add support for port range in http broker

transport/http_transport.go

@@ -5,19 +5,17 @@ import (
 	"bytes"
 	"crypto/tls"
 	"errors"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
 	"net"
 	"net/http"
 	"net/url"
-	"strconv"
-	"strings"
 	"sync"
 	"time"
 
 	maddr "github.com/micro/misc/lib/addr"
+	mnet "github.com/micro/misc/lib/net"
 	mls "github.com/micro/misc/lib/tls"
 )
 
@@ -57,58 +55,6 @@ type httpTransportListener struct {
 	listener net.Listener
 }
 
-func listen(addr string, fn func(string) (net.Listener, error)) (net.Listener, error) {
-	// host:port || host:min-max
-	parts := strings.Split(addr, ":")
-
-	//
-	if len(parts) < 2 {
-		return fn(addr)
-	}
-
-	// try to extract port range
-	ports := strings.Split(parts[len(parts)-1], "-")
-
-	// single port
-	if len(ports) < 2 {
-		return fn(addr)
-	}
-
-	// we have a port range
-
-	// extract min port
-	min, err := strconv.Atoi(ports[0])
-	if err != nil {
-		return nil, errors.New("unable to extract port range")
-	}
-
-	// extract max port
-	max, err := strconv.Atoi(ports[1])
-	if err != nil {
-		return nil, errors.New("unable to extract port range")
-	}
-
-	// set host
-	host := parts[:len(parts)-1]
-
-	// range the ports
-	for port := min; port <= max; port++ {
-		// try bind to host:port
-		ln, err := fn(fmt.Sprintf("%s:%d", host, port))
-		if err == nil {
-			return ln, nil
-		}
-
-		// hit max port
-		if port == max {
-			return nil, err
-		}
-	}
-
-	// why are we here?
-	return nil, fmt.Errorf("unable to bind to %s", addr)
-}
-
 func (b *buffer) Close() error {
 	return nil
 }
@@ -457,13 +403,13 @@ func (h *httpTransport) Listen(addr string, opts ...ListenOption) (Listener, err
 			return tls.Listen("tcp", addr, config)
 		}
 
-		l, err = listen(addr, fn)
+		l, err = mnet.Listen(addr, fn)
 	} else {
 		fn := func(addr string) (net.Listener, error) {
 			return net.Listen("tcp", addr)
 		}
 
-		l, err = listen(addr, fn)
+		l, err = mnet.Listen(addr, fn)
 	}
 
 	if err != nil {