JFS is a simple, TCP/IP based network filesystem protocol. It allows applets running in a web browser to load and save files on a remote server, as well as send email and print running in a web browser to load and save files on a remote server, as well as send email and print documents through the JFS server.
Because Java applets cannot access the filesystem of the machine they are running on, this provides a useful way for applets to store state information.
The JFS clients, server and source code are free for non-commercial use, such as student projects and personal experimentation.
A JFS server is run on a unix system along with a web server. When a JFS-capable applet is downloaded from the web server, it establishes a connection with the JFS server and sends a username and password. From then on, the applet sends requests to the JFS server to do things like :
- Load, save and delete files
- Create directories
- Get information about users
- Change file permissions
- Send email
All the files accessed through the JFS server are stored on the server host in files and directories beneath the server’s root directory.
The server maintains a list of users and groups for the filesystem, and a set of permissions for each JFS file. These users and permissions are totally separate from the actual unix files and permissions on the server host.
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