(PowerShell) Compress Text Feed to Binary

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed binary data.

The purpose is to demonstrate the BeginCompressString, MoreCompressString, and EndCompressString methods.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$compressedData = New-Object Chilkat.BinData

$compress = New-Object Chilkat.Compression
$compress.Algorithm = "deflate"
$compress.Charset = "utf-8"

$sbIndex = New-Object Chilkat.StringBuilder

for ($i = 0; $i -le 24; $i++) {
    # Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return
    # an empty string (or 0 bytes).  When this happens, the input data is not lost.  It will be flushed
    # in a subsequent call.
    $sbIndex.Clear()
    $sbIndex.AppendInt($i)
    if ($i -eq 0) {
        $compressedBytes = $compress.BeginCompressString($sbIndex.GetAsString())
    }
    else {
        $compressedBytes = $compress.MoreCompressString($sbIndex.GetAsString())
    }

    $compressedData.AppendBinary($compressedBytes)
    $compressedBytes = $compress.MoreCompressString(": This is a line of data to be compressed...`r`n")
    $compressedData.AppendBinary($compressedBytes)
}

# Flush any remaining output.
$compressedBytes = $compress.EndCompressString()
$compressedData.AppendBinary($compressedBytes)

# Show the compressed data in hex format:
$("The hex encoded compressed text:")
$($compressedData.GetEncoded("hex"))

# Now decompress in one call:
$compressedBytes = $compressedData.GetBinary()
$originalText = $compress.DecompressString($compressedBytes)
$($originalText)