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listener.go
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/
listener.go
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package hoverfly
import (
"fmt"
"net"
"time"
log "github.com/sirupsen/logrus"
)
// StoppableListener - wrapper for tcp listener that can stop
type StoppableListener struct {
*net.TCPListener
stop chan int
}
// NewStoppableListener returns new StoppableListener listener
func NewStoppableListener(l net.Listener) (*StoppableListener, error) {
tcpListener, ok := l.(*net.TCPListener)
if !ok {
return nil, fmt.Errorf("failed to wrap listener")
}
sl := &StoppableListener{}
sl.TCPListener = tcpListener
sl.stop = make(chan int)
return sl, nil
}
// Accept - TCPListener waits for the next call, implements default interface method
func (sl *StoppableListener) Accept() (net.Conn, error) {
for {
sl.SetDeadline(time.Now().Add(time.Second))
newConn, err := sl.TCPListener.Accept()
select {
case <-sl.stop:
log.Debug("Stopping listener")
return nil, fmt.Errorf("Stopping listener")
default:
// continue as normal
}
if err != nil {
netErr, ok := err.(net.Error)
if ok && netErr.Timeout() && netErr.Temporary() {
continue
}
}
return newConn, err
}
}
// Stop - stops listener
func (sl *StoppableListener) Stop() {
close(sl.stop)
}