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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 injectJS(f) | |
354 { | |
355 var args = JSON.stringify(Array.prototype.slice.call(arguments, 1)); | |
356 args = args.substring(1, args.length - 1); | |
357 var codeString = "(" + f.toString() + ")(" + args + ");"; | |
358 | |
359 var script = document.createElement("script"); | |
360 script.async = false; | |
361 script.textContent = codeString; | |
362 document.documentElement.appendChild(script); | |
363 document.documentElement.removeChild(script); | |
364 } | |
365 | |
352 function protectStyleSheet(document, style) | 366 function protectStyleSheet(document, style) |
353 { | 367 { |
354 var id = Math.random().toString(36).substr(2) | |
355 style.id = id; | 368 style.id = id; |
356 | 369 |
357 var code = [ | 370 var protector = function(id) |
358 "(function()", | 371 { |
359 "{", | 372 var style = document.getElementById(id) || |
360 ' var style = document.getElementById("' + id + '") ||', | 373 document.documentElement.shadowRoot.getElementById(id); |
361 ' document.documentElement.shadowRoot.getElementById("' + id + '");', | 374 style.removeAttribute("id"); |
362 ' style.removeAttribute("id");' | |
363 ]; | |
364 | 375 |
365 var disableables = ["style", "style.sheet"]; | 376 var i; |
366 for (var i = 0; i < disableables.length; i++) | 377 var disableables = [style, style.sheet]; |
378 for (i = 0; i < disableables.length; i += 1) | |
Sebastian Noack
2016/08/08 16:42:54
Nit: This is JS. How about i++?
kzar
2016/08/08 18:19:06
Done.
| |
379 Object.defineProperty(disableables[i], "disabled", | |
380 {value: false, enumerable: true}); | |
381 | |
382 var methods = ["deleteRule", "removeRule"]; | |
383 for (i = 0; i < methods.length; i += 1) | |
384 { | |
385 if (methods[i] in CSSStyleSheet.prototype) | |
386 { | |
387 (function(method) | |
Sebastian Noack
2016/08/08 16:42:54
Instead this wrapper function, why not simply usin
kzar
2016/08/08 18:19:06
Done.
| |
388 { | |
389 var original = CSSStyleSheet.prototype[method]; | |
390 CSSStyleSheet.prototype[method] = function(index) | |
391 { | |
392 if (this != style.sheet) | |
393 original.call(this, index); | |
394 }; | |
395 }(methods[i])); | |
396 } | |
397 } | |
398 }; | |
399 | |
400 injectJS(protector, id); | |
401 } | |
402 | |
403 // Neither Chrome[1] nor Safari allow us to intercept WebSockets, and therefore | |
404 // some ad networks are misusing them as a way to serve adverts and circumvent | |
405 // us. As a workaround we wrap WebSocket, preventing blocked WebSocket | |
406 // connections from being opened. | |
407 // [1] - https://bugs.chromium.org/p/chromium/issues/detail?id=129353 | |
408 function wrapWebSocket() | |
409 { | |
410 if (typeof WebSocket == "undefined") | |
411 return; | |
412 | |
413 var eventName = "abpws-" + id; | |
414 | |
415 document.addEventListener(eventName, function(event) | |
367 { | 416 { |
368 code.push(" Object.defineProperty(" + disableables[i] + ', "disabled", ' | 417 ext.backgroundPage.sendMessage({ |
369 + "{value: false, enumerable: true});") ; | 418 type: "websocket-request", |
419 url: event.detail.url | |
420 }, function (block) | |
421 { | |
422 document.dispatchEvent( | |
423 new CustomEvent(eventName + "-" + event.detail.url, {detail: block}) | |
424 ); | |
425 }); | |
426 }); | |
427 | |
428 function wrapper(eventName) | |
429 { | |
430 // As far as possible we must track everything we use that could be | |
431 // sabotaged by the website later in order to circumvent us. | |
432 var RealWebSocket = WebSocket; | |
433 var closeWebSocket = RealWebSocket.prototype.close; | |
434 var document = window.document; | |
435 var addEventListener = document.addEventListener; | |
436 var removeEventListener = document.removeEventListener; | |
437 var dispatchEvent = document.dispatchEvent; | |
438 var CustomEvent = window.CustomEvent; | |
439 var boundCall = Function.prototype.call.bind(Function.prototype.call); | |
440 // (These two functions are usually the same, but since Safari 9 considers | |
441 // WebSocket to be an object rather than a function we must track both.) | |
442 var toString = Function.prototype.toString; | |
443 var wsToString = RealWebSocket.toString; | |
444 | |
445 function checkRequest(url, protocols, callback) | |
446 { | |
447 var incomingEventName = eventName + "-" + url; | |
448 function listener(event) | |
449 { | |
450 callback(event.detail); | |
451 boundCall(removeEventListener, document, incomingEventName, listener); | |
452 } | |
453 boundCall(addEventListener, document, incomingEventName, listener); | |
454 | |
455 boundCall(dispatchEvent, document, new CustomEvent(eventName, { | |
456 detail: {url: url, protocols: protocols} | |
457 })); | |
458 } | |
459 | |
460 function wrappedToString() | |
461 { | |
462 if (this === WebSocket) | |
463 return boundCall(wsToString, RealWebSocket); | |
464 if (this === wrappedToString) | |
465 return boundCall(toString, toString); | |
466 return boundCall(toString, this); | |
467 }; | |
468 Function.prototype.toString = wrappedToString; | |
469 | |
470 WebSocket = function(url, protocols) | |
471 { | |
472 var websocket = new RealWebSocket(url, protocols); | |
473 | |
474 checkRequest(url, protocols, function(blocked) | |
475 { | |
476 if (blocked) | |
477 boundCall(closeWebSocket, websocket); | |
478 }); | |
479 | |
480 return websocket; | |
481 }; | |
482 Object.defineProperties(WebSocket, { | |
Sebastian Noack
2016/08/08 16:42:55
I wonder whether we should dynamically generate th
kzar
2016/08/08 18:19:06
Done.
| |
483 CONNECTING: {value: 0, enumerable: true}, | |
484 OPEN: {value: 1, enumerable: true}, | |
485 CLOSING: {value: 2, enumerable: true}, | |
486 CLOSED: {value: 3, enumerable: true} | |
487 }); | |
488 WebSocket.prototype = RealWebSocket.prototype; | |
489 RealWebSocket.prototype.constructor = WebSocket; | |
370 } | 490 } |
371 | 491 |
372 var methods = ["deleteRule", "removeRule"]; | 492 injectJS(wrapper, eventName); |
373 for (var j = 0; j < methods.length; j++) | |
374 { | |
375 var method = methods[j]; | |
376 if (method in CSSStyleSheet.prototype) | |
377 { | |
378 var origin = "CSSStyleSheet.prototype." + method; | |
379 code.push(" var " + method + " = " + origin + ";", | |
380 " " + origin + " = function(index)", | |
381 " {", | |
382 " if (this != style.sheet)", | |
383 " " + method + ".call(this, index);", | |
384 " }"); | |
385 } | |
386 } | |
387 | |
388 code.push("})();"); | |
389 | |
390 var script = document.createElement("script"); | |
391 script.async = false; | |
392 script.textContent = code.join("\n"); | |
393 document.documentElement.appendChild(script); | |
394 document.documentElement.removeChild(script); | |
395 } | 493 } |
396 | 494 |
397 function init(document) | 495 function init(document) |
398 { | 496 { |
399 var shadow = null; | 497 var shadow = null; |
400 var style = null; | 498 var style = null; |
401 var observer = null; | 499 var observer = null; |
402 var tracer = null; | 500 var tracer = null; |
403 | 501 |
502 wrapWebSocket(); | |
503 | |
404 function getPropertyFilters(callback) | 504 function getPropertyFilters(callback) |
405 { | 505 { |
406 ext.backgroundPage.sendMessage({ | 506 ext.backgroundPage.sendMessage({ |
407 type: "filters.get", | 507 type: "filters.get", |
408 what: "cssproperties" | 508 what: "cssproperties" |
409 }, callback); | 509 }, callback); |
410 } | 510 } |
411 var propertyFilters = new CSSPropertyFilters(window, getPropertyFilters, | 511 var propertyFilters = new CSSPropertyFilters(window, getPropertyFilters, |
412 addElemHideSelectors); | 512 addElemHideSelectors); |
413 | 513 |
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564 }, true); | 664 }, true); |
565 | 665 |
566 return updateStylesheet; | 666 return updateStylesheet; |
567 } | 667 } |
568 | 668 |
569 if (document instanceof HTMLDocument) | 669 if (document instanceof HTMLDocument) |
570 { | 670 { |
571 checkSitekey(); | 671 checkSitekey(); |
572 window.updateStylesheet = init(document); | 672 window.updateStylesheet = init(document); |
573 } | 673 } |
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