This is a copy of the Protohackers challenges as demonstrated by Andrea Leopardi on their YouTube channel.
Run the TCP servers with mix run --no-halt
To test a server, you can make a call using netcat, for example echo foo | nc localhost 5001
This is implemented in the file echo_server.ex.
Notes from the video:
- It's recommended to always use a struct to hold GenServer state.
- A listen socket waits for a TCP connection. Upon accepting a connection, it creates a peer socket which represents the 1:1 connection between the server and client.
- A listen socket can accept many connections, but a peer socket is always 1:1.
- Ensure you set a limit on the client data received to prevent a client from steaming an unlimited amount of data and causing the BEAM to run out of memory.