mirror of https://github.com/ergochat/ergo.git
131 lines
2.0 KiB
Go
131 lines
2.0 KiB
Go
package irc
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import (
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"bufio"
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"log"
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"net"
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"strings"
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)
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const (
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R = '→'
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W = '←'
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)
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type Socket struct {
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conn net.Conn
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done chan bool
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reader *bufio.Reader
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receive chan string
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send chan string
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writer *bufio.Writer
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}
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func NewSocket(conn net.Conn) *Socket {
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socket := &Socket{
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conn: conn,
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done: make(chan bool),
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reader: bufio.NewReader(conn),
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receive: make(chan string),
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send: make(chan string),
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writer: bufio.NewWriter(conn),
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}
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go socket.readLines()
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go socket.writeLines()
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return socket
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}
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func (socket *Socket) String() string {
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return socket.conn.RemoteAddr().String()
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}
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func (socket *Socket) Close() {
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socket.done <- true
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}
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func (socket *Socket) Read() <-chan string {
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return socket.receive
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}
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func (socket *Socket) Write(lines ...string) {
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for _, line := range lines {
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socket.send <- line
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}
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return
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}
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func (socket *Socket) readLines() {
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for {
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line, err := socket.reader.ReadString('\n')
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if socket.isError(err, R) {
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break
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}
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line = strings.TrimRight(line, "\r\n")
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if len(line) == 0 {
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continue
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}
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if DEBUG_NET {
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log.Printf("%s → %s", socket, line)
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}
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socket.receive <- line
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}
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close(socket.receive)
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socket.Close()
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}
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func (socket *Socket) writeLines() {
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done := false
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for !done {
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select {
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case line := <-socket.send:
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if _, err := socket.writer.WriteString(line); socket.isError(err, W) {
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break
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}
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if _, err := socket.writer.WriteString(CRLF); socket.isError(err, W) {
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break
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}
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if err := socket.writer.Flush(); socket.isError(err, W) {
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break
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}
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if DEBUG_NET {
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log.Printf("%s ← %s", socket, line)
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}
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case done = <-socket.done:
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continue
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}
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}
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if done {
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socket.conn.Close()
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}
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if DEBUG_NET {
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log.Printf("%s closed", socket)
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}
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// read incoming messages and discard to avoid hangs
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for {
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select {
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case <-socket.send:
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case <-socket.done:
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}
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}
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}
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func (socket *Socket) isError(err error, dir rune) bool {
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if err != nil {
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if DEBUG_NET {
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log.Printf("%s %c error: %s", socket, dir, err)
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}
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return true
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}
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return false
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}
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