René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Insecure Proxy Behavior with Invoke-(RestMethod|WebRequest) on 7.4.0-preview2","articleBody":"### Prerequisites\n\n- [X] Write a descriptive title.\n- [X] Make sure you are able to repro it on the [latest released version](https://github.com/PowerShell/PowerShell/releases)\n- [X] Search the existing issues.\n- [X] Refer to the [FAQ](https://github.com/PowerShell/PowerShell/blob/master/docs/FAQ.md).\n- [X] Refer to [Differences between Windows PowerShell 5.1 and PowerShell](https://docs.microsoft.com/powershell/scripting/whats-new/differences-from-windows-powershell).\n\n### Steps to reproduce\n\nI use a number of script-based PWSH modules. In addition to using `Invoke-RestMethod` for a lot of API calls.  These calls/modules are executed in a corporate environment with insecure/zero-trust proxies all over the place.  The proxies cannot be avoided.\r\n\r\nWhen testing PWSH v7.4.0-preview2, all script-based modules and IRM/IWR throw an error.\r\nEg. https://github.com/dell/OpenManage-PowerShell-Modules\r\n\r\nI believe this is part of PR #18595.  It seems that in certain scenarios, the change is breaking.\r\n\r\nAdding the following to script-based modules and repos would be a large effort with external modules being out of my control.  Unclear of best approach to mitigate in order to work before/after the 7.4.0 threshold.\r\n```\r\nif ($psVersionTable.PSVersion.Major -ge 7 -and $psVersionTable.PSVersion.Minor -ge 4) {\r\n    $querySplat.Add('AllowInsecureRedirect',$true)\r\n}\r\n```\n\n### Expected behavior\n\n```console\n[2881.31]ms GitHub\u003e # Works before 7.4.0-preview2\r\n$querySplat = @{\r\n    Method = 'POST'\r\n    URI = $URI\r\n    Body = $bodyJSON\r\n    SkipCertificateCheck = $true\r\n    ContentType = 'application/json'\r\n}\r\nInvoke-RestMethod @querySplat\r\nId                    : a1bf17dd-d590-4929-8f0a-7357bed828f8   \r\nDescription           : abcde.ab@OU=Groups,DC=test,DC=Contosa,DC=com\r\nName                  : API\r\n...\n```\n\n\n### Actual behavior\n\n```console\n[2881.31]ms GitHub\u003e # Works before 7.4.0-preview2\r\n$querySplat = @{\r\n    Method = 'POST'\r\n    URI = $URI\r\n    Body = $bodyJSON\r\n    SkipCertificateCheck = $true\r\n    ContentType = 'application/json'\r\n}\r\nInvoke-RestMethod @querySplat\r\n\r\nInvoke-RestMethod: \r\nLine |\r\n   9 |  Invoke-RestMethod @querySplat\r\n     |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r\n     | This operation is not supported for a relative URI.\r\n```\n```\n\n\n### Error details\n\n```console\nException             : \r\n    Type       : System.InvalidOperationException\r\n    TargetSite : \r\n        Name          : get_Scheme\r\n        DeclaringType : uri\r\n        MemberType    : Method\r\n        Module        : System.Private.Uri.dll\r\n    Message    : This operation is not supported for a relative URI.\r\n    Source     : System.Private.Uri\r\n    HResult    : -2146233079\r\n    StackTrace : \r\n   at System.Uri.get_Scheme()\r\n   at Microsoft.PowerShell.Commands.WebRequestPSCmdlet.ProcessRecord()\r\n   at System.Management.Automation.CommandProcessor.ProcessRecord()\r\nCategoryInfo          : NotSpecified: (:) [Invoke-RestMethod], InvalidOperationException\r\nFullyQualifiedErrorId : System.InvalidOperationException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand\r\nInvocationInfo        : \r\n    MyCommand        : Invoke-RestMethod\r\n    ScriptLineNumber : 8\r\n    OffsetInLine     : 1\r\n    HistoryId        : 8\r\n    Line             : Invoke-RestMethod @querySplat \r\n    Statement        : Invoke-RestMethod @querySplat \r\n    PositionMessage  : At line:8 char:1\r\n                       + Invoke-RestMethod @querySplat \r\n                       + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r\n    InvocationName   : Invoke-RestMethod\r\n    CommandOrigin    : Internal\r\nScriptStackTrace      : at \u003cScriptBlock\u003e, \u003cNo file\u003e: line 8\n```\n\n\n### Environment data\n\n```powershell\nName                           Value\r\n----                           -----\r\nPSVersion                      7.4.0-preview.2\r\nPSEdition                      Core\r\nGitCommitId                    7.4.0-preview.2\r\nOS                             Microsoft Windows 10.0.19045\r\nPlatform                       Win32NT\r\nPSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}       \r\nPSRemotingProtocolVersion      2.3\r\nSerializationVersion           1.1.0.1\r\nWSManStackVersion              3.0\n```\n\n\n### Visuals\n\n_No response_","author":{"url":"https://github.com/crlogic","@type":"Person","name":"crlogic"},"datePublished":"2023-04-06T21:43:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":19},"url":"https://github.com/19461/PowerShell/issues/19461"}