Hi, I want to make a Web App running on Google App Engine that will have a html form where user can upload their file and then my app access this file, edit it and again provide for download to user. By "Edit" I means say if user uploads "Main.class" then my app edit it to "superMain.class". Or say if they upload any text file then it edit its content..etc.
The environment for making web app in GAE is ready in eclipse now please tell me further steps to proceed.