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uBlock/platform/chromium/vapi-background.js

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/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2014-2015 The uBlock Origin authors
Copyright (C) 2014-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';
/******************************************************************************/
{
// >>>>> start of local scope
/******************************************************************************/
/******************************************************************************/
const browser = self.browser;
const manifest = browser.runtime.getManifest();
vAPI.cantWebsocket =
browser.webRequest.ResourceType instanceof Object === false ||
browser.webRequest.ResourceType.WEBSOCKET !== 'websocket';
vAPI.canWASM = vAPI.webextFlavor.soup.has('chromium') === false;
if ( vAPI.canWASM === false ) {
const csp = manifest.content_security_policy;
vAPI.canWASM = csp !== undefined && csp.indexOf("'wasm-eval'") !== -1;
}
vAPI.supportsUserStylesheets = vAPI.webextFlavor.soup.has('user_stylesheet');
// The real actual webextFlavor value may not be set in stone, so listen
// for possible future changes.
window.addEventListener('webextFlavor', function() {
vAPI.supportsUserStylesheets =
vAPI.webextFlavor.soup.has('user_stylesheet');
}, { once: true });
/******************************************************************************/
vAPI.app = {
name: manifest.name.replace(/ dev\w+ build/, ''),
version: (( ) => {
let version = manifest.version;
const match = /(\d+\.\d+\.\d+)(?:\.(\d+))?/.exec(version);
if ( match && match[2] ) {
const v = parseInt(match[2], 10);
version = match[1] + (v < 100 ? 'b' + v : 'rc' + (v - 100));
}
return version;
})(),
intFromVersion: function(s) {
const parts = s.match(/(?:^|\.|b|rc)\d+/g);
if ( parts === null ) { return 0; }
let vint = 0;
for ( let i = 0; i < 4; i++ ) {
const pstr = parts[i] || '';
let pint;
if ( pstr === '' ) {
pint = 0;
} else if ( pstr.startsWith('.') || pstr.startsWith('b') ) {
pint = parseInt(pstr.slice(1), 10);
} else if ( pstr.startsWith('rc') ) {
pint = parseInt(pstr.slice(2), 10) + 100;
} else {
pint = parseInt(pstr, 10);
}
vint = vint * 1000 + pint;
}
return vint;
},
restart: function() {
browser.runtime.reload();
},
};
/******************************************************************************/
/******************************************************************************/
vAPI.storage = webext.storage.local;
/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/uMatrix/issues/234
// https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/privacy/network
// https://github.com/gorhill/uBlock/issues/2048
// Do not mess up with existing settings if not assigning them stricter
// values.
vAPI.browserSettings = (( ) => {
// Not all platforms support `browser.privacy`.
const bp = webext.privacy;
if ( bp instanceof Object === false ) { return; }
return {
// Whether the WebRTC-related privacy API is crashy is an open question
// only for Chromium proper (because it can be compiled without the
// WebRTC feature): hence avoid overhead of the evaluation (which uses
// an iframe) for platforms where it's a non-issue.
// https://github.com/uBlockOrigin/uBlock-issues/issues/9
// Some Chromium builds are made to look like a Chrome build.
webRTCSupported: vAPI.webextFlavor.soup.has('chromium') === false || undefined,
// Calling with `true` means IP address leak is not prevented.
// https://github.com/gorhill/uBlock/issues/533
// We must first check wether this Chromium-based browser was compiled
// with WebRTC support. To do this, we use an iframe, this way the
// empty RTCPeerConnection object we create to test for support will
// be properly garbage collected. This prevents issues such as
// a computer unable to enter into sleep mode, as reported in the
// Chrome store:
// https://github.com/gorhill/uBlock/issues/533#issuecomment-167931681
setWebrtcIPAddress: function(setting) {
// We don't know yet whether this browser supports WebRTC: find out.
if ( this.webRTCSupported === undefined ) {
// If asked to leave WebRTC setting alone at this point in the
// code, this means we never grabbed the setting in the first
// place.
if ( setting ) { return; }
this.webRTCSupported = { setting: setting };
let iframe = document.createElement('iframe');
const messageHandler = ev => {
if ( ev.origin !== self.location.origin ) { return; }
window.removeEventListener('message', messageHandler);
const setting = this.webRTCSupported.setting;
this.webRTCSupported = ev.data === 'webRTCSupported';
this.setWebrtcIPAddress(setting);
iframe.parentNode.removeChild(iframe);
iframe = null;
};
window.addEventListener('message', messageHandler);
iframe.src = 'is-webrtc-supported.html';
document.body.appendChild(iframe);
return;
}
// We are waiting for a response from our iframe. This makes the code
// safe to re-entrancy.
if ( typeof this.webRTCSupported === 'object' ) {
this.webRTCSupported.setting = setting;
return;
}
// https://github.com/gorhill/uBlock/issues/533
// WebRTC not supported: `webRTCMultipleRoutesEnabled` can NOT be
// safely accessed. Accessing the property will cause full browser
// crash.
if ( this.webRTCSupported !== true ) { return; }
const bpn = bp.network;
if ( setting ) {
bpn.webRTCIPHandlingPolicy.clear({
scope: 'regular',
});
} else {
// https://github.com/uBlockOrigin/uAssets/issues/333#issuecomment-289426678
// Leverage virtuous side-effect of strictest setting.
// https://github.com/gorhill/uBlock/issues/3009
// Firefox currently works differently, use
// `default_public_interface_only` for now.
bpn.webRTCIPHandlingPolicy.set({
value: vAPI.webextFlavor.soup.has('chromium')
? 'disable_non_proxied_udp'
: 'default_public_interface_only',
scope: 'regular',
});
}
},
set: function(details) {
for ( const setting in details ) {
if ( details.hasOwnProperty(setting) === false ) { continue; }
switch ( setting ) {
case 'prefetching':
const enabled = !!details[setting];
if ( enabled ) {
bp.network.networkPredictionEnabled.clear({
scope: 'regular',
});
} else {
bp.network.networkPredictionEnabled.set({
value: false,
scope: 'regular',
});
}
if ( vAPI.prefetching instanceof Function ) {
vAPI.prefetching(enabled);
}
break;
case 'hyperlinkAuditing':
if ( !!details[setting] ) {
bp.websites.hyperlinkAuditingEnabled.clear({
scope: 'regular',
});
} else {
bp.websites.hyperlinkAuditingEnabled.set({
value: false,
scope: 'regular',
});
}
break;
case 'webrtcIPAddress':
this.setWebrtcIPAddress(!!details[setting]);
break;
default:
break;
}
}
}
};
})();
/******************************************************************************/
/******************************************************************************/
vAPI.isBehindTheSceneTabId = function(tabId) {
return tabId < 0;
};
vAPI.unsetTabId = 0;
vAPI.noTabId = -1; // definitely not any existing tab
// To ensure we always use a good tab id
const toTabId = function(tabId) {
return typeof tabId === 'number' && isNaN(tabId) === false
? tabId
: 0;
};
// https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webNavigation
// https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs
vAPI.Tabs = class {
constructor() {
browser.webNavigation.onCreatedNavigationTarget.addListener(details => {
if ( typeof details.url !== 'string' ) {
details.url = '';
}
if ( /^https?:\/\//.test(details.url) === false ) {
details.frameId = 0;
details.url = this.sanitizeURL(details.url);
this.onNavigation(details);
}
this.onCreated(details);
});
browser.webNavigation.onCommitted.addListener(details => {
details.url = this.sanitizeURL(details.url);
this.onNavigation(details);
});
// https://github.com/gorhill/uBlock/issues/3073
// Fall back to `tab.url` when `changeInfo.url` is not set.
browser.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
if ( typeof changeInfo.url !== 'string' ) {
changeInfo.url = tab && tab.url;
}
if ( changeInfo.url ) {
changeInfo.url = this.sanitizeURL(changeInfo.url);
}
this.onUpdated(tabId, changeInfo, tab);
});
browser.tabs.onActivated.addListener(details => {
this.onActivated(details);
});
// https://github.com/uBlockOrigin/uBlock-issues/issues/151
// https://github.com/uBlockOrigin/uBlock-issues/issues/680#issuecomment-515215220
if ( browser.windows instanceof Object ) {
browser.windows.onFocusChanged.addListener(async windowId => {
if ( windowId === browser.windows.WINDOW_ID_NONE ) { return; }
const tabs = await vAPI.tabs.query({ active: true, windowId });
if ( tabs.length === 0 ) { return; }
const tab = tabs[0];
this.onActivated({ tabId: tab.id, windowId: tab.windowId });
});
}
browser.tabs.onRemoved.addListener((tabId, details) => {
this.onClosed(tabId, details);
});
}
async executeScript() {
let result;
try {
result = await webext.tabs.executeScript(...arguments);
}
catch(reason) {
}
return Array.isArray(result) ? result : [];
}
async get(tabId) {
if ( tabId === null ) {
return this.getCurrent();
}
if ( tabId <= 0 ) { return null; }
let tab;
try {
tab = await webext.tabs.get(tabId);
}
catch(reason) {
}
return tab instanceof Object ? tab : null;
}
async getCurrent() {
const tabs = await this.query({ active: true, currentWindow: true });
return tabs.length !== 0 ? tabs[0] : null;
}
async insertCSS() {
try {
await webext.tabs.insertCSS(...arguments);
}
catch(reason) {
}
}
async query(queryInfo) {
let tabs;
try {
tabs = await webext.tabs.query(queryInfo);
}
catch(reason) {
}
return Array.isArray(tabs) ? tabs : [];
}
async removeCSS() {
try {
await webext.tabs.removeCSS(...arguments);
}
catch(reason) {
}
}
// Properties of the details object:
// - url: 'URL', => the address that will be opened
// - index: -1, => undefined: end of the list, -1: following tab,
// or after index
// - active: false, => opens the tab... in background: true,
// foreground: undefined
// - popup: 'popup' => open in a new window
async create(url, details) {
if ( details.active === undefined ) {
details.active = true;
}
const subWrapper = async ( ) => {
const updateDetails = {
url: url,
active: !!details.active
};
// Opening a tab from incognito window won't focus the window
// in which the tab was opened
const focusWindow = tab => {
if ( tab.active && vAPI.windows instanceof Object ) {
vAPI.windows.update(tab.windowId, { focused: true });
}
};
if ( !details.tabId ) {
if ( details.index !== undefined ) {
updateDetails.index = details.index;
}
browser.tabs.create(updateDetails, focusWindow);
return;
}
// update doesn't accept index, must use move
const tab = await vAPI.tabs.update(
toTabId(details.tabId),
updateDetails
);
// if the tab doesn't exist
if ( tab === null ) {
browser.tabs.create(updateDetails, focusWindow);
} else if ( details.index !== undefined ) {
browser.tabs.move(tab.id, { index: details.index });
}
};
// Open in a standalone window
//
// https://github.com/uBlockOrigin/uBlock-issues/issues/168#issuecomment-413038191
// Not all platforms support vAPI.windows.
//
// For some reasons, some platforms do not honor the left,top
// position when specified. I found that further calling
// windows.update again with the same position _may_ help.
if ( details.popup !== undefined && vAPI.windows instanceof Object ) {
const createDetails = {
url: details.url,
type: details.popup,
};
if ( details.box instanceof Object ) {
Object.assign(createDetails, details.box);
}
const win = await vAPI.windows.create(createDetails);
if ( win === null ) { return; }
if ( details.box instanceof Object === false ) { return; }
if (
win.left === details.box.left &&
win.top === details.box.top
) {
return;
}
vAPI.windows.update(win.id, {
left: details.box.left,
top: details.box.top
});
return;
}
if ( details.index !== -1 ) {
subWrapper();
return;
}
const tab = await vAPI.tabs.getCurrent();
if ( tab !== null ) {
details.index = tab.index + 1;
} else {
details.index = undefined;
}
subWrapper();
}
// Properties of the details object:
// - url: 'URL', => the address that will be opened
// - tabId: 1, => the tab is used if set, instead of creating a new one
// - index: -1, => undefined: end of the list, -1: following tab, or
// after index
// - active: false, => opens the tab in background - true and undefined:
// foreground
// - select: true, => if a tab is already opened with that url, then select
// it instead of opening a new one
// - popup: true => open in a new window
async open(details) {
let targetURL = details.url;
if ( typeof targetURL !== 'string' || targetURL === '' ) {
return null;
}
// extension pages
if ( /^[\w-]{2,}:/.test(targetURL) !== true ) {
targetURL = vAPI.getURL(targetURL);
}
if ( !details.select ) {
this.create(targetURL, details);
return;
}
// https://github.com/gorhill/uBlock/issues/3053#issuecomment-332276818
// Do not try to lookup uBO's own pages with FF 55 or less.
if (
vAPI.webextFlavor.soup.has('firefox') &&
vAPI.webextFlavor.major < 56
) {
this.create(targetURL, details);
return;
}
// https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/query#Parameters
// "Note that fragment identifiers are not matched."
// Fragment identifiers ARE matched -- we need to remove the fragment.
const pos = targetURL.indexOf('#');
const targetURLWithoutHash = pos === -1
? targetURL
: targetURL.slice(0, pos);
const tabs = await vAPI.tabs.query({ url: targetURLWithoutHash });
if ( tabs.length === 0 ) {
this.create(targetURL, details);
return;
}
let tab = tabs[0];
const updateDetails = { active: true };
// https://github.com/uBlockOrigin/uBlock-issues/issues/592
if ( tab.url.startsWith(targetURL) === false ) {
updateDetails.url = targetURL;
}
tab = await vAPI.tabs.update(tab.id, updateDetails);
if ( vAPI.windows instanceof Object === false ) { return; }
vAPI.windows.update(tab.windowId, { focused: true });
}
async update() {
let tab;
try {
tab = await webext.tabs.update(...arguments);
}
catch (reason) {
}
return tab instanceof Object ? tab : null;
}
// Replace the URL of a tab. Noop if the tab does not exist.
replace(tabId, url) {
tabId = toTabId(tabId);
if ( tabId === 0 ) { return; }
let targetURL = url;
// extension pages
if ( /^[\w-]{2,}:/.test(targetURL) !== true ) {
targetURL = vAPI.getURL(targetURL);
}
vAPI.tabs.update(tabId, { url: targetURL });
}
async remove(tabId) {
tabId = toTabId(tabId);
if ( tabId === 0 ) { return; }
try {
await webext.tabs.remove(tabId);
}
catch (reason) {
}
}
async reload(tabId, bypassCache = false) {
tabId = toTabId(tabId);
if ( tabId === 0 ) { return; }
try {
await webext.tabs.reload(
tabId,
{ bypassCache: bypassCache === true }
);
}
catch (reason) {
}
}
async select(tabId) {
tabId = toTabId(tabId);
if ( tabId === 0 ) { return; }
const tab = await vAPI.tabs.update(tabId, { active: true });
if ( tab === null ) { return; }
if ( vAPI.windows instanceof Object === false ) { return; }
vAPI.windows.update(tab.windowId, { focused: true });
}
// https://forums.lanik.us/viewtopic.php?f=62&t=32826
// Chromium-based browsers: sanitize target URL. I've seen data: URI with
// newline characters in standard fields, possibly as a way of evading
// filters. As per spec, there should be no whitespaces in a data: URI's
// standard fields.
sanitizeURL(url) {
if ( url.startsWith('data:') === false ) { return url; }
const pos = url.indexOf(',');
if ( pos === -1 ) { return url; }
const s = url.slice(0, pos);
if ( s.search(/\s/) === -1 ) { return url; }
return s.replace(/\s+/, '') + url.slice(pos);
}
onActivated(/* details */) {
}
onClosed(/* tabId, details */) {
}
onCreated(/* details */) {
}
onNavigation(/* details */) {
}
onUpdated(/* tabId, changeInfo, tab */) {
}
};
/******************************************************************************/
/******************************************************************************/
if ( webext.windows instanceof Object ) {
vAPI.windows = {
get: async function() {
let win;
try {
win = await webext.windows.get(...arguments);
}
catch (reason) {
}
return win instanceof Object ? win : null;
},
create: async function() {
let win;
try {
win = await webext.windows.create(...arguments);
}
catch (reason) {
}
return win instanceof Object ? win : null;
},
update: async function() {
let win;
try {
win = await webext.windows.update(...arguments);
}
catch (reason) {
}
return win instanceof Object ? win : null;
},
};
}
/******************************************************************************/
/******************************************************************************/
if ( webext.browserAction instanceof Object ) {
vAPI.browserAction = {
setTitle: async function() {
try {
await webext.browserAction.setTitle(...arguments);
}
catch (reason) {
}
},
};
// Not supported on Firefox for Android
if ( webext.browserAction.setIcon ) {
vAPI.browserAction.setBadgeTextColor = async function() {
try {
await webext.browserAction.setBadgeTextColor(...arguments);
}
catch (reason) {
}
};
vAPI.browserAction.setBadgeBackgroundColor = async function() {
try {
await webext.browserAction.setBadgeBackgroundColor(...arguments);
}
catch (reason) {
}
};
vAPI.browserAction.setBadgeText = async function() {
try {
await webext.browserAction.setBadgeText(...arguments);
}
catch (reason) {
}
};
vAPI.browserAction.setIcon = async function() {
try {
await webext.browserAction.setIcon(...arguments);
}
catch (reason) {
}
};
}
}
/******************************************************************************/
/******************************************************************************/
// Must read: https://code.google.com/p/chromium/issues/detail?id=410868#c8
// https://github.com/chrisaljoudi/uBlock/issues/19
// https://github.com/chrisaljoudi/uBlock/issues/207
// Since we may be called asynchronously, the tab id may not exist
// anymore, so this ensures it does still exist.
// https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/browserAction#Browser_compatibility
// Firefox for Android does no support browser.browserAction.setIcon().
// Performance: use ImageData for platforms supporting it.
// https://github.com/uBlockOrigin/uBlock-issues/issues/32
// Ensure ImageData for toolbar icon is valid before use.
vAPI.setIcon = (( ) => {
const browserAction = vAPI.browserAction;
const titleTemplate =
browser.runtime.getManifest().browser_action.default_title +
' ({badge})';
const icons = [
{ path: { '16': 'img/icon_16-off.png', '32': 'img/icon_32-off.png' } },
{ path: { '16': 'img/icon_16.png', '32': 'img/icon_32.png' } },
];
(( ) => {
if ( browserAction.setIcon === undefined ) { return; }
// The global badge text and background color.
if ( browserAction.setBadgeBackgroundColor !== undefined ) {
browserAction.setBadgeBackgroundColor({ color: '#666666' });
}
if ( browserAction.setBadgeTextColor !== undefined ) {
browserAction.setBadgeTextColor({ color: '#FFFFFF' });
}
// As of 2018-05, benchmarks show that only Chromium benefits for sure
// from using ImageData.
//
// Chromium creates a new ImageData instance every call to setIcon
// with paths:
// https://cs.chromium.org/chromium/src/extensions/renderer/resources/set_icon.js?l=56&rcl=99be185c25738437ecfa0dafba72a26114196631
//
// Firefox uses an internal cache for each setIcon's paths:
// https://searchfox.org/mozilla-central/rev/5ff2d7683078c96e4b11b8a13674daded935aa44/browser/components/extensions/parent/ext-browserAction.js#631
if ( vAPI.webextFlavor.soup.has('chromium') === false ) { return; }
const imgs = [];
for ( let i = 0; i < icons.length; i++ ) {
const path = icons[i].path;
for ( const key in path ) {
if ( path.hasOwnProperty(key) === false ) { continue; }
imgs.push({ i: i, p: key });
}
}
// https://github.com/uBlockOrigin/uBlock-issues/issues/296
const safeGetImageData = function(ctx, w, h) {
let data;
try {
data = ctx.getImageData(0, 0, w, h);
} catch(ex) {
}
return data;
};
const onLoaded = function() {
for ( const img of imgs ) {
if ( img.r.complete === false ) { return; }
}
const ctx = document.createElement('canvas').getContext('2d');
const iconData = [ null, null ];
for ( const img of imgs ) {
const w = img.r.naturalWidth, h = img.r.naturalHeight;
ctx.width = w; ctx.height = h;
ctx.clearRect(0, 0, w, h);
ctx.drawImage(img.r, 0, 0);
if ( iconData[img.i] === null ) { iconData[img.i] = {}; }
const imgData = safeGetImageData(ctx, w, h);
if (
imgData instanceof Object === false ||
imgData.data instanceof Uint8ClampedArray === false ||
imgData.data[0] !== 0 ||
imgData.data[1] !== 0 ||
imgData.data[2] !== 0 ||
imgData.data[3] !== 0
) {
return;
}
iconData[img.i][img.p] = imgData;
}
for ( let i = 0; i < iconData.length; i++ ) {
if ( iconData[i] ) {
icons[i] = { imageData: iconData[i] };
}
}
};
for ( const img of imgs ) {
img.r = new Image();
img.r.addEventListener('load', onLoaded, { once: true });
img.r.src = icons[img.i].path[img.p];
}
})();
// parts: bit 0 = icon
// bit 1 = badge text
// bit 2 = badge color
// bit 3 = hide badge
return async function(tabId, details) {
tabId = toTabId(tabId);
if ( tabId === 0 ) { return; }
const tab = await vAPI.tabs.get(tabId);
if ( tab === null ) { return; }
const { parts, state, badge, color } = details;
if ( browserAction.setIcon !== undefined ) {
if ( parts === undefined || (parts & 0b0001) !== 0 ) {
browserAction.setIcon(
Object.assign({ tabId: tab.id }, icons[state])
);
}
if ( (parts & 0b0010) !== 0 ) {
browserAction.setBadgeText({
tabId: tab.id,
text: (parts & 0b1000) === 0 ? badge : ''
});
}
if ( (parts & 0b0100) !== 0 ) {
browserAction.setBadgeBackgroundColor({ tabId: tab.id, color });
}
}
if ( browserAction.setTitle !== undefined ) {
browserAction.setTitle({
tabId: tab.id,
title: titleTemplate.replace(
'{badge}',
state === 1 ? (badge !== '' ? badge : '0') : 'off'
)
});
}
if ( vAPI.contextMenu instanceof Object ) {
vAPI.contextMenu.onMustUpdate(tabId);
}
};
})();
browser.browserAction.onClicked.addListener(function(tab) {
vAPI.tabs.open({
select: true,
url: 'popup.html?tabId=' + tab.id + '&responsive=1'
});
});
/******************************************************************************/
/******************************************************************************/
// https://github.com/uBlockOrigin/uBlock-issues/issues/710
// uBO uses only ports to communicate with its auxiliary pages and
// content scripts. Whether a message can trigger a privileged operation is
// decided based on whether the port from which a message is received is
// privileged, which is a status evaluated once, at port connection time.
vAPI.messaging = {
ports: new Map(),
listeners: new Map(),
defaultHandler: null,
PRIVILEGED_URL: vAPI.getURL(''),
NOOPFUNC: function(){},
UNHANDLED: 'vAPI.messaging.notHandled',
listen: function(details) {
this.listeners.set(details.name, {
fn: details.listener,
privileged: details.privileged === true
});
},
onPortDisconnect: function(port) {
this.ports.delete(port.name);
},
onPortConnect: function(port) {
port.onDisconnect.addListener(
port => this.onPortDisconnect(port)
);
port.onMessage.addListener(
(request, port) => this.onPortMessage(request, port)
);
this.ports.set(port.name, {
port,
privileged: port.sender.url.startsWith(this.PRIVILEGED_URL)
});
},
setup: function(defaultHandler) {
if ( this.defaultHandler !== null ) { return; }
if ( typeof defaultHandler !== 'function' ) {
defaultHandler = function() {
return this.UNHANDLED;
};
}
this.defaultHandler = defaultHandler;
browser.runtime.onConnect.addListener(
port => this.onPortConnect(port)
);
// https://bugzilla.mozilla.org/show_bug.cgi?id=1392067
// Workaround: manually remove ports matching removed tab.
if (
vAPI.webextFlavor.soup.has('firefox') &&
vAPI.webextFlavor.major < 61
) {
browser.tabs.onRemoved.addListener(tabId => {
for ( const { port } of this.ports.values() ) {
const tab = port.sender && port.sender.tab;
if ( !tab ) { continue; }
if ( tab.id === tabId ) {
this.onPortDisconnect(port);
}
}
});
}
},
broadcast: function(message) {
const messageWrapper = { broadcast: true, msg: message };
for ( const { port } of this.ports.values() ) {
try {
port.postMessage(messageWrapper);
} catch(ex) {
this.ports.delete(port.name);
}
}
},
onFrameworkMessage: function(request, port, callback) {
const sender = port && port.sender;
if ( !sender ) { return; }
const tabId = sender.tab && sender.tab.id || undefined;
const msg = request.msg;
switch ( msg.what ) {
case 'connectionAccepted':
case 'connectionRefused': {
const toPort = this.ports.get(msg.fromToken);
if ( toPort !== undefined ) {
msg.tabId = tabId;
toPort.port.postMessage(request);
} else {
msg.what = 'connectionBroken';
port.postMessage(request);
}
break;
}
case 'connectionRequested':
msg.tabId = tabId;
for ( const { port: toPort } of this.ports.values() ) {
if ( toPort === port ) { continue; }
toPort.postMessage(request);
}
break;
case 'connectionBroken':
case 'connectionCheck':
case 'connectionMessage': {
const toPort = this.ports.get(
port.name === msg.fromToken ? msg.toToken : msg.fromToken
);
if ( toPort !== undefined ) {
msg.tabId = tabId;
toPort.port.postMessage(request);
} else {
msg.what = 'connectionBroken';
port.postMessage(request);
}
break;
}
case 'extendClient':
vAPI.tabs.executeScript(tabId, {
file: '/js/vapi-client-extra.js',
}).then(( ) => {
callback();
});
break;
case 'userCSS':
if ( tabId === undefined ) { break; }
const details = {
code: undefined,
frameId: sender.frameId,
matchAboutBlank: true
};
if ( vAPI.supportsUserStylesheets ) {
details.cssOrigin = 'user';
}
if ( msg.add ) {
details.runAt = 'document_start';
}
const promises = [];
for ( const cssText of msg.add ) {
details.code = cssText;
promises.push(vAPI.tabs.insertCSS(tabId, details));
}
if ( typeof webext.tabs.removeCSS === 'function' ) {
for ( const cssText of msg.remove ) {
details.code = cssText;
promises.push(vAPI.tabs.removeCSS(tabId, details));
}
}
Promise.all(promises).then(( ) => {
callback();
});
break;
}
},
// Use a wrapper to avoid closure and to allow reuse.
CallbackWrapper: class {
constructor(messaging, port, msgId) {
this.messaging = messaging;
this.callback = this.proxy.bind(this); // bind once
this.init(port, msgId);
}
init(port, msgId) {
this.port = port;
this.msgId = msgId;
return this;
}
proxy(response) {
// https://github.com/chrisaljoudi/uBlock/issues/383
if ( this.messaging.ports.has(this.port.name) ) {
this.port.postMessage({
msgId: this.msgId,
msg: response !== undefined ? response : null,
});
}
// Store for reuse
this.port = null;
this.messaging.callbackWrapperJunkyard.push(this);
}
},
callbackWrapperJunkyard: [],
callbackWrapperFactory: function(port, msgId) {
return this.callbackWrapperJunkyard.length !== 0
? this.callbackWrapperJunkyard.pop().init(port, msgId)
: new this.CallbackWrapper(this, port, msgId);
},
onPortMessage: function(request, port) {
// prepare response
let callback = this.NOOPFUNC;
if ( request.msgId !== undefined ) {
callback = this.callbackWrapperFactory(port, request.msgId).callback;
}
// Content process to main process: framework handler.
if ( request.channel === 'vapi' ) {
this.onFrameworkMessage(request, port, callback);
return;
}
// Auxiliary process to main process: specific handler
const fromDetails = this.ports.get(port.name);
if ( fromDetails === undefined ) { return; }
const listenerDetails = this.listeners.get(request.channel);
let r = this.UNHANDLED;
if (
(listenerDetails !== undefined) &&
(listenerDetails.privileged === false || fromDetails.privileged)
) {
r = listenerDetails.fn(request.msg, port.sender, callback);
}
if ( r !== this.UNHANDLED ) { return; }
// Auxiliary process to main process: default handler
if ( fromDetails.privileged ) {
r = this.defaultHandler(request.msg, port.sender, callback);
if ( r !== this.UNHANDLED ) { return; }
}
// Auxiliary process to main process: no handler
log.info(
`vAPI.messaging.onPortMessage > unhandled request: ${JSON.stringify(request.msg)}`,
request
);
// Need to callback anyways in case caller expected an answer, or
// else there is a memory leak on caller's side
callback();
},
};
/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/3474
// https://github.com/gorhill/uBlock/issues/2823
// Foil ability of web pages to identify uBO through
// its web accessible resources.
// https://github.com/gorhill/uBlock/issues/3497
// Prevent web pages from interfering with uBO's element picker
// https://github.com/uBlockOrigin/uBlock-issues/issues/550
// Support using a new secret for every network request.
vAPI.warSecret = (( ) => {
const generateSecret = ( ) => {
return Math.floor(Math.random() * 982451653 + 982451653).toString(36);
};
const root = vAPI.getURL('/');
const secrets = [];
let lastSecretTime = 0;
const guard = function(details) {
const url = details.url;
const pos = secrets.findIndex(secret =>
url.lastIndexOf(`?secret=${secret}`) !== -1
);
if ( pos === -1 ) {
return { redirectUrl: root };
}
secrets.splice(pos, 1);
};
browser.webRequest.onBeforeRequest.addListener(
guard,
{
urls: [ root + 'web_accessible_resources/*' ]
},
[ 'blocking' ]
);
return ( ) => {
if ( secrets.length !== 0 ) {
if ( (Date.now() - lastSecretTime) > 5000 ) {
secrets.splice(0);
} else if ( secrets.length > 256 ) {
secrets.splice(0, secrets.length - 192);
}
}
lastSecretTime = Date.now();
const secret = generateSecret();
secrets.push(secret);
return `?secret=${secret}`;
};
})();
/******************************************************************************/
vAPI.Net = class {
constructor() {
this.validTypes = new Set();
{
const wrrt = browser.webRequest.ResourceType;
for ( const typeKey in wrrt ) {
if ( wrrt.hasOwnProperty(typeKey) ) {
this.validTypes.add(wrrt[typeKey]);
}
}
}
this.suspendableListener = undefined;
this.listenerMap = new WeakMap();
this.suspendDepth = 0;
browser.webRequest.onBeforeRequest.addListener(
details => {
this.normalizeDetails(details);
if ( this.suspendDepth === 0 || details.tabId < 0 ) {
if ( this.suspendableListener === undefined ) { return; }
return this.suspendableListener(details);
}
return this.suspendOneRequest(details);
},
this.denormalizeFilters({ urls: [ 'http://*/*', 'https://*/*' ] }),
[ 'blocking' ]
);
}
normalizeDetails(/* details */) {
}
denormalizeFilters(filters) {
const urls = filters.urls || [ '<all_urls>' ];
let types = filters.types;
if ( Array.isArray(types) ) {
types = this.denormalizeTypes(types);
}
if (
(this.validTypes.has('websocket')) &&
(types === undefined || types.indexOf('websocket') !== -1) &&
(urls.indexOf('<all_urls>') === -1)
) {
if ( urls.indexOf('ws://*/*') === -1 ) {
urls.push('ws://*/*');
}
if ( urls.indexOf('wss://*/*') === -1 ) {
urls.push('wss://*/*');
}
}
return { types, urls };
}
denormalizeTypes(types) {
return types;
}
addListener(which, clientListener, filters, options) {
const actualFilters = this.denormalizeFilters(filters);
const actualListener = this.makeNewListenerProxy(clientListener);
browser.webRequest[which].addListener(
actualListener,
actualFilters,
options
);
}
setSuspendableListener(listener) {
this.suspendableListener = listener;
}
removeListener(which, clientListener) {
const actualListener = this.listenerMap.get(clientListener);
if ( actualListener === undefined ) { return; }
this.listenerMap.delete(clientListener);
browser.webRequest[which].removeListener(actualListener);
}
makeNewListenerProxy(clientListener) {
const actualListener = details => {
this.normalizeDetails(details);
return clientListener(details);
};
this.listenerMap.set(clientListener, actualListener);
return actualListener;
}
suspendOneRequest() {
}
unsuspendAllRequests() {
}
suspend(force = false) {
if ( this.canSuspend() || force ) {
this.suspendDepth += 1;
}
}
unsuspend(all = false) {
if ( this.suspendDepth === 0 ) { return; }
if ( all ) {
this.suspendDepth = 0;
} else {
this.suspendDepth -= 1;
}
if ( this.suspendDepth !== 0 ) { return; }
this.unsuspendAllRequests(this.suspendableListener);
}
canSuspend() {
return false;
}
};
/******************************************************************************/
/******************************************************************************/
// https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/contextMenus#Browser_compatibility
// Firefox for Android does no support browser.contextMenus.
vAPI.contextMenu = webext.menus && {
_callback: null,
_entries: [],
_createEntry: function(entry) {
webext.menus.create(JSON.parse(JSON.stringify(entry)));
},
onMustUpdate: function() {},
setEntries: function(entries, callback) {
entries = entries || [];
let n = Math.max(this._entries.length, entries.length);
for ( let i = 0; i < n; i++ ) {
const oldEntryId = this._entries[i];
const newEntry = entries[i];
if ( oldEntryId && newEntry ) {
if ( newEntry.id !== oldEntryId ) {
webext.menus.remove(oldEntryId);
this._createEntry(newEntry);
this._entries[i] = newEntry.id;
}
} else if ( oldEntryId && !newEntry ) {
webext.menus.remove(oldEntryId);
} else if ( !oldEntryId && newEntry ) {
this._createEntry(newEntry);
this._entries[i] = newEntry.id;
}
}
n = this._entries.length = entries.length;
callback = callback || null;
if ( callback === this._callback ) {
return;
}
if ( n !== 0 && callback !== null ) {
webext.menus.onClicked.addListener(callback);
this._callback = callback;
} else if ( n === 0 && this._callback !== null ) {
webext.menus.onClicked.removeListener(this._callback);
this._callback = null;
}
}
};
/******************************************************************************/
/******************************************************************************/
vAPI.commands = browser.commands;
/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/531
// Storage area dedicated to admin settings. Read-only.
// https://github.com/gorhill/uBlock/commit/43a5ed735b95a575a9339b6e71a1fcb27a99663b#commitcomment-13965030
// Not all Chromium-based browsers support managed storage. Merely testing or
// exception handling in this case does NOT work: I don't know why. The
// extension on Opera ends up in a non-sensical state, whereas vAPI become
// undefined out of nowhere. So only solution left is to test explicitly for
// Opera.
// https://github.com/gorhill/uBlock/issues/900
// Also, UC Browser: http://www.upsieutoc.com/image/WXuH
vAPI.adminStorage = (( ) => {
if ( webext.storage.managed instanceof Object === false ) {
return {
getItem: function() {
return Promise.resolve();
},
};
}
return {
getItem: async function(key) {
let bin;
try {
bin = await webext.storage.managed.get(key);
} catch(ex) {
}
if ( bin instanceof Object ) {
return bin[key];
}
}
};
})();
/******************************************************************************/
/******************************************************************************/
// https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage/sync
vAPI.cloud = (( ) => {
// Not all platforms support `webext.storage.sync`.
if ( webext.storage.sync instanceof Object === false ) { return; }
// Currently, only Chromium supports the following constants -- these
// values will be assumed for platforms which do not define them.
// https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/storage/sync
// > You can store up to 100KB of data using this API
const MAX_ITEMS =
webext.storage.sync.MAX_ITEMS || 512;
const QUOTA_BYTES =
webext.storage.sync.QUOTA_BYTES || 102400;
const QUOTA_BYTES_PER_ITEM =
webext.storage.sync.QUOTA_BYTES_PER_ITEM || 8192;
const chunkCountPerFetch = 16; // Must be a power of 2
const maxChunkCountPerItem = Math.floor(MAX_ITEMS * 0.75) & ~(chunkCountPerFetch - 1);
// https://github.com/gorhill/uBlock/issues/3006
// For Firefox, we will use a lower ratio to allow for more overhead for
// the infrastructure. Unfortunately this leads to less usable space for
// actual data, but all of this is provided for free by browser vendors,
// so we need to accept and deal with these limitations.
const evalMaxChunkSize = function() {
return Math.floor(
QUOTA_BYTES_PER_ITEM *
(vAPI.webextFlavor.soup.has('firefox') ? 0.6 : 0.75)
);
};
let maxChunkSize = evalMaxChunkSize();
// The real actual webextFlavor value may not be set in stone, so listen
// for possible future changes.
window.addEventListener('webextFlavor', function() {
maxChunkSize = evalMaxChunkSize();
}, { once: true });
const maxStorageSize = QUOTA_BYTES;
const options = {
defaultDeviceName: window.navigator.platform,
deviceName: vAPI.localStorage.getItem('deviceName') || ''
};
// This is used to find out a rough count of how many chunks exists:
// We "poll" at specific index in order to get a rough idea of how
// large is the stored string.
// This allows reading a single item with only 2 sync operations -- a
// good thing given chrome.storage.sync.MAX_WRITE_OPERATIONS_PER_MINUTE
// and chrome.storage.sync.MAX_WRITE_OPERATIONS_PER_HOUR.
const getCoarseChunkCount = async function(dataKey) {
const keys = {};
for ( let i = 0; i < maxChunkCountPerItem; i += 16 ) {
keys[dataKey + i.toString()] = '';
}
let bin;
try {
bin = await webext.storage.sync.get(keys);
} catch (reason) {
return reason;
}
let chunkCount = 0;
for ( let i = 0; i < maxChunkCountPerItem; i += 16 ) {
if ( bin[dataKey + i.toString()] === '' ) { break; }
chunkCount = i + 16;
}
return chunkCount;
};
const deleteChunks = function(dataKey, start) {
const keys = [];
// No point in deleting more than:
// - The max number of chunks per item
// - The max number of chunks per storage limit
const n = Math.min(
maxChunkCountPerItem,
Math.ceil(maxStorageSize / maxChunkSize)
);
for ( let i = start; i < n; i++ ) {
keys.push(dataKey + i.toString());
}
if ( keys.length !== 0 ) {
webext.storage.sync.remove(keys);
}
};
const push = async function(dataKey, data) {
let bin = {
'source': options.deviceName || options.defaultDeviceName,
'tstamp': Date.now(),
'data': data,
'size': 0
};
bin.size = JSON.stringify(bin).length;
const item = JSON.stringify(bin);
// Chunkify taking into account QUOTA_BYTES_PER_ITEM:
// https://developer.chrome.com/extensions/storage#property-sync
// "The maximum size (in bytes) of each individual item in sync
// "storage, as measured by the JSON stringification of its value
// "plus its key length."
bin = {};
let chunkCount = Math.ceil(item.length / maxChunkSize);
for ( let i = 0; i < chunkCount; i++ ) {
bin[dataKey + i.toString()] = item.substr(i * maxChunkSize, maxChunkSize);
}
bin[dataKey + chunkCount.toString()] = ''; // Sentinel
let result;
let errorStr;
try {
result = await webext.storage.sync.set(bin);
} catch (reason) {
errorStr = reason;
}
// https://github.com/gorhill/uBlock/issues/3006#issuecomment-332597677
// - Delete all that was pushed in case of failure.
// - It's unknown whether such issue applies only to Firefox:
// until such cases are reported for other browsers, we will
// reset the (now corrupted) content of the cloud storage
// only on Firefox.
if ( errorStr !== undefined && vAPI.webextFlavor.soup.has('firefox') ) {
chunkCount = 0;
}
// Remove potentially unused trailing chunks
deleteChunks(dataKey, chunkCount);
return errorStr;
};
const pull = async function(dataKey) {
const result = await getCoarseChunkCount(dataKey);
if ( typeof result !== 'number' ) {
return result;
}
const chunkKeys = {};
for ( let i = 0; i < result; i++ ) {
chunkKeys[dataKey + i.toString()] = '';
}
let bin;
try {
bin = await webext.storage.sync.get(chunkKeys);
} catch (reason) {
return reason;
}
// Assemble chunks into a single string.
// https://www.reddit.com/r/uMatrix/comments/8lc9ia/my_rules_tab_hangs_with_cloud_storage_support/
// Explicit sentinel is not necessarily present: this can
// happen when the number of chunks is a multiple of
// chunkCountPerFetch. Hence why we must also test against
// undefined.
let json = [], jsonSlice;
let i = 0;
for (;;) {
jsonSlice = bin[dataKey + i.toString()];
if ( jsonSlice === '' || jsonSlice === undefined ) { break; }
json.push(jsonSlice);
i += 1;
}
let entry = null;
try {
entry = JSON.parse(json.join(''));
} catch(ex) {
}
return entry;
};
const getOptions = function(callback) {
if ( typeof callback !== 'function' ) { return; }
callback(options);
};
const setOptions = function(details, callback) {
if ( typeof details !== 'object' || details === null ) { return; }
if ( typeof details.deviceName === 'string' ) {
vAPI.localStorage.setItem('deviceName', details.deviceName);
options.deviceName = details.deviceName;
}
getOptions(callback);
};
return { push, pull, getOptions, setOptions };
})();
/******************************************************************************/
/******************************************************************************/
// <<<<< end of local scope
}
/******************************************************************************/
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