Filee

Filee is a high-performance, cross-platform, and open-source Local Area Network (LAN) file sharing tool licensed under the GPLv3 license.

Demo

YouTube: https://youtu.be/iwnmr1nOero

The Design and Implementation

Broadcast Module

The broadcast module is served as notifying others of the devices’ presence on the network so that the users don’t have to enter the IP address.

• The Broadcaster sends UDP broadcast messages on port 6816.
• The BroadcastReceiver listens to messages on the UDP port 6816.
• The Broadcaster will notify the OnlineDeviceModel in the models module to update the list accordingly.

Transfer Module

The transfer module is responsible for transferring files between devices.

• The FileSender sends files.
• FileSender is encapsulated by FileSenderSession to address issues like errors that would occur in a mobile environment.
• The FileReceiver receives files.
• The FileReceiver is created by FileReceiveServer’s master socket upon new connections.
• Both the FileSender and FileReceiver are inherited from FileTransferPeer.
• The FileTransferPeer contains the standards of the file transfer protocol
  • The definition of the header
  • The structure of TCP packet’s payload
  • Provides a unified interface for the sender and receiver to send and receive packets

Model Nodule

The model module contains model codes used in Qt’s Model-View system.

Utils Module

The utils module contains utility functions used throughout the application.

• The AndroidUtils class contains functions specific to Android.
  • Parse the correct file name
  • Reading the file extension from the file signature (binary)

Others

• The GuiController handles the interaction between the frontend and the backend.