mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-10 09:07:54 +01:00
346 lines
11 KiB
JavaScript
346 lines
11 KiB
JavaScript
/*******************************************************************************
|
|
|
|
uBlock Origin - a browser extension to block requests.
|
|
Copyright (C) 2014-2016 The uBlock Origin 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 HTMLDocument, XMLDocument */
|
|
|
|
// For non background pages
|
|
|
|
/******************************************************************************/
|
|
|
|
(function(self) {
|
|
|
|
'use strict';
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/464
|
|
if ( document instanceof HTMLDocument === false ) {
|
|
// https://github.com/chrisaljoudi/uBlock/issues/1528
|
|
// A XMLDocument can be a valid HTML document.
|
|
if (
|
|
document instanceof XMLDocument === false ||
|
|
document.createElement('div') instanceof HTMLDivElement === false
|
|
) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// https://github.com/gorhill/uBlock/issues/1124
|
|
// Looks like `contentType` is on track to be standardized:
|
|
// https://dom.spec.whatwg.org/#concept-document-content-type
|
|
if ( (document.contentType || '').lastIndexOf('image/', 0) === 0 ) {
|
|
return;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
var vAPI = self.vAPI = self.vAPI || {};
|
|
var chrome = self.chrome;
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/456
|
|
// Already injected?
|
|
if ( vAPI.sessionId ) {
|
|
return;
|
|
}
|
|
|
|
vAPI.sessionId = String.fromCharCode(Date.now() % 26 + 97) +
|
|
Math.random().toString(36).slice(2);
|
|
vAPI.chrome = true;
|
|
|
|
/******************************************************************************/
|
|
|
|
vAPI.setTimeout = vAPI.setTimeout || self.setTimeout.bind(self);
|
|
|
|
/******************************************************************************/
|
|
|
|
vAPI.shutdown = (function() {
|
|
var jobs = [];
|
|
|
|
var add = function(job) {
|
|
jobs.push(job);
|
|
};
|
|
|
|
var exec = function() {
|
|
var job;
|
|
while ( (job = jobs.pop()) ) {
|
|
job();
|
|
}
|
|
};
|
|
|
|
return {
|
|
add: add,
|
|
exec: exec
|
|
};
|
|
})();
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
vAPI.messaging = {
|
|
port: null,
|
|
portTimer: null,
|
|
portTimerDelay: 10000,
|
|
channels: Object.create(null),
|
|
channelCount: 0,
|
|
pending: Object.create(null),
|
|
pendingCount: 0,
|
|
auxProcessId: 1,
|
|
shuttingDown: false,
|
|
|
|
shutdown: function() {
|
|
this.shuttingDown = true;
|
|
this.destroyPort();
|
|
},
|
|
|
|
disconnectListener: function() {
|
|
this.port = null;
|
|
vAPI.shutdown.exec();
|
|
},
|
|
disconnectListenerCallback: null,
|
|
|
|
messageListener: function(details) {
|
|
if ( !details ) {
|
|
return;
|
|
}
|
|
|
|
// Sent to all channels
|
|
if ( details.broadcast === true && !details.channelName ) {
|
|
for ( var channelName in this.channels ) {
|
|
this.sendToChannelListeners(channelName, details.msg);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Response to specific message previously sent
|
|
if ( details.auxProcessId ) {
|
|
var listener = this.pending[details.auxProcessId];
|
|
delete this.pending[details.auxProcessId];
|
|
delete details.auxProcessId; // TODO: why?
|
|
if ( listener ) {
|
|
this.pendingCount -= 1;
|
|
listener(details.msg);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Sent to a specific channel
|
|
var response = this.sendToChannelListeners(details.channelName, details.msg);
|
|
|
|
// Respond back if required
|
|
if ( details.mainProcessId === undefined ) {
|
|
return;
|
|
}
|
|
var port = this.connect();
|
|
if ( port !== null ) {
|
|
port.postMessage({
|
|
mainProcessId: details.mainProcessId,
|
|
msg: response
|
|
});
|
|
}
|
|
},
|
|
messageListenerCallback: null,
|
|
|
|
portPoller: function() {
|
|
this.portTimer = null;
|
|
if ( this.port !== null ) {
|
|
if ( this.channelCount !== 0 || this.pendingCount !== 0 ) {
|
|
this.portTimer = vAPI.setTimeout(this.portPollerCallback, this.portTimerDelay);
|
|
this.portTimerDelay = Math.min(this.portTimerDelay * 2, 60 * 60 * 1000);
|
|
return;
|
|
}
|
|
}
|
|
this.destroyPort();
|
|
},
|
|
portPollerCallback: null,
|
|
|
|
destroyPort: function() {
|
|
if ( this.portTimer !== null ) {
|
|
clearTimeout(this.portTimer);
|
|
this.portTimer = null;
|
|
}
|
|
var port = this.port;
|
|
if ( port !== null ) {
|
|
port.disconnect();
|
|
port.onMessage.removeListener(this.messageListenerCallback);
|
|
port.onDisconnect.removeListener(this.disconnectListenerCallback);
|
|
this.port = null;
|
|
}
|
|
if ( this.channelCount !== 0 ) {
|
|
this.channels = Object.create(null);
|
|
this.channelCount = 0;
|
|
}
|
|
// service pending callbacks
|
|
if ( this.pendingCount !== 0 ) {
|
|
var pending = this.pending, callback;
|
|
this.pending = Object.create(null);
|
|
this.pendingCount = 0;
|
|
for ( var auxId in pending ) {
|
|
callback = pending[auxId];
|
|
if ( typeof callback === 'function' ) {
|
|
callback(null);
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
createPort: function() {
|
|
if ( this.shuttingDown ) {
|
|
return null;
|
|
}
|
|
if ( this.messageListenerCallback === null ) {
|
|
this.messageListenerCallback = this.messageListener.bind(this);
|
|
this.disconnectListenerCallback = this.disconnectListener.bind(this);
|
|
this.portPollerCallback = this.portPoller.bind(this);
|
|
}
|
|
try {
|
|
this.port = chrome.runtime.connect({name: vAPI.sessionId}) || null;
|
|
} catch (ex) {
|
|
this.port = null;
|
|
}
|
|
if ( this.port !== null ) {
|
|
this.port.onMessage.addListener(this.messageListenerCallback);
|
|
this.port.onDisconnect.addListener(this.disconnectListenerCallback);
|
|
}
|
|
this.portTimerDelay = 10000;
|
|
if ( this.portTimer === null ) {
|
|
this.portTimer = vAPI.setTimeout(this.portPollerCallback, this.portTimerDelay);
|
|
}
|
|
return this.port;
|
|
},
|
|
|
|
connect: function() {
|
|
return this.port !== null ? this.port : this.createPort();
|
|
},
|
|
|
|
send: function(channelName, message, callback) {
|
|
this.sendTo(channelName, message, undefined, undefined, callback);
|
|
},
|
|
|
|
sendTo: function(channelName, message, toTabId, toChannel, callback) {
|
|
// Too large a gap between the last request and the last response means
|
|
// the main process is no longer reachable: memory leaks and bad
|
|
// performance become a risk -- especially for long-lived, dynamic
|
|
// pages. Guard against this.
|
|
if ( this.pendingCount > 25 ) {
|
|
vAPI.shutdown.exec();
|
|
}
|
|
var port = this.connect();
|
|
if ( port === null ) {
|
|
if ( typeof callback === 'function' ) {
|
|
callback();
|
|
}
|
|
return;
|
|
}
|
|
var auxProcessId;
|
|
if ( callback ) {
|
|
auxProcessId = this.auxProcessId++;
|
|
this.pending[auxProcessId] = callback;
|
|
this.pendingCount += 1;
|
|
}
|
|
port.postMessage({
|
|
channelName: channelName,
|
|
auxProcessId: auxProcessId,
|
|
toTabId: toTabId,
|
|
toChannel: toChannel,
|
|
msg: message
|
|
});
|
|
},
|
|
|
|
addChannelListener: function(channelName, callback) {
|
|
if ( typeof callback !== 'function' ) {
|
|
return;
|
|
}
|
|
var listeners = this.channels[channelName];
|
|
if ( listeners !== undefined && listeners.indexOf(callback) !== -1 ) {
|
|
console.error('Duplicate listener on channel "%s"', channelName);
|
|
return;
|
|
}
|
|
if ( listeners === undefined ) {
|
|
this.channels[channelName] = [callback];
|
|
this.channelCount += 1;
|
|
} else {
|
|
listeners.push(callback);
|
|
}
|
|
this.connect();
|
|
},
|
|
|
|
removeChannelListener: function(channelName, callback) {
|
|
if ( typeof callback !== 'function' ) {
|
|
return;
|
|
}
|
|
var listeners = this.channels[channelName];
|
|
if ( listeners === undefined ) {
|
|
return;
|
|
}
|
|
var pos = this.listeners.indexOf(callback);
|
|
if ( pos === -1 ) {
|
|
console.error('Listener not found on channel "%s"', channelName);
|
|
return;
|
|
}
|
|
listeners.splice(pos, 1);
|
|
if ( listeners.length === 0 ) {
|
|
delete this.channels[channelName];
|
|
this.channelCount -= 1;
|
|
}
|
|
},
|
|
|
|
removeAllChannelListeners: function(channelName) {
|
|
var listeners = this.channels[channelName];
|
|
if ( listeners === undefined ) {
|
|
return;
|
|
}
|
|
delete this.channels[channelName];
|
|
this.channelCount -= 1;
|
|
},
|
|
|
|
sendToChannelListeners: function(channelName, msg) {
|
|
var listeners = this.channels[channelName];
|
|
if ( listeners === undefined ) {
|
|
return;
|
|
}
|
|
var response;
|
|
for ( var i = 0, n = listeners.length; i < n; i++ ) {
|
|
response = listeners[i](msg);
|
|
if ( response !== undefined ) {
|
|
break;
|
|
}
|
|
}
|
|
return response;
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
vAPI.shutdown.add(function() {
|
|
vAPI.messaging.shutdown();
|
|
delete window.vAPI;
|
|
});
|
|
|
|
// https://www.youtube.com/watch?v=rT5zCHn0tsg
|
|
// https://www.youtube.com/watch?v=E-jS4e3zacI
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
})(this);
|
|
|
|
/******************************************************************************/
|