Private/Get-Link.ps1
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function Get-Link { <# .SYNOPSIS Returns a specific link from a web page. .DESCRIPTION Returns a specific link from a web page. .NOTES Site: https://packageology.com Author: Dan Gough Twitter: @packageologist .LINK https://github.com/DanGough/Nevergreen .PARAMETER Uri The URI to query. .PARAMETER MatchProperty Whether the RegEx pattern should be applied to the href, outerHTML, class, title or data-filename of the link. .PARAMETER Pattern The RegEx pattern to apply to the selected property. Supply an array of patterns to receive multiple links. .PARAMETER MatchProperty Optional. Specifies which property to return from the link. Defaults to href, but 'data-filename' can also be useful to retrieve. .EXAMPLE Get-Link -Uri 'http://somewhere.com' -MatchProperty href -Pattern '\.exe$' Description: Returns first download link matching *.exe from http://somewhere.com. #> [CmdletBinding(SupportsShouldProcess = $False)] param ( [Parameter( Mandatory = $true, Position = 0, ValueFromPipeline)] [ValidatePattern('^(http|https)://')] [Alias('Url')] [String] $Uri, [Parameter( Mandatory = $true, Position = 1)] [ValidateSet('href', 'outerHTML', 'innerHTML', 'outerText', 'innerText', 'class', 'title', 'tagName', 'data-filename')] [String] $MatchProperty, [Parameter( Mandatory = $true, Position = 2)] [ValidateNotNullOrEmpty()] [String[]] $Pattern, [Parameter( Mandatory = $false, Position = 3)] [ValidateNotNullOrEmpty()] [String] $ReturnProperty = 'href', [Switch] $PrefixDomain, [Switch] $PrefixParent ) $ProgressPreference = 'SilentlyContinue' $Response = Invoke-WebRequest -Uri $Uri -DisableKeepAlive -UseBasicParsing foreach ($CurrentPattern in $Pattern) { $Link = $Response.Links | Where-Object $MatchProperty -match $CurrentPattern | Select-Object -First 1 -ExpandProperty $ReturnProperty if ($PrefixDomain) { $BaseURL = ($Uri -split '/' | Select-Object -First 3) -join '/' $Link = Set-UriPrefix -Uri $Link -Prefix $BaseURL } elseif ($PrefixParent) { $BaseURL = ($Uri -split '/' | Select-Object -SkipLast 1) -join '/' $Link = Set-UriPrefix -Uri $Link -Prefix $BaseURL } $Link } } |