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32 lines
1.2 KiB
32 lines
1.2 KiB
'use strict';
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module.exports = (req, res) => {
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//combines a bunch of parts of the post (name, subject, message, filenames+phashes)
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const fileStrings = res.locals.numFiles ? req.files.file.map(f => `${f.name}|${f.phash || ''}`).join('|') : 0;
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const combinedString = [req.body.name, req.body.message, req.body.subject, req.body.email, fileStrings].join('|').toLowerCase();
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//"strict" filtering adds a bunch of permutations to also compare filters with;
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let strictCombinedString = combinedString;
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//diacritics and "zalgo" removed
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strictCombinedString += combinedString.normalize('NFD').replace(/[\u0300-\u036f]/g, '');
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//zero width spaces removed
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strictCombinedString += combinedString.replace(/[\u200B-\u200D\uFEFF]/g, '');
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//just a-z, 0-9, . and -
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strictCombinedString += combinedString.replace(/[^a-zA-Z0-9.-]+/gm, '');
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//urlendoded characters in URLs replaced (todo: remove this if/when the url regex gets updated to no longer match these)
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strictCombinedString += combinedString.split(/(%[^%]+)/).map(part => {
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try {
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return decodeURIComponent(part);
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} catch(e) {
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return '';
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}
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}).join('');
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return { combinedString, strictCombinedString };
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};
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