NET class used for downloading files is the class. If the script is to be run on a server running Windows Server Core, choose a more universal method.Ī common. Performance is good enough for small downloads, but there are definitely better options for situations where speed is required. This cmdlet shines when you need to persist cookies across multiple requests (for instance HTTP Forms Auth before downloading the file). In some cases you can use the -UseBasicParsing parameter, but it does not work in all cases. For example, this cmdlet cannot be used on Windows Server Core edition servers as the Internet Explorer binaries are not included by default. If anyone knows specifics on how this cmdlet operates, let me know!.Īnother potentially serious con for this method is the reliance on Internet Explorer. This adds a huge performance hit and potential memory issues for large files. Once the file has been fully loaded, it is flushed to disk. From what I have observed, the HTTP response stream is buffered into memory. Cookies can also be persisted between mutiple requests through the use of the -Session and -WebSession parameters. Integration with Write-Progress is handy while watching paint dry scripts run (assuming you know the total file size). With the cmdlet already available it is super easy to get started and use. Write-Output "Time taken: $((Get-Date).Subtract($start_time).Seconds) second(s)" Invoke-WebRequest -Uri $url -OutFile $output It is built into PowerShell and can be used in the following method: $url = ""
The first and most obvious option is the Invoke-WebRequest cmdlet. I will be downloading a test file from Internode at the following URL: The scripts will be executed 10 times each with the average displayed as the result.
The test setup consists of PowerShell 4 running on Windows 8.1 圆4 with my VDSL connection curently synced at 35.9/10.4 mbps. The point is to show the difference in execution time and performance. Today's testing is not highly scientific. This post will describe three methods for downloading files using PowerShell - weighed up with their pros and cons. This blessing can equally be a curse as things can get complicated. NET framework enables almost unlimited possibilites inside the scripting realm. Perhaps the greatest strength of PowerShell is it's foundation on the.
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