(CkPython) 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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import chilkat

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

compressedData = chilkat.CkBinData()
compressedBytes = chilkat.CkByteData()

compress = chilkat.CkCompression()
compress.put_Algorithm("deflate")
compress.put_Charset("utf-8")

sbIndex = chilkat.CkStringBuilder()

for i in range(0,25):
    # 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 == 0):
        success = compress.BeginCompressString(sbIndex.getAsString(),compressedBytes)
    else:
        success = compress.MoreCompressString(sbIndex.getAsString(),compressedBytes)

    compressedData.AppendBinary(compressedBytes)
    success = compress.MoreCompressString(": This is a line of data to be compressed...\r\n",compressedBytes)
    compressedData.AppendBinary(compressedBytes)

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

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

# Now decompress in one call:
success = compressedData.GetBinary(compressedBytes)
originalText = compress.decompressString(compressedBytes)
print(originalText)