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|
package util
import (
"net"
"time"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/stats"
)
// Listener wraps a net.Listener, and gives a place to store the timeout
// parameters. On Accept, it will wrap the net.Conn with our own Conn for us.
type Listener struct {
net.Listener
Timeout time.Duration
}
func (l *Listener) Accept() (net.Conn, error) {
c, err := l.Listener.Accept()
if err != nil {
return nil, err
}
stats.ConnectionOpen()
tc := &Conn{
Conn: c,
Timeout: l.Timeout,
}
return tc, nil
}
// Conn wraps a net.Conn and implements a "no activity timeout".
// Any activity (read or write) resets the deadline, so the connection
// only times out when there's no activity in either direction.
type Conn struct {
net.Conn
Timeout time.Duration
isClosed bool
}
// extendDeadline extends the connection deadline from now.
// This implements "no activity timeout" - any activity keeps the connection alive.
func (c *Conn) extendDeadline() error {
if c.Timeout > 0 {
return c.Conn.SetDeadline(time.Now().Add(c.Timeout))
}
return nil
}
func (c *Conn) Read(b []byte) (count int, e error) {
// Extend deadline before reading - any activity keeps connection alive
if err := c.extendDeadline(); err != nil {
return 0, err
}
count, e = c.Conn.Read(b)
if e == nil {
stats.BytesIn(int64(count))
}
return
}
func (c *Conn) Write(b []byte) (count int, e error) {
// Extend deadline before writing - any activity keeps connection alive
if err := c.extendDeadline(); err != nil {
return 0, err
}
count, e = c.Conn.Write(b)
if e == nil {
stats.BytesOut(int64(count))
}
return
}
func (c *Conn) Close() error {
err := c.Conn.Close()
if err == nil {
if !c.isClosed {
stats.ConnectionClose()
c.isClosed = true
}
}
return err
}
func NewListener(addr string, timeout time.Duration) (ipListener net.Listener, err error) {
listener, err := net.Listen("tcp", addr)
if err != nil {
return
}
ipListener = &Listener{
Listener: listener,
Timeout: timeout,
}
return
}
func NewIpAndLocalListeners(host string, port int, timeout time.Duration) (ipListener net.Listener, localListener net.Listener, err error) {
listener, err := net.Listen("tcp", JoinHostPort(host, port))
if err != nil {
return
}
ipListener = &Listener{
Listener: listener,
Timeout: timeout,
}
if host != "localhost" && host != "" && host != "0.0.0.0" && host != "127.0.0.1" && host != "[::]" && host != "[::1]" {
listener, err = net.Listen("tcp", JoinHostPort("localhost", port))
if err != nil {
glog.V(0).Infof("skip starting on %s:%d: %v", host, port, err)
return ipListener, nil, nil
}
localListener = &Listener{
Listener: listener,
Timeout: timeout,
}
}
return
}
|
