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- 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
- }
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