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Improve href-sanitizer scriptlet

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Related issue:
https://github.com/uBlockOrigin/uBlock-issues/issues/3650
This commit is contained in:
Raymond Hill 2025-10-04 10:22:10 -04:00
parent 41a65315f9
commit a43d1d8c42
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GPG key ID: F5630CAE62A14316
1 changed files with 4 additions and 22 deletions
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26
src/js/resources/href-sanitizer.js
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@ -91,35 +91,17 @@ function hrefSanitizer(
}
return '';
};
const extractParam = (href, source) => {
if ( Boolean(source) === false ) { return href; }
const recursive = source.includes('?', 1);
const end = recursive ? source.indexOf('?', 1) : source.length;
try {
const url = new URL(href, document.location);
let value = url.searchParams.get(source.slice(1, end));
if ( value === null ) { return href }
if ( recursive ) { return extractParam(value, source.slice(end)); }
return value;
} catch {
}
return href;
};
const extractURL = (elem, source) => {
if ( /^\[.*\]$/.test(source) ) {
return elem.getAttribute(source.slice(1,-1).trim()) || '';
}
if ( source === 'text' ) {
return elem.textContent
.replace(/^[^\x21-\x7e]+/, '') // remove leading invalid characters
.replace(/[^\x21-\x7e]+$/, '') // remove trailing invalid characters
;
.replace(/^[^\x21-\x7e]+|/, '') // remove leading invalid characters
.replace(/[^\x21-\x7e]+$/, ''); // remove trailing invalid characters
}
if ( source.startsWith('?') === false ) { return ''; }
const steps = source.replace(/(\S)\?/g, '\\1?').split(/\s+/);
const url = steps.length === 1
? extractParam(elem.href, source)
: urlSkip(elem.href, false, steps);
const steps = source.replace(/(\S)\?/g, '\\1 ?').split(/\s+/);
const url = urlSkip(elem.href, false, steps);
if ( url === undefined ) { return; }
return url.replace(/ /g, '%20');
};