Chilkat2-Python

Compress Text Feed to Binary

See more Compression Examples

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed binary data. Chilkat2-Python

import sys
import chilkat2

success = False

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

bdCompressed = chilkat2.BinData()

compress = chilkat2.Compression()
compress.Algorithm = "deflate"
compress.Charset = "utf-8"

sbUncompressedChunk = chilkat2.StringBuilder()

compress.FirstChunk = True
compress.LastChunk = False

for i in range(0,25):
    if (i == 24):
        compress.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.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 = chilkat2.BinData()
compress.FirstChunk = True
compress.LastChunk = True
success = compress.DecompressBd2(bdCompressed,bdDecompressed)
if (success == False):
    print(compress.LastErrorText)
    sys.exit()

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