Go

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. Go

    success := false

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

    bdCompressed := chilkat.NewBinData()

    compress := chilkat.NewCompression()
    compress.SetAlgorithm("deflate")
    compress.SetCharset("utf-8")

    sbUncompressedChunk := chilkat.NewStringBuilder()

    compress.SetFirstChunk(true)
    compress.SetLastChunk(false)

    var i int
    for i = 0; i <= 24; i++ {
        if i == 24 {
            compress.SetLastChunk(true)
        }

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

        compress.CompressSb(sbUncompressedChunk,bdCompressed)

        compress.SetFirstChunk(false)
    }

    // Show the compressed data in hex format:
    fmt.Println("The hex encoded compressed text:")
    fmt.Println(*bdCompressed.GetEncoded("hex"))

    // Now decompress in one call.  It is important to set both FirstChunk and LastChunk = true
    bdDecompressed := chilkat.NewBinData()
    compress.SetFirstChunk(true)
    compress.SetLastChunk(true)
    success = compress.DecompressBd2(bdCompressed,bdDecompressed)
    if success == false {
        fmt.Println(compress.LastErrorText())
        bdCompressed.DisposeBinData()
        compress.DisposeCompression()
        sbUncompressedChunk.DisposeStringBuilder()
        bdDecompressed.DisposeBinData()
        return
    }

    originalText := bdDecompressed.GetString("utf-8")
    fmt.Println(*originalText)

    bdCompressed.DisposeBinData()
    compress.DisposeCompression()
    sbUncompressedChunk.DisposeStringBuilder()
    bdDecompressed.DisposeBinData()