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== Try It! Using the console
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Let us try it. Use the console in the dev tools and call the javascript function *webgoat.customjs.phoneHome()*. +
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You should get a response in the console. Your result should look something like:
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You should get a response in the console. Your result should look something like this:
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`phone home said
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{"lessonCompleted:true, ... ,"output":"phone home response is..."`
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Paste the random number, after that, in the text field below.
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(Make sure you got the most recent number, since it is randomly generated each time you call the function)
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(Make sure you got the most recent number since it is randomly generated each time you call the function)
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== Try It! Working with the Network tab
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In this assignment you need to find a specific HTTP request and read a randomized number from it.
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To start click the first button, this wil generate an HTTP request. Try to find the specific HTTP request.
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In this assignment, you need to find a specific HTTP request and read a randomized number.
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To start, click the first button. This will generate an HTTP request. Try to find the specific HTTP request.
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The request should contain a field: `networkNum:`
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Copy the number which is displayed afterwards, into the input field below and click on the check button.
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Copy the number displayed afterward into the input field below and click on the check button.
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== The Console tab
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In the console tab you can see anything, which a loaded JavaScript file may have printed out to it.
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In the console tab, you can see anything that a loaded JavaScript file may have printed out.
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Do not worry if you see something in red. While that is an error, it has probably resolved itself.
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Through the console tab, it is also possible for you to run your own line of JavaScript code.
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Through the console tab, it is also possible for you to run your line of JavaScript code.
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Start by clearing console using the shortcut `CTRL+L`.
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Start by clearing the console using the shortcut `CTRL+L.`
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To run your own JavaScript, simply click inside of the console and write something like:
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`console.log("Hello WebGoat!");` Hit enter. Hello WebGoat should now appear in your console.
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The console also allows you to do some basic arithmetic. If you type for example `1+3` and hit
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enter the console should display 4.
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To run your JavaScript, click inside of the console and write something like:
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`console.log("Hello WebGoat!");` Hit enter. `Hello WebGoat` should now appear in your console.
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The console also allows you to do some basic arithmetic. If you type, for example, `1+3` and hit
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enter, the console should display 4.
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Note: You may see an `undefined` in the console. You can safely ignore this statement,
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it only means, that the JavaScript function you have called did not return anything, therefore `undefined`.
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it only means that the JavaScript function you have called did not return anything, therefore `undefined.`
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image::images/ChromeDev_Console_Ex.jpg[DeveloperToolsConsoleExample,500,500,style="lesson-image"]
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image::images/ChromeDev_Console_Ex.jpg[DeveloperToolsConsoleExample,500,500,style="lesson-image"]
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== The Elements Tab
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The elements tab allows you to look at the HTML and CSS code, that are used to define and style the website.
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The elements tab allows you to look at the HTML and CSS code used to define and style the website.
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=== HTML source
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If you hover over one line you can see that a part of the website turns blue. That means that
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If you hover over one line, you can see that a part of the website turns blue. That means that
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this particular HTML line defines this section of the website.
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The elements tab allows you to make changes to every single HTML element. For example if you click inside
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a paragraph (<p>...</p>) Tag you can edit the content of the website. If you have made your changes and then click enter
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Chrome will actually update the website to show your edits. You can also change the HTML Tag used,
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the classes and id's a tag has and much more.
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The elements tab allows you to make changes to every single HTML element. For example, if you click inside
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a paragraph (<p>...</p>) Tag, you can edit the content of the website. If you have made your changes and then click enter
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Chrome will update the website to show your edits. You can also change the HTML Tag used,
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the classes and id's a tag has, and much more.
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image::images/ChromeDev_Elements.jpg[DeveloperToolsElements,500,350,style="lesson-image"]
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=== CSS source
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Underneath the HTML source, you can find information about the CSS which is used to style the
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Website. Like the HTML, you can also edit the CSS and therefore adjust the styling of the website.
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You can edit specific values, or turn off individual styling.
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You can find information about the CSS used to style the
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website under the HTML source. Like the HTML, you can also edit the CSS and, therefore, adjust the website's styling.
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You can edit specific values or turn off individual styling.
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image::images/ChromeDev_Elements_CSS.jpg[DeveloperToolsElementsCSS,500,350,style="lesson-image"]
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image::images/ChromeDev_Elements_CSS.jpg[DeveloperToolsElementsCSS,500,350,style="lesson-image"]
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== Google Chrome Developer Tools
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To complete certain assignments you sometimes may have to look at the JavaScript
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To complete certain assignments, you sometimes may have to look at the JavaScript
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source code or run a JavaScript command on your own.
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To do that Google Chrome has a set of tools which allows you to do that and much much more.
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While these tools are not specific to Google Chrome, almost every modern browser has a set
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of their own, our introduction will focus on the ones found in Google Chrome.
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You can however still use the browser of your choice, like Firefox or Safari, although some steps of this tutorial
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may be different for you.
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To do that, Google Chrome has a set of tools that allow you to do that and much more.
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While these tools are not specific to Google Chrome, almost every modern browser has a bunch
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of its own. Our introduction will focus on the ones found in Google Chrome.
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You can, however still use the browser of your choice, like Firefox or Safari, although some steps of this tutorial
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maybe different for you.
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Keep in mind that the following tutorial, is not there to teach everything there is about these tools.
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This tutorial will only focus on the essential knowledge you need to complete certain assignments.
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Also if you are already familiar with these Tools you can safely skip these lessons.
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Keep in mind that the following tutorial is not there to teach everything about these tools.
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This tutorial will only focus on the essential knowledge to complete specific assignments.
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Also, if you are already familiar with these tools, you can safely skip these lessons.
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To get started, *open the developer tools*. There are multiple ways to open them:
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To get started: *open the developer tools*. There are multiple ways to open them:
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1. Right click anywhere in the browser window and select the option _"Inspect"_.
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1. Right-click anywhere in the browser window and select the option _"Inspect"_.
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2. Go to the browser menu (three dots in the top right corner), then go to _"More tools"_ and select the option _"Developer tools"_.
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3. Use the keyboard shortcut _Ctrl + Shift + I_
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3. Use the keyboard shortcut _Ctrl + Shift + I_
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== The Sources tab
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In the sources tab you can check out the file system and view all the HTML, CSS and JavaScript files that are used, to
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create the website. Simply click on a file to view its contents.
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In the sources tab, you can check out the file system and view all the HTML, CSS, and JavaScript files used to
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create the website. Click on a file to view its contents.
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image::images/ChromeDev_Sources.jpg[DeveloperToolsSources,400,500,style="lesson-image"]
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== The Network tab
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In the Network tab you can view HTTP requests and responses the website has performed.
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If you want more detailed information on a particular request, just click on it.
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In the Timeline above the blue dots represent when these requests and responses have been performed.
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You can also see the Requests done in a specific time frame, simply by clicking and dragging on the timeline. Now the window
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below, will only show the requests and responses done in that particular time frame.
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In the Network tab, you can view HTTP requests and responses the website has performed.
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Just click on it if you want more detailed information on a particular request.
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The "Timeline" above the blue dots represents when these requests and responses have been performed.
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You can also see the Requests done in a specific time frame simply by clicking and dragging on the timeline. The window
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below will only show the requests and responses done in that time frame.
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image::images/ChromeDev_Network.jpg[DeveloperToolsNetwork,400,500,style="lesson-image"]
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image::images/ChromeDev_Network.jpg[DeveloperToolsNetwork,400,500,style="lesson-image"]
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