Can JavaScript Compress JSON Data Client-Side for Servers with Fixed-Size Caches?

JavaScript Implementation of Gzip

Question:

Is there a way to compress JSON data on the client side before sending it to a server with a fixed-size cache?

Answer:

Edit: For better results, use the improved LZW solution found at http://pieroxy.net/blog/pages/lz-string/index.html.

Original Solution:

While JavaScript does not provide an implementation of Gzip, the jsolait library offers functions for LZW compression and decompression. Here is the code:

LZW Compression Function:

function lzw_encode(s) {
    var dict = {};
    var data = (s + "").split("");
    var out = [];
    var currChar;
    var phrase = data[0];
    var code = 256;
    for (var i = 1; i  1 ? dict[phrase] : phrase.charCodeAt(0));
            dict[phrase + currChar] = code;
            code++;
            phrase = currChar;
        }
    }
    out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
    for (var i = 0; i <p><strong>LZW Decompression Function:</strong></p><pre class="brush:php;toolbar:false">function lzw_decode(s) {
    var dict = {};
    var data = (s + "").split("");
    var currChar = data[0];
    var oldPhrase = currChar;
    var out = [currChar];
    var code = 256;
    var phrase;
    for (var i = 1; i 

The above is the detailed content of Can JavaScript Compress JSON Data Client-Side for Servers with Fixed-Size Caches?. For more information, please follow other related articles on the PHP Chinese website!