orbit-basic/app/controllers/desktop_apps_controller.rb

class DesktopAppsController < OrbitBackendController
	require "net/http"
	require "uri"
  	require 'zip/zip'

	def index
		@desktopapps = DesktopApp.all
		render :layout => false
	end

	def upload
		if !params[:desktop_app].nil?
			temp_file = Tempfile.new("temp_file");
			original_file = params[:desktop_app][:package_file]
			temp_file.write(original_file.read.force_encoding("UTF-8"))
			temp_file.rewind
			filename = File.basename(original_file.original_filename,".zip")
			unzip_app(temp_file,filename)
			temp_file.close
		end
		render :layout => false
	end

	def unzip_app(file, zip_name)
	    Zip::ZipFile.open(file) { |zip_file|
	      da = DesktopApp.new.from_json(zip_file.read("#{zip_name}/settings.json"))
	      Dir.mktmpdir('f_path') { |dir|
	        images_entries = []
	        zip_file.entries.each do |entry|
	          case (path = entry.to_s)
	            when /\A(#{zip_name})\/(images)\/.*((\.jpg)|(\.png)|(\.gif))\z/   #for img
	              images_entries << entry
	          end
	        end
	        
	        images_entries.each do |image|
	        	da.images.build(:file => get_temp_file(zip_file,dir,image))
	        end	        
	   		}
	      da.save
	    }
  end

   def get_temp_file(zip_file, dir, entry)
    filename = File.basename(entry.to_s)
    temp_file = File.new(dir + '/' + filename, 'w+') 
    temp_file.write (zip_file.read entry ).force_encoding('UTF-8')
    temp_file
  end

end