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[mv3] Further reduce the number of distinct generated scriptlets

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This commit is contained in:
Raymond Hill 2022-09-18 17:07:02 -04:00
parent 35f4bdd113
commit 89566bc397
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GPG Key ID: 25E1490B761470C2
5 changed files with 262 additions and 90 deletions
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4
platform/mv3/extension/js/scripting-manager.js
View File

@ -114,7 +114,7 @@ const toRegisterable = (fname, entry) => {
];
} else if ( fname.at(-1) === JS_TYPE ) {
directive.js = [
`/rulesets/js/${fname.slice(0,1)}/${fname.slice(1)}.js`
`/rulesets/js/${fname}.js`
];
directive.runAt = 'document_start';
directive.world = 'MAIN';
@ -195,7 +195,7 @@ async function registerInjectable() {
const toRegister = new Map();
const checkRealm = (details, prop, hn) => {
const fnames = details[prop].get(hn);
const fnames = details[prop]?.get(hn);
if ( fnames === undefined ) { return; }
for ( const fname of fnames ) {
const existing = toRegister.get(fname);

237
platform/mv3/make-rulesets.js
View File

@ -60,6 +60,19 @@ const env = [ 'chromium', 'ubol' ];
/******************************************************************************/
const jsonSetMapReplacer = (k, v) => {
if ( v instanceof Set || v instanceof Map ) {
if ( v.size === 0 ) { return; }
return Array.from(v);
}
return v;
};
const uid = (s, l = 8) =>
createHash('sha256').update(s).digest('hex').slice(0,l);
/******************************************************************************/
const isUnsupported = rule =>
rule._error !== undefined;
@ -303,33 +316,10 @@ function addScriptingAPIResources(id, entry, prop, fname) {
/******************************************************************************/
// This group together selectors which are used by a the same hostnames.
function optimizeExtendedFilters(filters) {
if ( filters === undefined ) { return []; }
const merge = new Map();
for ( const [ selector, details ] of filters ) {
const json = JSON.stringify(details);
let entries = merge.get(json);
if ( entries === undefined ) {
entries = new Set();
merge.set(json, entries);
}
entries.add(selector);
}
const out = [];
for ( const [ json, entries ] of merge ) {
const details = JSON.parse(json);
details.payload = Array.from(entries);
out.push(details);
}
return out;
}
/******************************************************************************/
const globalCSSFileSet = new Set();
// Using a at-rule layer declaration allows to raise uBOL's styles above
// that of the page.
const cssDeclaration =
`@layer {
$selector$ {
@ -340,13 +330,54 @@ $selector$ {
function processCosmeticFilters(assetDetails, mapin) {
if ( mapin === undefined ) { return 0; }
const optimized = optimizeExtendedFilters(mapin);
const cssContentMap = new Map();
// Drop worryingly generic-looking selectors, they are too likely to
// cause false positives on unrelated sites. It's the price for a Lite
// version. Examples:
// div[style*="z-index:"]
// [style*="opacity: 0"]
for ( const s of mapin.keys() ) {
if ( /^[a-z]*\[style[^\]]*\](:|$)/.test(s) === false ) { continue; }
// `[style]` attributes with `/` characters are probably ok since they
// likely refer to specific `url()` property.
if ( s.indexOf('/') !== -1 ) { continue; }
// `[style]` attributes with dimension properties might be specific
// enough after all.
if ( /\b(height|width)\s*:\s*\d+px\b/.test(s) ) { continue; }
//console.log(`\tDropping ${s}`);
mapin.delete(s);
}
// This groups together selectors which are used by a the same hostname.
const optimizeExtendedFilters = filters => {
if ( filters === undefined ) { return []; }
const merge = new Map();
for ( const [ selector, details ] of filters ) {
const json = JSON.stringify(details);
let entries = merge.get(json);
if ( entries === undefined ) {
entries = new Set();
merge.set(json, entries);
}
entries.add(selector);
}
const out = [];
for ( const [ json, entries ] of merge ) {
const details = JSON.parse(json);
details.payload = Array.from(entries);
out.push(details);
}
return out;
};
const optimized = optimizeExtendedFilters(mapin);
// This creates a map of unique selectorset => all hostnames
// including/excluding the selectorset. This allows to avoid duplication
// of css content.
const cssContentMap = new Map();
for ( const entry of optimized ) {
const selectors = entry.payload.map(s => ` ${s}`).join(',\n');
// ends-with 0 = css resource
const fname = createHash('sha256').update(selectors).digest('hex').slice(0,8) + '0';
const fname = uid(selectors) + '0';
let contentDetails = cssContentMap.get(fname);
if ( contentDetails === undefined ) {
contentDetails = { selectors };
@ -373,7 +404,6 @@ function processCosmeticFilters(assetDetails, mapin) {
// We do not want more than 128 CSS files per subscription, so we will
// group multiple unrelated selectors in the same file and hope this does
// not cause false positives.
const contentPerFile = Math.ceil(cssContentMap.size / 128);
const cssContentArray = Array.from(cssContentMap).map(entry => entry[1]);
let distinctResourceCount = 0;
@ -389,7 +419,7 @@ function processCosmeticFilters(assetDetails, mapin) {
const selectors = slice.map(entry =>
entry.selectors
).join(',\n');
const fname = createHash('sha256').update(selectors).digest('hex').slice(0,8) + '0';
const fname = uid(selectors) + '0';
if ( globalCSSFileSet.has(fname) === false ) {
globalCSSFileSet.add(fname);
const fpath = `${fname.slice(0,1)}/${fname.slice(1,2)}/${fname.slice(2)}`;
@ -426,7 +456,7 @@ function processCosmeticFilters(assetDetails, mapin) {
const scriptletDealiasingMap = new Map();
let scriptletsMapPromise;
function loadAllScriptlets() {
function loadAllSourceScriptlets() {
if ( scriptletsMapPromise !== undefined ) {
return scriptletsMapPromise;
}
@ -462,8 +492,6 @@ function loadAllScriptlets() {
return scriptletsMapPromise;
}
/******************************************************************************/
const globalPatchedScriptletsSet = new Set();
async function processScriptletFilters(assetDetails, mapin) {
@ -471,7 +499,7 @@ async function processScriptletFilters(assetDetails, mapin) {
// Load all available scriptlets into a key-val map, where the key is the
// scriptlet token, and val is the whole content of the file.
const originalScriptletMap = await loadAllScriptlets();
const originalScriptletMap = await loadAllSourceScriptlets();
const parseArguments = (raw) => {
const out = [];
@ -510,43 +538,113 @@ async function processScriptletFilters(assetDetails, mapin) {
}
};
const patchScriptlet = (filter) => {
return originalScriptletMap.get(filter.token).replace(
/^(\}\)\(\.\.\.)self\.\$args\$(\);)$/m,
`$1${JSON.stringify(filter.args, null, 4)}$2`
);
};
// Generate distinct scriptlet files according to patched scriptlets
let distinctResourceCount = 0;
// For each instance of distinct scriptlet, we will collect distinct
// instances of arguments, and for each distinct set of argument, we
// will collect the set of hostnames for which the scriptlet/args is meant
// to execute. This will allow us a single content script file and the
// scriptlets execution will depend on hostname testing against the
// URL of the document at scriptlet execution time. In the end, we
// should have no more generated content script per subscription than the
// number of distinct source scriptlets.
const scriptletDetails = new Map();
for ( const [ rawFilter, entry ] of mapin ) {
const normalized = parseFilter(rawFilter);
if ( normalized === undefined ) { continue; }
const json = JSON.stringify(normalized);
// ends-with 1 = scriptlet resource
const fname = createHash('sha256').update(json).digest('hex').slice(0,8) + '1';
if ( globalPatchedScriptletsSet.has(fname) === false ) {
globalPatchedScriptletsSet.add(fname);
const scriptlet = patchScriptlet(normalized);
const fpath = `${fname.slice(0,1)}/${fname.slice(1)}`;
writeFile(`${scriptletDir}/${fpath}.js`, scriptlet);
distinctResourceCount += 1;
let argsDetails = scriptletDetails.get(normalized.token);
if ( argsDetails === undefined ) {
argsDetails = new Map();
scriptletDetails.set(normalized.token, argsDetails);
}
const argsHash = JSON.stringify(normalized.args);
let hostnamesDetails = argsDetails.get(argsHash);
if ( hostnamesDetails === undefined ) {
hostnamesDetails = {
a: normalized.args,
y: new Set(),
n: new Set(),
};
}
argsDetails.set(argsHash, hostnamesDetails);
if ( entry.matches ) {
for ( const hn of entry.matches ) {
hostnamesDetails.y.add(hn);
}
}
if ( entry.excludeMatches ) {
for ( const hn of entry.excludeMatches ) {
hostnamesDetails.n.add(hn);
}
}
addScriptingAPIResources(
assetDetails.id,
entry,
'matches',
fname
);
addScriptingAPIResources(
assetDetails.id,
entry,
'excludeMatches',
fname
);
}
let distinctResourceCount = 0;
const jsonReplacer = (k, v) => {
if ( k === 'n' ) {
if ( v.size === 0 ) { return; }
return Array.from(v);
}
if ( v instanceof Set || v instanceof Map ) {
if ( v.size === 0 ) { return; }
return Array.from(v);
}
return v;
};
const toHostnamesMap = (hostnames, hash, out) => {
for ( const hn of hostnames ) {
const existing = out.get(hn);
if ( existing === undefined ) {
out.set(hn, hash);
} else if ( Array.isArray(existing) ) {
existing.push(hash);
} else {
out.set(hn, [ existing, hash ]);
}
}
};
for ( const [ token, argsDetails ] of scriptletDetails ) {
const argsMap = Array.from(argsDetails).map(entry => {
return [
parseInt(uid(entry[0]),16),
{ a: entry[1].a, n: entry[1].n }
];
});
const hostnamesMap = new Map();
for ( const [ argsHash, details ] of argsDetails ) {
toHostnamesMap(details.y, parseInt(uid(argsHash),16), hostnamesMap);
}
const patchedScriptlet = originalScriptletMap.get(token)
.replace(
/\bself\.\$argsMap\$/m,
`${JSON.stringify(argsMap, jsonReplacer)}`
).replace(
/\bself\.\$hostnamesMap\$/m,
`${JSON.stringify(hostnamesMap, jsonReplacer)}`
);
// ends-with 1 = scriptlet resource
const fname = uid(patchedScriptlet) + '1';
if ( globalPatchedScriptletsSet.has(fname) === false ) {
globalPatchedScriptletsSet.add(fname);
writeFile(`${scriptletDir}/${fname}.js`, patchedScriptlet, {});
distinctResourceCount += 1;
}
for ( const details of argsDetails.values() ) {
addScriptingAPIResources(
assetDetails.id,
{ matches: details.y },
'matches',
fname
);
addScriptingAPIResources(
assetDetails.id,
{ excludeMatches: details.n },
'excludeMatches',
fname
);
}
}
log(`Scriptlet entries: ${distinctResourceCount}`);
return distinctResourceCount;
@ -714,16 +812,9 @@ async function main() {
`${JSON.stringify(rulesetDetails, null, 1)}\n`
);
const replacer = (k, v) => {
if ( v instanceof Set || v instanceof Map ) {
return Array.from(v);
}
return v;
};
writeFile(
`${rulesetDir}/scripting-details.json`,
`${JSON.stringify(scriptingDetails, replacer)}\n`
`${JSON.stringify(scriptingDetails, jsonSetMapReplacer)}\n`
);
await Promise.all(writeOps);

37
platform/mv3/scriptlets/abort-current-script.js
View File

@ -33,18 +33,22 @@
/// alias abort-current-inline-script
/// alias acis
try {
/******************************************************************************/
// Important!
// Isolate from global scope
(function() {
/******************************************************************************/
// Issues to mind before changing anything:
// https://github.com/uBlockOrigin/uBlock-issues/issues/2154
(function(
const scriptlet = (
target = '',
needle = '',
context = ''
) {
) => {
if ( target === '' ) { return; }
const reRegexEscape = /[.*+?^${}()|[\]\\]/g;
const reNeedle = (( ) => {
@ -137,9 +141,32 @@ try {
return oe.apply(this, arguments);
}
}.bind();
})(...self.$args$);
};
/******************************************************************************/
} catch(ex) {
const argsMap = new Map(self.$argsMap$);
const hostnamesMap = new Map(self.$hostnamesMap$);
let hn;
try { hn = document.location.hostname; } catch(ex) { }
while ( hn ) {
if ( hostnamesMap.has(hn) ) {
let argsHashes = hostnamesMap.get(hn);
if ( typeof argsHashes === 'number' ) { argsHashes = [ argsHashes ]; }
for ( const argsHash of argsHashes ) {
const details = argsMap.get(argsHash);
if ( details.n && details.n.includes(hn) ) { continue; }
try { scriptlet(...details.a); } catch(ex) {}
}
}
const pos = hn.indexOf('.');
if ( pos === -1 ) { break; }
hn = hn.slice(pos + 1);
}
/******************************************************************************/
})();
/******************************************************************************/

37
platform/mv3/scriptlets/json-prune.js
View File

@ -30,17 +30,21 @@
/// name json-prune
try {
/******************************************************************************/
// Important!
// Isolate from global scope
(function() {
/******************************************************************************/
// https://github.com/uBlockOrigin/uBlock-issues/issues/1545
// - Add support for "remove everything if needle matches" case
(function(
const scriptlet = (
rawPrunePaths = '',
rawNeedlePaths = ''
) {
) => {
const prunePaths = rawPrunePaths !== ''
? rawPrunePaths.split(/ +/)
: [];
@ -113,9 +117,32 @@ try {
return Reflect.apply(...arguments).then(o => pruner(o));
},
});
})(...self.$args$);
};
/******************************************************************************/
} catch(ex) {
const argsMap = new Map(self.$argsMap$);
const hostnamesMap = new Map(self.$hostnamesMap$);
let hn;
try { hn = document.location.hostname; } catch(ex) { }
while ( hn ) {
if ( hostnamesMap.has(hn) ) {
let argsHashes = hostnamesMap.get(hn);
if ( typeof argsHashes === 'number' ) { argsHashes = [ argsHashes ]; }
for ( const argsHash of argsHashes ) {
const details = argsMap.get(argsHash);
if ( details.n && details.n.includes(hn) ) { continue; }
try { scriptlet(...details.a); } catch(ex) {}
}
}
const pos = hn.indexOf('.');
if ( pos === -1 ) { break; }
hn = hn.slice(pos + 1);
}
/******************************************************************************/
})();
/******************************************************************************/

37
platform/mv3/scriptlets/set-constant.js
View File

@ -31,14 +31,18 @@
/// name set-constant
/// alias set
try {
/******************************************************************************/
// Important!
// Isolate from global scope
(function() {
/******************************************************************************/
(function(
const scriptlet = (
chain = '',
cValue = ''
) {
) => {
if ( chain === '' ) { return; }
if ( cValue === 'undefined' ) {
cValue = undefined;
@ -155,9 +159,32 @@ try {
});
};
trapChain(window, chain);
})(...self.$args$);
};
/******************************************************************************/
} catch(ex) {
const argsMap = new Map(self.$argsMap$);
const hostnamesMap = new Map(self.$hostnamesMap$);
let hn;
try { hn = document.location.hostname; } catch(ex) { }
while ( hn ) {
if ( hostnamesMap.has(hn) ) {
let argsHashes = hostnamesMap.get(hn);
if ( typeof argsHashes === 'number' ) { argsHashes = [ argsHashes ]; }
for ( const argsHash of argsHashes ) {
const details = argsMap.get(argsHash);
if ( details.n && details.n.includes(hn) ) { continue; }
try { scriptlet(...details.a); } catch(ex) {}
}
}
const pos = hn.indexOf('.');
if ( pos === -1 ) { break; }
hn = hn.slice(pos + 1);
}
/******************************************************************************/
})();
/******************************************************************************/