(Lianja) 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.

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

loCompressedData = createobject("CkBinData")

loCompress = createobject("CkCompression")
loCompress.Algorithm = "deflate"
loCompress.Charset = "utf-8"

loSbIndex = createobject("CkStringBuilder")

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.
    loSbIndex.Clear()
    loSbIndex.AppendInt(i)
    if (i = 0) then
        loCompressedBytes = loCompress.BeginCompressString(loSbIndex.GetAsString())
    else
        loCompressedBytes = loCompress.MoreCompressString(loSbIndex.GetAsString())
    endif

    loCompressedData.AppendBinary(loCompressedBytes)
    loCompressedBytes = loCompress.MoreCompressString(": This is a line of data to be compressed..." + Chr(13) + Chr(10))
    loCompressedData.AppendBinary(loCompressedBytes)
next

// Flush any remaining output.
loCompressedBytes = loCompress.EndCompressString()
loCompressedData.AppendBinary(loCompressedBytes)

// Show the compressed data in hex format:
? "The hex encoded compressed text:"
? loCompressedData.GetEncoded("hex")

// Now decompress in one call:
loCompressedBytes = loCompressedData.GetBinary()
lcOriginalText = loCompress.DecompressString(loCompressedBytes)
? lcOriginalText


release loCompressedData
release loCompress
release loSbIndex