Tools to help detecting errors (Not testing)

Mission:

To install and have access to different tools to ease debugging programs.

Background:

You can have a lot of different tools helping you developing programs. In this collection you find four tools which can be relevant for you in your time at 3^rd semester.

1. SocketTest
   When developing socket programs either tcp or udp; a tool like SocketTest is very good. This tool can act like a tcp server or client or as a udp server or client.
    
2. Wireshark
   When checking communication to and from your computer; a tool like Wireshark is a good packet sniffer, which snifs all communication at any layer to and from your computer, and it have a good presentation.
    
3. Postman
   When you are to send all kind of http request; a tool like Postman is quite easy to use.
    
4. Fiddler4
   When you are to sniffer http(web) trafic locally i.e. on localhost (or to / from a remote computer); a tool like Fiddler4 is very good, it presents the request and response fine.
    

Tool 1: SocketTest

Before SocketTest can run you need the Java Runtime Environment (jre),
(NB Perhaps you already have it installed - ofcause then you do not need it)
so download and install jre : https://java.com/en/download/win10.jsp

Download and unzip SocketTest : https://sourceforge.net/projects/sockettest/

Now you can run the SocketTest (click the exe-file) - and you should have this picture:

• When open Client-tab, you can act as an TCP-client
• When open Server-tab, you can act as an TCP-Server
• When open UDP-tab, you can act as an UDP-client or UDP-Server

Tool 2: Wireshark

Download and install this tool from: https://www.wireshark.org/download.html can work on most computers - but for some reason it will not work on very, very few computers.

Now you can run the Wireshark - and you should have this picture:

Now you can start the packet sniffer by clicking on the connection you will like to see - in this case the wifi-connection - and the sniffing starting:

Now you have access to all communication to and from your computer.

Small exercise Start a browser and open http://pele-easj.dk see in wireshark the packet sent and received.

Tool 3: Postman

Download and install this tool from: https://www.getpostman.com/ .

Now you can run the Postman - and you should have this picture:

From here you can compose your HTTP-request, by setting the method (get, post etc) the uri (where you go to e.g pele-easj.dk/2017e-tek/SEMESTER.htm) and sometimes the body .
You will be able to see yhe response.

Small exercise compose a http request to see the homepage of Zealand.dk.

Tool 4: Fiddler4

Download and install this tool from: https://www.telerik.com/download/fiddler-wizard

Now you can run the Fiddler4 - and you should have this picture

For each request you can open and see the details of all elements in the http-request or http-response.

Small exercise, start the fiddler and from a browser open the pele-easj.dk page, then find the request in fiddler.