#33 : Complete script to download file with Powershell

Powershell can be used to download some files from internet or intranet. We can simply do it with Invoke-WebRequest.

Below is the code which can be used for this purpose :

#--------------------------------------------------------------------------------------------------------------
#-- Script to Download file 
#--------------------------------------------------------------------------------------------------------------

function Download-File ([string]$url , [string]$target)
{
 trap {
  echo "Error occured" 
  continue 
 }
 
 if ( !(Test-path $target ))
 {
  invoke-webrequest $url -OutFile $target
 }
 else 
 {
  echo "Error : Directory does not exit!"
 }

}

#--------------------------------------------------------------------------------------------------------------

Download-File "http://site.foo.com/file.exe" "C:\temp"

#--------------------------------------------------------------------------------------------------------------

Enjoy!

#32 : How to check if TCP/IP Port is open?

Without talking much, please find the code below.

#------------------------------------------------------------------------------------------
#     Script : Check_Port.ps1 
#     Author : Som DT.
#    Purpose : Checking if Port is open on target TCP/IP server from current host 
#------------------------------------------------------------------------------------------

function Check-Port([string]$HostName, [string] $PortNumber) 
{
    #--Set the client --# 
    $tcp = New-Object System.Net.Sockets.TcpClient
    
    #--Connecting to the Port --# 
    $tcp.connect($HostName , $PortNumber ) 
    

}

Enjoy!

#31 : Loading file content into Array of Hash Table

While programming, sometimes we need to read some configuration entries from a flat file. There are several approaches to do it, I have followed the below approach to read file-entries into a hash table which is also an array.
I have assumed that there is a flat file which contains multiple lines of information about employee. This can be configuration settings or it can be anything. I have used this simple example for simplicity -

	#---------------------------------------------------------------------------------------------#
	#--Script to load file into an Array of Hash Table
	#---------------------------------------------------------------------------------------------#
	#--[1]- Let's create a file with entries seperated by comma --#
	$file_name="D:\Check\file.txt"
	echo "1,John,5000" > $file_name echo "2,Jack,3000" >> $file_name
	echo "3,Jack,3000" >> $file_name
	#--[2]- Load the information into an Hash table Array --#
	$emp_data = @()
	$file_entries = gc $file_name
	foreach ( $file_entry in $file_entries )
	{
	$emp_id=$file_entry.split(",")[0]
	$emp_name=$file_entry.split(",")[1]
	$emp_salary=$file_entry.split(",")[2]
	$emp_data += @{emp_id="${emp_id}"; emp_name="$emp_name"; emp_salary="${emp_salary}"}
	}
	#--[3]- Display the same --#
	for ($x=0 ; $x -lt $emp_data.Count ; $x++)
	{
	$emp_data[$x].emp_id
	$emp_data[$x].emp_name
	$emp_data[$x].emp_salary
	}

view raw load_file_to_hash.ps1 hosted with ❤ by GitHub

There might be many other approach to do it, I do not advocate it as a best approach, but if you want to have full control and understandability of the code, you may use the above approach.