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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) |
| 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) |
| 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 bind = Function.prototype.bind; |
| 440 var call = Function.prototype.call; |
| 441 var toString = Function.prototype.toString; |
| 442 |
| 443 function checkRequest(url, protocols, callback) |
| 444 { |
| 445 var incomingEventName = eventName + "-" + url; |
| 446 function listener(event) |
| 447 { |
| 448 callback(event.detail); |
| 449 call.bind(removeEventListener)(document, incomingEventName, listener); |
| 450 } |
| 451 call.bind(addEventListener)(document, incomingEventName, listener); |
| 452 |
| 453 call.bind(dispatchEvent)(document, new CustomEvent(eventName, { |
| 454 detail: {url: url, protocols: protocols} |
| 455 })); |
| 456 } |
| 457 |
| 458 function wrappedToString() |
| 459 { |
| 460 if (this === WebSocket) |
| 461 return call.bind(toString)(RealWebSocket); |
| 462 if (this === wrappedToString) |
| 463 return call.bind(toString)(toString); |
| 464 return call.bind(toString)(this); |
| 465 }; |
| 466 Function.prototype.toString = wrappedToString; |
| 467 |
| 468 WebSocket = function(url, protocols) |
| 469 { |
| 470 var websocket = new RealWebSocket(url, protocols); |
| 471 |
| 472 checkRequest(url, protocols, function(blocked) |
| 473 { |
| 474 if (blocked) |
| 475 call.bind(closeWebSocket)(websocket); |
| 476 }); |
| 477 |
| 478 return websocket; |
| 479 }; |
| 480 Object.defineProperties(WebSocket, { |
| 481 CONNECTING: {value: 0, enumerable: true}, |
| 482 OPEN: {value: 1, enumerable: true}, |
| 483 CLOSING: {value: 2, enumerable: true}, |
| 484 CLOSED: {value: 3, enumerable: true} |
| 485 }); |
| 486 WebSocket.prototype = RealWebSocket.prototype; |
| 487 RealWebSocket.prototype.constructor = WebSocket; |
370 } | 488 } |
371 | 489 |
372 var methods = ["deleteRule", "removeRule"]; | 490 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 } | 491 } |
396 | 492 |
397 function init(document) | 493 function init(document) |
398 { | 494 { |
399 var shadow = null; | 495 var shadow = null; |
400 var style = null; | 496 var style = null; |
401 var observer = null; | 497 var observer = null; |
402 var tracer = null; | 498 var tracer = null; |
403 | 499 |
| 500 wrapWebSocket(); |
| 501 |
404 function getPropertyFilters(callback) | 502 function getPropertyFilters(callback) |
405 { | 503 { |
406 ext.backgroundPage.sendMessage({ | 504 ext.backgroundPage.sendMessage({ |
407 type: "filters.get", | 505 type: "filters.get", |
408 what: "cssproperties" | 506 what: "cssproperties" |
409 }, callback); | 507 }, callback); |
410 } | 508 } |
411 var propertyFilters = new CSSPropertyFilters(window, getPropertyFilters, | 509 var propertyFilters = new CSSPropertyFilters(window, getPropertyFilters, |
412 addElemHideSelectors); | 510 addElemHideSelectors); |
413 | 511 |
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564 }, true); | 662 }, true); |
565 | 663 |
566 return updateStylesheet; | 664 return updateStylesheet; |
567 } | 665 } |
568 | 666 |
569 if (document instanceof HTMLDocument) | 667 if (document instanceof HTMLDocument) |
570 { | 668 { |
571 checkSitekey(); | 669 checkSitekey(); |
572 window.updateStylesheet = init(document); | 670 window.updateStylesheet = init(document); |
573 } | 671 } |
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