forked from fvbock/endless
/
listener.go
97 lines (81 loc) · 1.7 KB
/
listener.go
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package endless
import (
"log"
"net"
"os"
"syscall"
"time"
"sync"
"bufio"
"io"
)
var bufioReaderCache sync.Pool
func newBufioReader(r io.Reader) *bufio.Reader {
if br, ok := bufioReaderCache.Get().(*bufio.Reader); ok {
br.Reset(r)
return br
}
return bufio.NewReader(r)
}
func putBufioReader(br *bufio.Reader) {
br.Reset(nil)
bufioReaderCache.Put(br)
}
type endlessListener struct {
net.Listener
stopped bool
server *endlessServer
}
func (el *endlessListener) Accept() (c net.Conn, err error) {
tc, err := el.Listener.(*net.TCPListener).AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true) // see http.tcpKeepAliveListener
tc.SetKeepAlivePeriod(3 * time.Minute) // see http.tcpKeepAliveListener
var rd *bufio.Reader
var head *Header
if el.server.ParseProxyProtocol {
rd = newBufioReader(tc)
var headErr error
head, headErr = ReadHeader(rd)
if headErr != nil {
// Eat the error, let this request continue
log.Printf("Error reading proxy protocol header: %v\n", headErr)
}
c = &endlessConn{
Conn: tc,
server: el.server,
ProxyHeader: head,
rd: rd,
}
} else {
c = &endlessConn{
Conn: tc,
server: el.server,
}
}
log.Println("Adding endlessConn")
el.server.wg.Add(1)
return
}
func newEndlessListener(l net.Listener, srv *endlessServer) (el *endlessListener) {
el = &endlessListener{
Listener: l,
server: srv,
}
return
}
func (el *endlessListener) Close() error {
if el.stopped {
return syscall.EINVAL
}
el.stopped = true
return el.Listener.Close()
}
func (el *endlessListener) File() *os.File {
// returns a dup(2) - FD_CLOEXEC flag *not* set
tl := el.Listener.(*net.TCPListener)
fl, _ := tl.File()
return fl
}