(CkPython) Compress Text Feed to Binary

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

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux

import sys
import chilkat

success = False

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

bdCompressed = chilkat.CkBinData()

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

sbUncompressedChunk = chilkat.CkStringBuilder()

compress.put_FirstChunk(True)
compress.put_LastChunk(False)

for i in range(0,25):
    if (i == 24):
        compress.put_LastChunk(True)

    sbUncompressedChunk.Clear()
    sbUncompressedChunk.AppendInt(i)
    sbUncompressedChunk.Append(": This is a line of data to be compressed...\r\n")

    compress.CompressSb(sbUncompressedChunk,bdCompressed)

    compress.put_FirstChunk(False)

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

# Now decompress in one call.  It is important to set both FirstChunk and LastChunk = True
bdDecompressed = chilkat.CkBinData()
compress.put_FirstChunk(True)
compress.put_LastChunk(True)
success = compress.DecompressBd2(bdCompressed,bdDecompressed)
if (success == False):
    print(compress.lastErrorText())
    sys.exit()

originalText = bdDecompressed.getString("utf-8")
print(originalText)