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uBlock/platform/chromium/vapi-background.js

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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
*/
/* global self, µBlock */
// For background page
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
var vAPI = self.vAPI = self.vAPI || {};
var chrome = self.chrome;
var manifest = chrome.runtime.getManifest();
vAPI.chrome = true;
var noopFunc = function(){};
/******************************************************************************/
vAPI.app = {
name: manifest.name,
version: manifest.version
};
/******************************************************************************/
vAPI.app.restart = function() {
chrome.runtime.reload();
};
/******************************************************************************/
/******************************************************************************/
// chrome.storage.local.get(null, function(bin){ console.debug('%o', bin); });
vAPI.storage = chrome.storage.local;
/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/uMatrix/issues/234
// https://developer.chrome.com/extensions/privacy#property-network
vAPI.browserSettings = {
set: function(details) {
for ( var setting in details ) {
if ( details.hasOwnProperty(setting) === false ) {
continue;
}
switch ( setting ) {
case 'prefetching':
chrome.privacy.network.networkPredictionEnabled.set({
value: !!details[setting],
scope: 'regular'
});
break;
case 'hyperlinkAuditing':
chrome.privacy.websites.hyperlinkAuditingEnabled.set({
value: !!details[setting],
scope: 'regular'
});
break;
case 'webrtcIPAddress':
if ( typeof chrome.privacy.network.webRTCMultipleRoutesEnabled === 'object' ) {
chrome.privacy.network.webRTCMultipleRoutesEnabled.set({
value: !!details[setting],
scope: 'regular'
});
}
break;
default:
break;
}
}
}
};
/******************************************************************************/
/******************************************************************************/
vAPI.tabs = {};
/******************************************************************************/
vAPI.isBehindTheSceneTabId = function(tabId) {
return tabId.toString() === '-1';
};
vAPI.noTabId = '-1';
/******************************************************************************/
var toChromiumTabId = function(tabId) {
if ( typeof tabId === 'string' ) {
tabId = parseInt(tabId, 10);
}
if ( typeof tabId !== 'number' || isNaN(tabId) || tabId === -1 ) {
return 0;
}
return tabId;
};
/******************************************************************************/
vAPI.tabs.registerListeners = function() {
var onNavigationClient = this.onNavigation || noopFunc;
var onPopupClient = this.onPopup || noopFunc;
var onUpdatedClient = this.onUpdated || noopFunc;
// https://developer.chrome.com/extensions/webNavigation
// [onCreatedNavigationTarget ->]
// onBeforeNavigate ->
// onCommitted ->
// onDOMContentLoaded ->
// onCompleted
var popupCandidates = Object.create(null);
var PopupCandidate = function(details) {
this.targetTabId = details.tabId.toString();
this.openerTabId = details.sourceTabId.toString();
this.targetURL = details.url;
this.selfDestructionTimer = null;
};
PopupCandidate.prototype.selfDestruct = function() {
if ( this.selfDestructionTimer !== null ) {
clearTimeout(this.selfDestructionTimer);
}
delete popupCandidates[this.targetTabId];
};
PopupCandidate.prototype.launchSelfDestruction = function() {
if ( this.selfDestructionTimer !== null ) {
clearTimeout(this.selfDestructionTimer);
}
this.selfDestructionTimer = setTimeout(this.selfDestruct.bind(this), 10000);
};
var popupCandidateCreate = function(details) {
var popup = popupCandidates[details.tabId];
// This really should not happen...
if ( popup !== undefined ) {
return;
}
return popupCandidates[details.tabId] = new PopupCandidate(details);
};
var popupCandidateTest = function(details) {
var popup = popupCandidates[details.tabId];
if ( popup === undefined ) {
return;
}
popup.targetURL = details.url;
if ( onPopupClient(popup) !== true ) {
return;
}
popup.selfDestruct();
return true;
};
var popupCandidateDestroy = function(details) {
var popup = popupCandidates[details.tabId];
if ( popup instanceof PopupCandidate ) {
popup.launchSelfDestruction();
}
};
// The chrome.webRequest.onBeforeRequest() won't be called for everything
// else than `http`/`https`. Thus, in such case, we will bind the tab as
// early as possible in order to increase the likelihood of a context
// properly setup if network requests are fired from within the tab.
// Example: Chromium + case #6 at
// http://raymondhill.net/ublock/popup.html
var reGoodForWebRequestAPI = /^https?:\/\//;
var onCreatedNavigationTarget = function(details) {
//console.debug('onCreatedNavigationTarget: popup candidate tab id %d = "%s"', details.tabId, details.url);
if ( reGoodForWebRequestAPI.test(details.url) === false ) {
details.frameId = 0;
onNavigationClient(details);
}
popupCandidateCreate(details);
popupCandidateTest(details);
};
var onBeforeNavigate = function(details) {
if ( details.frameId !== 0 ) {
return;
}
//console.debug('onBeforeNavigate: popup candidate tab id %d = "%s"', details.tabId, details.url);
popupCandidateTest(details);
};
var onUpdated = function(tabId, changeInfo, tab) {
if ( changeInfo.url && popupCandidateTest({ tabId: tabId, url: changeInfo.url }) ) {
return;
}
onUpdatedClient(tabId, changeInfo, tab);
};
var onCommitted = function(details) {
if ( details.frameId !== 0 ) {
return;
}
onNavigationClient(details);
//console.debug('onCommitted: popup candidate tab id %d = "%s"', details.tabId, details.url);
if ( popupCandidateTest(details) === true ) {
return;
}
popupCandidateDestroy(details);
};
chrome.webNavigation.onCreatedNavigationTarget.addListener(onCreatedNavigationTarget);
chrome.webNavigation.onBeforeNavigate.addListener(onBeforeNavigate);
chrome.webNavigation.onCommitted.addListener(onCommitted);
chrome.tabs.onUpdated.addListener(onUpdated);
if ( typeof this.onClosed === 'function' ) {
chrome.tabs.onRemoved.addListener(this.onClosed);
}
};
/******************************************************************************/
vAPI.tabs.get = function(tabId, callback) {
var onTabReady = function(tab) {
// https://code.google.com/p/chromium/issues/detail?id=410868#c8
if ( chrome.runtime.lastError ) {
/* noop */
}
// Caller must be prepared to deal with nil tab value
callback(tab);
};
if ( tabId !== null ) {
tabId = toChromiumTabId(tabId);
if ( tabId === 0 ) {
onTabReady(null);
} else {
chrome.tabs.get(tabId, onTabReady);
}
return;
}
var onTabReceived = function(tabs) {
// https://code.google.com/p/chromium/issues/detail?id=410868#c8
if ( chrome.runtime.lastError ) {
/* noop */
}
callback(tabs[0]);
};
chrome.tabs.query({ active: true, currentWindow: true }, onTabReceived);
};
/******************************************************************************/
// 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
vAPI.tabs.open = function(details) {
var targetURL = details.url;
if ( typeof targetURL !== 'string' || targetURL === '' ) {
return null;
}
// extension pages
if ( /^[\w-]{2,}:/.test(targetURL) !== true ) {
targetURL = vAPI.getURL(targetURL);
}
// dealing with Chrome's asynchronous API
var wrapper = function() {
if ( details.active === undefined ) {
details.active = true;
}
var subWrapper = function() {
var _details = {
url: targetURL,
active: !!details.active
};
// Opening a tab from incognito window won't focus the window
// in which the tab was opened
var focusWindow = function(tab) {
if ( tab.active ) {
chrome.windows.update(tab.windowId, { focused: true });
}
};
if ( !details.tabId ) {
if ( details.index !== undefined ) {
_details.index = details.index;
}
chrome.tabs.create(_details, focusWindow);
return;
}
// update doesn't accept index, must use move
chrome.tabs.update(toChromiumTabId(details.tabId), _details, function(tab) {
// if the tab doesn't exist
if ( vAPI.lastError() ) {
chrome.tabs.create(_details, focusWindow);
} else if ( details.index !== undefined ) {
chrome.tabs.move(tab.id, {index: details.index});
}
});
};
// Open in a standalone window
if ( details.popup === true ) {
chrome.windows.create({
url: details.url,
focused: details.active,
type: 'popup'
});
return;
}
if ( details.index !== -1 ) {
subWrapper();
return;
}
vAPI.tabs.get(null, function(tab) {
if ( tab ) {
details.index = tab.index + 1;
} else {
delete details.index;
}
subWrapper();
});
};
if ( !details.select ) {
wrapper();
return;
}
// https://developer.chrome.com/extensions/tabs#method-query
// "Note that fragment identifiers are not matched."
// It's a lie, fragment identifiers ARE matched. So we need to remove the
// fragment.
var pos = targetURL.indexOf('#');
var targetURLWithoutHash = pos === -1 ? targetURL : targetURL.slice(0, pos);
chrome.tabs.query({ url: targetURLWithoutHash }, function(tabs) {
var tab = tabs[0];
if ( !tab ) {
wrapper();
return;
}
var _details = {
active: true,
url: undefined
};
if ( targetURL !== tab.url ) {
_details.url = targetURL;
}
chrome.tabs.update(tab.id, _details, function(tab) {
chrome.windows.update(tab.windowId, { focused: true });
});
});
};
/******************************************************************************/
// Replace the URL of a tab. Noop if the tab does not exist.
vAPI.tabs.replace = function(tabId, url) {
tabId = toChromiumTabId(tabId);
if ( tabId === 0 ) {
return;
}
var targetURL = url;
// extension pages
if ( /^[\w-]{2,}:/.test(targetURL) !== true ) {
targetURL = vAPI.getURL(targetURL);
}
chrome.tabs.update(tabId, { url: targetURL }, function() {
// https://code.google.com/p/chromium/issues/detail?id=410868#c8
if ( chrome.runtime.lastError ) {
/* noop */
}
});
};
/******************************************************************************/
vAPI.tabs.remove = function(tabId) {
tabId = toChromiumTabId(tabId);
if ( tabId === 0 ) {
return;
}
var onTabRemoved = function() {
// https://code.google.com/p/chromium/issues/detail?id=410868#c8
if ( chrome.runtime.lastError ) {
/* noop */
}
};
chrome.tabs.remove(tabId, onTabRemoved);
};
/******************************************************************************/
vAPI.tabs.reload = function(tabId /*, flags*/) {
tabId = toChromiumTabId(tabId);
if ( tabId === 0 ) {
return;
}
var onReloaded = function() {
// https://code.google.com/p/chromium/issues/detail?id=410868#c8
if ( chrome.runtime.lastError ) {
/* noop */
}
};
chrome.tabs.reload(tabId, onReloaded);
};
/******************************************************************************/
// Select a specific tab.
vAPI.tabs.select = function(tabId) {
tabId = toChromiumTabId(tabId);
if ( tabId === 0 ) {
return;
}
chrome.tabs.update(tabId, { active: true }, function(tab) {
if ( chrome.runtime.lastError ) {
/* noop */
}
if ( !tab ) {
return;
}
chrome.windows.update(tab.windowId, { focused: true });
});
};
/******************************************************************************/
vAPI.tabs.injectScript = function(tabId, details, callback) {
var onScriptExecuted = function() {
// https://code.google.com/p/chromium/issues/detail?id=410868#c8
if ( chrome.runtime.lastError ) {
/* noop */
}
if ( typeof callback === 'function' ) {
callback();
}
};
if ( tabId ) {
chrome.tabs.executeScript(toChromiumTabId(tabId), details, onScriptExecuted);
} else {
chrome.tabs.executeScript(details, onScriptExecuted);
}
};
/******************************************************************************/
/******************************************************************************/
// 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.
vAPI.setIcon = function(tabId, iconStatus, badge) {
tabId = toChromiumTabId(tabId);
if ( tabId === 0 ) {
return;
}
var onIconReady = function() {
if ( vAPI.lastError() ) {
return;
}
chrome.browserAction.setBadgeText({ tabId: tabId, text: badge });
if ( badge !== '' ) {
chrome.browserAction.setBadgeBackgroundColor({
tabId: tabId,
color: '#666'
});
}
};
var iconPaths = iconStatus === 'on' ?
{ '19': 'img/browsericons/icon19.png', '38': 'img/browsericons/icon38.png' } :
{ '19': 'img/browsericons/icon19-off.png', '38': 'img/browsericons/icon38-off.png' };
chrome.browserAction.setIcon({ tabId: tabId, path: iconPaths }, onIconReady);
};
/******************************************************************************/
/******************************************************************************/
vAPI.messaging = {
ports: {},
listeners: {},
defaultHandler: null,
NOOPFUNC: noopFunc,
UNHANDLED: 'vAPI.messaging.notHandled'
};
/******************************************************************************/
vAPI.messaging.listen = function(listenerName, callback) {
this.listeners[listenerName] = callback;
};
/******************************************************************************/
vAPI.messaging.onPortMessage = (function() {
var messaging = vAPI.messaging;
var toAuxPending = {};
// Use a wrapper to avoid closure and to allow reuse.
var CallbackWrapper = function(port, request, timeout) {
this.callback = this.proxy.bind(this); // bind once
this.init(port, request, timeout);
};
CallbackWrapper.prototype.init = function(port, request, timeout) {
this.port = port;
this.request = request;
this.timerId = timeout !== undefined ?
vAPI.setTimeout(this.callback, timeout) :
null;
return this;
};
CallbackWrapper.prototype.proxy = function(response) {
if ( this.timerId !== null ) {
clearTimeout(this.timerId);
delete toAuxPending[this.timerId];
this.timerId = null;
}
// https://github.com/chrisaljoudi/uBlock/issues/383
if ( messaging.ports.hasOwnProperty(this.port.name) ) {
this.port.postMessage({
auxProcessId: this.request.auxProcessId,
channelName: this.request.channelName,
msg: response !== undefined ? response : null
});
}
// Mark for reuse
this.port = this.request = null;
callbackWrapperJunkyard.push(this);
};
var callbackWrapperJunkyard = [];
var callbackWrapperFactory = function(port, request, timeout) {
var wrapper = callbackWrapperJunkyard.pop();
if ( wrapper ) {
return wrapper.init(port, request, timeout);
}
return new CallbackWrapper(port, request, timeout);
};
var toAux = function(details, portFrom) {
var port, portTo;
var chromiumTabId = toChromiumTabId(details.toTabId);
// TODO: This could be an issue with a lot of tabs: easy to address
// with a port name to tab id map.
for ( var portName in messaging.ports ) {
if ( messaging.ports.hasOwnProperty(portName) === false ) {
continue;
}
// When sending to an auxiliary process, the target is always the
// port associated with the root frame.
port = messaging.ports[portName];
if ( port.sender.frameId === 0 && port.sender.tab.id === chromiumTabId ) {
portTo = port;
break;
}
}
var wrapper;
if ( details.auxProcessId !== undefined ) {
wrapper = callbackWrapperFactory(portFrom, details, 1023);
}
// Destination not found:
if ( portTo === undefined ) {
if ( wrapper !== undefined ) {
wrapper.callback();
}
return;
}
// As per HTML5, timer id is always an integer, thus suitable to be
// used as a key, and which value is safe to use across process
// boundaries.
if ( wrapper !== undefined ) {
toAuxPending[wrapper.timerId] = wrapper;
}
portTo.postMessage({
mainProcessId: wrapper && wrapper.timerId,
channelName: details.toChannel,
msg: details.msg
});
};
var toAuxResponse = function(details) {
var mainProcessId = details.mainProcessId;
if ( mainProcessId === undefined ) {
return;
}
if ( toAuxPending.hasOwnProperty(mainProcessId) === false ) {
return;
}
var wrapper = toAuxPending[mainProcessId];
delete toAuxPending[mainProcessId];
wrapper.callback(details.msg);
};
return function(request, port) {
// Auxiliary process to auxiliary process
if ( request.toTabId !== undefined ) {
toAux(request, port);
return;
}
// Auxiliary process to auxiliary process: response
if ( request.mainProcessId !== undefined ) {
toAuxResponse(request);
return;
}
// Auxiliary process to main process: prepare response
var callback = messaging.NOOPFUNC;
if ( request.auxProcessId !== undefined ) {
callback = callbackWrapperFactory(port, request).callback;
}
// Auxiliary process to main process: specific handler
var r = messaging.UNHANDLED;
var listener = messaging.listeners[request.channelName];
if ( typeof listener === 'function' ) {
r = listener(request.msg, port.sender, callback);
}
if ( r !== messaging.UNHANDLED ) {
return;
}
// Auxiliary process to main process: default handler
r = messaging.defaultHandler(request.msg, port.sender, callback);
if ( r !== messaging.UNHANDLED ) {
return;
}
// Auxiliary process to main process: no handler
console.error('uBlock> messaging > unknown request: %o', request);
// Need to callback anyways in case caller expected an answer, or
// else there is a memory leak on caller's side
callback();
};
})();
/******************************************************************************/
vAPI.messaging.onPortDisconnect = function(port) {
port.onDisconnect.removeListener(vAPI.messaging.onPortDisconnect);
port.onMessage.removeListener(vAPI.messaging.onPortMessage);
delete vAPI.messaging.ports[port.name];
};
/******************************************************************************/
vAPI.messaging.onPortConnect = function(port) {
port.onDisconnect.addListener(vAPI.messaging.onPortDisconnect);
port.onMessage.addListener(vAPI.messaging.onPortMessage);
vAPI.messaging.ports[port.name] = port;
};
/******************************************************************************/
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;
chrome.runtime.onConnect.addListener(this.onPortConnect);
};
/******************************************************************************/
vAPI.messaging.broadcast = function(message) {
var messageWrapper = {
broadcast: true,
msg: message
};
for ( var portName in this.ports ) {
if ( this.ports.hasOwnProperty(portName) === false ) {
continue;
}
this.ports[portName].postMessage(messageWrapper);
}
};
/******************************************************************************/
/******************************************************************************/
vAPI.net = {};
/******************************************************************************/
vAPI.net.registerListeners = function() {
var µb = µBlock;
var µburi = µb.URI;
var normalizeRequestDetails = function(details) {
µburi.set(details.url);
details.tabId = details.tabId.toString();
details.hostname = µburi.hostnameFromURI(details.url);
// The rest of the function code is to normalize type
if ( details.type !== 'other' ) {
return;
}
var tail = µburi.path.slice(-6);
var pos = tail.lastIndexOf('.');
// https://github.com/chrisaljoudi/uBlock/issues/862
// If no transposition possible, transpose to `object` as per
// Chromium bug 410382 (see below)
if ( pos === -1 ) {
details.type = 'object';
return;
}
var ext = tail.slice(pos) + '.';
if ( '.eot.ttf.otf.svg.woff.woff2.'.indexOf(ext) !== -1 ) {
details.type = 'font';
return;
}
// Still need this because often behind-the-scene requests are wrongly
// categorized as 'other'
if ( '.ico.png.gif.jpg.jpeg.webp.'.indexOf(ext) !== -1 ) {
details.type = 'image';
return;
}
// https://code.google.com/p/chromium/issues/detail?id=410382
details.type = 'object';
};
var headerValue = function(headers, name) {
var i = headers.length;
while ( i-- ) {
if ( headers[i].name.toLowerCase() === name ) {
return headers[i].value.trim();
}
}
return '';
};
var onBeforeRequestClient = this.onBeforeRequest.callback;
var onBeforeRequest = function(details) {
normalizeRequestDetails(details);
return onBeforeRequestClient(details);
};
chrome.webRequest.onBeforeRequest.addListener(
onBeforeRequest,
//function(details) {
// quickProfiler.start('onBeforeRequest');
// var r = onBeforeRequest(details);
// quickProfiler.stop();
// return r;
//},
{
'urls': this.onBeforeRequest.urls || ['<all_urls>'],
'types': this.onBeforeRequest.types || undefined
},
this.onBeforeRequest.extra
);
var onHeadersReceivedClient = this.onHeadersReceived.callback;
var onHeadersReceivedClientTypes = this.onHeadersReceived.types.slice(0);
var onHeadersReceivedTypes = onHeadersReceivedClientTypes.slice(0);
if (
onHeadersReceivedTypes.length !== 0 &&
onHeadersReceivedTypes.indexOf('other') === -1
) {
onHeadersReceivedTypes.push('other');
}
var onHeadersReceived = function(details) {
normalizeRequestDetails(details);
// Hack to work around Chromium API limitations, where requests of
// type `font` are returned as `other`. For example, our normalization
// fail at transposing `other` into `font` for URLs which are outside
// what is expected. At least when headers are received we can check
// for content type `font/*`. Blocking at onHeadersReceived time is
// less worse than not blocking at all. Also, due to Chromium bug,
// `other` always becomes `object` when it can't be normalized into
// something else. Test case for "unfriendly" font URLs:
// https://www.google.com/fonts
if ( details.type === 'object' ) {
if ( headerValue(details.responseHeaders, 'content-type').lastIndexOf('font/', 0) === 0 ) {
details.type = 'font';
var r = onBeforeRequestClient(details);
if ( typeof r === 'object' && r.cancel === true ) {
return { cancel: true };
}
}
if (
onHeadersReceivedClientTypes.length !== 0 &&
onHeadersReceivedClientTypes.indexOf(details.type) === -1
) {
return;
}
}
return onHeadersReceivedClient(details);
};
chrome.webRequest.onHeadersReceived.addListener(
onHeadersReceived,
{
'urls': this.onHeadersReceived.urls || ['<all_urls>'],
'types': onHeadersReceivedTypes
},
this.onHeadersReceived.extra
);
};
/******************************************************************************/
/******************************************************************************/
vAPI.contextMenu = {
create: function(details, callback) {
this.menuId = details.id;
this.callback = callback;
chrome.contextMenus.create(details);
chrome.contextMenus.onClicked.addListener(this.callback);
},
remove: function() {
chrome.contextMenus.onClicked.removeListener(this.callback);
chrome.contextMenus.remove(this.menuId);
}
};
/******************************************************************************/
/******************************************************************************/
vAPI.lastError = function() {
return chrome.runtime.lastError;
};
/******************************************************************************/
/******************************************************************************/
// 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() {
// http://code.google.com/p/chromium/issues/detail?id=410868#c11
// Need to be sure to access `vAPI.lastError()` to prevent
// spurious warnings in the console.
var scriptDone = function() {
vAPI.lastError();
};
var scriptEnd = function(tabId) {
if ( vAPI.lastError() ) {
return;
}
vAPI.tabs.injectScript(tabId, {
file: 'js/contentscript-end.js',
allFrames: true,
runAt: 'document_idle'
}, scriptDone);
};
var scriptStart = function(tabId) {
vAPI.tabs.injectScript(tabId, {
file: 'js/vapi-client.js',
allFrames: true,
runAt: 'document_idle'
}, function(){ });
vAPI.tabs.injectScript(tabId, {
file: 'js/contentscript-start.js',
allFrames: true,
runAt: 'document_idle'
}, function(){ scriptEnd(tabId); });
};
var bindToTabs = function(tabs) {
var µb = µBlock;
var i = tabs.length, tab;
while ( i-- ) {
tab = tabs[i];
µb.tabContextManager.commit(tab.id, tab.url);
µb.bindTabToPageStats(tab.id);
// https://github.com/chrisaljoudi/uBlock/issues/129
scriptStart(tab.id);
}
};
chrome.tabs.query({ url: '<all_urls>' }, bindToTabs);
};
/******************************************************************************/
/******************************************************************************/
vAPI.punycodeHostname = function(hostname) {
return hostname;
};
vAPI.punycodeURL = function(url) {
return url;
};
/******************************************************************************/
/******************************************************************************/
vAPI.cloud = (function() {
var chunkCountPerFetch = 16; // Must be a power of 2
// Mind chrome.storage.sync.MAX_ITEMS (512 at time of writing)
var maxChunkCountPerItem = Math.floor(512 * 0.75) & ~(chunkCountPerFetch - 1);
// Mind chrome.storage.sync.QUOTA_BYTES_PER_ITEM (8192 at time of writing)
var maxChunkSize = Math.floor(chrome.storage.sync.QUOTA_BYTES_PER_ITEM * 0.75);
// Mind chrome.storage.sync.QUOTA_BYTES_PER_ITEM (8192 at time of writing)
var maxStorageSize = chrome.storage.sync.QUOTA_BYTES;
var options = {
defaultDeviceName: window.navigator.platform,
deviceName: window.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.syncMAX_WRITE_OPERATIONS_PER_MINUTE
// and chrome.storage.syncMAX_WRITE_OPERATIONS_PER_HOUR.
var getCoarseChunkCount = function(dataKey, callback) {
var bin = {};
for ( var i = 0; i < maxChunkCountPerItem; i += 16 ) {
bin[dataKey + i.toString()] = '';
}
chrome.storage.sync.get(bin, function(bin) {
if ( chrome.runtime.lastError ) {
callback(0, chrome.runtime.lastError.message);
return;
}
var chunkCount = 0;
for ( var i = 0; i < maxChunkCountPerItem; i += 16 ) {
if ( bin[dataKey + i.toString()] === '' ) {
break;
}
chunkCount = i + 16;
}
callback(chunkCount);
});
};
var deleteChunks = function(dataKey, start) {
var keys = [];
// No point in deleting more than:
// - The max number of chunks per item
// - The max number of chunks per storage limit
var n = Math.min(
maxChunkCountPerItem,
Math.ceil(maxStorageSize / maxChunkSize)
);
for ( var i = start; i < n; i++ ) {
keys.push(dataKey + i.toString());
}
chrome.storage.sync.remove(keys);
};
var start = function(/* dataKeys */) {
};
var push = function(dataKey, data, callback) {
var item = JSON.stringify({
'source': options.deviceName || options.defaultDeviceName,
'tstamp': Date.now(),
'data': data
});
// 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."
var bin = {};
var chunkCount = Math.ceil(item.length / maxChunkSize);
for ( var i = 0; i < chunkCount; i++ ) {
bin[dataKey + i.toString()] = item.substr(i * maxChunkSize, maxChunkSize);
}
bin[dataKey + i.toString()] = ''; // Sentinel
chrome.storage.sync.set(bin, function() {
var errorStr;
if ( chrome.runtime.lastError ) {
errorStr = chrome.runtime.lastError.message;
}
callback(errorStr);
// Remove potentially unused trailing chunks
deleteChunks(dataKey, chunkCount);
});
};
var pull = function(dataKey, callback) {
var assembleChunks = function(bin) {
if ( chrome.runtime.lastError ) {
callback(null, chrome.runtime.lastError.message);
return;
}
// Assemble chunks into a single string.
var json = [], jsonSlice;
var i = 0;
for (;;) {
jsonSlice = bin[dataKey + i.toString()];
if ( jsonSlice === '' ) {
break;
}
json.push(jsonSlice);
i += 1;
}
var entry = null;
try {
entry = JSON.parse(json.join(''));
} catch(ex) {
}
callback(entry);
};
var fetchChunks = function(coarseCount, errorStr) {
if ( coarseCount === 0 || typeof errorStr === 'string' ) {
callback(null, errorStr);
return;
}
var bin = {};
for ( var i = 0; i < coarseCount; i++ ) {
bin[dataKey + i.toString()] = '';
}
chrome.storage.sync.get(bin, assembleChunks);
};
getCoarseChunkCount(dataKey, fetchChunks);
};
var getOptions = function(callback) {
if ( typeof callback !== 'function' ) {
return;
}
callback(options);
};
var setOptions = function(details, callback) {
if ( typeof details !== 'object' || details === null ) {
return;
}
if ( typeof details.deviceName === 'string' ) {
window.localStorage.setItem('deviceName', details.deviceName);
options.deviceName = details.deviceName;
}
getOptions(callback);
};
return {
start: start,
push: push,
pull: pull,
getOptions: getOptions,
setOptions: setOptions
};
})();
/******************************************************************************/
/******************************************************************************/
})();
/******************************************************************************/
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