-host flag, fixes #2

cmd/tile38-server/main.go

@@ -18,6 +18,7 @@ import (
 var (
 	dir         string
 	port        int
+	host        string
 	verbose     bool
 	veryVerbose bool
 	devMode     bool
@@ -25,7 +26,8 @@ var (
 )
 
 func main() {
-	flag.IntVar(&port, "p", 9851, "The listening port for communication.")
+	flag.IntVar(&port, "p", 9851, "The listening port.")
+	flag.StringVar(&host, "h", "127.0.0.1", "The listening host.")
 	flag.StringVar(&dir, "d", "data", "The data directory.")
 	flag.BoolVar(&verbose, "v", false, "Enable verbose logging.")
 	flag.BoolVar(&quiet, "q", false, "Quiet logging. Totally silent.")
@@ -53,13 +55,13 @@ func main() {
    _______ _______
   |       |       |
   |____   |   _   |   Tile38 %s (%s) %d bit (%s/%s)
-  |       |       |   Port: %d, PID: %d
+  |       |       |   Host: %s, Port: %d, PID: %d
   |____   |   _   |
   |       |       |   tile38.com
   |_______|_______|
-`+"\n", core.Version, core.GitSHA, strconv.IntSize, runtime.GOARCH, runtime.GOOS, port, os.Getpid())
+`+"\n", core.Version, core.GitSHA, strconv.IntSize, runtime.GOARCH, runtime.GOOS, host, port, os.Getpid())
 
-	if err := controller.ListenAndServe(port, dir); err != nil {
+	if err := controller.ListenAndServe(host, port, dir); err != nil {
 		log.Fatal(err)
 	}
 }

controller/controller.go

@@ -52,6 +52,7 @@ func (col *collectionT) Less(item btree.Item) bool {
 // Controller is a tile38 controller
 type Controller struct {
 	mu        sync.RWMutex
+	host      string
 	port      int
 	f         *os.File
 	cols      *btree.BTree                      // use both tree and map. provide ordering.
@@ -80,9 +81,10 @@ type Config struct {
 }
 
 // ListenAndServe starts a new tile38 server
-func ListenAndServe(port int, dir string) error {
+func ListenAndServe(host string, port int, dir string) error {
 	log.Infof("Server started, Tile38 version %s, git %s", core.Version, core.GitSHA)
 	c := &Controller{
+		host:    host,
 		port:    port,
 		dir:     dir,
 		cols:    btree.New(16),
@@ -127,7 +129,7 @@ func ListenAndServe(port int, dir string) error {
 		}
 		return nil
 	}
-	return server.ListenAndServe(port, handler)
+	return server.ListenAndServe(host, port, handler)
 }
 
 func (c *Controller) setCol(key string, col *collection.Collection) {

server/server.go

@@ -20,10 +20,10 @@ var ShowDebugMessages = false
 
 // ListenAndServe starts a tile38 server at the specified address.
 func ListenAndServe(
-	port int,
+	host string, port int,
 	handler func(command []byte, conn net.Conn, rd *bufio.Reader, w io.Writer, websocket bool) error,
 ) error {
-	ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
+	ln, err := net.Listen("tcp", fmt.Sprintf("%s:%d", host, port))
 	if err != nil {
 		return err
 	}