = toASCII(host);
return re.test(punycoded);
}
/**
@ -53,7 +56,7 @@ export async function skippedInstances(hosts: Array<Instance['host']>): Promise<
deadTime.toISOString(),
// don't check hosts again that we already know are suspended
// also avoids adding duplicates to the list
hosts.filter(host => !skipped.some(blockedHost => matchHost(host, blockedHost)) && !host.includes(',')).join(','),
hosts.filter(host => !skipped.includes(host) && !host.includes(',')).join(','),
],
)
.then(res => res.map(row => row.host)),