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<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Lesson
Plan Title:</span></b><span style='font-family:"Arial","sans-serif"'> Http
Basics <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Concept /
Topic To Teach:</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>This lesson
presents the basics for understanding the transfer of data between the browser
and the web application.<br>
<br>
Client Request: <span style='mso-bidi-font-weight:bold'>How HTTP works:</span> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>All HTTP transactions
follow the same general format. Each client request and server response has
three parts: the request or response line, a header section, and the entity
body. The client initiates a transaction as follows: <br>
<br>
The client contacts the server and sends a document request <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><br>
GET /index.html?param=value HTTP/1.0<br>
<br>
Next, the client sends optional header information to inform the server of its
configuration and the document formats it will accept.<br>
<br>
User-Agent: Mozilla/4.06 Accept: image/gif,
image/jpeg, */* <br>
<br>
After sending the request and headers, the client may send additional data.
This data is mostly used by CGI programs using the POST method.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>General
Goal(s):</span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Enter your
name in the input field below and press "go" to submit. The server
will accept the request, reverse the input, and display it back to the user,
illustrating the basics of handling an HTTP request. <br>
<br>
The user should become familiar with the features of WebGoat by manipulating
the above buttons to view hints and solution. We have to use WebScarab for the first time<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Solution:</span></b><span
style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Add a Proxy on localhost in the settings of your browser. Then you can start WebScarab .We have to select "intercept request" in the tab "Intercept".<o:p></o:p></span></p>
<img src="/WebGoat/lesson_solutions/HttpBasics_files/webscarab1.jpg">
<p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element:
field-begin'></span><span style='mso-spacerun:yes'>�</span>SEQ Figure \* ARABIC
<span style='mso-element:field-separator'></span><![endif]--><span
style='mso-no-proof:yes'>1</span><!--[if supportFields]><span
style='mso-element:field-end'></span><![endif]--> Intercept Request<span
style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Fill out your
name and click the button Go! We get a new WebScarab window, where we can find the parameter person.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<img src="/WebGoat/lesson_solutions/HttpBasics_files/webscarab2.jpg">
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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Solution by Erwin Geirnaert
</td>
<td valign='MIDDLE' align='RIGHT'><img hspace='0' vspace='0' border='0' alt='ZION SECURITY' src='images/logos/zionsecurity.gif'></td>
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