(Xojo Plugin) Compress String Feed to Base64

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64.

The purpose is to demonstrate the BeginCompressStringENC, MoreCompressStringENC, and EndCompressStringENC methods.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim success As Boolean
Dim sbCompressedBase64 As New Chilkat.StringBuilder

Dim compress As New Chilkat.Compression
compress.Algorithm = "deflate"
compress.Charset = "utf-8"
compress.EncodingMode = "base64"

Dim sbIndex As New Chilkat.StringBuilder

Dim i As Int32
For i = 0 To 24
    // 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 
    success = sbIndex.AppendInt(i)
    If (i = 0) Then
        success = sbCompressedBase64.Append(compress.BeginCompressStringENC(sbIndex.GetAsString()))
    Else
        success = sbCompressedBase64.Append(compress.MoreCompressStringENC(sbIndex.GetAsString()))
    End If

    success = sbCompressedBase64.Append(compress.MoreCompressStringENC(": This is a line of data to be compressed..." + EndOfLine.Windows))
Next

// Flush any remaining output.
success = sbCompressedBase64.Append(compress.EndCompressStringENC())

System.DebugLog("The base64 encoded compressed text:")
System.DebugLog(sbCompressedBase64.GetAsString())

// Now decompress in one call:
Dim originalText As String
originalText = compress.DecompressStringENC(sbCompressedBase64.GetAsString())
System.DebugLog(originalText)