Parse logs with Powershell

$path = “C:\IISLogs\”

$infile = “alllogs.txt”

$outfile = “parsed.txt”

$batch = 1000

[regex]$match_regex = ‘StringToFindInLogs’

[regex]$replace_regex = ‘BINGO’

$header_line = (Select-String -Path $path\$infile -Pattern $match_regex -list).line

[regex]$header_regex = [regex]::escape($header_line)

#$header_line.trim(‘|’) | Set-Content $path\$outfile

Get-Content $path\$infile -ReadCount $batch |

    ForEach {

             $_ -match $match_regex -NotMatch $header_regex -Replace $replace_regex ,’$1′ | Out-File $path\$outfile -Append

    }