recursive double download example

recursiveDownload.js

var button1 = Ti.UI.createButton({
    top:"10%",
    title: "Get Files"
});
$.index.add(button1);
 
button1.addEventListener('click', getfiles);

function getfiles(){
	Ti.API.info('get files was pushed');

	var url_home ="http:"; 
	var xhr = Titanium.Network.createHTTPClient();
	xhr.onload = function() {
		var data1 = JSON.parse(this.responseText);
		Ti.API.info('json count = ' + data1.length);
		var image_url = "http://";

		// start recursion with index 0
		recursiveDownload(0);

		function recursiveDownload(x) {
			if (x < data1.lenght) {
				Ti.API.info('x= ' + x);
				var ht = data1[x].jth;
				var hti = data1[x].jthi;
				var ot = data1[x].jto;
				var oti = data1[x].jtoi;

				Ti.API.info ('data stream start');
				Ti.API.info('x = ' + x );
				Ti.API.info('ht = ' + ht);
				Ti.API.info('hti = ' + hti);
				Ti.API.info('ot = ' + ot);
				Ti.API.info('oti = ' + oti);
				
				// start with the download of hti
				var htic = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory, hti);
				if (htic.exists()) {
					Ti.API.info(hti + ' exists on the phone');
					// process otic
					getOtic()
				} else {
					// dwonload and save htic
					Ti.API.info(hti+ ' does not exists on phone');
					var getimage = Titanium.Network.createHTTPClient();
					getimage.setTimeout(10000);
					getimage.onload = function() {
						htic.write(this.responseData);
						Ti.API.info('file hit '+hti+' saved')
						// process otic
						getOtic();
					};
					getimage.onerror = function(e) {
						Ti.API.debug(hti, "Error: " + e);
						getOtic();
					};
					getimage.open("GET", image_url+hti);
					getimage.send();
				}

				function getOtic() {
					Ti.API.info('oti check loop');
					var otic = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory, oti);
					if (otic.exists()) {    
						Ti.API.info(oti + ' exists on phone');
						Ti.API.info('check1');
						// increment index and call recursion
						recursiveDownload(x++);
					} else {
						Ti.API.info(oti + ' does not exist on phone line 65');
						var getimage1 = Titanium.Network.createHTTPClient();
						getimage1.setTimeout(10000);
						getimage1.onload = function() {
							otic.write(this.responseData);
							Ti.API.info('file oti  '+oti+' saved');
							// increment index and call recursion
							recursiveDownload(x++)
						};
						getimage1.onerror = function(e) {
							Ti.API.debug(oti, "Error: " + e);
							recursiveDownload(x++);
						};
						getimage1.open("GET", image_url+oti);
						getimage1.send();
					}
				}
				
			} else {
				// data1 has been processed ...
			};
			
		};
	}
	xhr.open("GET", url_home);
	xhr.send();
};

$.index.open();