Zlib Compression / Decompression

compress.coffee

zlib = require "zlib"

exports.deflate = (str = "", callback) ->
  buffer = new Buffer str, "utf8"
  zlib.deflate buffer, (err, str) ->
    str = str.toString "binary" if str?
    callback?(err, str)

exports.inflate = (str = "", callback) ->
  buffer = new Buffer str, "binary"
  zlib.inflate buffer, (err, str) ->
    str = str.toString "utf8" if str?
    callback?(err, str)

compress.js

var zlib = require("zlib");

exports.deflate = function(str, callback) {
  if (str == null) {
    str = "";
  }
  
  var buffer = new Buffer(str, "utf8");
  
  zlib.deflate(buffer, function(err, str) {
    if (str != null) {
      str = str.toString("binary");
    }
    
    if (typeof callback === "function") {
      callback(err, str);
    }
  });
};

exports.inflate = function(str, callback) {
  if (str == null) {
    str = "";
  }
  
  var buffer = new Buffer(str, "binary");
  
  zlib.inflate(buffer, function(err, str) {
    if (str != null) {
      str = str.toString("utf8");
    }
    
    if (typeof callback === "function") {
      callback(err, str);
    }
  });
};

deflate.coffee

{deflate} = require "./compress"

str = "<p></p><p></p><br /><br /><img src='test.img' alt='' />"

deflate str, (err, deflated) ->
  console.log deflated
  console.log "================================"
  console.log "original: #{str.length}"
  console.log "compressed: #{deflated.length}"

inflate.coffee

{deflate, inflate} = require "./compress"

str = "<p></p><p></p><br /><br /><img src='test.img' alt='' />"

deflate str, (err, deflated) ->
  inflate deflated, (err, infalted) ->
    console.log inflated
    console.log "================================"
    console.log "original: #{str.length}"
    console.log "compressed: #{deflated.length}"