break out ws.go

cmd/server/ws.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/coder/websocket"
+)
+
+func isWS(r *http.Request) bool {
+	return r.URL.Path == "/ws" || strings.HasPrefix(r.URL.Path, "/ws/")
+}
+
+func (s *S) serveWS(httpw http.ResponseWriter, httpr *http.Request) error {
+	ctx := httpr.Context()
+
+	c, err := websocket.Accept(httpw, httpr, nil)
+	if err != nil {
+		return err
+	}
+	defer c.CloseNow()
+
+	if err := c.Write(ctx, 1, []byte("hello world")); err != nil {
+		return err
+	}
+
+	return fmt.Errorf("not impl")
+}