lulzsun · March 11, 2023 16:27 · Mar 11, 2023 · Mar 6, 2023 · Mar 6, 2023 · Mar 6, 2023
diff --git a/README.md b/README.md
@@ -33,4 +33,9 @@ The script will intercept http POST requests and modify the request body to remo
 
 [Alternative solutions](https://github.com/imdonix/canvas-antidetect) tend to patch (prototype polluting) browser events that send the `window.blur` and `window.focus` events. 
 
-However, this script takes a different approach by patching `window.XMLHttpRequest` to intercept and modify the requests before being sent, which achieves the same result. I feel like this is a cleaner approach and doesn't mess with page functionality relating to blur and focus.
+However, this script takes a different approach by patching `window.XMLHttpRequest` to intercept and modify the requests before being sent, which achieves the same result. I feel like this is a cleaner approach and doesn't mess with page functionality relating to blur and focus.
+
+Optionally, you can choose to disable the userscript temporarily by opening up the developer tools and type the following:
+```js
+window.cantvas = false;
+```
diff --git a/canTvas.user.js b/canTvas.user.js
@@ -2,7 +2,7 @@
 // @name         canTvas
 // @namespace    https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256
 // @downloadURL  https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.user.js
-// @version      0.1
+// @version      0.2
 // @description  Prevents the logging of specific canvas lms quiz events.
 // @author       lulzsun
 // @match        http*://*.instructure.com/*
@@ -13,7 +13,8 @@
 
 (function() {
     'use strict';
-
+
+    window.cantvas = true;
     var oldXHROpen = window.XMLHttpRequest.prototype.open;
     var oldXHRSend = window.XMLHttpRequest.prototype.send;
     window.XMLHttpRequest.prototype.open = function (method, url) {
@@ -29,17 +30,19 @@
         // testing for quiz events
         var regexMatches = new RegExp("*/api/v1/courses/*/quizzes/*/submissions/*/events".replace(/\*/g, "[^ ]*"));
 
-        if (regexMatches.test(url)) {
+        if (regexMatches.test(url) && window.cantvas === true) {
             if (body !== undefined) {
                 var parsedBody = JSON.parse(body);
                 var i = parsedBody["quiz_submission_events"].length;
+                var prevents = 0;
                 while (i--) {
                     var element = parsedBody["quiz_submission_events"][i];
                     if (element["event_type"] === "page_focused" || element["event_type"] === "page_blurred") {
                         parsedBody["quiz_submission_events"].splice(i, 1);
-                        console.warn(`[canTvas] '${element["event_type"]}' event was prevented.`);
+                        prevents++;
                     }
                 }
+                if (prevents > 0) console.warn(`[canTvas] '${prevents}' event(s) were prevented.`);
                 args[0] = JSON.stringify(parsedBody["quiz_submission_events"]);
                 console.log('on send body:', parsedBody["quiz_submission_events"]);
                 if (parsedBody["quiz_submission_events"].length <= 0)

diff --git a/README.md b/README.md
@@ -5,7 +5,7 @@ This script prevents Canvas from recieving or logging certain user interactions
 1. First you need a userscript manager such as: **Tampermonkey** 
     - [Chrome](https://chrome.google.com/webstore/detail/dhdgffkkebhmkfjojejmpbldmpobfkfo) 
     - [Firefox](https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/)
-2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.js)!
+2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.user.js)!
 
 ## Warning
 Make sure the script loads before attempting any tomfoolery. You can open up the developer console and check for a `console.warn` message that looks like this:

diff --git a/canTvas.js → canTvas.user.js b/canTvas.js → canTvas.user.js
@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         canTvas
 // @namespace    https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256
-// @downloadURL  https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.js
+// @downloadURL  https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.user.js
 // @version      0.1
 // @description  Prevents the logging of specific canvas lms quiz events.
 // @author       lulzsun

diff --git a/canTvas.js b/canTvas.js
@@ -37,7 +37,7 @@
                     var element = parsedBody["quiz_submission_events"][i];
                     if (element["event_type"] === "page_focused" || element["event_type"] === "page_blurred") {
                         parsedBody["quiz_submission_events"].splice(i, 1);
-                        console.warn(`[canTvas] '${element["event_type"]}' event was prevented!`);
+                        console.warn(`[canTvas] '${element["event_type"]}' event was prevented.`);
                     }
                 }
                 args[0] = JSON.stringify(parsedBody["quiz_submission_events"]);

diff --git a/canTvas.js b/canTvas.js
@@ -37,7 +37,7 @@
                     var element = parsedBody["quiz_submission_events"][i];
                     if (element["event_type"] === "page_focused" || element["event_type"] === "page_blurred") {
                         parsedBody["quiz_submission_events"].splice(i, 1);
-                        console.warn(`[canTvas] '${element["event_type"]}' event was prevented.`);
+                        console.warn(`[canTvas] '${element["event_type"]}' event was prevented!`);
                     }
                 }
                 args[0] = JSON.stringify(parsedBody["quiz_submission_events"]);

diff --git a/canTvas.md → README.md b/canTvas.md → README.md
diff --git a/canTvas.js b/canTvas.js
@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         canTvas
 // @namespace    https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256
-// @downloadURL  https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/8cb5ef3199d0c7a466df657cc1c207265a11b3d4/canTvas.js
+// @downloadURL  https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.js
 // @version      0.1
 // @description  Prevents the logging of specific canvas lms quiz events.
 // @author       lulzsun

diff --git a/README.md → canTvas.md b/README.md → canTvas.md
@@ -5,7 +5,7 @@ This script prevents Canvas from recieving or logging certain user interactions
 1. First you need a userscript manager such as: **Tampermonkey** 
     - [Chrome](https://chrome.google.com/webstore/detail/dhdgffkkebhmkfjojejmpbldmpobfkfo) 
     - [Firefox](https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/)
-2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/6efe3f9f788475f10fe075061d2ba2023a18a8a4/canTvas.js)!
+2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/canTvas.js)!
 
 ## Warning
 Make sure the script loads before attempting any tomfoolery. You can open up the developer console and check for a `console.warn` message that looks like this:

diff --git a/README.md b/README.md
@@ -5,7 +5,7 @@ This script prevents Canvas from recieving or logging certain user interactions
 1. First you need a userscript manager such as: **Tampermonkey** 
     - [Chrome](https://chrome.google.com/webstore/detail/dhdgffkkebhmkfjojejmpbldmpobfkfo) 
     - [Firefox](https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/)
-2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/8cb5ef3199d0c7a466df657cc1c207265a11b3d4/canTvas.js)!
+2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/6efe3f9f788475f10fe075061d2ba2023a18a8a4/canTvas.js)!
 
 ## Warning
 Make sure the script loads before attempting any tomfoolery. You can open up the developer console and check for a `console.warn` message that looks like this:

diff --git a/README.md b/README.md
@@ -1,5 +1,5 @@
 # canTvas
-This script prevents Canvas from recieving certain user interactions (specifically `page_focused` and `page_blurred`).
+This script prevents Canvas from recieving or logging certain user interactions during quizzes (specifically `page_focused` and `page_blurred`).
 
 # Install
 1. First you need a userscript manager such as: **Tampermonkey** 
@@ -22,10 +22,12 @@ Do note that this script could break depending if Canvas instructure changes the
 var regexMatches = new RegExp("*/api/v1/courses/*/quizzes/*/submissions/*/events".replace(/\*/g, "[^ ]*"));
 ```
 
-Be cautious monitor network POST requests and see if any `page_focused` or `page_blurred` events are being sent. A request payload could look something like this:
+Be cautious and monitor network POST requests to see if any `page_focused` or `page_blurred` events are being sent during a quiz. A request payload could look something like this:
 
 ![Payload](https://raw.githubusercontent.com/imdonix/canvas-antidetect/master/doc/logger.png)
 
+If you do not see any payloads with these events then you are probably safe!
+
 ## How it works
 The script will intercept http POST requests and modify the request body to remove the specified events.
 

diff --git a/README.md b/README.md
@@ -1 +1,34 @@
-# canTvas
+# canTvas
+This script prevents Canvas from recieving certain user interactions (specifically `page_focused` and `page_blurred`).
+
+# Install
+1. First you need a userscript manager such as: **Tampermonkey** 
+    - [Chrome](https://chrome.google.com/webstore/detail/dhdgffkkebhmkfjojejmpbldmpobfkfo) 
+    - [Firefox](https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/)
+2.  Install the script [Here](https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/8cb5ef3199d0c7a466df657cc1c207265a11b3d4/canTvas.js)!
+
+## Warning
+Make sure the script loads before attempting any tomfoolery. You can open up the developer console and check for a `console.warn` message that looks like this:
+
+```
+[canTvas] Userscript loaded successfully.
+```
+
+If you don't see this, then it may be because the url doesn't fit `@match`. You will want to change that to fit your needs.
+
+Do note that this script could break depending if Canvas instructure changes the api url:
+```js
+// testing for quiz events
+var regexMatches = new RegExp("*/api/v1/courses/*/quizzes/*/submissions/*/events".replace(/\*/g, "[^ ]*"));
+```
+
+Be cautious monitor network POST requests and see if any `page_focused` or `page_blurred` events are being sent. A request payload could look something like this:
+
+![Payload](https://raw.githubusercontent.com/imdonix/canvas-antidetect/master/doc/logger.png)
+
+## How it works
+The script will intercept http POST requests and modify the request body to remove the specified events.
+
+[Alternative solutions](https://github.com/imdonix/canvas-antidetect) tend to patch (prototype polluting) browser events that send the `window.blur` and `window.focus` events. 
+
+However, this script takes a different approach by patching `window.XMLHttpRequest` to intercept and modify the requests before being sent, which achieves the same result. I feel like this is a cleaner approach and doesn't mess with page functionality relating to blur and focus.
diff --git a/canTvas.js b/canTvas.js
@@ -1,6 +1,7 @@
 // ==UserScript==
 // @name         canTvas
-// @namespace    https://github.com/lulzsun/canTvas
+// @namespace    https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256
+// @downloadURL  https://gist.github.com/lulzsun/f8eff07e74b40126866d83a17d0fb256/raw/8cb5ef3199d0c7a466df657cc1c207265a11b3d4/canTvas.js
 // @version      0.1
 // @description  Prevents the logging of specific canvas lms quiz events.
 // @author       lulzsun

diff --git a/README.md b/README.md
@@ -0,0 +1 @@
+# canTvas
diff --git a/canTvas.js b/canTvas.js
@@ -0,0 +1,52 @@
+// ==UserScript==
+// @name         canTvas
+// @namespace    https://github.com/lulzsun/canTvas
+// @version      0.1
+// @description  Prevents the logging of specific canvas lms quiz events.
+// @author       lulzsun
+// @match        http*://*.instructure.com/*
+// @match        http*://*.canvas.*.edu/*
+// @icon         https://www.google.com/s2/favicons?sz=64&domain=canvaslms.com
+// @grant        none
+// ==/UserScript==
+
+(function() {
+    'use strict';
+
+    var oldXHROpen = window.XMLHttpRequest.prototype.open;
+    var oldXHRSend = window.XMLHttpRequest.prototype.send;
+    window.XMLHttpRequest.prototype.open = function (method, url) {
+        this._url = url;
+        var args = arguments;
+        return oldXHROpen.apply(this, args);
+    };
+
+    window.XMLHttpRequest.prototype.send = function (body) {
+        var url = this._url;
+        var args = arguments;
+
+        // testing for quiz events
+        var regexMatches = new RegExp("*/api/v1/courses/*/quizzes/*/submissions/*/events".replace(/\*/g, "[^ ]*"));
+
+        if (regexMatches.test(url)) {
+            if (body !== undefined) {
+                var parsedBody = JSON.parse(body);
+                var i = parsedBody["quiz_submission_events"].length;
+                while (i--) {
+                    var element = parsedBody["quiz_submission_events"][i];
+                    if (element["event_type"] === "page_focused" || element["event_type"] === "page_blurred") {
+                        parsedBody["quiz_submission_events"].splice(i, 1);
+                        console.warn(`[canTvas] '${element["event_type"]}' event was prevented.`);
+                    }
+                }
+                args[0] = JSON.stringify(parsedBody["quiz_submission_events"]);
+                console.log('on send body:', parsedBody["quiz_submission_events"]);
+                if (parsedBody["quiz_submission_events"].length <= 0)
+                    return;
+            }
+        }
+        return oldXHRSend.apply(this, args);
+    };
+
+    console.warn(`[canTvas] Userscript loaded successfully.`);
+})();
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