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91 lines
2.8 KiB
JavaScript
91 lines
2.8 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2015-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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'use strict';
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/******************************************************************************/
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/******************************************************************************/
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µMatrix.logger = (function() {
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let buffer = null;
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let lastReadTime = 0;
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let writePtr = 0;
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// After 60 seconds without being read, a buffer will be considered
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// unused, and thus removed from memory.
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const logBufferObsoleteAfter = 30 * 1000;
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const janitor = ( ) => {
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if (
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buffer !== null &&
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lastReadTime < (Date.now() - logBufferObsoleteAfter)
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) {
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api.enabled = false;
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buffer = null;
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writePtr = 0;
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api.ownerId = undefined;
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vAPI.messaging.broadcast({ what: 'loggerDisabled' });
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}
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if ( buffer !== null ) {
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vAPI.setTimeout(janitor, logBufferObsoleteAfter);
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}
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};
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const boxEntry = function(details) {
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if ( details.tstamp === undefined ) {
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details.tstamp = Date.now();
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}
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return JSON.stringify(details);
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};
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const api = {
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enabled: false,
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ownerId: undefined,
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writeOne: function(details) {
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if ( buffer === null ) { return; }
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if ( writePtr === buffer.length ) {
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buffer.push(boxEntry(details));
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} else {
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buffer[writePtr] = boxEntry(details);
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}
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writePtr += 1;
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},
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readAll: function(ownerId) {
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this.ownerId = ownerId;
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if ( buffer === null ) {
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this.enabled = true;
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buffer = [];
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vAPI.setTimeout(janitor, logBufferObsoleteAfter);
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}
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const out = buffer.slice(0, writePtr);
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writePtr = 0;
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lastReadTime = Date.now();
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return out;
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},
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};
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return api;
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})();
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/******************************************************************************/
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