mirror of
https://github.com/kkapsner/CanvasBlocker
synced 2025-07-04 04:26:35 +02:00
Big linting
This commit is contained in:
kkapsner
parent
b5e6d049ce
commit
aef6bd3d59
58 changed files with 2074 additions and 1856 deletions
680
lib/intercept.js
680
lib/intercept.js
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@ -41,380 +41,394 @@
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setRandomSupplyByType(settings.rng);
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});
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function getURL(window){
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function getURL(windowToProcess){
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let href;
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try {
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href = window.location.href;
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href = windowToProcess.location.href;
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}
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catch (e){
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catch (error){
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// unable to read location due to SOP
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// since we are not able to do anything in that case we can allow everything
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return "about:SOP";
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}
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if (!href || href === "about:blank"){
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if (window !== window.parent){
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return getURL(window.parent);
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if (windowToProcess !== windowToProcess.parent){
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return getURL(windowToProcess.parent);
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}
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else if (window.opener){
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return getURL(window.opener);
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else if (windowToProcess.opener){
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return getURL(windowToProcess.opener);
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}
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}
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return href;
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}
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const getAllFunctionObjects = function(windowToProcess, changedFunction){
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return (
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Array.isArray(changedFunction.object)?
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changedFunction.object:
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[changedFunction.object]
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).map(function(name){
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if (name){
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const constructor = getWrapped(windowToProcess)[name];
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if (constructor){
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return constructor.prototype;
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}
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}
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return false;
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}).concat(
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changedFunction.objectGetters?
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changedFunction.objectGetters.map(function(objectGetter){
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return objectGetter(getWrapped(windowToProcess));
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}):
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[]
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);
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};
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const forEachFunction = function(windowToProcess, callback){
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apiNames.forEach(function(name){
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const changedFunction = changedFunctions[name];
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getAllFunctionObjects(windowToProcess, changedFunction).forEach(function(object){
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if (object){
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callback({name, object: object, changedFunction});
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}
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});
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});
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};
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const forEachGetter = function(windowToProcess, callback){
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changedGetters.forEach(function(changedGetter){
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const name = changedGetter.name;
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changedGetter.objectGetters.forEach(function(changedGetter){
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const object = changedGetter(getWrapped(windowToProcess));
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if (object){
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callback({name, object, objectGetter: changedGetter});
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}
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});
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});
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};
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scope.preIntercept = function preIntercept({subject: window}, apis){
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if (!settings.isStillDefault){
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logging.message("settings already loaded -> no need to pre intercept");
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scope.intercept({subject: window}, apis);
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const forEach = function(windowToProcess, callback){
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forEachFunction(windowToProcess, callback);
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forEachGetter(windowToProcess, callback);
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};
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const doRealIntercept = function(windowToProcess, apis, state){
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if (!state.intercepted){
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scope.intercept({subject: windowToProcess}, apis);
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state.intercepted = true;
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}
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else {
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logging.message("settings not loaded -> need to pre intercept");
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let forceLoad = true;
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let preIntercepted = false;
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let intercepted = false;
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const forEachFunction = function(callback){
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apiNames.forEach(function(name){
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const changedFunction = changedFunctions[name];
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(
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Array.isArray(changedFunction.object)?
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changedFunction.object:
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[changedFunction.object]
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).map(function(name){
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if (name){
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const constructor = getWrapped(window)[name];
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if (constructor){
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return constructor.prototype;
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}
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}
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return false;
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}).concat(
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changedFunction.objectGetters?
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changedFunction.objectGetters.map(function(objectGetter){
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return objectGetter(getWrapped(window));
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}):
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[]
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).forEach(function(object){
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if (object){
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callback({name, object: object});
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}
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});
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});
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changedGetters.forEach(function(changedGetter){
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const name = changedGetter.name;
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changedGetter.objectGetters.forEach(function(objectGetter){
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const object = objectGetter(getWrapped(window));
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if (object){
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callback({name, object});
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}
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});
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});
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};
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let originalPropertyDescriptors = {};
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const doPreIntercept = function(){
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if (!preIntercepted){
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forEachFunction(function({name, object}){
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const map = originalPropertyDescriptors[name] || new WeakMap();
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originalPropertyDescriptors[name] = map;
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const originalPropertyDescriptor = Object.getOwnPropertyDescriptor(object, name);
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if (!originalPropertyDescriptor){
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return;
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}
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map.set(object, originalPropertyDescriptor);
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};
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const doPreIntercept = function(windowToProcess, apis, state){
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const forceLoad = true;
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const originalPropertyDescriptors = {};
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const undoPreIntercept = function(){
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if (state.preIntercepted){
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state.preIntercepted = false;
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forEach(windowToProcess, function({name, object}){
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const originalPropertyDescriptor = originalPropertyDescriptors[name].get(object);
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if (originalPropertyDescriptor){
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Object.defineProperty(
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object,
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name,
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{
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enumerable: true,
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configurable: true,
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get: exportFunction(function(){
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if (forceLoad){
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logging.warning("force load the settings. Calling stack:", (new Error()).stack);
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undoPreIntercept();
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settings.forceLoad();
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doRealIntercept();
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const descriptor = Object.getOwnPropertyDescriptor(object, name);
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return descriptor.value || descriptor.get.call(this);
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}
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else {
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logging.notice("API blocked (%s)", name);
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const url = getURL(window);
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if (!url){
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return undef;
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}
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const error = new Error();
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apis.notify({
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url,
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errorStack: error.stack,
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messageId: "preBlock",
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timestamp: new Date(),
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functionName: name,
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dataURL: false
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});
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return;
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}
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}, window),
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set: exportFunction(function(){}, window)
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}
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originalPropertyDescriptor
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);
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});
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preIntercepted = true;
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}
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};
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const undoPreIntercept = function(){
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if (preIntercepted){
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preIntercepted = false;
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forEachFunction(function({name, object}){
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const originalPropertyDescriptor = originalPropertyDescriptors[name].get(object);
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if (originalPropertyDescriptor){
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Object.defineProperty(
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object,
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name,
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originalPropertyDescriptor
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);
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}
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});
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}
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};
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const doRealIntercept = function(){
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if (!intercepted){
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scope.intercept({subject: window}, apis);
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intercepted = true;
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}
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});
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}
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};
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if (!state.preIntercepted){
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forEach(windowToProcess, function({name, object}){
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const map = originalPropertyDescriptors[name] || new WeakMap();
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originalPropertyDescriptors[name] = map;
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const originalPropertyDescriptor = Object.getOwnPropertyDescriptor(object, name);
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if (!originalPropertyDescriptor){
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return;
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}
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map.set(object, originalPropertyDescriptor);
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Object.defineProperty(
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object,
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name,
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{
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enumerable: true,
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configurable: true,
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get: exportFunction(function(){
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if (forceLoad){
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logging.warning("force load the settings. Calling stack:", (new Error()).stack);
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undoPreIntercept();
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settings.forceLoad();
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doRealIntercept(windowToProcess, apis, state);
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const descriptor = Object.getOwnPropertyDescriptor(object, name);
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return descriptor.value || descriptor.get.call(this);
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}
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else {
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logging.notice("API blocked (%s)", name);
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const url = getURL(windowToProcess);
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if (!url){
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return undef;
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}
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const error = new Error();
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apis.notify({
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url,
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errorStack: error.stack,
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messageId: "preBlock",
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timestamp: new Date(),
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functionName: name,
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dataURL: false
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});
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return;
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}
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}, windowToProcess),
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set: exportFunction(function(){}, windowToProcess)
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}
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);
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});
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state.preIntercepted = true;
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}
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return undoPreIntercept;
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};
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scope.preIntercept = function preIntercept({subject: windowToProcess}, apis){
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if (!settings.isStillDefault){
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logging.message("settings already loaded -> no need to pre intercept");
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scope.intercept({subject: windowToProcess}, apis);
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}
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else {
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logging.message("settings not loaded -> need to pre intercept");
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const state = {
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preIntercepted: false,
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intercepted: false
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};
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doPreIntercept();
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const undoPreIntercept = doPreIntercept(windowToProcess, apis, state);
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settings.onloaded(function(){
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undoPreIntercept();
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doRealIntercept();
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doRealIntercept(windowToProcess, apis, state);
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});
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}
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};
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function getDataURL(object, prefs){
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return (
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object &&
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prefs("storeImageForInspection") &&
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prefs("showNotifications")?
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(
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object instanceof HTMLCanvasElement?
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object.toDataURL():
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(
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object.canvas instanceof HTMLCanvasElement?
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object.canvas.toDataURL():
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false
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)
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):
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false
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);
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}
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let extensionID = extension.extensionID;
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scope.intercept = function intercept({subject: window}, {check, checkStack, ask, notify, prefs}){
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function getDataURL(object, prefs){
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return (
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object &&
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prefs("storeImageForInspection") &&
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prefs("showNotifications")?
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(
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object instanceof HTMLCanvasElement?
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object.toDataURL():
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(
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object.canvas instanceof HTMLCanvasElement?
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object.canvas.toDataURL():
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false
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)
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):
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false
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);
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}
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function generateChecker(name, changedFunction, siteStatus, original){
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return function checker(callingDepth = 2){
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const error = new Error();
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const errorStack = error.stack;
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try {
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// return original if the extension itself requested the function
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if (
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errorStack
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.split("\n", callingDepth + 2)[callingDepth + 1]
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.split("@", callingDepth + 1)[1]
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.startsWith(extensionID)
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){
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return {allow: true, original, window};
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}
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function generateChecker({
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name, changedFunction, siteStatus, original,
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window: windowToProcess, prefs, notify, checkStack, ask
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}){
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return function checker(callingDepth = 2){
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const errorStack = (new Error()).stack;
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try {
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// return original if the extension itself requested the function
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if (
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errorStack
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.split("\n", callingDepth + 2)[callingDepth + 1]
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.split("@", callingDepth + 1)[1]
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.startsWith(extensionID)
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){
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return {allow: true, original, window: windowToProcess};
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}
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catch (e) {
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// stack had an unknown form
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}
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if (checkStack(errorStack)){
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return {allow: true, original, window};
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}
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const funcStatus = changedFunction.getStatus(this, siteStatus, prefs);
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const This = this;
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function notifyCallback(messageId){
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notify({
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url: getURL(window),
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errorStack,
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messageId,
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timestamp: new Date(),
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functionName: name,
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}
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catch (error) {
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// stack had an unknown form
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}
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if (checkStack(errorStack)){
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return {allow: true, original, window: windowToProcess};
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}
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const funcStatus = changedFunction.getStatus(this, siteStatus, prefs);
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const This = this;
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function notifyCallback(messageId){
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notify({
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url: getURL(windowToProcess),
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errorStack,
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messageId,
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timestamp: new Date(),
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functionName: name,
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api: changedFunction.api,
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dataURL: getDataURL(This, prefs)
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});
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}
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const protectedAPIFeatures = prefs("protectedAPIFeatures");
|
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if (
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funcStatus.active &&
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(
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!protectedAPIFeatures.hasOwnProperty(name + " @ " + changedFunction.api) ||
|
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protectedAPIFeatures[name + " @ " + changedFunction.api]
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)
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){
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if (funcStatus.mode === "ask"){
|
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funcStatus.mode = ask({
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window: windowToProcess,
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type: changedFunction.type,
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api: changedFunction.api,
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dataURL: getDataURL(This, prefs)
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canvas: this instanceof HTMLCanvasElement?
|
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this:
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(
|
||||
this &&
|
||||
(this.canvas instanceof HTMLCanvasElement)?
|
||||
this.canvas:
|
||||
false
|
||||
),
|
||||
errorStack
|
||||
});
|
||||
}
|
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const protectedAPIFeatures = prefs("protectedAPIFeatures");
|
||||
if (
|
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funcStatus.active &&
|
||||
(
|
||||
!protectedAPIFeatures.hasOwnProperty(name + " @ " + changedFunction.api) ||
|
||||
protectedAPIFeatures[name + " @ " + changedFunction.api]
|
||||
)
|
||||
){
|
||||
if (funcStatus.mode === "ask"){
|
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funcStatus.mode = ask({
|
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window: window,
|
||||
type: changedFunction.type,
|
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api: changedFunction.api,
|
||||
canvas: this instanceof HTMLCanvasElement?
|
||||
this:
|
||||
(
|
||||
this &&
|
||||
(this.canvas instanceof HTMLCanvasElement)?
|
||||
this.canvas:
|
||||
false
|
||||
),
|
||||
errorStack
|
||||
switch (funcStatus.mode){
|
||||
case "allow":
|
||||
return {allow: true, original, window: windowToProcess};
|
||||
case "fake":
|
||||
return {
|
||||
allow: "fake",
|
||||
prefs,
|
||||
notify: notifyCallback,
|
||||
window: windowToProcess,
|
||||
original
|
||||
};
|
||||
//case "block":
|
||||
default:
|
||||
return {allow: false, notify: notifyCallback};
|
||||
}
|
||||
}
|
||||
else {
|
||||
return {allow: true, original, window: windowToProcess};
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
function interceptFunctions(windowToProcess, siteStatus, {checkStack, ask, notify, prefs}){
|
||||
apiNames.forEach(function(name){
|
||||
const changedFunction = changedFunctions[name];
|
||||
const functionStatus = changedFunction.getStatus(undefined, siteStatus, prefs);
|
||||
logging.verbose("status for", name, ":", functionStatus);
|
||||
if (functionStatus.active){
|
||||
getAllFunctionObjects(windowToProcess, changedFunction).forEach(function(object){
|
||||
if (object){
|
||||
const original = object[name];
|
||||
const checker = generateChecker({
|
||||
name, changedFunction, siteStatus, original,
|
||||
window: windowToProcess, prefs, checkStack, ask, notify
|
||||
});
|
||||
}
|
||||
switch (funcStatus.mode){
|
||||
case "allow":
|
||||
return {allow: true, original, window};
|
||||
case "fake":
|
||||
return {
|
||||
allow: "fake",
|
||||
prefs,
|
||||
notify: notifyCallback,
|
||||
window,
|
||||
original
|
||||
};
|
||||
//case "block":
|
||||
default:
|
||||
return {
|
||||
allow: false,
|
||||
notify: notifyCallback
|
||||
};
|
||||
}
|
||||
}
|
||||
else {
|
||||
return {allow: true, original, window};
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
const siteStatus = check({url: getURL(window)});
|
||||
logging.verbose("status for page", window, siteStatus);
|
||||
if (siteStatus.mode !== "allow"){
|
||||
apiNames.forEach(function(name){
|
||||
const changedFunction = changedFunctions[name];
|
||||
const functionStatus = changedFunction.getStatus(undefined, siteStatus, prefs);
|
||||
logging.verbose("status for", name, ":", functionStatus);
|
||||
if (functionStatus.active){
|
||||
(
|
||||
Array.isArray(changedFunction.object)?
|
||||
changedFunction.object:
|
||||
[changedFunction.object]
|
||||
).map(function(name){
|
||||
if (name){
|
||||
const constructor = getWrapped(window)[name];
|
||||
if (constructor){
|
||||
return constructor.prototype;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}).concat(
|
||||
changedFunction.objectGetters?
|
||||
changedFunction.objectGetters.map(function(objectGetter){
|
||||
return objectGetter(getWrapped(window));
|
||||
}):
|
||||
[]
|
||||
).forEach(function(object){
|
||||
if (object){
|
||||
const original = object[name];
|
||||
const checker = generateChecker(name, changedFunction, siteStatus, original);
|
||||
const descriptor = Object.getOwnPropertyDescriptor(object, name);
|
||||
if (descriptor){
|
||||
if (descriptor.hasOwnProperty("value")){
|
||||
if (changedFunction.fakeGenerator){
|
||||
descriptor.value = exportFunction(
|
||||
changedFunction.fakeGenerator(checker, original, window),
|
||||
window
|
||||
);
|
||||
}
|
||||
else {
|
||||
descriptor.value = null;
|
||||
}
|
||||
const descriptor = Object.getOwnPropertyDescriptor(object, name);
|
||||
if (descriptor){
|
||||
if (descriptor.hasOwnProperty("value")){
|
||||
if (changedFunction.fakeGenerator){
|
||||
descriptor.value = exportFunction(
|
||||
changedFunction.fakeGenerator(checker, original, windowToProcess),
|
||||
windowToProcess
|
||||
);
|
||||
}
|
||||
else {
|
||||
descriptor.get = exportFunction(function(){
|
||||
return exportFunction(
|
||||
changedFunction.fakeGenerator(checker),
|
||||
window
|
||||
);
|
||||
}, window);
|
||||
}
|
||||
Object.defineProperty(object, name, descriptor);
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
changedGetters.forEach(function(changedGetter){
|
||||
const name = changedGetter.name;
|
||||
const functionStatus = changedGetter.getStatus(undefined, siteStatus, prefs);
|
||||
logging.verbose("status for", changedGetter, ":", functionStatus);
|
||||
if (functionStatus.active){
|
||||
changedGetter.objectGetters.forEach(function(objectGetter){
|
||||
const object = objectGetter(getWrapped(window));
|
||||
if (object){
|
||||
const descriptor = Object.getOwnPropertyDescriptor(object, name);
|
||||
if (descriptor && descriptor.hasOwnProperty("get")){
|
||||
const original = descriptor.get;
|
||||
const checker = generateChecker(name, changedGetter, siteStatus, original);
|
||||
const getter = changedGetter.getterGenerator(checker, original, window);
|
||||
descriptor.get = exportFunction(getter, window);
|
||||
|
||||
if (descriptor.hasOwnProperty("set") && changedGetter.setterGenerator){
|
||||
const setter = changedGetter.setterGenerator(window, descriptor.set, prefs);
|
||||
descriptor.set = exportFunction(setter, window);
|
||||
}
|
||||
|
||||
Object.defineProperty(object, name, descriptor);
|
||||
}
|
||||
else if (
|
||||
changedGetter.valueGenerator &&
|
||||
descriptor && descriptor.hasOwnProperty("value")
|
||||
){
|
||||
const protectedAPIFeatures = prefs("protectedAPIFeatures");
|
||||
if (
|
||||
functionStatus.active &&
|
||||
(
|
||||
!protectedAPIFeatures.hasOwnProperty(name + " @ " + changedGetter.api) ||
|
||||
protectedAPIFeatures[name + " @ " + changedGetter.api]
|
||||
)
|
||||
){
|
||||
switch (functionStatus.mode){
|
||||
case "ask": case "block": case "fake":
|
||||
descriptor.value = changedGetter.valueGenerator({
|
||||
mode: functionStatus.mode,
|
||||
original: descriptor.value,
|
||||
notify: function notifyCallback(messageId){
|
||||
notify({
|
||||
url: getURL(window),
|
||||
errorStack: (new Error()).stack,
|
||||
messageId,
|
||||
timestamp: new Date(),
|
||||
functionName: name,
|
||||
api: changedGetter.api
|
||||
});
|
||||
}
|
||||
});
|
||||
Object.defineProperty(object, name, descriptor);
|
||||
break;
|
||||
}
|
||||
descriptor.value = null;
|
||||
}
|
||||
}
|
||||
else {
|
||||
logging.error("Try to fake non getter property:", changedGetter);
|
||||
descriptor.get = exportFunction(function(){
|
||||
return exportFunction(
|
||||
changedFunction.fakeGenerator(checker),
|
||||
windowToProcess
|
||||
);
|
||||
}, windowToProcess);
|
||||
}
|
||||
Object.defineProperty(object, name, descriptor);
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
}
|
||||
function interceptGetters(windowToProcess, siteStatus, {checkStack, ask, notify, prefs}){
|
||||
changedGetters.forEach(function(changedGetter){
|
||||
const name = changedGetter.name;
|
||||
const functionStatus = changedGetter.getStatus(undefined, siteStatus, prefs);
|
||||
logging.verbose("status for", changedGetter, ":", functionStatus);
|
||||
if (functionStatus.active){
|
||||
changedGetter.objectGetters.forEach(function(objectGetter){
|
||||
const object = objectGetter(getWrapped(windowToProcess));
|
||||
if (object){
|
||||
const descriptor = Object.getOwnPropertyDescriptor(object, name);
|
||||
if (descriptor && descriptor.hasOwnProperty("get")){
|
||||
const original = descriptor.get;
|
||||
const checker = generateChecker({
|
||||
name, changedFunction: changedGetter, siteStatus, original,
|
||||
window: windowToProcess, prefs, checkStack, ask, notify
|
||||
});
|
||||
const getter = changedGetter.getterGenerator(checker, original, windowToProcess);
|
||||
descriptor.get = exportFunction(getter, windowToProcess);
|
||||
|
||||
if (descriptor.hasOwnProperty("set") && changedGetter.setterGenerator){
|
||||
const setter = changedGetter.setterGenerator(
|
||||
windowToProcess,
|
||||
descriptor.set,
|
||||
prefs
|
||||
);
|
||||
descriptor.set = exportFunction(setter, windowToProcess);
|
||||
}
|
||||
|
||||
Object.defineProperty(object, name, descriptor);
|
||||
}
|
||||
else if (
|
||||
changedGetter.valueGenerator &&
|
||||
descriptor && descriptor.hasOwnProperty("value")
|
||||
){
|
||||
const protectedAPIFeatures = prefs("protectedAPIFeatures");
|
||||
if (
|
||||
functionStatus.active &&
|
||||
(
|
||||
!protectedAPIFeatures.hasOwnProperty(name + " @ " + changedGetter.api) ||
|
||||
protectedAPIFeatures[name + " @ " + changedGetter.api]
|
||||
)
|
||||
){
|
||||
switch (functionStatus.mode){
|
||||
case "ask": case "block": case "fake":
|
||||
descriptor.value = changedGetter.valueGenerator({
|
||||
mode: functionStatus.mode,
|
||||
original: descriptor.value,
|
||||
notify: function notifyCallback(messageId){
|
||||
notify({
|
||||
url: getURL(windowToProcess),
|
||||
errorStack: (new Error()).stack,
|
||||
messageId,
|
||||
timestamp: new Date(),
|
||||
functionName: name,
|
||||
api: changedGetter.api
|
||||
});
|
||||
}
|
||||
});
|
||||
Object.defineProperty(object, name, descriptor);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
else {
|
||||
logging.error("Try to fake non getter property:", changedGetter);
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
}
|
||||
scope.intercept = function intercept({subject: windowToProcess}, apis){
|
||||
const siteStatus = apis.check({url: getURL(windowToProcess)});
|
||||
logging.verbose("status for page", windowToProcess, siteStatus);
|
||||
if (siteStatus.mode !== "allow"){
|
||||
interceptFunctions(windowToProcess, siteStatus, apis);
|
||||
interceptGetters(windowToProcess, siteStatus, apis);
|
||||
}
|
||||
};
|
||||
}());
|
||||
Loading…
Add table
Add a link
Reference in a new issue