TNW

TNW is Not WeChat

An instant messaging app for 2018 Computer Networks Homework.

Author: tandf 2018.12.30

Usage

Windows

Run Executable/Windows/TNW.exe

Other platform

Run python3 TNW.py

Dependency

Python is needed.

Install necessary modules using pip.

pip3 install pyqt5 pip3 install sounddevice pip3 install soundfile pip3 install numpy

Protocol

• use json
• source
• target
• time stamp
• type
  • TEXT
  • FILE
  • RECORDING
• data
  • text packet: msg
  • file packet: file name
  • recording packet: recording name (generated using hash funciton)

If file or recording, get file after get packet.

Directory Structure

• login.py (log in/out, query)
• msg.py (send and receive message)
• TNW.py (ui and main function)
• data/
  • [ID]/
    • contact
    • [msg file, name generated using hash function)
    • files/ (files received)
    • recordings/ (recordings received)
  • recv (temp dir for receiving files and recordings)

Threads

• UI (main thread)
• receive msg
  • server thread, always loop
  • socket thread, threads to deal with incoming tcp link
• send msg (open thread at incoming connect)

To be improved

• Show the percentage when sending files.
• Show the time when recording.