mirror of
https://github.com/yeongpin/cursor-free-vip.git
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121 lines
4.4 KiB
JavaScript
121 lines
4.4 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a comprehensive, efficient content blocker
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Copyright (C) 2019-present Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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import { parseReplaceFn } from './parse-replace.js';
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import { proxyApplyFn } from './proxy-apply.js';
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import { registerScriptlet } from './base.js';
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import { safeSelf } from './safe-self.js';
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import { validateConstantFn } from './set-constant.js';
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/**
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* @scriptlet trusted-replace-argument.js
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*
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* @description
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* Replace an argument passed to a method. Requires a trusted source.
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*
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* @param propChain
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* The property chain to the function which argument must be replaced when
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* called.
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*
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* @param argposRaw
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* The zero-based position of the argument in the argument list. Use a negative
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* number for a position relative to the last argument. Use literal `this` to
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* replace the value used in `prototype`-based methods.
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*
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* @param argraw
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* The replacement value, validated using the same heuristic as with the
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* `set-constant.js` scriptlet.
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* If the replacement value matches `json:...`, the value will be the
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* json-parsed string after `json:`.
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* If the replacement value matches `repl:/.../.../`, the target argument will
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* be replaced according the regex-replacement directive following `repl:`
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*
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* @param [, condition, pattern]
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* Optional. The replacement will occur only when pattern matches the target
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* argument.
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*
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* */
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export function trustedReplaceArgument(
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propChain = '',
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argposRaw = '',
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argraw = ''
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) {
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if ( propChain === '' ) { return; }
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const safe = safeSelf();
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const logPrefix = safe.makeLogPrefix('trusted-replace-argument', propChain, argposRaw, argraw);
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const argoffset = parseInt(argposRaw, 10) || 0;
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const extraArgs = safe.getExtraArgs(Array.from(arguments), 3);
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const replacer = argraw.startsWith('repl:/') &&
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parseReplaceFn(argraw.slice(5)) || undefined;
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const value = replacer === undefined &&
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validateConstantFn(true, argraw, extraArgs) || undefined;
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const reCondition = extraArgs.condition
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? safe.patternToRegex(extraArgs.condition)
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: /^/;
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const getArg = context => {
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if ( argposRaw === 'this' ) { return context.thisArg; }
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const { callArgs } = context;
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const argpos = argoffset >= 0 ? argoffset : callArgs.length - argoffset;
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if ( argpos < 0 || argpos >= callArgs.length ) { return; }
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context.private = { argpos };
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return callArgs[argpos];
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};
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const setArg = (context, value) => {
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if ( argposRaw === 'this' ) {
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if ( value !== context.thisArg ) {
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context.thisArg = value;
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}
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} else if ( context.private ) {
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context.callArgs[context.private.argpos] = value;
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}
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};
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proxyApplyFn(propChain, function(context) {
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if ( argposRaw === '' ) {
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safe.uboLog(logPrefix, `Arguments:\n${context.callArgs.join('\n')}`);
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return context.reflect();
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}
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const argBefore = getArg(context);
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if ( safe.RegExp_test.call(reCondition, argBefore) === false ) {
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return context.reflect();
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}
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const argAfter = replacer && typeof argBefore === 'string'
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? argBefore.replace(replacer.re, replacer.replacement)
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: value;
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if ( argAfter !== argBefore ) {
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setArg(context, argAfter);
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safe.uboLog(logPrefix, `Replaced argument:\nBefore: ${JSON.stringify(argBefore)}\nAfter: ${argAfter}`);
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}
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return context.reflect();
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});
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}
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registerScriptlet(trustedReplaceArgument, {
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name: 'trusted-replace-argument.js',
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requiresTrust: true,
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dependencies: [
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parseReplaceFn,
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proxyApplyFn,
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safeSelf,
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validateConstantFn,
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],
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});
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