Private/Resolve-InvokeWebRequest.ps1
|
Function Resolve-InvokeWebRequest { <# .SYNOPSIS Resolve a URL that returns a 301/302 response and returns the redirected URL Uses Invoke-WebRequest to find 301/302 headers and return the ResponseUri #> [OutputType([System.String])] [CmdletBinding(SupportsShouldProcess = $False)] param ( [Parameter(Mandatory = $True, Position = 0)] [ValidateNotNullOrEmpty()] [System.String] $Uri, [Parameter(Position = 1)] [ValidateNotNullOrEmpty()] [System.String] $UserAgent = [Microsoft.PowerShell.Commands.PSUserAgent]::Chrome ) # Build the Invoke-WebRequest parameters; Use ErrorAction:SilentlyContinue to enable the try/catch to work $iwrParams = @{ MaximumRedirection = 0 Uri = $Uri UseBasicParsing = $True UserAgent = $UserAgent ErrorAction = "SilentlyContinue" } Write-Verbose -Message "$($MyInvocation.MyCommand): Resolving URI: [$Uri]." ForEach ($item in $iwrParams.GetEnumerator()) { Write-Verbose -Message "$($MyInvocation.MyCommand): Invoke-RestMethod parameter: [$($item.name): $($item.value)]." } If (Test-PSCore) { try { # If running PowerShell Core, request URL and catch the response Invoke-WebRequest @iwrParams } catch [System.Exception] { $redirectUrl = $_.Exception.Response.Headers.Location.AbsoluteUri Write-Verbose -Message "$($MyInvocation.MyCommand): Response: [$($_.Exception.Response.StatusCode) - $($_.Exception.Response.ReasonPhrase)]." } } Else { try { # If running Windows PowerShell, request the URL and return the response $response = Invoke-WebRequest @iwrParams $redirectUrl = $response.Headers.Location Write-Verbose -Message "$($MyInvocation.MyCommand): Response: [$($response.StatusCode) - $($response.StatusDescription)]." } catch [System.Exception] { Write-Warning -Message "$($MyInvocation.MyCommand): Error at URI: $Uri." Write-Warning -Message "$($MyInvocation.MyCommand): Response: [$($_.Exception.Response.StatusCode) - $($_.Exception.Response.ReasonPhrase)]." Write-Warning -Message "$($MyInvocation.MyCommand): For troubleshooting steps see: $($script:resourceStrings.Uri.Info)." #Throw "$($MyInvocation.MyCommand): $($_.Exception.Message)." } } # Validate and return the resolved URL to the pipeline If ($Null -ne $redirectUrl) { If ($redirectUrl.GetType() -eq [System.String]) { Write-Output -InputObject $redirectUrl } Else { Write-Warning -Message "$($MyInvocation.MyCommand): failed to resolve correct output type (String)." } } Else { Write-Warning -Message "$($MyInvocation.MyCommand): failed to resolve a redirect at: $Uri." } } |