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/*******************************************************************************
µBlock - a browser extension to block requests.
Copyright (C) 2014 The µBlock authors
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
*/
/* jshint esnext: true, bitwise: false */
/* global self, Components, punycode, µBlock */
// For background page
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
const {Services} = Cu.import('resource://gre/modules/Services.jsm', null);
/******************************************************************************/
var vAPI = self.vAPI = self.vAPI || {};
vAPI.firefox = true;
vAPI.fennec = Services.appinfo.ID === '{aa3c5121-dab2-40e2-81ca-7ea25febc110}';
/******************************************************************************/
vAPI.app = {
name: 'uBlock',
version: location.hash.slice(1)
};
/******************************************************************************/
vAPI.app.restart = function() {
// Listening in bootstrap.js
Cc['@mozilla.org/childprocessmessagemanager;1']
.getService(Ci.nsIMessageSender)
.sendAsyncMessage(location.host + '-restart');
};
/******************************************************************************/
// List of things that needs to be destroyed when disabling the extension
// Only functions should be added to it
var cleanupTasks = [];
// This must be updated manually, every time a new task is added/removed
var expectedNumberOfCleanups = 7;
window.addEventListener('unload', function() {
for ( var cleanup of cleanupTasks ) {
cleanup();
}
if ( cleanupTasks.length < expectedNumberOfCleanups ) {
console.error(
'uBlock> Cleanup tasks performed: %s (out of %s)',
cleanupTasks.length,
expectedNumberOfCleanups
);
}
// frameModule needs to be cleared too
var frameModule = {};
Cu.import(vAPI.getURL('frameModule.js'), frameModule);
frameModule.contentObserver.unregister();
Cu.unload(vAPI.getURL('frameModule.js'));
});
/******************************************************************************/
var SQLite = {
open: function() {
var path = Services.dirsvc.get('ProfD', Ci.nsIFile);
path.append('extension-data');
if ( !path.exists() ) {
path.create(Ci.nsIFile.DIRECTORY_TYPE, parseInt('0774', 8));
}
if ( !path.isDirectory() ) {
throw Error('Should be a directory...');
}
path.append(location.host + '.sqlite');
this.db = Services.storage.openDatabase(path);
this.db.executeSimpleSQL(
'CREATE TABLE IF NOT EXISTS settings' +
'(name TEXT PRIMARY KEY NOT NULL, value TEXT);'
);
cleanupTasks.push(function() {
// VACUUM somewhere else, instead on unload?
SQLite.run('VACUUM');
SQLite.db.asyncClose();
});
},
run: function(query, values, callback) {
if ( !this.db ) {
this.open();
}
var result = {};
query = this.db.createAsyncStatement(query);
if ( Array.isArray(values) && values.length ) {
var i = values.length;
while ( i-- ) {
query.bindByIndex(i, values[i]);
}
}
query.executeAsync({
handleResult: function(rows) {
if ( !rows || typeof callback !== 'function' ) {
return;
}
var row;
while ( row = rows.getNextRow() ) {
// we assume that there will be two columns, since we're
// using it only for preferences
result[row.getResultByIndex(0)] = row.getResultByIndex(1);
}
},
handleCompletion: function(reason) {
if ( typeof callback === 'function' && reason === 0 ) {
callback(result);
}
},
handleError: function(error) {
console.error('SQLite error ', error.result, error.message);
}
});
}
};
/******************************************************************************/
vAPI.storage = {
QUOTA_BYTES: 100 * 1024 * 1024,
sqlWhere: function(col, params) {
if ( params > 0 ) {
params = new Array(params + 1).join('?, ').slice(0, -2);
return ' WHERE ' + col + ' IN (' + params + ')';
}
return '';
},
get: function(details, callback) {
if ( typeof callback !== 'function' ) {
return;
}
var values = [], defaults = false;
if ( details !== null ) {
if ( Array.isArray(details) ) {
values = details;
} else if ( typeof details === 'object' ) {
defaults = true;
values = Object.keys(details);
} else {
values = [details.toString()];
}
}
SQLite.run(
'SELECT * FROM settings' + this.sqlWhere('name', values.length),
values,
function(result) {
var key;
for ( key in result ) {
result[key] = JSON.parse(result[key]);
}
if ( defaults ) {
for ( key in details ) {
if ( result[key] === undefined ) {
result[key] = details[key];
}
}
}
callback(result);
}
);
},
set: function(details, callback) {
var key, values = [], placeholders = [];
for ( key in details ) {
if ( !details.hasOwnProperty(key) ) {
continue;
}
values.push(key);
values.push(JSON.stringify(details[key]));
placeholders.push('?, ?');
}
if ( !values.length ) {
return;
}
SQLite.run(
'INSERT OR REPLACE INTO settings (name, value) SELECT ' +
placeholders.join(' UNION SELECT '),
values,
callback
);
},
remove: function(keys, callback) {
if ( typeof keys === 'string' ) {
keys = [keys];
}
SQLite.run(
'DELETE FROM settings' + this.sqlWhere('name', keys.length),
keys,
callback
);
},
clear: function(callback) {
SQLite.run('DELETE FROM settings');
SQLite.run('VACUUM', null, callback);
},
getBytesInUse: function(keys, callback) {
if ( typeof callback !== 'function' ) {
return;
}
SQLite.run(
'SELECT "size" AS size, SUM(LENGTH(value)) FROM settings' +
this.sqlWhere('name', Array.isArray(keys) ? keys.length : 0),
keys,
function(result) {
callback(result.size);
}
);
}
};
/******************************************************************************/
var windowWatcher = {
onReady: function(e) {
if ( e ) {
this.removeEventListener(e.type, windowWatcher.onReady);
}
var wintype = this.document.documentElement.getAttribute('windowtype');
if ( wintype !== 'navigator:browser' ) {
return;
}
var tabContainer;
var tabBrowser = getTabBrowser(this);
if ( !tabBrowser ) {
return;
}
if ( tabBrowser.deck ) {
// Fennec
tabContainer = tabBrowser.deck;
} else if ( tabBrowser.tabContainer ) {
// desktop Firefox
tabContainer = tabBrowser.tabContainer;
tabBrowser.addTabsProgressListener(tabWatcher);
vAPI.contextMenu.register(this.document);
} else {
return;
}
tabContainer.addEventListener('TabClose', tabWatcher.onTabClose);
tabContainer.addEventListener('TabSelect', tabWatcher.onTabSelect);
// when new window is opened TabSelect doesn't run on the selected tab?
},
observe: function(win, topic) {
if ( topic === 'domwindowopened' ) {
win.addEventListener('DOMContentLoaded', this.onReady);
}
}
};
/******************************************************************************/
var tabWatcher = {
SAME_DOCUMENT: Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT,
onTabClose: function({target}) {
// target is tab in Firefox, browser in Fennec
var tabId = vAPI.tabs.getTabId(target);
vAPI.tabs.onClosed(tabId);
delete vAPI.toolbarButton.tabs[tabId];
},
onTabSelect: function({target}) {
// target is tab in Firefox, browser in Fennec
var browser = (target.linkedBrowser || target);
var URI = browser.currentURI;
var aboutPath = URI.schemeIs('about') && URI.path;
var tabId = vAPI.tabs.getTabId(target);
if ( !aboutPath || (aboutPath !== 'blank' && aboutPath !== 'newtab') ) {
vAPI.setIcon(tabId, getOwnerWindow(target));
return;
}
if ( browser.webNavigation.busyFlags === 0 /*BUSY_FLAGS_NONE*/ ) {
vAPI.tabs.onNavigation({
frameId: 0,
tabId: tabId,
url: URI.asciiSpec
});
}
},
onLocationChange: function(browser, webProgress, request, location, flags) {
if ( !webProgress.isTopLevel ) {
return;
}
var tabId = vAPI.tabs.getTabId(browser);
// LOCATION_CHANGE_SAME_DOCUMENT = "did not load a new document"
if ( flags & this.SAME_DOCUMENT ) {
vAPI.tabs.onUpdated(tabId, {url: location.asciiSpec}, {
frameId: 0,
tabId: tabId,
url: browser.currentURI.asciiSpec
});
return;
}
// https://github.com/gorhill/uBlock/issues/105
// Allow any kind of pages
vAPI.tabs.onNavigation({
frameId: 0,
tabId: tabId,
url: location.asciiSpec
});
},
};
/******************************************************************************/
vAPI.isNoTabId = function(tabId) {
return tabId.toString() === '-1';
};
vAPI.noTabId = '-1';
/******************************************************************************/
var getTabBrowser = function(win) {
return vAPI.fennec && win.BrowserApp || win.gBrowser || null;
};
/******************************************************************************/
var getBrowserForTab = function(tab) {
if ( !tab ) {
return null;
}
return vAPI.fennec && tab.browser || tab.linkedBrowser || null;
};
/******************************************************************************/
var getOwnerWindow = function(target) {
if ( target.ownerDocument ) {
return target.ownerDocument.defaultView;
}
// Fennec
for ( var win of vAPI.tabs.getWindows() ) {
for ( var tab of win.BrowserApp.tabs) {
if ( tab === target || tab.window === target ) {
return win;
}
}
}
return null;
};
/******************************************************************************/
vAPI.tabs = {};
/******************************************************************************/
vAPI.tabs.registerListeners = function() {
// onNavigation and onUpdated handled with tabWatcher.onLocationChange
// onClosed - handled in tabWatcher.onTabClose
// onPopup - handled in httpObserver.handlePopup
for ( var win of this.getWindows() ) {
windowWatcher.onReady.call(win);
}
Services.ww.registerNotification(windowWatcher);
cleanupTasks.push(function() {
Services.ww.unregisterNotification(windowWatcher);
for ( var win of vAPI.tabs.getWindows() ) {
vAPI.contextMenu.unregister(win.document);
win.removeEventListener('DOMContentLoaded', windowWatcher.onReady);
var tabContainer;
var tabBrowser = getTabBrowser(win);
if ( !tabBrowser ) {
continue;
}
if ( tabBrowser.deck ) {
// Fennec
tabContainer = tabBrowser.deck;
} else if ( tabBrowser.tabContainer ) {
tabContainer = tabBrowser.tabContainer;
tabBrowser.removeTabsProgressListener(tabWatcher);
}
tabContainer.removeEventListener('TabClose', tabWatcher.onTabClose);
tabContainer.removeEventListener('TabSelect', tabWatcher.onTabSelect);
// Close extension tabs
for ( var tab of tabBrowser.tabs ) {
var browser = getBrowserForTab(tab);
if ( browser === null ) {
continue;
}
var URI = browser.currentURI;
if ( URI.schemeIs('chrome') && URI.host === location.host ) {
vAPI.tabs._remove(tab, getTabBrowser(win));
}
}
}
});
};
/******************************************************************************/
vAPI.tabs.stack = new WeakMap();
vAPI.tabs.stackId = 1;
/******************************************************************************/
vAPI.tabs.getTabId = function(target) {
if ( !target ) {
return vAPI.noTabId;
}
if ( vAPI.fennec ) {
if ( target.browser ) {
// target is a tab
target = target.browser;
}
} else if ( target.linkedPanel ) {
// target is a tab
target = target.linkedBrowser;
}
if ( target.localName !== 'browser' ) {
return vAPI.noTabId;
}
var tabId = this.stack.get(target);
if ( !tabId ) {
tabId = '' + this.stackId++;
this.stack.set(target, tabId);
}
return tabId;
};
/******************************************************************************/
// If tabIds is an array, then an array of tabs will be returned,
// otherwise a single tab
vAPI.tabs.getTabsForIds = function(tabIds) {
var tabs = [];
var singleTab = !Array.isArray(tabIds);
if ( singleTab ) {
tabIds = [tabIds];
}
for ( var tab of this.getAll() ) {
var tabId = this.stack.get(getBrowserForTab(tab));
if ( !tabId ) {
continue;
}
if ( tabIds.indexOf(tabId) !== -1 ) {
tabs.push(tab);
}
if ( tabs.length >= tabIds.length ) {
break;
}
}
return singleTab ? tabs[0] || null : tabs;
};
/******************************************************************************/
vAPI.tabs.get = function(tabId, callback) {
var tab, win;
if ( tabId === null ) {
win = Services.wm.getMostRecentWindow('navigator:browser');
tab = getTabBrowser(win).selectedTab;
tabId = this.getTabId(tab);
} else {
tab = this.getTabsForIds(tabId);
if ( tab ) {
win = getOwnerWindow(tab);
}
}
// For internal use
if ( typeof callback !== 'function' ) {
return tab;
}
if ( !tab ) {
callback();
return;
}
var windows = this.getWindows();
var browser = getBrowserForTab(tab);
var tabBrowser = getTabBrowser(win);
var tabIndex, tabTitle;
if ( vAPI.fennec ) {
tabIndex = tabBrowser.tabs.indexOf(tab);
tabTitle = browser.contentTitle;
} else {
tabIndex = tabBrowser.browsers.indexOf(browser);
tabTitle = tab.label;
}
callback({
id: tabId,
index: tabIndex,
windowId: windows.indexOf(win),
active: tab === tabBrowser.selectedTab,
url: browser.currentURI.asciiSpec,
title: tabTitle
});
};
/******************************************************************************/
vAPI.tabs.getAll = function(window) {
var win, tab;
var tabs = [];
for ( win of this.getWindows() ) {
if ( window && window !== win ) {
continue;
}
var tabBrowser = getTabBrowser(win);
if ( tabBrowser === null ) {
continue;
}
for ( tab of tabBrowser.tabs ) {
tabs.push(tab);
}
}
return tabs;
};
/******************************************************************************/
vAPI.tabs.getWindows = function() {
var winumerator = Services.wm.getEnumerator('navigator:browser');
var windows = [];
while ( winumerator.hasMoreElements() ) {
var win = winumerator.getNext();
if ( !win.closed ) {
windows.push(win);
}
}
return windows;
};
/******************************************************************************/
// 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
vAPI.tabs.open = function(details) {
if ( !details.url ) {
return null;
}
// extension pages
if ( /^[\w-]{2,}:/.test(details.url) === false ) {
details.url = vAPI.getURL(details.url);
}
var win, tab, tabBrowser;
if ( details.select ) {
var URI = Services.io.newURI(details.url, null, null);
for ( tab of this.getAll() ) {
var browser = getBrowserForTab(tab);
// Or simply .equals if we care about the fragment
if ( URI.equalsExceptRef(browser.currentURI) === false ) {
continue;
}
this.select(tab);
return;
}
}
if ( details.active === undefined ) {
details.active = true;
}
if ( details.tabId ) {
tab = this.getTabsForIds(details.tabId);
if ( tab ) {
getBrowserForTab(tab).loadURI(details.url);
return;
}
}
win = Services.wm.getMostRecentWindow('navigator:browser');
tabBrowser = getTabBrowser(win);
if ( vAPI.fennec ) {
tabBrowser.addTab(details.url, {selected: details.active !== false});
// Note that it's impossible to move tabs on Fennec, so don't bother
return;
}
if ( details.index === -1 ) {
details.index = tabBrowser.browsers.indexOf(tabBrowser.selectedBrowser) + 1;
}
tab = tabBrowser.loadOneTab(details.url, {inBackground: !details.active});
if ( details.index !== undefined ) {
tabBrowser.moveTabTo(tab, details.index);
}
};
/******************************************************************************/
// Replace the URL of a tab. Noop if the tab does not exist.
vAPI.tabs.replace = function(tabId, url) {
var targetURL = url;
// extension pages
if ( /^[\w-]{2,}:/.test(targetURL) !== true ) {
targetURL = vAPI.getURL(targetURL);
}
var tab = this.getTabsForIds(tabId);
if ( tab ) {
getBrowserForTab(tab).loadURI(targetURL);
}
};
/******************************************************************************/
vAPI.tabs._remove = function(tab, tabBrowser) {
if ( vAPI.fennec ) {
tabBrowser.closeTab(tab);
return;
}
tabBrowser.removeTab(tab);
};
/******************************************************************************/
vAPI.tabs.remove = function(tabIds) {
if ( !Array.isArray(tabIds) ) {
tabIds = [tabIds];
}
var tabs = this.getTabsForIds(tabIds);
if ( tabs.length === 0 ) {
return;
}
for ( var tab of tabs ) {
this._remove(tab, getTabBrowser(getOwnerWindow(tab)));
}
};
/******************************************************************************/
vAPI.tabs.reload = function(tabId) {
var tab = this.get(tabId);
if ( !tab ) {
return;
}
getBrowserForTab(tab).webNavigation.reload(
Ci.nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE
);
};
/******************************************************************************/
vAPI.tabs.select = function(tab) {
tab = typeof tab === 'object' ? tab : this.get(tab);
if ( !tab ) {
return;
}
var tabBrowser = getTabBrowser(getOwnerWindow(tab));
if ( vAPI.fennec ) {
tabBrowser.selectTab(tab);
} else {
tabBrowser.selectedTab = tab;
}
};
/******************************************************************************/
vAPI.tabs.injectScript = function(tabId, details, callback) {
var tab = this.get(tabId);
if ( !tab ) {
return;
}
if ( typeof details.file !== 'string' ) {
return;
}
details.file = vAPI.getURL(details.file);
getBrowserForTab(tab).messageManager.sendAsyncMessage(
location.host + ':broadcast',
JSON.stringify({
broadcast: true,
channelName: 'vAPI',
msg: {
cmd: 'injectScript',
details: details
}
})
);
if ( typeof callback === 'function' ) {
setTimeout(callback, 13);
}
};
/******************************************************************************/
vAPI.setIcon = function(tabId, iconStatus, badge) {
// If badge is undefined, then setIcon was called from the TabSelect event
var win = badge === undefined
? iconStatus
: Services.wm.getMostRecentWindow('navigator:browser');
var curTabId = vAPI.tabs.getTabId(getTabBrowser(win).selectedTab);
var tb = vAPI.toolbarButton;
// from 'TabSelect' event
if ( tabId === undefined ) {
tabId = curTabId;
} else if ( badge !== undefined ) {
tb.tabs[tabId] = { badge: badge, img: iconStatus === 'on' };
}
if ( tabId === curTabId ) {
tb.updateState(win, tabId);
}
};
/******************************************************************************/
vAPI.messaging = {
get globalMessageManager() {
return Cc['@mozilla.org/globalmessagemanager;1']
.getService(Ci.nsIMessageListenerManager);
},
frameScript: vAPI.getURL('frameScript.js'),
listeners: {},
defaultHandler: null,
NOOPFUNC: function(){},
UNHANDLED: 'vAPI.messaging.notHandled'
};
/******************************************************************************/
vAPI.messaging.listen = function(listenerName, callback) {
this.listeners[listenerName] = callback;
};
/******************************************************************************/
vAPI.messaging.onMessage = function({target, data}) {
var messageManager = target.messageManager;
if ( !messageManager ) {
// Message came from a popup, and its message manager is not usable.
// So instead we broadcast to the parent window.
messageManager = getOwnerWindow(
target.webNavigation.QueryInterface(Ci.nsIDocShell).chromeEventHandler
).messageManager;
}
var channelNameRaw = data.channelName;
var pos = channelNameRaw.indexOf('|');
var channelName = channelNameRaw.slice(pos + 1);
var callback = vAPI.messaging.NOOPFUNC;
if ( data.requestId !== undefined ) {
callback = CallbackWrapper.factory(
messageManager,
channelName,
channelNameRaw.slice(0, pos),
data.requestId
).callback;
}
var sender = {
tab: {
id: vAPI.tabs.getTabId(target)
}
};
// Specific handler
var r = vAPI.messaging.UNHANDLED;
var listener = vAPI.messaging.listeners[channelName];
if ( typeof listener === 'function' ) {
r = listener(data.msg, sender, callback);
}
if ( r !== vAPI.messaging.UNHANDLED ) {
return;
}
// Default handler
r = vAPI.messaging.defaultHandler(data.msg, sender, callback);
if ( r !== vAPI.messaging.UNHANDLED ) {
return;
}
console.error('uBlock> messaging > unknown request: %o', data);
// Unhandled:
// Need to callback anyways in case caller expected an answer, or
// else there is a memory leak on caller's side
callback();
};
/******************************************************************************/
vAPI.messaging.setup = function(defaultHandler) {
// Already setup?
if ( this.defaultHandler !== null ) {
return;
}
if ( typeof defaultHandler !== 'function' ) {
defaultHandler = function(){ return vAPI.messaging.UNHANDLED; };
}
this.defaultHandler = defaultHandler;
this.globalMessageManager.addMessageListener(
location.host + ':background',
this.onMessage
);
this.globalMessageManager.loadFrameScript(this.frameScript, true);
cleanupTasks.push(function() {
var gmm = vAPI.messaging.globalMessageManager;
gmm.removeDelayedFrameScript(vAPI.messaging.frameScript);
gmm.removeMessageListener(
location.host + ':background',
vAPI.messaging.onMessage
);
});
};
/******************************************************************************/
vAPI.messaging.broadcast = function(message) {
this.globalMessageManager.broadcastAsyncMessage(
location.host + ':broadcast',
JSON.stringify({broadcast: true, msg: message})
);
};
/******************************************************************************/
// This allows to avoid creating a closure for every single message which
// expects an answer. Having a closure created each time a message is processed
// has been always bothering me. Another benefit of the implementation here
// is to reuse the callback proxy object, so less memory churning.
//
// https://developers.google.com/speed/articles/optimizing-javascript
// "Creating a closure is significantly slower then creating an inner
// function without a closure, and much slower than reusing a static
// function"
//
// http://hacksoflife.blogspot.ca/2015/01/the-four-horsemen-of-performance.html
// "the dreaded 'uniformly slow code' case where every function takes 1%
// of CPU and you have to make one hundred separate performance optimizations
// to improve performance at all"
//
// http://jsperf.com/closure-no-closure/2
var CallbackWrapper = function(messageManager, channelName, listenerId, requestId) {
this.callback = this.proxy.bind(this); // bind once
this.init(messageManager, channelName, listenerId, requestId);
};
CallbackWrapper.junkyard = [];
CallbackWrapper.factory = function(messageManager, channelName, listenerId, requestId) {
var wrapper = CallbackWrapper.junkyard.pop();
if ( wrapper ) {
wrapper.init(messageManager, channelName, listenerId, requestId);
return wrapper;
}
return new CallbackWrapper(messageManager, channelName, listenerId, requestId);
};
CallbackWrapper.prototype.init = function(messageManager, channelName, listenerId, requestId) {
this.messageManager = messageManager;
this.channelName = channelName;
this.listenerId = listenerId;
this.requestId = requestId;
};
CallbackWrapper.prototype.proxy = function(response) {
var message = JSON.stringify({
requestId: this.requestId,
channelName: this.channelName,
msg: response !== undefined ? response : null
});
if ( this.messageManager.sendAsyncMessage ) {
this.messageManager.sendAsyncMessage(this.listenerId, message);
} else {
this.messageManager.broadcastAsyncMessage(this.listenerId, message);
}
// Mark for reuse
this.messageManager =
this.channelName =
this.requestId =
this.listenerId = null;
CallbackWrapper.junkyard.push(this);
};
/******************************************************************************/
var httpObserver = {
classDescription: 'net-channel-event-sinks for ' + location.host,
classID: Components.ID('{dc8d6319-5f6e-4438-999e-53722db99e84}'),
contractID: '@' + location.host + '/net-channel-event-sinks;1',
REQDATAKEY: location.host + 'reqdata',
ABORT: Components.results.NS_BINDING_ABORTED,
ACCEPT: Components.results.NS_SUCCEEDED,
// Request types: https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIContentPolicy#Constants
MAIN_FRAME: Ci.nsIContentPolicy.TYPE_DOCUMENT,
VALID_CSP_TARGETS: 1 << Ci.nsIContentPolicy.TYPE_DOCUMENT |
1 << Ci.nsIContentPolicy.TYPE_SUBDOCUMENT,
typeMap: {
1: 'other',
2: 'script',
3: 'image',
4: 'stylesheet',
5: 'object',
6: 'main_frame',
7: 'sub_frame',
11: 'xmlhttprequest',
12: 'object',
14: 'font',
21: 'image'
},
lastRequest: [{}, {}],
get componentRegistrar() {
return Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
},
get categoryManager() {
return Cc['@mozilla.org/categorymanager;1']
.getService(Ci.nsICategoryManager);
},
QueryInterface: (function() {
var {XPCOMUtils} = Cu.import('resource://gre/modules/XPCOMUtils.jsm', null);
return XPCOMUtils.generateQI([
Ci.nsIFactory,
Ci.nsIObserver,
Ci.nsIChannelEventSink,
Ci.nsISupportsWeakReference
]);
})(),
createInstance: function(outer, iid) {
if ( outer ) {
throw Components.results.NS_ERROR_NO_AGGREGATION;
}
return this.QueryInterface(iid);
},
register: function() {
Services.obs.addObserver(this, 'http-on-opening-request', true);
Services.obs.addObserver(this, 'http-on-examine-response', true);
// Guard against stale instances not having been unregistered
if ( this.componentRegistrar.isCIDRegistered(this.classID) ) {
try {
this.componentRegistrar.unregisterFactory(this.classID, Components.manager.getClassObject(this.classID, Ci.nsIFactory));
} catch (ex) {
console.error('uBlock> httpObserver > unable to unregister stale instance: ', ex);
}
}
this.componentRegistrar.registerFactory(
this.classID,
this.classDescription,
this.contractID,
this
);
this.categoryManager.addCategoryEntry(
'net-channel-event-sinks',
this.contractID,
this.contractID,
false,
true
);
},
unregister: function() {
Services.obs.removeObserver(this, 'http-on-opening-request');
Services.obs.removeObserver(this, 'http-on-examine-response');
this.componentRegistrar.unregisterFactory(this.classID, this);
this.categoryManager.deleteCategoryEntry(
'net-channel-event-sinks',
this.contractID,
false
);
},
handlePopup: function(URI, tabId, sourceTabId) {
if ( !sourceTabId ) {
return false;
}
if ( !URI.schemeIs('http') && !URI.schemeIs('https') ) {
return false;
}
var result = vAPI.tabs.onPopup({
targetTabId: tabId,
openerTabId: sourceTabId,
targetURL: URI.asciiSpec
});
return result === true;
},
handleRequest: function(channel, URI, details) {
var onBeforeRequest = vAPI.net.onBeforeRequest;
var type = this.typeMap[details.type] || 'other';
if ( onBeforeRequest.types.has(type) === false ) {
return false;
}
var result = onBeforeRequest.callback({
frameId: details.frameId,
hostname: URI.asciiHost,
parentFrameId: details.parentFrameId,
tabId: details.tabId,
type: type,
url: URI.asciiSpec
});
if ( !result || typeof result !== 'object' ) {
return false;
}
if ( result.cancel === true ) {
channel.cancel(this.ABORT);
return true;
}
/*if ( result.redirectUrl ) {
channel.redirectionLimit = 1;
channel.redirectTo(
Services.io.newURI(result.redirectUrl, null, null)
);
return true;
}*/
return false;
},
observe: function(channel, topic) {
if ( channel instanceof Ci.nsIHttpChannel === false ) {
return;
}
var URI = channel.URI;
var channelData, result;
if ( topic === 'http-on-examine-response' ) {
if ( !(channel instanceof Ci.nsIWritablePropertyBag) ) {
return;
}
try {
channelData = channel.getProperty(this.REQDATAKEY);
} catch (ex) {
return;
}
if ( !channelData ) {
return;
}
if ( (1 << channelData[4] & this.VALID_CSP_TARGETS) === 0 ) {
return;
}
topic = 'Content-Security-Policy';
try {
result = channel.getResponseHeader(topic);
} catch (ex) {
result = null;
}
result = vAPI.net.onHeadersReceived.callback({
hostname: URI.asciiHost,
parentFrameId: channelData[1],
responseHeaders: result ? [{name: topic, value: result}] : [],
tabId: channelData[3],
url: URI.asciiSpec
});
if ( result ) {
channel.setResponseHeader(
topic,
result.responseHeaders.pop().value,
true
);
}
return;
}
// http-on-opening-request
var lastRequest = this.lastRequest[0];
if ( lastRequest.url !== URI.spec ) {
if ( this.lastRequest[1].url === URI.spec ) {
lastRequest = this.lastRequest[1];
} else {
lastRequest.url = null;
}
}
if ( lastRequest.url === null ) {
lastRequest.type = channel.loadInfo && channel.loadInfo.contentPolicyType || 1;
result = this.handleRequest(channel, URI, {
tabId: vAPI.noTabId,
type: lastRequest.type
});
if ( result === true ) {
return;
}
if ( channel instanceof Ci.nsIWritablePropertyBag === false ) {
return;
}
// Carry data for behind-the-scene redirects
channel.setProperty(
this.REQDATAKEY,
[lastRequest.type, vAPI.noTabId, null, 0, -1]
);
return;
}
// Important! When loading file via XHR for mirroring,
// the URL will be the same, so it could fall into an infinite loop
lastRequest.url = null;
if ( this.handleRequest(channel, URI, lastRequest) ) {
return;
}
if ( vAPI.fennec && lastRequest.type === this.MAIN_FRAME ) {
vAPI.tabs.onNavigation({
frameId: 0,
tabId: lastRequest.tabId,
url: URI.asciiSpec
});
}
// If request is not handled we may use the data in on-modify-request
if ( channel instanceof Ci.nsIWritablePropertyBag ) {
channel.setProperty(this.REQDATAKEY, [
lastRequest.frameId,
lastRequest.parentFrameId,
lastRequest.sourceTabId,
lastRequest.tabId,
lastRequest.type
]);
}
},
// contentPolicy.shouldLoad doesn't detect redirects, this needs to be used
asyncOnChannelRedirect: function(oldChannel, newChannel, flags, callback) {
var result = this.ACCEPT;
// If error thrown, the redirect will fail
try {
var URI = newChannel.URI;
if ( !URI.schemeIs('http') && !URI.schemeIs('https') ) {
return;
}
if ( !(oldChannel instanceof Ci.nsIWritablePropertyBag) ) {
return;
}
var channelData = oldChannel.getProperty(this.REQDATAKEY);
if ( this.handlePopup(URI, channelData[3], channelData[2]) ) {
result = this.ABORT;
return;
}
var details = {
frameId: channelData[0],
parentFrameId: channelData[1],
tabId: channelData[3],
type: channelData[4]
};
if ( this.handleRequest(newChannel, URI, details) ) {
result = this.ABORT;
return;
}
// Carry the data on in case of multiple redirects
if ( newChannel instanceof Ci.nsIWritablePropertyBag ) {
newChannel.setProperty(this.REQDATAKEY, channelData);
}
} catch (ex) {
// console.error(ex);
} finally {
callback.onRedirectVerifyCallback(result);
}
}
};
/******************************************************************************/
vAPI.net = {};
/******************************************************************************/
vAPI.net.registerListeners = function() {
// Since it's not used
this.onBeforeSendHeaders = null;
this.onBeforeRequest.types = new Set(this.onBeforeRequest.types);
var shouldLoadListenerMessageName = location.host + ':shouldLoad';
var shouldLoadListener = function(e) {
var details = e.data;
var tabId = vAPI.tabs.getTabId(e.target);
var sourceTabId = null;
// Popup candidate
if ( details.openerURL ) {
for ( var tab of vAPI.tabs.getAll() ) {
var URI = getBrowserForTab(tab).currentURI;
// Probably isn't the best method to identify the source tab
if ( URI.spec !== details.openerURL ) {
continue;
}
sourceTabId = vAPI.tabs.getTabId(tab);
if ( sourceTabId === tabId ) {
sourceTabId = null;
continue;
}
URI = Services.io.newURI(details.url, null, null);
if ( httpObserver.handlePopup(URI, tabId, sourceTabId) ) {
return;
}
break;
}
}
var lastRequest = httpObserver.lastRequest;
lastRequest[1] = lastRequest[0];
lastRequest[0] = {
frameId: details.frameId,
parentFrameId: details.parentFrameId,
sourceTabId: sourceTabId,
tabId: tabId,
type: details.type,
url: details.url
};
if ( details.attrSrc !== undefined ) {
lastRequest[0].attrSrc = details.attrSrc;
}
};
vAPI.messaging.globalMessageManager.addMessageListener(
shouldLoadListenerMessageName,
shouldLoadListener
);
httpObserver.register();
cleanupTasks.push(function() {
vAPI.messaging.globalMessageManager.removeMessageListener(
shouldLoadListenerMessageName,
shouldLoadListener
);
httpObserver.unregister();
});
};
/******************************************************************************/
vAPI.toolbarButton = {
id: location.host + '-button',
type: 'view',
viewId: location.host + '-panel',
label: vAPI.app.name,
tooltiptext: vAPI.app.name,
tabs: {/*tabId: {badge: 0, img: boolean}*/}
};
/******************************************************************************/
// Toolbar button UI for desktop Firefox
vAPI.toolbarButton.init = function() {
if ( vAPI.fennec ) {
// Menu UI for Fennec
var tb = {
menuItemIds: new WeakMap(),
label: vAPI.app.name,
tabs: {}
};
vAPI.toolbarButton = tb;
tb.getMenuItemLabel = function(tabId) {
var label = this.label;
if ( tabId === undefined ) {
return label;
}
var tabDetails = this.tabs[tabId];
if ( !tabDetails ) {
return label;
}
if ( !tabDetails.img ) {
label += ' (' + vAPI.i18n('fennecMenuItemBlockingOff') + ')';
} else if ( tabDetails.badge ) {
label += ' (' + tabDetails.badge + ')';
}
return label;
};
tb.onClick = function() {
var win = Services.wm.getMostRecentWindow('navigator:browser');
var curTabId = vAPI.tabs.getTabId(getTabBrowser(win).selectedTab);
vAPI.tabs.open({
url: 'popup.html?tabId=' + curTabId,
index: -1,
select: true
});
};
tb.updateState = function(win, tabId) {
var id = this.menuItemIds.get(win);
if ( !id ) {
return;
}
win.NativeWindow.menu.update(id, {
name: this.getMenuItemLabel(tabId)
});
};
// Only actually expecting one window under Fennec (note, not tabs, windows)
for ( var win of vAPI.tabs.getWindows() ) {
var label = tb.getMenuItemLabel();
var id = win.NativeWindow.menu.add({
name: label,
callback: tb.onClick
});
tb.menuItemIds.set(win, id);
}
cleanupTasks.push(function() {
for ( var win of vAPI.tabs.getWindows() ) {
var id = tb.menuItemIds.get(win);
if ( id ) {
win.NativeWindow.menu.remove(id);
tb.menuItemIds.delete(win);
}
}
});
return;
}
var CustomizableUI;
try {
CustomizableUI = Cu.import('resource:///modules/CustomizableUI.jsm', null).CustomizableUI;
} catch (ex) {
return;
}
this.defaultArea = CustomizableUI.AREA_NAVBAR;
this.styleURI = [
'#' + this.id + ' {',
'list-style-image: url(',
vAPI.getURL('img/browsericons/icon16-off.svg'),
');',
'}',
'#' + this.viewId + ', #' + this.viewId + ' > iframe {',
'width: 160px;',
'height: 290px;',
'overflow: hidden !important;',
'}'
];
var platformVersion = Services.appinfo.platformVersion;
if ( Services.vc.compare(platformVersion, '36.0') < 0 ) {
this.styleURI.push(
'#' + this.id + '[badge]:not([badge=""])::after {',
'position: absolute;',
'margin-left: -16px;',
'margin-top: 3px;',
'padding: 1px 2px;',
'font-size: 9px;',
'font-weight: bold;',
'color: #fff;',
'background: #666;',
'content: attr(badge);',
'}'
);
} else {
this.CUIEvents = {};
var updateBadge = function() {
var wId = vAPI.toolbarButton.id;
var buttonInPanel = CustomizableUI.getWidget(wId).areaType === CustomizableUI.TYPE_MENU_PANEL;
for ( var win of vAPI.tabs.getWindows() ) {
var button = win.document.getElementById(wId);
if ( buttonInPanel ) {
button.classList.remove('badged-button');
continue;
}
if ( button === null ) {
continue;
}
button.classList.add('badged-button');
}
if ( buttonInPanel ) {
return;
}
// Anonymous elements need some time to be reachable
setTimeout(this.updateBadgeStyle, 250);
}.bind(this.CUIEvents);
this.CUIEvents.onCustomizeEnd = updateBadge;
this.CUIEvents.onWidgetUnderflow = updateBadge;
this.CUIEvents.updateBadgeStyle = function() {
var css = [
'background: #666',
'color: #fff'
].join(';');
for ( var win of vAPI.tabs.getWindows() ) {
var button = win.document.getElementById(vAPI.toolbarButton.id);
if ( button === null ) {
continue;
}
var badge = button.ownerDocument.getAnonymousElementByAttribute(
button,
'class',
'toolbarbutton-badge'
);
if ( !badge ) {
return;
}
badge.style.cssText = css;
}
};
this.onCreated = function(button) {
button.setAttribute('badge', '');
setTimeout(updateBadge, 250);
};
CustomizableUI.addListener(this.CUIEvents);
}
this.styleURI = Services.io.newURI(
'data:text/css,' + encodeURIComponent(this.styleURI.join('')),
null,
null
);
this.closePopup = function({target}) {
CustomizableUI.hidePanelForNode(
target.ownerDocument.getElementById(vAPI.toolbarButton.viewId)
);
};
CustomizableUI.createWidget(this);
vAPI.messaging.globalMessageManager.addMessageListener(
location.host + ':closePopup',
this.closePopup
);
cleanupTasks.push(function() {
if ( this.CUIEvents ) {
CustomizableUI.removeListener(this.CUIEvents);
}
CustomizableUI.destroyWidget(this.id);
vAPI.messaging.globalMessageManager.removeMessageListener(
location.host + ':closePopup',
this.closePopup
);
for ( var win of vAPI.tabs.getWindows() ) {
var panel = win.document.getElementById(this.viewId);
panel.parentNode.removeChild(panel);
win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.removeSheet(this.styleURI, 1);
}
}.bind(this));
this.init = null;
};
/******************************************************************************/
vAPI.toolbarButton.onBeforeCreated = function(doc) {
var panel = doc.createElement('panelview');
panel.setAttribute('id', this.viewId);
var iframe = doc.createElement('iframe');
iframe.setAttribute('type', 'content');
doc.getElementById('PanelUI-multiView')
.appendChild(panel)
.appendChild(iframe);
var updateTimer = null;
var delayedResize = function() {
if ( updateTimer ) {
return;
}
updateTimer = setTimeout(resizePopup, 10);
};
var resizePopup = function() {
updateTimer = null;
var body = iframe.contentDocument.body;
panel.parentNode.style.maxWidth = 'none';
// https://github.com/gorhill/uBlock/issues/730
// Voodoo programming: this recipe works
panel.style.height = iframe.style.height = body.clientHeight.toString() + 'px';
panel.style.width = iframe.style.width = body.clientWidth.toString() + 'px';
if ( iframe.clientHeight !== body.clientHeight || iframe.clientWidth !== body.clientWidth ) {
delayedResize();
}
};
var onPopupReady = function() {
var win = this.contentWindow;
if ( !win || win.location.host !== location.host ) {
return;
}
new win.MutationObserver(delayedResize).observe(win.document.body, {
attributes: true,
characterData: true,
subtree: true
});
delayedResize();
};
iframe.addEventListener('load', onPopupReady, true);
doc.defaultView.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.loadSheet(this.styleURI, 1);
};
/******************************************************************************/
vAPI.toolbarButton.onViewShowing = function({target}) {
target.firstChild.setAttribute('src', vAPI.getURL('popup.html'));
};
/******************************************************************************/
vAPI.toolbarButton.onViewHiding = function({target}) {
target.parentNode.style.maxWidth = '';
target.firstChild.setAttribute('src', 'about:blank');
};
/******************************************************************************/
vAPI.toolbarButton.updateState = function(win, tabId) {
var button = win.document.getElementById(this.id);
if ( !button ) {
return;
}
var icon = this.tabs[tabId];
button.setAttribute('badge', icon && icon.badge || '');
if ( !icon || !icon.img ) {
icon = '';
}
else {
icon = 'url(' + vAPI.getURL('img/browsericons/icon16.svg') + ')';
}
button.style.listStyleImage = icon;
};
/******************************************************************************/
vAPI.toolbarButton.init();
/******************************************************************************/
vAPI.contextMenu = {
contextMap: {
frame: 'inFrame',
link: 'onLink',
image: 'onImage',
audio: 'onAudio',
video: 'onVideo',
editable: 'onEditableArea'
}
};
/******************************************************************************/
vAPI.contextMenu.displayMenuItem = function({target}) {
var doc = target.ownerDocument;
var gContextMenu = doc.defaultView.gContextMenu;
if ( !gContextMenu.browser ) {
return;
}
var menuitem = doc.getElementById(vAPI.contextMenu.menuItemId);
var currentURI = gContextMenu.browser.currentURI;
// https://github.com/gorhill/uBlock/issues/105
// TODO: Should the element picker works on any kind of pages?
if ( !currentURI.schemeIs('http') && !currentURI.schemeIs('https') ) {
menuitem.hidden = true;
return;
}
var ctx = vAPI.contextMenu.contexts;
if ( !ctx ) {
menuitem.hidden = false;
return;
}
var ctxMap = vAPI.contextMenu.contextMap;
for ( var context of ctx ) {
if ( context === 'page' && !gContextMenu.onLink && !gContextMenu.onImage
&& !gContextMenu.onEditableArea && !gContextMenu.inFrame
&& !gContextMenu.onVideo && !gContextMenu.onAudio ) {
menuitem.hidden = false;
return;
}
if ( gContextMenu[ctxMap[context]] ) {
menuitem.hidden = false;
return;
}
}
menuitem.hidden = true;
};
/******************************************************************************/
vAPI.contextMenu.register = function(doc) {
if ( !this.menuItemId ) {
return;
}
if ( vAPI.fennec ) {
// TODO https://developer.mozilla.org/en-US/Add-ons/Firefox_for_Android/API/NativeWindow/contextmenus/add
/*var nativeWindow = doc.defaultView.NativeWindow;
contextId = nativeWindow.contextmenus.add(
this.menuLabel,
nativeWindow.contextmenus.linkOpenableContext,
this.onCommand
);*/
return;
}
var contextMenu = doc.getElementById('contentAreaContextMenu');
var menuitem = doc.createElement('menuitem');
menuitem.setAttribute('id', this.menuItemId);
menuitem.setAttribute('label', this.menuLabel);
menuitem.setAttribute('image', vAPI.getURL('img/browsericons/icon16.svg'));
menuitem.setAttribute('class', 'menuitem-iconic');
menuitem.addEventListener('command', this.onCommand);
contextMenu.addEventListener('popupshowing', this.displayMenuItem);
contextMenu.insertBefore(menuitem, doc.getElementById('inspect-separator'));
};
/******************************************************************************/
vAPI.contextMenu.unregister = function(doc) {
if ( !this.menuItemId ) {
return;
}
if ( vAPI.fennec ) {
// TODO
return;
}
var menuitem = doc.getElementById(this.menuItemId);
var contextMenu = menuitem.parentNode;
menuitem.removeEventListener('command', this.onCommand);
contextMenu.removeEventListener('popupshowing', this.displayMenuItem);
contextMenu.removeChild(menuitem);
};
/******************************************************************************/
vAPI.contextMenu.create = function(details, callback) {
this.menuItemId = details.id;
this.menuLabel = details.title;
this.contexts = details.contexts;
if ( Array.isArray(this.contexts) && this.contexts.length ) {
this.contexts = this.contexts.indexOf('all') === -1 ? this.contexts : null;
} else {
// default in Chrome
this.contexts = ['page'];
}
this.onCommand = function() {
var gContextMenu = getOwnerWindow(this).gContextMenu;
var details = {
menuItemId: this.id
};
if ( gContextMenu.inFrame ) {
details.tagName = 'iframe';
// Probably won't work with e10s
details.frameUrl = gContextMenu.focusedWindow.location.href;
} else if ( gContextMenu.onImage ) {
details.tagName = 'img';
details.srcUrl = gContextMenu.mediaURL;
} else if ( gContextMenu.onAudio ) {
details.tagName = 'audio';
details.srcUrl = gContextMenu.mediaURL;
} else if ( gContextMenu.onVideo ) {
details.tagName = 'video';
details.srcUrl = gContextMenu.mediaURL;
} else if ( gContextMenu.onLink ) {
details.tagName = 'a';
details.linkUrl = gContextMenu.linkURL;
}
callback(details, {
id: vAPI.tabs.getTabId(gContextMenu.browser),
url: gContextMenu.browser.currentURI.asciiSpec
});
};
for ( var win of vAPI.tabs.getWindows() ) {
this.register(win.document);
}
};
/******************************************************************************/
vAPI.contextMenu.remove = function() {
for ( var win of vAPI.tabs.getWindows() ) {
this.unregister(win.document);
}
this.menuItemId = null;
this.menuLabel = null;
this.contexts = null;
this.onCommand = null;
};
/******************************************************************************/
var optionsObserver = {
addonId: '{2b10c1c8-a11f-4bad-fe9c-1c11e82cac42}',
register: function() {
Services.obs.addObserver(this, 'addon-options-displayed', false);
cleanupTasks.push(this.unregister.bind(this));
var browser = getBrowserForTab(vAPI.tabs.get(null));
if ( browser && browser.currentURI && browser.currentURI.spec === 'about:addons' ) {
this.observe(browser.contentDocument, 'addon-enabled', this.addonId);
}
},
unregister: function() {
Services.obs.removeObserver(this, 'addon-options-displayed');
},
setupOptionsButton: function(doc, id, page) {
var button = doc.getElementById(id);
if ( button === null ) {
return;
}
button.addEventListener('command', function() {
vAPI.tabs.open({ url: page, index: -1 });
});
button.label = vAPI.i18n(id);
},
observe: function(doc, topic, addonId) {
if ( addonId !== this.addonId ) {
return;
}
this.setupOptionsButton(doc, 'showDashboardButton', 'dashboard.html');
this.setupOptionsButton(doc, 'showNetworkLogButton', 'devtools.html');
}
};
optionsObserver.register();
/******************************************************************************/
vAPI.lastError = function() {
return null;
};
/******************************************************************************/
// This is called only once, when everything has been loaded in memory after
// the extension was launched. It can be used to inject content scripts
// in already opened web pages, to remove whatever nuisance could make it to
// the web pages before uBlock was ready.
vAPI.onLoadAllCompleted = function() {
var µb = µBlock;
for ( var tab of this.tabs.getAll() ) {
// We're insterested in only the tabs that were already loaded
if ( !vAPI.fennec && tab.hasAttribute('pending') ) {
continue;
}
var tabId = this.tabs.getTabId(tab);
var browser = getBrowserForTab(tab);
µb.bindTabToPageStats(tabId, browser.currentURI.asciiSpec);
browser.messageManager.sendAsyncMessage(
location.host + '-load-completed'
);
}
};
/******************************************************************************/
// Likelihood is that we do not have to punycode: given punycode overhead,
// it's faster to check and skip than do it unconditionally all the time.
var punycodeHostname = punycode.toASCII;
var isNotASCII = /[^\x21-\x7F]/;
vAPI.punycodeHostname = function(hostname) {
return isNotASCII.test(hostname) ? punycodeHostname(hostname) : hostname;
};
vAPI.punycodeURL = function(url) {
if ( isNotASCII.test(url) ) {
return Services.io.newURI(url, null, null).asciiSpec;
}
return url;
};
/******************************************************************************/
})();
/******************************************************************************/