/******************************************************************************* uBlock Origin - a browser extension to block requests. Copyright (C) 2017-present Raymond Hill This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see {http://www.gnu.org/licenses/}. Home: https://github.com/gorhill/uBlock */ // For background page 'use strict'; /******************************************************************************/ (function() { // https://github.com/uBlockOrigin/uBlock-issues/issues/407 if ( vAPI.webextFlavor.soup.has('firefox') ) { return; } const extToTypeMap = new Map([ ['eot','font'],['otf','font'],['svg','font'],['ttf','font'],['woff','font'],['woff2','font'], ['mp3','media'],['mp4','media'],['webm','media'], ['gif','image'],['ico','image'],['jpeg','image'],['jpg','image'],['png','image'],['webp','image'] ]); // https://www.reddit.com/r/uBlockOrigin/comments/9vcrk3/bug_in_ubo_1173_betas_when_saving_files_hosted_on/ // Some types can be mapped from 'other', thus include 'other' if and // only if the caller is interested in at least one of those types. const denormalizeTypes = function(aa) { if ( aa.length === 0 ) { return Array.from(vAPI.net.validTypes); } const out = new Set(); let i = aa.length; while ( i-- ) { const type = aa[i]; if ( vAPI.net.validTypes.has(type) ) { out.add(type); } } if ( out.has('other') === false ) { for ( const type of extToTypeMap.values() ) { if ( out.has(type) ) { out.add('other'); break; } } } return Array.from(out); }; const headerValue = function(headers, name) { let i = headers.length; while ( i-- ) { if ( headers[i].name.toLowerCase() === name ) { return headers[i].value.trim(); } } return ''; }; const parsedURL = new URL('https://www.example.org/'); vAPI.net.normalizeDetails = function(details) { // Chromium 63+ supports the `initiator` property, which contains // the URL of the origin from which the network request was made. if ( typeof details.initiator === 'string' && details.initiator !== 'null' ) { details.documentUrl = details.initiator; } let type = details.type; // https://github.com/gorhill/uBlock/issues/1493 // Chromium 49+/WebExtensions support a new request type: `ping`, // which is fired as a result of using `navigator.sendBeacon`. if ( type === 'ping' ) { details.type = 'beacon'; return; } if ( type === 'imageset' ) { details.type = 'image'; return; } // The rest of the function code is to normalize type if ( type !== 'other' ) { return; } // Try to map known "extension" part of URL to request type. parsedURL.href = details.url; const path = parsedURL.pathname, pos = path.indexOf('.', path.length - 6); if ( pos !== -1 && (type = extToTypeMap.get(path.slice(pos + 1))) ) { details.type = type; return; } // Try to extract type from response headers if present. if ( details.responseHeaders ) { type = headerValue(details.responseHeaders, 'content-type'); if ( type.startsWith('font/') ) { details.type = 'font'; return; } if ( type.startsWith('image/') ) { details.type = 'image'; return; } if ( type.startsWith('audio/') || type.startsWith('video/') ) { details.type = 'media'; return; } } }; vAPI.net.denormalizeFilters = function(filters) { const urls = filters.urls || [ '' ]; let types = filters.types; if ( Array.isArray(types) ) { types = denormalizeTypes(types); } if ( (vAPI.net.validTypes.has('websocket')) && (types === undefined || types.indexOf('websocket') !== -1) && (urls.indexOf('') === -1) ) { if ( urls.indexOf('ws://*/*') === -1 ) { urls.push('ws://*/*'); } if ( urls.indexOf('wss://*/*') === -1 ) { urls.push('wss://*/*'); } } return { types, urls }; }; })(); /******************************************************************************/ // https://github.com/gorhill/uBlock/issues/2067 // Experimental: Block everything until uBO is fully ready. vAPI.net.onBeforeReady = vAPI.net.onBeforeReady || (function() { // https://github.com/uBlockOrigin/uBlock-issues/issues/407 if ( vAPI.webextFlavor.soup.has('firefox') ) { return; } let pendings; const handler = function(details) { if ( pendings === undefined ) { return; } if ( details.tabId < 0 ) { return; } pendings.add(details.tabId); return { cancel: true }; }; return { experimental: true, start: function() { pendings = new Set(); browser.webRequest.onBeforeRequest.addListener( handler, { urls: [ 'http://*/*', 'https://*/*' ] }, [ 'blocking' ] ); }, // https://github.com/gorhill/uBlock/issues/2067 // Force-reload tabs for which network requests were blocked // during launch. This can happen only if tabs were "suspended". stop: function() { if ( pendings === undefined ) { return; } browser.webRequest.onBeforeRequest.removeListener(handler); for ( const tabId of pendings ) { vAPI.tabs.reload(tabId); } pendings = undefined; }, }; })(); /******************************************************************************/ // https://github.com/uBlockOrigin/uBlock-issues/issues/548 // Use `X-DNS-Prefetch-Control` to workaround Chromium's disregard of the // setting "Predict network actions to improve page load performance". vAPI.prefetching = (function() { let listening = false; const onHeadersReceived = function(details) { details.responseHeaders.push({ name: 'X-DNS-Prefetch-Control', value: 'off' }); return { responseHeaders: details.responseHeaders }; }; return state => { const wr = chrome.webRequest; if ( state && listening ) { wr.onHeadersReceived.removeListener(onHeadersReceived); listening = false; } else if ( !state && !listening ) { wr.onHeadersReceived.addListener( onHeadersReceived, { urls: [ 'http://*/*', 'https://*/*' ], types: [ 'main_frame', 'sub_frame' ] }, [ 'blocking', 'responseHeaders' ] ); listening = true; } }; })(); /******************************************************************************/