Technique - Exercise

ZiBaT => Peter Levinsky => Tech => exercise

Nice Tools To Have

Updated : 2022-09-05

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 three tools which can be relevant for you in your time at 3^rd semester.

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.
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.
Postman
When you are to send all kind of http request; a tool like Postman is quite easy to use.

Tool 1: SocketTest

For trying out (not test) simple network programs like socket programming (TCP or UDP) you can use 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://www.java.com/en/download/

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:

SocketTestScreen

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

For some background see CN WiresharkLab p. 105-106

This tool snifs all packets/commiunication to and from your computer - or rather your network-card i.e. can not see any communication on localhost!!!

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:

Wireshark-screen

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:

wireshark-screen

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

This tool can be used as a smart http-client, which can send GET,POST,PUT,DELETE etc HTTP request.

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

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

postman-screen

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/2022e-tek/SEMESTER.htm) and sometimes the body .
You will be able to see yhe response.