Simple Share Python

Simple P2P file transfer in python with client-server architecture. The program uses TCP protocol to communicate, and the receiver should open a port,when participants aren't in the same network (default port is 32700).

Usage

Compatible with Python 3.x (tested with 3.10)

Install dependencies: pip install -r requirements.txt

This CLI program can operate in sender or receiver mode. Or just display information messages, like help, or version.

Usage when sending: ssp.py send -d IP -f FILE [-p PORT_NUMBER]
Usage when receiving: ssp.py receive [-p PORT_NUMBER] [--no-api]
Usage when getting information: ssp.py [--help] [--version]

Sending arguments:
  -d, -ip IP_ADDRESS		Required, the receiver's IP address
  -f FILE_LOCATION			Required, the file to be sent
  -p, -port PORT_NUMBER		Optional, default is 32700 (have to match with the receiver's

Receiving arguments:
  -p, -port PORT_NUMBER		Listening port, default is 32700 (you should open it)
  --no-api					Do not use ipify API to get the external IP address

Standalone arguments:
  -h, --help				Show this help message and exit
  -v, --version				Show informations about the program, and the version then exit

Tip: You can shorten receive command, because program only checks for send, and otherwise it will be in receiving mode, so you can type anything instead of receive. Example: ssp.py rec

Privacy notices

• The program do not use any encryption. If you wanted to send sensitive data, I suggest to use PGP.

• Program uses ipify API, and sends a GET request to the site to get your external IP. You can disable this function with --no-api switch.

• In receiving mode the program connects to Google (8.8.8.8) on port 80 (just for get the right adapter's address with internet access)

Known issues

• Progress bar issues (will be fixed in the future)
  • On bigger packet size (65535 bytes) progress bar can't work properly (appears a lot on receiver's side, when download is finished).
  • Error message writes it over, and not visible properly.

Nothing else yet, so feel free to test.

Future improvements

• Optimizing packet size
• Multiple file receiving, and sending without restart the program
• Encryption
• GUI
• Unit tests
• Optional DDOS protection (or password protection)
• Can be set who is the server (the sender or the receiver)