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ergo/irc/socket.go
2014-04-15 12:10:02 -07:00

96 lines
1.5 KiB
Go

package irc
import (
"bufio"
"io"
"net"
)
const (
R = '→'
W = '←'
)
type Socket struct {
closed bool
conn net.Conn
scanner *bufio.Scanner
writer *bufio.Writer
}
func NewSocket(conn net.Conn) *Socket {
return &Socket{
conn: conn,
scanner: bufio.NewScanner(conn),
writer: bufio.NewWriter(conn),
}
}
func (socket *Socket) String() string {
return socket.conn.RemoteAddr().String()
}
func (socket *Socket) Close() {
if socket.closed {
return
}
socket.closed = true
socket.conn.Close()
Log.debug.Printf("%s closed", socket)
}
func (socket *Socket) Read() (line string, err error) {
if socket.closed {
err = io.EOF
return
}
for socket.scanner.Scan() {
line = socket.scanner.Text()
if len(line) == 0 {
continue
}
Log.debug.Printf("%s → %s", socket, line)
return
}
err = socket.scanner.Err()
socket.isError(err, R)
if err == nil {
err = io.EOF
}
return
}
func (socket *Socket) Write(line string) (err error) {
if socket.closed {
err = io.EOF
return
}
if _, err = socket.writer.WriteString(line); socket.isError(err, W) {
return
}
if _, err = socket.writer.WriteString(CRLF); socket.isError(err, W) {
return
}
if err = socket.writer.Flush(); socket.isError(err, W) {
return
}
Log.debug.Printf("%s ← %s", socket, line)
return
}
func (socket *Socket) isError(err error, dir rune) bool {
if err != nil {
if err != io.EOF {
Log.debug.Printf("%s %c error: %s", socket, dir, err)
}
return true
}
return false
}