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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 |
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343 var observer = new MutationObserver(function() | 343 var observer = new MutationObserver(function() |
344 { | 344 { |
345 if (style.parentNode != parentNode) | 345 if (style.parentNode != parentNode) |
346 parentNode.appendChild(style); | 346 parentNode.appendChild(style); |
347 }); | 347 }); |
348 | 348 |
349 observer.observe(parentNode, {childList: true}); | 349 observer.observe(parentNode, {childList: true}); |
350 return observer; | 350 return observer; |
351 } | 351 } |
352 | 352 |
353 function injectJS(f) | 353 function runInPage(fn, arg) |
354 { | 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"); | 355 var script = document.createElement("script"); |
356 script.type = "application/javascript"; | |
360 script.async = false; | 357 script.async = false; |
361 script.textContent = codeString; | 358 script.textContent = "(" + fn + ")(" + JSON.stringify(arg) + ");"; |
362 document.documentElement.appendChild(script); | 359 document.documentElement.appendChild(script); |
363 document.documentElement.removeChild(script); | 360 document.documentElement.removeChild(script); |
364 } | 361 } |
365 | 362 |
366 function protectStyleSheet(document, style) | 363 function protectStyleSheet(document, style) |
367 { | 364 { |
368 style.id = id; | 365 style.id = id; |
369 | 366 |
370 var protector = function(id) | 367 runInPage(function(id) |
371 { | 368 { |
372 var style = document.getElementById(id) || | 369 var style = document.getElementById(id) || |
373 document.documentElement.shadowRoot.getElementById(id); | 370 document.documentElement.shadowRoot.getElementById(id); |
374 style.removeAttribute("id"); | 371 style.removeAttribute("id"); |
375 | 372 |
376 var i; | |
377 var disableables = [style, style.sheet]; | 373 var disableables = [style, style.sheet]; |
378 for (i = 0; i < disableables.length; i += 1) | 374 for (var i = 0; i < disableables.length; i++) |
Sebastian Noack
2016/08/08 16:42:54
Nit: This is JS. How about i++?
kzar
2016/08/08 18:19:06
Done.
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379 Object.defineProperty(disableables[i], "disabled", | 375 Object.defineProperty(disableables[i], "disabled", |
380 {value: false, enumerable: true}); | 376 {value: false, enumerable: true}); |
381 | 377 |
382 var methods = ["deleteRule", "removeRule"]; | 378 ["deleteRule", "removeRule"].forEach(function(method) |
383 for (i = 0; i < methods.length; i += 1) | 379 { |
384 { | 380 var original = CSSStyleSheet.prototype[method]; |
385 if (methods[i] in CSSStyleSheet.prototype) | 381 CSSStyleSheet.prototype[method] = function(index) |
386 { | 382 { |
387 (function(method) | 383 if (this != style.sheet) |
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 { | 384 original.call(this, index); |
389 var original = CSSStyleSheet.prototype[method]; | 385 }; |
390 CSSStyleSheet.prototype[method] = function(index) | 386 }); |
391 { | 387 }, id); |
392 if (this != style.sheet) | |
393 original.call(this, index); | |
394 }; | |
395 }(methods[i])); | |
396 } | |
397 } | |
398 }; | |
399 | |
400 injectJS(protector, id); | |
401 } | 388 } |
402 | 389 |
403 // Neither Chrome[1] nor Safari allow us to intercept WebSockets, and therefore | 390 // 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 | 391 // 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 | 392 // us. As a workaround we wrap WebSocket, preventing blocked WebSocket |
406 // connections from being opened. | 393 // connections from being opened. |
407 // [1] - https://bugs.chromium.org/p/chromium/issues/detail?id=129353 | 394 // [1] - https://bugs.chromium.org/p/chromium/issues/detail?id=129353 |
408 function wrapWebSocket() | 395 function wrapWebSocket() |
409 { | 396 { |
410 if (typeof WebSocket == "undefined") | 397 if (typeof WebSocket == "undefined") |
411 return; | 398 return; |
412 | 399 |
413 var eventName = "abpws-" + id; | 400 var eventName = "abpws-" + id; |
414 | 401 |
415 document.addEventListener(eventName, function(event) | 402 document.addEventListener(eventName, function(event) |
416 { | 403 { |
417 ext.backgroundPage.sendMessage({ | 404 ext.backgroundPage.sendMessage({ |
418 type: "websocket-request", | 405 type: "websocket-request", |
419 url: event.detail.url | 406 url: event.detail.url |
420 }, function (block) | 407 }, function (block) |
421 { | 408 { |
422 document.dispatchEvent( | 409 document.dispatchEvent( |
423 new CustomEvent(eventName + "-" + event.detail.url, {detail: block}) | 410 new CustomEvent(eventName + "-" + event.detail.url, {detail: block}) |
424 ); | 411 ); |
425 }); | 412 }); |
426 }); | 413 }); |
427 | 414 |
428 function wrapper(eventName) | 415 runInPage(function(eventName) |
429 { | 416 { |
430 // As far as possible we must track everything we use that could be | 417 // As far as possible we must track everything we use that could be |
431 // sabotaged by the website later in order to circumvent us. | 418 // sabotaged by the website later in order to circumvent us. |
432 var RealWebSocket = WebSocket; | 419 var RealWebSocket = WebSocket; |
433 var closeWebSocket = RealWebSocket.prototype.close; | 420 var closeWebSocket = Function.prototype.call.bind(RealWebSocket.prototype.cl ose); |
434 var document = window.document; | 421 var addEventListener = document.addEventListener.bind(document); |
435 var addEventListener = document.addEventListener; | 422 var removeEventListener = document.removeEventListener.bind(document); |
436 var removeEventListener = document.removeEventListener; | 423 var dispatchEvent = document.dispatchEvent.bind(document); |
437 var dispatchEvent = document.dispatchEvent; | |
438 var CustomEvent = window.CustomEvent; | 424 var CustomEvent = window.CustomEvent; |
439 var boundCall = Function.prototype.call.bind(Function.prototype.call); | 425 |
440 // (These two functions are usually the same, but since Safari 9 considers | 426 function checkRequest(url, callback) |
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 { | 427 { |
447 var incomingEventName = eventName + "-" + url; | 428 var incomingEventName = eventName + "-" + url; |
448 function listener(event) | 429 function listener(event) |
449 { | 430 { |
450 callback(event.detail); | 431 callback(event.detail); |
451 boundCall(removeEventListener, document, incomingEventName, listener); | 432 removeEventListener(incomingEventName, listener); |
452 } | 433 } |
453 boundCall(addEventListener, document, incomingEventName, listener); | 434 addEventListener(incomingEventName, listener); |
454 | 435 |
455 boundCall(dispatchEvent, document, new CustomEvent(eventName, { | 436 dispatchEvent(new CustomEvent(eventName, { |
456 detail: {url: url, protocols: protocols} | 437 detail: {url: url} |
457 })); | 438 })); |
458 } | 439 } |
459 | 440 |
460 function wrappedToString() | 441 WebSocket = function WrappedWebSocket(url, protocols) |
461 { | 442 { |
462 if (this === WebSocket) | 443 // Throw correct exceptions if the constructor is used improperly. |
463 return boundCall(wsToString, RealWebSocket); | 444 if (!(this instanceof WrappedWebSocket)) return RealWebSocket(); |
464 if (this === wrappedToString) | 445 if (arguments.length < 1) return new RealWebSocket(); |
465 return boundCall(toString, toString); | 446 |
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); | 447 var websocket = new RealWebSocket(url, protocols); |
473 | 448 |
474 checkRequest(url, protocols, function(blocked) | 449 checkRequest(websocket.url, function(blocked) |
475 { | 450 { |
476 if (blocked) | 451 if (blocked) |
477 boundCall(closeWebSocket, websocket); | 452 closeWebSocket(websocket); |
478 }); | 453 }); |
479 | 454 |
480 return websocket; | 455 return websocket; |
481 }; | 456 }.bind(); |
457 | |
482 Object.defineProperties(WebSocket, { | 458 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}, | 459 CONNECTING: {value: RealWebSocket.CONNECTING, enumerable: true}, |
484 OPEN: {value: 1, enumerable: true}, | 460 OPEN: {value: RealWebSocket.OPEN, enumerable: true}, |
485 CLOSING: {value: 2, enumerable: true}, | 461 CLOSING: {value: RealWebSocket.CLOSING, enumerable: true}, |
486 CLOSED: {value: 3, enumerable: true} | 462 CLOSED: {value: RealWebSocket.CLOSED, enumerable: true}, |
463 prototype: {value: RealWebSocket.prototype} | |
487 }); | 464 }); |
488 WebSocket.prototype = RealWebSocket.prototype; | 465 |
489 RealWebSocket.prototype.constructor = WebSocket; | 466 RealWebSocket.prototype.constructor = WebSocket; |
490 } | 467 }, eventName); |
491 | |
492 injectJS(wrapper, eventName); | |
493 } | 468 } |
494 | 469 |
495 function init(document) | 470 function init(document) |
496 { | 471 { |
497 var shadow = null; | 472 var shadow = null; |
498 var style = null; | 473 var style = null; |
499 var observer = null; | 474 var observer = null; |
500 var tracer = null; | 475 var tracer = null; |
501 | 476 |
502 wrapWebSocket(); | 477 wrapWebSocket(); |
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664 }, true); | 639 }, true); |
665 | 640 |
666 return updateStylesheet; | 641 return updateStylesheet; |
667 } | 642 } |
668 | 643 |
669 if (document instanceof HTMLDocument) | 644 if (document instanceof HTMLDocument) |
670 { | 645 { |
671 checkSitekey(); | 646 checkSitekey(); |
672 window.updateStylesheet = init(document); | 647 window.updateStylesheet = init(document); |
673 } | 648 } |
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