mirror of
https://github.com/gorhill/uBlock.git
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This works only for platforms supporting the return of Promise by network listeners, i.e. only Firefox at this point. When filter lists are reloaded[1], there is a small time window in which some network requests which should have normally been blocked are not being blocked because the static network filtering engine may not have yet loaded all the filters in memory This is now addressed by suspending the network request handler when filter lists are reloaded -- again, this works only on supported platforms. [1] Examples: when a filter list update session completes; when user filters change, when adding/removing filter lists.
146 lines
5.2 KiB
JavaScript
146 lines
5.2 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2017-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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// For background page
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'use strict';
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/******************************************************************************/
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(( ) => {
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// https://github.com/uBlockOrigin/uBlock-issues/issues/407
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if ( vAPI.webextFlavor.soup.has('firefox') === false ) { return; }
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// https://github.com/gorhill/uBlock/issues/2950
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// Firefox 56 does not normalize URLs to ASCII, uBO must do this itself.
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// https://bugzilla.mozilla.org/show_bug.cgi?id=945240
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const evalMustPunycode = ( ) => {
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return vAPI.webextFlavor.soup.has('firefox') &&
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vAPI.webextFlavor.major < 57;
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};
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let mustPunycode = evalMustPunycode();
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// The real actual webextFlavor value may not be set in stone, so listen
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// for possible future changes.
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window.addEventListener('webextFlavor', ( ) => {
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mustPunycode = evalMustPunycode();
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}, { once: true });
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const punycode = self.punycode;
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const reAsciiHostname = /^https?:\/\/[0-9a-z_.:@-]+[/?#]/;
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const parsedURL = new URL('about:blank');
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// Related issues:
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// - https://github.com/gorhill/uBlock/issues/1327
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// - https://github.com/uBlockOrigin/uBlock-issues/issues/128
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// - https://bugzilla.mozilla.org/show_bug.cgi?id=1503721
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// Extend base class to normalize as per platform.
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vAPI.Net = class extends vAPI.Net {
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constructor() {
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super();
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this.pendingRequests = [];
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}
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normalizeDetails(details) {
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if ( mustPunycode && !reAsciiHostname.test(details.url) ) {
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parsedURL.href = details.url;
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details.url = details.url.replace(
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parsedURL.hostname,
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punycode.toASCII(parsedURL.hostname)
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);
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}
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const type = details.type;
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// https://github.com/gorhill/uBlock/issues/1493
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// Chromium 49+/WebExtensions support a new request type: `ping`,
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// which is fired as a result of using `navigator.sendBeacon`.
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if ( type === 'ping' ) {
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details.type = 'beacon';
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return;
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}
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if ( type === 'imageset' ) {
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details.type = 'image';
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return;
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}
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// https://github.com/uBlockOrigin/uBlock-issues/issues/345
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// Re-categorize an embedded object as a `sub_frame` if its
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// content type is that of a HTML document.
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if ( type === 'object' && Array.isArray(details.responseHeaders) ) {
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for ( const header of details.responseHeaders ) {
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if ( header.name.toLowerCase() === 'content-type' ) {
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if ( header.value.startsWith('text/html') ) {
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details.type = 'sub_frame';
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}
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break;
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}
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}
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}
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}
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denormalizeTypes(types) {
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if ( types.length === 0 ) {
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return Array.from(this.validTypes);
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}
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const out = new Set();
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for ( const type of types ) {
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if ( this.validTypes.has(type) ) {
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out.add(type);
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}
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if ( type === 'image' && this.validTypes.has('imageset') ) {
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out.add('imageset');
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}
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if ( type === 'sub_frame' ) {
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out.add('object');
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}
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}
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return Array.from(out);
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}
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suspendOneRequest(details) {
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const pending = {
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details: Object.assign({}, details),
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resolve: undefined,
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promise: undefined
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};
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pending.promise = new Promise(function(resolve) {
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pending.resolve = resolve;
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});
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this.pendingRequests.push(pending);
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return pending.promise;
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}
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unsuspendAllRequests(resolver) {
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const pendingRequests = this.pendingRequests;
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this.pendingRequests = [];
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for ( const entry of pendingRequests ) {
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entry.resolve(resolver(entry.details));
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}
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}
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canSuspend() {
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return true;
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}
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};
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})();
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/******************************************************************************/
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