1 | import io |
2 | import net |
3 | |
4 | // This file shows how a basic TCP echo server can be implemented using |
5 | // the net module. You can connect to the server by using netcat or telnet, |
6 | // in separate shells, for example: |
7 | // nc 127.0.0.1 12345 |
8 | // or |
9 | // telnet 127.0.0.1 12345 |
10 | |
11 | fn main() { |
12 | mut server := net.listen_tcp(.ip6, ':12345')! |
13 | laddr := server.addr()! |
14 | eprintln('Listen on ${laddr} ...') |
15 | for { |
16 | mut socket := server.accept()! |
17 | spawn handle_client(mut socket) |
18 | } |
19 | } |
20 | |
21 | fn handle_client(mut socket net.TcpConn) { |
22 | defer { |
23 | socket.close() or { panic(err) } |
24 | } |
25 | client_addr := socket.peer_addr() or { return } |
26 | eprintln('> new client: ${client_addr}') |
27 | mut reader := io.new_buffered_reader(reader: socket) |
28 | defer { |
29 | unsafe { |
30 | reader.free() |
31 | } |
32 | } |
33 | socket.write_string('server: hello\n') or { return } |
34 | for { |
35 | received_line := reader.read_line() or { return } |
36 | if received_line == '' { |
37 | return |
38 | } |
39 | println('client ${client_addr}: ${received_line}') |
40 | socket.write_string('server: ${received_line}\n') or { return } |
41 | } |
42 | } |