Simple PowerShell script to extract and test URLs in text files.

Test-ContentLinks.ps1

#Requires -Version 7.2

[CmdletBinding(DefaultParameterSetName = 'Path')]
param (
    [Parameter(Mandatory, Position = 0, ParameterSetName = 'Path', ValueFromPipeline, ValueFromPipelineByPropertyName)]
    [string[]] $Path,

    [Parameter(Mandatory, ParameterSetName = 'LiteralPath', ValueFromPipelineByPropertyName)]
    [string[]] $LiteralPath,

    [Parameter()]
    [ValidateCount(2, 3)]
    [string[]] $Replace
)

begin {
    $typeData = @{
        TypeName = 'ContentLinks.LinkResult'
        DefaultDisplayProperty = 'URI'
        DefaultDisplayPropertySet = 'IsValid', 'StatusCode', 'URI'
        DefaultKeyPropertySet = 'URI'
    }
    Update-TypeData @typeData -Force

    $uris = @()
}

process {
    $replaceArgs = $Replace
    [void] $PSBoundParameters.Remove('Replace')

    $m = Select-String @PSBoundParameters -Pattern 'https?://[\w\.:\/%~_\-\+]+' -NoEmphasis
    if (!$m) {
        return
    }

    $m = $m | Select-Object @{l = 'URI'; e = { $_.Matches.Value } }, Path
    $uris += if ($replaceArgs) {
        $m | ForEach-Object {
            [PSCustomObject]@{
                URI  = $_.URI -replace $replaceArgs
                Path = $_.Path
            }
        }
    }
    else {
        $m
    }
}

end {
    $uris | Group-Object -Property 'URI' | ForEach-Object -Parallel {
        $uri = $_.Name
        $paths = $_.Group.Path

        Write-Verbose "Checking $uri" -Verbose
        try {
            $resp = Invoke-WebRequest $uri -SkipHttpErrorCheck -UseDefaultCredentials
            [PSCustomObject]@{
                PSTypeName        = 'ContentLinks.LinkResult'
                IsValid           = $resp.StatusCode -ge 200 -and $resp.StatusCode -lt 300
                URI               = $uri
                Path              = $paths
                StatusCode        = $resp.StatusCode
                StatusDescription = $resp.StatusDescription
            }
        }
        catch {
            [PSCustomObject]@{
                PSTypeName        = 'ContentLinks.LinkResult'
                IsValid           = $false
                URI               = $uri
                Path              = $paths
                StatusCode        = $null
                StatusDescription = $_.Exception.Message
            }
        }
    }
}