Example: Socket listener, async
Note: Use telnet localhost 1024 or telnet localhost 1025 to create connections
Note: Send "shutdown" to close the server.
public class Server : Object {
private Cancellable cancellable;
private class Source : Object {
public uint16 port { private set; get; }
public Source (uint16 port) {
this.port = port;
}
}
private async void worker_func (SocketConnection connection, Source source) {
try {
DataInputStream istream = new DataInputStream (connection.input_stream);
DataOutputStream ostream = new DataOutputStream (connection.output_stream);
// Get the received message:
string message = yield istream.read_line_async (Priority.DEFAULT, this.cancellable);
message._strip ();
print ("Received: %s\n", message);
// Response:
ostream.put_string (message, this.cancellable);
ostream.put_byte ('\n', this.cancellable);
if (message == "shutdown") {
this.cancellable.cancel ();
}
} catch (Error e) {
print ("Error: %s\n", e.message);
}
}
public async void listen (Cancellable cancellable) {
this.cancellable = cancellable;
try {
// Listen on port 1024 and 1025.
// Source is used as source-identifier.
SocketListener listener = new SocketListener ();
listener.add_inet_port (1024, new Source (1024));
listener.add_inet_port (1025, new Source (1025));
// Wait for connections:
while (true) {
// Get the connection:
Object source_obj;
SocketConnection connection = yield listener.accept_async (this.cancellable, out source_obj);
// Identify the source:
Source source = source_obj as Source;
assert (source != null);
print ("Accepted! (Source: %d)\n", source.port);
// Register a worker:
worker_func.begin (connection, source);
}
} catch (Error e) {
print ("Error: %s\n", e.message);
}
}
public static int main (string[] args) {
MainLoop loop = new MainLoop ();
// Used to shutdown the program:
Cancellable cancellable = new Cancellable ();
cancellable.cancelled.connect (() => {
loop.quit ();
});
new Server ().listen.begin (cancellable);
loop.run ();
return 0;
}
} valac --pkg gio-2.0 GLib.SocketListener.accept_async.vala