how to unzip the files using base64 encoding in actionscript? - actionscript-3

Question

I have a issue here with unzipping the .zip files that i have in combobox.i select 1 .zip file and after selecting the particular .zip file Button should unzip it and put the contents in another combobox.Can someone help me here?
here is a code:
// ActionScript file
import flash.display.*;
import flash.events.*;
import flash.utils.ByteArray;
import com.Base64;
import mx.controls.Alert;
[Bindable] private var sfile:FileReference;
[Bindable] private var zipdataProvdr:ArrayCollection = new ArrayCollection([{label: "test", file: "test"},{label: "elm34001", file: "elm34001"}, {label: "elm34003", file: "elm34003"}, {label: "elm34005", file: "elm34005"}, {label: "elm34009", file: "elm34009"},{label: "elm34011", file: "elm34011"}, {label: "elm34013", file: "elm34013"}]);
//private var zip:FZip;
//private var flag:Boolean;
private function init(event:Event):void
{
var file:ByteArray = new ByteArray();
file = "test.zip";
var encode:String = Base64.encodeByteArray(file);
Alert.show("Encoded file is " + encode);
for (var i:int = 0; i < zipdataProvdr.length; i++)
{
file = zipdataProvdr[i];
Alert.show("file is " + file);
}
//var encoded:String = Base64.encodeByteArray(file);
//Alert.show("encoded file is " + encoded.toString());
}

Answer 1

I used Nochump lib to unzip the files. Following is the code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()" layout="absolute">
<mx:Script>
<![CDATA[
import flash.net.URLStream;
import flash.net.URLRequest;
import mx.controls.Alert;
import mx.collections.ArrayCollection;
import flash.events.Event;
import flash.events.ErrorEvent;
import flash.events.ProgressEvent;
import nochump.util.zip.ZipFile;
[Bindable] private var _files:Array = ["/MyMapFolder/elm34001.zip", "/MyMapFolder/elm34003.zip", "/MyMapFolder/elm34005.zip", "/MyMapFolder/elm34009.zip", "/MyMapFolder/elm34011.zip", "/MyMapFolder/elm34013.zip"];
private var zpfls:ZipFile;
[Bindable] private var arr:Array;
private var arrcoll:ArrayCollection;
private function loadZipFile():void {
currentState = "loading";
var urlStream:URLStream = new URLStream();
loadProgress.source = urlStream;
urlStream.addEventListener(Event.COMPLETE,completeHandler);
urlStream.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
//urlStream.addEventListener(SecurityErrorEvent.SECURITY_ERROR, errorHandler);
urlStream.load(new URLRequest(String(cbFiles.selectedItem)));
//Alert.show("Testing........" + urlStream.endian);
//Alert.show("Testing........" + urlStream.objectEncoding);
//Alert.show("Testing........" + urlStream);
}
private function completeHandler(event:Event):void
{
var data:URLStream = URLStream(event.target);
arr = new Array();
//Alert.show("***Length of file is " + data.bytesAvailable);
zpfls = new ZipFile(data);
arr = new Array(zpfls.entries[1]);
Alert.show("Show only Shape File: " + arr);
}
private function errorHandler(event:ErrorEvent):void {
currentState = "error";
errorLabel.text = event.text;
}
]]>
</mx:Script>
<mx:states>
<mx:State name="loading">
<mx:AddChild relativeTo="{this}" position="lastChild">
<mx:ProgressBar id="loadProgress" width="100%" />
</mx:AddChild>
</mx:State>
<mx:State name="error">
<mx:AddChild relativeTo="{this}" position="lastChild">
<mx:Label id="errorLabel" />
</mx:AddChild>
</mx:State>
</mx:states>
<mx:Label text="Select a zip file and click "Load"." x="67" y="10"/>
<mx:ComboBox id="cbFiles" dataProvider="{_files}" width="300" x="10" y="36"/>
<mx:Button label="Load" click="loadZipFile()" x="333" y="36"/>
<mx:ComboBox x="394" y="36" id="cbobxs" dataProvider="{arr}" width="169"> </mx:ComboBox>
</mx:Application>

Answer 2

I'm not sure you can. No need to reinvent the wheel though, try using a zip library like this one instead: http://nochump.com/blog/archives/15