[TIMOB-17502] iOS: URLSession Module returns blob instead of file location - causing low memory crash

   // Require in the urlSession module
   var urlSession = require("com.appcelerator.urlSession");
   var session;
    
   // App UI
   var win = Ti.UI.createWindow({backgroundColor:"white"});
   var progress = Ti.UI.createProgressBar({
       width: 200,
       height: 50,
       min: 0,
       max: 1,
       value: 0,
       style: Ti.UI.iPhone.ProgressBarStyle.PLAIN,
       top: 10,
       message: 'Downloading image URL',
       font: { fontSize: 12, fontWeight: 'bold'},
       color: '#888'
   });
   win.add(progress);
   var imageView = Ti.UI.createImageView({
           top:150,
             height:300,
             width:200
       });
   win.add(imageView);
    
   var button = Ti.UI.createButton({
       title:'Download Image (url)',
       height:40,
       width:200,
       top:70
   });
    
   button.addEventListener('click', function()
   {
       // Check if the device is running iOS 8 or later, before registering for local notifications
       if (Ti.Platform.name == "iPhone OS" && parseInt(Ti.Platform.version.split(".")[0]) >= 8) {
           Ti.App.iOS.registerUserNotificationSettings({
              types: [
                   Ti.App.iOS.USER_NOTIFICATION_TYPE_ALERT,
                   Ti.App.iOS.USER_NOTIFICATION_TYPE_SOUND,
                   Ti.App.iOS.USER_NOTIFICATION_TYPE_BADGE
               ]
           });
       }
       // Create a session configuration
       // The string parameter is an arbitrary string used to identify the session in events
       var sessionConfig = urlSession.createURLSessionBackgroundConfiguration("com.appcelerator.test");
       // Create a session
       session = urlSession.createURLSession(sessionConfig);
       // Create a background download task to get the asset with the URL
       //urlSession.backgroundDownloadTaskWithURL(session,"https://raw.github.com/appcelerator-developer-relations/KitchenSink/master/Resources/images/dog@2x~iphone.jpg"); //small file
       //urlSession.backgroundDownloadTaskWithURL(session,"http://imgsrc.hubblesite.org/hu/db/images/hs-2004-07-a-full_jpg.jpg"); //medium sized file
       urlSession.backgroundDownloadTaskWithURL(session,"http://www.wswd.net/testdownloadfiles/1GB.zip"); //huge file
       progress.show();
   });
    
   win.add(button);
   win.open();
    
   // Monitor this event to receive updates on the progress of the download
   Ti.App.iOS.addEventListener("downloadprogress", function(e) {
       // Update the progress indicator
       progress.value = (e.totalBytesWritten/e.totalBytesExpectedToWrite);
   });
    
    
   // Monitor this event to know when the download completes
   Ti.App.iOS.addEventListener("downloadcompleted", function(e) {
       Ti.API.info("download completed " + JSON.stringify(e));
       var cacheFile = e.data.getFile();
       var downloadedFile = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, cacheFile.getName());
       downloadedFile.write(e.data); // copy and save from cache
       Ti.API.info("downloadedFile: " + downloadedFile.getNativePath());
       // set new Image
       //imageView.image = e.data;
       // Invalidate the session and cancel current session tasks
       urlSession.invalidateAndCancel(session);
    
       // Notify the user the download is complete if the application is in the background
       var notification = Ti.App.iOS.scheduleLocalNotification({
           alertBody: "Download completed!",
           badge: 1,
           sound: "/alert.wav",
           date: new Date(new Date().getTime())
       });
   
       progress.hide();
   });
    
    
   // Monitor this event to know when all session tasks have completed
   Ti.App.iOS.addEventListener('sessioncompleted', function(e) {
       Ti.API.info("sessioncompleted " + JSON.stringify(e));
       if (e.success) {
           alert("Downloads completed successfully.");
       }
   });
   

    [WARN] :   ing: Application delegate received call to -application:handleEventsForBackgroundURLSession:completionHandler: but the completion handler was never called.
    [WARN] :   assertion failed: 12H143: libxpc.dylib + 51923 [7FF71721-5624-3DDE-9615-146A4D8B7197]: 0x7d