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1 /* | 1 /* |
2 * This file is part of Adblock Plus <https://adblockplus.org/>, | 2 * This file is part of Adblock Plus <https://adblockplus.org/>, |
3 * Copyright (C) 2006-2016 Eyeo GmbH | 3 * Copyright (C) 2006-2016 Eyeo GmbH |
4 * | 4 * |
5 * Adblock Plus is free software: you can redistribute it and/or modify | 5 * Adblock Plus is free software: you can redistribute it and/or modify |
6 * it under the terms of the GNU General Public License version 3 as | 6 * it under the terms of the GNU General Public License version 3 as |
7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
8 * | 8 * |
9 * Adblock Plus is distributed in the hope that it will be useful, | 9 * Adblock Plus is distributed in the hope that it will be useful, |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 * GNU General Public License for more details. | 12 * GNU General Public License for more details. |
13 * | 13 * |
14 * You should have received a copy of the GNU General Public License | 14 * You should have received a copy of the GNU General Public License |
15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. | 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. |
16 */ | 16 */ |
17 | 17 |
18 var MutationObserver = window.MutationObserver || window.WebKitMutationObserver; | 18 var MutationObserver = window.MutationObserver || window.WebKitMutationObserver; |
19 var SELECTOR_GROUP_SIZE = 200; | 19 var SELECTOR_GROUP_SIZE = 200; |
20 var id = Math.random().toString(36).substr(2); | |
20 | 21 |
21 var typeMap = { | 22 var typeMap = { |
22 "img": "IMAGE", | 23 "img": "IMAGE", |
23 "input": "IMAGE", | 24 "input": "IMAGE", |
24 "picture": "IMAGE", | 25 "picture": "IMAGE", |
25 "audio": "MEDIA", | 26 "audio": "MEDIA", |
26 "video": "MEDIA", | 27 "video": "MEDIA", |
27 "frame": "SUBDOCUMENT", | 28 "frame": "SUBDOCUMENT", |
28 "iframe": "SUBDOCUMENT", | 29 "iframe": "SUBDOCUMENT", |
29 "object": "OBJECT", | 30 "object": "OBJECT", |
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342 var observer = new MutationObserver(function() | 343 var observer = new MutationObserver(function() |
343 { | 344 { |
344 if (style.parentNode != parentNode) | 345 if (style.parentNode != parentNode) |
345 parentNode.appendChild(style); | 346 parentNode.appendChild(style); |
346 }); | 347 }); |
347 | 348 |
348 observer.observe(parentNode, {childList: true}); | 349 observer.observe(parentNode, {childList: true}); |
349 return observer; | 350 return observer; |
350 } | 351 } |
351 | 352 |
353 function runInPage(fn, arg) | |
354 { | |
355 var script = document.createElement("script"); | |
356 script.type = "application/javascript"; | |
357 script.async = false; | |
358 script.textContent = "(" + fn + ")(" + JSON.stringify(arg) + ");"; | |
359 document.documentElement.appendChild(script); | |
360 document.documentElement.removeChild(script); | |
361 } | |
362 | |
352 function protectStyleSheet(document, style) | 363 function protectStyleSheet(document, style) |
353 { | 364 { |
354 var id = Math.random().toString(36).substr(2) | |
355 style.id = id; | 365 style.id = id; |
356 | 366 |
357 var code = [ | 367 runInPage(function(id) |
358 "(function()", | 368 { |
359 "{", | 369 var style = document.getElementById(id) || |
360 ' var style = document.getElementById("' + id + '") ||', | 370 document.documentElement.shadowRoot.getElementById(id); |
361 ' document.documentElement.shadowRoot.getElementById("' + id + '");', | 371 style.removeAttribute("id"); |
362 ' style.removeAttribute("id");' | |
363 ]; | |
364 | 372 |
365 var disableables = ["style", "style.sheet"]; | 373 var disableables = [style, style.sheet]; |
366 for (var i = 0; i < disableables.length; i++) | 374 for (var i = 0; i < disableables.length; i++) |
375 Object.defineProperty(disableables[i], "disabled", | |
376 {value: false, enumerable: true}); | |
377 | |
378 ["deleteRule", "removeRule"].forEach(function(method) | |
379 { | |
380 var original = CSSStyleSheet.prototype[method]; | |
381 CSSStyleSheet.prototype[method] = function(index) | |
382 { | |
383 if (this != style.sheet) | |
384 original.call(this, index); | |
385 }; | |
386 }); | |
387 }, id); | |
388 } | |
389 | |
390 // Neither Chrome[1] nor Safari allow us to intercept WebSockets, and therefore | |
391 // some ad networks are misusing them as a way to serve adverts and circumvent | |
392 // us. As a workaround we wrap WebSocket, preventing blocked WebSocket | |
393 // connections from being opened. | |
394 // [1] - https://bugs.chromium.org/p/chromium/issues/detail?id=129353 | |
395 function wrapWebSocket() | |
396 { | |
397 if (typeof WebSocket == "undefined") | |
398 return; | |
399 | |
400 var eventName = "abpws-" + id; | |
401 | |
402 document.addEventListener(eventName, function(event) | |
367 { | 403 { |
368 code.push(" Object.defineProperty(" + disableables[i] + ', "disabled", ' | 404 ext.backgroundPage.sendMessage({ |
369 + "{value: false, enumerable: true});") ; | 405 type: "websocket-request", |
370 } | 406 url: event.detail.url |
407 }, function (block) | |
408 { | |
409 document.dispatchEvent( | |
410 new CustomEvent(eventName + "-" + event.detail.url, {detail: block}) | |
411 ); | |
412 }); | |
413 }); | |
371 | 414 |
372 var methods = ["deleteRule", "removeRule"]; | 415 runInPage(function(eventName) |
373 for (var j = 0; j < methods.length; j++) | |
374 { | 416 { |
375 var method = methods[j]; | 417 // As far as possible we must track everything we use that could be |
376 if (method in CSSStyleSheet.prototype) | 418 // sabotaged by the website later in order to circumvent us. |
419 var RealWebSocket = WebSocket; | |
420 var closeWebSocket = Function.prototype.call.bind(RealWebSocket.prototype.cl ose); | |
421 var addEventListener = document.addEventListener.bind(document); | |
422 var removeEventListener = document.removeEventListener.bind(document); | |
423 var dispatchEvent = document.dispatchEvent.bind(document); | |
424 var CustomEvent = window.CustomEvent; | |
425 | |
426 function checkRequest(url, callback) | |
377 { | 427 { |
378 var origin = "CSSStyleSheet.prototype." + method; | 428 var incomingEventName = eventName + "-" + url; |
379 code.push(" var " + method + " = " + origin + ";", | 429 function listener(event) |
380 " " + origin + " = function(index)", | 430 { |
381 " {", | 431 callback(event.detail); |
382 " if (this != style.sheet)", | 432 removeEventListener(incomingEventName, listener); |
383 " " + method + ".call(this, index);", | 433 } |
384 " }"); | 434 addEventListener(incomingEventName, listener); |
435 | |
436 dispatchEvent(new CustomEvent(eventName, { | |
437 detail: {url: url} | |
438 })); | |
385 } | 439 } |
386 } | |
387 | 440 |
388 code.push("})();"); | 441 WebSocket = function WrappedWebSocket(url, protocols) |
442 { | |
443 // Throw correct exceptions if the constructor is used improperly. | |
444 if (!(this instanceof WrappedWebSocket)) return RealWebSocket(); | |
445 if (arguments.length < 1) return new RealWebSocket(); | |
389 | 446 |
390 var script = document.createElement("script"); | 447 var websocket = new RealWebSocket(url, protocols); |
391 script.async = false; | 448 |
392 script.textContent = code.join("\n"); | 449 checkRequest(websocket.url, function(blocked) |
393 document.documentElement.appendChild(script); | 450 { |
394 document.documentElement.removeChild(script); | 451 if (blocked) |
452 closeWebSocket(websocket); | |
453 }); | |
454 | |
455 return websocket; | |
456 }.bind(); | |
457 Object.defineProperties(WebSocket, { | |
458 CONNECTING: {value: 0, enumerable: true}, | |
Sebastian Noack
2016/08/10 16:15:39
Still not a reason to hard-code the values:
Obj
kzar
2016/08/10 16:20:07
Added the blank lines back, sorry didn't mean to r
| |
459 OPEN: {value: 1, enumerable: true}, | |
460 CLOSING: {value: 2, enumerable: true}, | |
461 CLOSED: {value: 3, enumerable: true}, | |
462 prototype: {value: RealWebSocket.prototype} | |
463 }); | |
464 RealWebSocket.prototype.constructor = WebSocket; | |
465 }, eventName); | |
395 } | 466 } |
396 | 467 |
397 function init(document) | 468 function init(document) |
398 { | 469 { |
399 var shadow = null; | 470 var shadow = null; |
400 var style = null; | 471 var style = null; |
401 var observer = null; | 472 var observer = null; |
402 var tracer = null; | 473 var tracer = null; |
403 | 474 |
475 wrapWebSocket(); | |
476 | |
404 function getPropertyFilters(callback) | 477 function getPropertyFilters(callback) |
405 { | 478 { |
406 ext.backgroundPage.sendMessage({ | 479 ext.backgroundPage.sendMessage({ |
407 type: "filters.get", | 480 type: "filters.get", |
408 what: "cssproperties" | 481 what: "cssproperties" |
409 }, callback); | 482 }, callback); |
410 } | 483 } |
411 var propertyFilters = new CSSPropertyFilters(window, getPropertyFilters, | 484 var propertyFilters = new CSSPropertyFilters(window, getPropertyFilters, |
412 addElemHideSelectors); | 485 addElemHideSelectors); |
413 | 486 |
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564 }, true); | 637 }, true); |
565 | 638 |
566 return updateStylesheet; | 639 return updateStylesheet; |
567 } | 640 } |
568 | 641 |
569 if (document instanceof HTMLDocument) | 642 if (document instanceof HTMLDocument) |
570 { | 643 { |
571 checkSitekey(); | 644 checkSitekey(); |
572 window.updateStylesheet = init(document); | 645 window.updateStylesheet = init(document); |
573 } | 646 } |
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