ZLIB Decompression - Client Side

Question

I am receiving data as an \"ZLIB\" compressed inputstream.

Using Javascript/Ajax/JQuery, I need to uncompress it on the client side.

Is the

Answer 1

The js-deflate project by dankogai may be what you are looking for. I haven't actually tried it, but the rawinflate.js code seems fairly minimal, and should be able to decompress DEFLATE/zlib:ed data.

Answer 2

Our library JSXGraph contains the deflate, unzip and gunzip algorithm. Please, have a look at jsxcompressor (a spin-off from JSXGraph, see http://jsxgraph.uni-bayreuth.de/wp/download/) or at Utils.js in the source code.

Answer 3

Try pako https://github.com/nodeca/pako , it's not just inflate/deflate, but exact zlib port to javascript, with almost all features and options supported. Also, it's the fastest implementation in modern browsers.

Answer 4

Browserify-zlib works perfectly for me, it uses pako and has the exact same api as zlib. After I struggled for days with compressing/decompressing zlib encoded payloads in client side with pako, I can say that browserify-zlib is really convenient.

Answer 5

A more recent offering is https://github.com/imaya/zlib.js

I think it's much better than the alternatives.

Answer 6

you should see zlib rfc from:zlib rfc

the javascript inflate code I tested:inflate in Javascript the java code I wrote:

    static public byte[] compress(byte[] input) {
    Deflater deflater = new Deflater();
    deflater.setInput(input, 0, input.length);
    deflater.finish();
    byte[] buff = new byte[input.length + 50];
    deflater.deflate(buff);

    int compressedSize = deflater.getTotalOut();

    if (deflater.getTotalIn() != input.length)
        return null;

    byte[] output = new byte[compressedSize - 6];

    System.arraycopy(buff, 2, output, 0, compressedSize - 6);// del head and
                                                                // foot byte
    return output;
}

The very Important thing is in deflate in Java you must cut the head 2 byte,foot 4 byte,to get the raw deflate.