mirror of
https://github.com/ergochat/ergo.git
synced 2024-11-22 20:09:41 +01:00
84 lines
1.6 KiB
Go
84 lines
1.6 KiB
Go
package irc
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import (
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"bufio"
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"io"
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"log"
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"net"
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"strings"
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)
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// Adapt `net.Conn` to a `chan string`.
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func StringReadChan(conn net.Conn) <-chan string {
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ch := make(chan string)
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reader := bufio.NewReader(conn)
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go func() {
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defer close(ch)
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for {
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line, err := reader.ReadString('\n')
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if err != nil {
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if err != io.EOF {
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log.Printf("%s → %s error: %s", conn.RemoteAddr(), conn.LocalAddr(), err)
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}
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break
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}
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if DEBUG_NET {
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log.Printf("%s → %s %s", conn.RemoteAddr(), conn.LocalAddr(), line)
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}
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ch <- strings.TrimSpace(line)
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}
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}()
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return ch
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}
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func maybeLogWriteError(conn net.Conn, err error) bool {
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if err != nil {
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if err != io.EOF {
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log.Printf("%s ← %s error: %s", conn.RemoteAddr(), conn.LocalAddr(), 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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func StringWriteChan(conn net.Conn) chan<- string {
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ch := make(chan string)
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writer := bufio.NewWriter(conn)
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go func() {
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defer close(ch)
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for str := range ch {
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if DEBUG_NET {
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log.Printf("%s ← %s %s", conn.RemoteAddr(), conn.LocalAddr(), str)
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}
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if _, err := writer.WriteString(str); maybeLogWriteError(conn, err) {
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break
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}
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if _, err := writer.WriteString(CRLF); maybeLogWriteError(conn, err) {
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break
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}
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if err := writer.Flush(); maybeLogWriteError(conn, err) {
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break
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}
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}
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}()
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return ch
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}
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func LookupHostname(addr net.Addr) string {
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addrStr := addr.String()
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ipaddr, _, err := net.SplitHostPort(addrStr)
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if err != nil {
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return addrStr
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}
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switch ipaddr {
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case "127.0.0.1", "::1":
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return "localhost"
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}
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names, err := net.LookupHost(ipaddr)
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if err != nil {
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return ipaddr
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}
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return names[0]
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}
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