Node.js

Compress String Feed to Base64

See more Compression Examples

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var sbCompressedBase64 = new chilkat.StringBuilder();

    var compress = new chilkat.Compression();
    compress.Algorithm = "deflate";
    compress.Charset = "utf-8";
    compress.EncodingMode = "base64";

    compress.FirstChunk = true;
    compress.LastChunk = false;

    var bdCompressed = new chilkat.BinData();
    var sbUncompressedChunk = new chilkat.StringBuilder();

    var i;
    for (i = 0; i <= 24; i++) {
        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;
    }

    console.log("The base64 encoded compressed text:");
    console.log(bdCompressed.GetEncoded("base64"));

    // Decompress in one call:
    var originalText = compress.DecompressStringENC(bdCompressed.GetEncoded("base64"));
    console.log(originalText);

}

chilkatExample();