System.Net.WebClient in .bat problem with download zip file Powershell

Hello, I'm preparing a .bat file that downloads few files. I encountered a problem with downloading a larger file. Perhaps it is not the size of the file but a specific link. Well, in the bat file I use the command:

Code:

powershell.exe -Command "(New-Object System.Net.WebClient).DownloadFile('http://download.gigabyte.eu/FileList/Driver/mb_driver_audio_realtek_9series.zip','c:\AutoInstalator_temp\mb_driver_audio_realtek_9series')"

The file has been successfully downloaded but unfortunately has the extension (zip) (.zip) and instead of the content there is a file with the same name but no extension. After unpacking the second file, the content is finally there. But why?

With smaller files of this type, I did not have any problems and I used the same formula.
I also tried Start-BitsTransfer and it's the same problem. The only command that works correctly is Invoke-WebRequest but it is very slow.
Do you know how to solve my problem?

PolarNettles said:

When I run the PS command I get a gzipped archive. It looks like the web server automatically enables HTTP compression even though it's only supposed to do it when the client requests it.

Edit: It looks like the HTTP spec says that if the client doesn't specify an "Accept-Encoding" field then the server can choose whatever compression it wants.

From a quick Google I don't see a quick fix for this but maybe someone with more WebClient experience can chime in on how to automatically decompress the data.

From DownloadFile:

Code:

GET /FileList/Driver/mb_driver_audio_realtek_9series.zip HTTP/1.1 Host: download.gigabyte.eu
 Connection: Keep-Alive
 

 HTTP/1.1 200 OK
 Content-Type: application/x-zip-compressed
 Content-Length: 249491951
 Connection: keep-alive
 Date: Thu, 07 Feb 2019 06:19:55 GMT
 Last-Modified: Fri, 25 Jan 2019 12:05:11 GMT
 ETag: "4f3f257bb6aabcbd28b03d4c426b8a47-24"
 x-amz-meta-cb-realsize: 250605594
 Content-Encoding: gzip

From Firefox:

Code:

GET /FileList/Driver/mb_driver_audio_realtek_9series.zip HTTP/1.1 Host: download.gigabyte.eu
 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
 Accept-Language: en-US,en;q=0.5
 Accept-Encoding: gzip, deflate
 Connection: keep-alive
 Upgrade-Insecure-Requests: 1
 

 HTTP/1.1 200 OK
 Content-Type: application/x-zip-compressed
 Content-Length: 249491951
 Connection: keep-alive
 Date: Tue, 05 Feb 2019 22:43:22 GMT
 Last-Modified: Fri, 25 Jan 2019 12:05:11 GMT
 ETag: "4f3f257bb6aabcbd28b03d4c426b8a47-24"
 x-amz-meta-cb-realsize: 250605594
 Content-Encoding: gzip

Yep and this is a problem ;/ somebody know how to resolve this?

Superfly said:

This is a simpler way...

Code:

Invoke-WebRequest -Uri 'http://download.gigabyte.eu/FileList/Driver/mb_driver_audio_realtek_9series.zip' -OutFile 'test.zip'

(This is on Ubuntu but should work on Windows likewise)

As I said earlier, "Invoke-WebRequest" works correctly but is 5x slower. What significantly extends the download time with a few larger files.

The OP indicated that Invoke-Webrequest is much slower than WebClient.DownloadFile, and that is my experience as well.

But according to Progress bar can significantly impact cmdlet performance · Issue #2138 · PowerShell/PowerShell · GitHub if you turn off the progress bar it goes normal speed. I tried it and it worked for me.

Code:

PS C:\temp> $start = Get-Date; (New-Object System.Net.WebClient).DownloadFile('http://download.gigabyte.eu/FileList/Driver/mb_driver_audio_realtek_9series.zip','c:\temp\mb_driver_audio_realtek_9series.zip'); New-TimeSpan -Start $start

TotalSeconds      : 8.9171472



PS C:\temp> $start = Get-Date; $ProgressPreference = 'SilentlyContinue'; Invoke-WebRequest -Uri 'http://download.gigabyte.eu/FileList/Driver/mb_driver_audio_realtek_9series.zip' -Outfile 'c:\temp\mb_driver_audio_realtek_9series.zip' -UseBasicParsing; New-TimeSpan -Start $start

TotalSeconds      : 8.9849527

PolarNettles said:

The OP indicated that Invoke-Webrequest is much slower than WebClient.DownloadFile, and that is my experience as well.

But according to Progress bar can significantly impact cmdlet performance · Issue #2138 · PowerShell/PowerShell · GitHub if you turn off the progress bar it goes normal speed. I tried it and it worked for me.

Code:

PS C:\temp> $start = Get-Date; (New-Object System.Net.WebClient).DownloadFile('http://download.gigabyte.eu/FileList/Driver/mb_driver_audio_realtek_9series.zip','c:\temp\mb_driver_audio_realtek_9series.zip'); New-TimeSpan -Start $start

TotalSeconds      : 8.9171472



PS C:\temp> $start = Get-Date; $ProgressPreference = 'SilentlyContinue'; Invoke-WebRequest -Uri 'http://download.gigabyte.eu/FileList/Driver/mb_driver_audio_realtek_9series.zip' -Outfile 'c:\temp\mb_driver_audio_realtek_9series.zip' -UseBasicParsing; New-TimeSpan -Start $start

TotalSeconds      : 8.9849527

I don't need a progress bar. Thank you very much :) Working well