When I try to perform command
Invoke-WebRequest -Uri example.com/zip.zip -OutFile C:\SomePath\zip.zip
PowerShell just thinks for few seconds and then exits, PowerShell window is just vanishing.
But when i enter just Invoke-WebRequest, it asks me for parameters but effect is same when i input parameters one by one.
In order to download a file, Invoke-WebRequest isn't the most optimal way as the HTTP response stream is buffered into memory, and once the file has been fully loaded- then only it will be flushed to disk. This can cause a performance impact in case of large files.
I would suggest you to use the System.Net.WebClient DotNET class to download files from your GitHub source. You can refactor your code to something like this:
$url = "http://github.com/zip.zip"
$output = "C:\SomePath\zip.zip"
(New-Object System.Net.WebClient).DownloadFile($url, $output)
How is this cmdlet better than Invoke-WebRequest? You might ask.
With System.Net.WebClient, the speed/performance gets improved a lot as the HTTP response stream is buffered directly to disk throughout the download process (and not splitting the work into fetch-and-flush tasks).
Note: Make sure the local output file (for which you're providing the path in $output) is a valid file and it exists, or else you might get some error while using DownloadFile method.
UPDATE:
Since the above solution doesn't seem to be working as expected in case of compressed files, here's another workaround that can be used for achieving this using PowerShell:
$url = "http://github.com/zip.zip"
$zipOutput = "C:\ZipOutput\" + $(Split-Path -Path $url -Leaf)
$extractedOutput = "C:\ExtractedOutput\"
(New-Object System.Net.WebClient).DownloadFile($url, $zipOutput)
$shellObj = New-Object -ComObject Shell.Application
$files = $shellObj.Namespace($zipOutput).Items()
$shellObj.NameSpace($extractedOutput).CopyHere($files)
Start-Process $extractedOutput
The zip file will be downloaded to the path provided in $zipOutput, and the script will further extract the contents & store extracted contents in the path provided in $extractedOutput. Make sure that the 'C:\ZipOutput' and 'C:\ExtractedOutput' folders exist on your machine where you're executing this script.