gvm install grails results in an exception

[danleahy]

Hi, your posh-gvm module to install grails is not working, tried now on 2 machines both Windows 10 Power shell version 5

same command to install groovy works fine gvm install groovy works fine

Exception

PS C:\Users\Daniel\Documents\WindowsPowerShell\Modules> gvm install grails

Downloading: grails 3.3.3

Exception calling "GetResponse" with "0" argument(s): "The request was aborted: Could not create SSL/TLS secure channel." At C:\Users\Daniel\Documents\WindowsPowerShell\Modules\posh-gvm\Utils.ps1:468 char:5

• $response = $request.GetResponse()

• 
  + CategoryInfo          : NotSpecified: (:) [], ParentContainsErrorRecordException
  + FullyQualifiedErrorId : WebException

PS C:\Users\Daniel\Documents\WindowsPowerShell\Modules> $PSVersionTable.PSVersion

Major Minor Build Revision

---

5 1 16299 251

[rdmueller]

I tried to debug the script a little bit. It seems that gvm tries to download grails from http://api.sdkman.io/download/grails/3.3.3?platform=posh which is not an https url.

The URL works and changing it to https for gvm does not resolve the problem :-(

I found a german blog post which states that it might be a problem with the TLS versions supported by the server https://www.frankysweb.de/powershell-es-konnte-kein-geschuetzter-ssltls-kanal-erstellt-werden/ . It basically states that if you execute

$AllProtocols = [System.Net.SecurityProtocolType]'Tls11,Tls12'
[System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols

on you powershell before doing gvm install grails, it works. I gave it a try and it really works. But I don't know if it weakens your security!

another workaround is to manually download grails from the location above and put it in your c:/users/[userid]/.poshgvm/.meta/archives/ folder. gvm will then notice that it already has been downloaded and use it.

hope that helps

[kastork]

This works for getting Kotlin to install also. Almost. The archive won't unzip for some reason.