This was developed as part of a 5 part series on how to develop web apps. See the following:

• Part 1: http://0xdabbad00.com/2013/09/02/file-scanner-web-app-part-1-of-5-stand-up-and-webserver/
• Part 2: http://0xdabbad00.com/2013/09/02/file-scanner-web-app-part-2-of-5-upload-files/
• Part 3: http://0xdabbad00.com/2013/09/02/file-scanner-web-app-part-3-of-5-yara-signatures/
• Part 4: http://0xdabbad00.com/2013/09/02/file-scanner-web-app-part-4-of-5-scanning-files-from-the-web-app/
• Part 5: http://0xdabbad00.com/2013/09/02/file-scanner-web-app-part-5-of-5-finishing-touches/