tails a log file and prints urls to console

monitor.ps1

#Requires -Version 2.0
param(
    [Parameter(Mandatory=$true)]
    [string]$logFile
)

# Convert relative path to absolute path
$logFile = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($logFile)

# URL regex pattern that matches http, https, ftp, and other common protocols
$urlPattern = '(https?|ftp|file|sftp|ws|wss):\/\/[-A-Za-z0-9+&@#\/%?=~_|!:,.;]*[-A-Za-z0-9+&@#\/%=~_|]'

# Verify the file exists
if (-not (Test-Path $logFile)) {
    Write-Error "File not found: $logFile"
    exit 1
}

# Create a StreamReader for continuous reading
try {
    $reader = New-Object System.IO.FileStream($logFile, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::ReadWrite)
    $streamReader = New-Object System.IO.StreamReader($reader)

    # Seek to the end of the file
    $reader.Seek(0, [System.IO.SeekOrigin]::End)

    Write-Host "Monitoring $logFile for URLs..."

    while ($true) {
        $line = $streamReader.ReadLine()
        if ($line -ne $null) {
            # Search for URLs in the line
            if ($line -match $urlPattern) {
                # Extract all matches and print them
                $matches = [regex]::Matches($line, $urlPattern)
                foreach ($match in $matches) {
                    Write-Host $match.Value
                }
            }
        } else {
            # No new lines, wait briefly before checking again
            Start-Sleep -Milliseconds 100
        }
    }
}
catch {
    Write-Error $_.Exception.Message
    exit 1
}
finally {
    if ($streamReader) { $streamReader.Dispose() }
    if ($reader) { $reader.Dispose() }
}