110 lines
2.1 KiB
Go
110 lines
2.1 KiB
Go
package soju
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"time"
|
|
|
|
"gopkg.in/irc.v3"
|
|
)
|
|
|
|
func setKeepAlive(c net.Conn) error {
|
|
tcpConn, ok := c.(*net.TCPConn)
|
|
if !ok {
|
|
return fmt.Errorf("cannot enable keep-alive on a non-TCP connection")
|
|
}
|
|
if err := tcpConn.SetKeepAlive(true); err != nil {
|
|
return err
|
|
}
|
|
return tcpConn.SetKeepAlivePeriod(keepAlivePeriod)
|
|
}
|
|
|
|
type conn struct {
|
|
net net.Conn
|
|
irc *irc.Conn
|
|
srv *Server
|
|
logger Logger
|
|
outgoing chan<- *irc.Message
|
|
closed chan struct{}
|
|
}
|
|
|
|
func newConn(srv *Server, netConn net.Conn, logger Logger) *conn {
|
|
setKeepAlive(netConn)
|
|
|
|
outgoing := make(chan *irc.Message, 64)
|
|
c := &conn{
|
|
net: netConn,
|
|
irc: irc.NewConn(netConn),
|
|
srv: srv,
|
|
outgoing: outgoing,
|
|
logger: logger,
|
|
closed: make(chan struct{}),
|
|
}
|
|
|
|
go func() {
|
|
for msg := range outgoing {
|
|
if c.srv.Debug {
|
|
c.logger.Printf("sent: %v", msg)
|
|
}
|
|
c.net.SetWriteDeadline(time.Now().Add(writeTimeout))
|
|
if err := c.irc.WriteMessage(msg); err != nil {
|
|
c.logger.Printf("failed to write message: %v", err)
|
|
break
|
|
}
|
|
}
|
|
if err := c.net.Close(); err != nil {
|
|
c.logger.Printf("failed to close connection: %v", err)
|
|
} else {
|
|
c.logger.Printf("connection closed")
|
|
}
|
|
// Drain the outgoing channel to prevent SendMessage from blocking
|
|
for range outgoing {
|
|
// This space is intentionally left blank
|
|
}
|
|
}()
|
|
|
|
c.logger.Printf("new connection")
|
|
return c
|
|
}
|
|
|
|
func (c *conn) isClosed() bool {
|
|
select {
|
|
case <-c.closed:
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
// Close closes the connection. It is safe to call from any goroutine.
|
|
func (c *conn) Close() error {
|
|
if c.isClosed() {
|
|
return fmt.Errorf("connection already closed")
|
|
}
|
|
close(c.closed)
|
|
close(c.outgoing)
|
|
return nil
|
|
}
|
|
|
|
func (c *conn) ReadMessage() (*irc.Message, error) {
|
|
msg, err := c.irc.ReadMessage()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if c.srv.Debug {
|
|
c.logger.Printf("received: %v", msg)
|
|
}
|
|
|
|
return msg, nil
|
|
}
|
|
|
|
// SendMessage queues a new outgoing message. It is safe to call from any
|
|
// goroutine.
|
|
func (c *conn) SendMessage(msg *irc.Message) {
|
|
if c.isClosed() {
|
|
return
|
|
}
|
|
c.outgoing <- msg
|
|
}
|