Get an external JSON file, write it the file system, and convert it to an MD5 hash

fileToMD5.js

var win = Ti.UI.createWindow();

// here the reponse will be written
var texArea = Ti.UI.createTextArea({value:'',top:20,right:20,left:20,bottom:20,backgroundColor:'white', font:{fontSize:20}});

win.add(texArea);

win.open();


var xhr = Ti.Network.createHTTPClient();
xhr.onload = function(){
	try{
		var json = JSON.parse(this.responseText);
		// show the json in the textArea
		texArea.value = json;
		
		// write it to the file system
		var file1 = Titanium.Filesystem.getFile(
			Titanium.Filesystem.applicationDataDirectory, 'json.json'
		);
		file1.write(json);
		
		// show it as MD5 (after 2 seconds, just for fun)
		setTimeout(function(){
			var file2 = Titanium.Filesystem.getFile(
				Titanium.Filesystem.applicationDataDirectory, 'json.json'
			);
			texArea.value = Ti.Utils.md5HexDigest(file2.toBlob());
		},2000);

	}catch(e){
		Ti.API.info(e);
	}
};
xhr.onerror = function(e){
	alert(e);
};

// get my test json
xhr.open('GET', 'https://s3.amazonaws.com/pedruqui/tests/hotels.json');
xhr.send();