Golang TempErrCatcher.IsTemp方法代码示例

func main() {
	var normal tec.TempErrCatcher
	var skipper tec.TempErrCatcher
	skipper.IsTemp = func(e error) bool {
		return e == ErrSkip
	}

	fmt.Println("trying normal (uses Temporary interface)")
	tryTec(normal)
	fmt.Println("")
	fmt.Println("trying skipper (uses our IsTemp function)")
	tryTec(skipper)
}

// Accept waits for and returns the next connection to the listener.
// Note that unfortunately this
func (l *listener) Accept() (net.Conn, error) {

	// listeners dont have contexts. given changes dont make sense here anymore
	// note that the parent of listener will Close, which will interrupt all io.
	// Contexts and io don't mix.
	ctx := context.Background()

	var catcher tec.TempErrCatcher

	catcher.IsTemp = func(e error) bool {
		// ignore connection breakages up to this point. but log them
		if e == io.EOF {
			log.Debugf("listener ignoring conn with EOF: %s", e)
			return true
		}

		te, ok := e.(tec.Temporary)
		if ok {
			log.Debugf("listener ignoring conn with temporary err: %s", e)
			return te.Temporary()
		}
		return false
	}

	for {
		maconn, err := l.Listener.Accept()
		if err != nil {
			if catcher.IsTemporary(err) {
				continue
			}
			return nil, err
		}

		log.Debugf("listener %s got connection: %s <---> %s", l, maconn.LocalMultiaddr(), maconn.RemoteMultiaddr())

		if l.filters != nil && l.filters.AddrBlocked(maconn.RemoteMultiaddr()) {
			log.Debugf("blocked connection from %s", maconn.RemoteMultiaddr())
			maconn.Close()
			continue
		}
		// If we have a wrapper func, wrap this conn
		if l.wrapper != nil {
			maconn = l.wrapper(maconn)
		}

		c, err := newSingleConn(ctx, l.local, "", maconn)
		if err != nil {
			if catcher.IsTemporary(err) {
				continue
			}
			return nil, err
		}

		if l.privk == nil || EncryptConnections == false {
			log.Warning("listener %s listening INSECURELY!", l)
			return c, nil
		}
		sc, err := newSecureConn(ctx, l.privk, c)
		if err != nil {
			log.Infof("ignoring conn we failed to secure: %s %s", err, c)
			continue
		}
		return sc, nil
	}
}