Chapter 5: Reading from the socket.
It's a good start, we have a server that can accept connections. It will write a message to the client.
But we aren't reading anything from the client. This will all change now.
Most network bindings will have a recv method. This method allows you to receive some bytes from the client.
There might be higher level abstractions like recv_line or recv_all or something like that but we are gonna focus
on the simplest version recv. The basic version of recv takes a number, and tries to read that many bytes from the
connected client. It will read as many as it can then return what it read.
Given our code from previous chapters.
var client = socket.accept();
client.send("Welcome!\n");
var reply = client.recv(4096);
client.send("You said: \n");
client.send(reply);
client.close();
Note that you can also test your server with netcat, use netcat as a client and whatever you write in the terminal will be sent to the server.
Goals
- Read a message from the client.
- Write that message back to the client.
Bonus goals
- Find a method that allows you to read lines OR parse the bytes into lines yourself.
- Accept multiple lines.