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Fix `m3u-prune` scriptlet 

Related issue:
- https://www.reddit.com/r/uBlockOrigin/comments/14cbznu/foxcom_ssai_workaround/
This commit is contained in:
Raymond Hill 2023-06-18 14:29:11 -04:00
parent 2170aba132
commit bd7318da3c
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GPG Key ID: 25E1490B761470C2
1 changed files with 37 additions and 6 deletions
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41
assets/resources/scriptlets.js
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@ -2311,6 +2311,11 @@ function xmlPrune(
builtinScriptlets.push({
name: 'm3u-prune.js',
fn: m3uPrune,
dependencies: [
'get-extra-args.fn',
'safe-self.fn',
'should-log.fn',
],
});
// https://en.wikipedia.org/wiki/M3U
function m3uPrune(
@ -2318,6 +2323,9 @@ function m3uPrune(
urlPattern = ''
) {
if ( typeof m3uPattern !== 'string' ) { return; }
const options = getExtraArgs(Array.from(arguments), 2);
const logLevel = shouldLog(options);
const safe = safeSelf();
const regexFromArg = arg => {
if ( arg === '' ) { return /^/; }
const match = /^\/(.+)\/([gms]*)$/.exec(arg);
@ -2367,16 +2375,39 @@ function m3uPrune(
for (;;) {
const match = reM3u.exec(text);
if ( match === null ) { break; }
const before = text.slice(0, match.index);
if ( before.length === 0 || /[\n\r]+\s*$/.test(before) ) {
const after = text.slice(match.index + match[0].length);
if ( after.length === 0 || /^\s*[\n\r]+/.test(after) ) {
let discard = match[0];
let before = text.slice(0, match.index);
if (
/^[\n\r]+/.test(discard) === false &&
/[\n\r]+$/.test(before) === false
) {
const startOfLine = /[^\n\r]+$/.exec(before);
if ( startOfLine !== null ) {
before = before.slice(0, startOfLine.index);
discard = startOfLine[0] + discard;
}
}
let after = text.slice(match.index + match[0].length);
if (
/[\n\r]+$/.test(discard) === false &&
/^[\n\r]+/.test(after) === false
) {
const endOfLine = /^[^\n\r]+/.exec(after);
if ( endOfLine !== null ) {
after = after.slice(endOfLine.index);
discard += discard + endOfLine[0];
}
}
text = before.trim() + '\n' + after.trim();
reM3u.lastIndex = before.length + 1;
}
if ( logLevel ) {
safe.uboLog('m3u-prune: discarding\n',
discard.split(/\n+/).map(s => `\t${s}`).join('\n')
);
}
if ( reM3u.global === false ) { break; }
}
return text;
}
const lines = text.split(/\n\r|\n|\r/);
for ( let i = 0; i < lines.length; i++ ) {