Enable retry on websocket

integration/retry_test.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/containous/traefik/integration/try"
 	"github.com/go-check/check"
+	"github.com/gorilla/websocket"
 	checker "github.com/vdemeester/shakers"
 )
 
@@ -38,3 +39,29 @@ func (s *RetrySuite) TestRetry(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	c.Assert(response.StatusCode, checker.Equals, http.StatusOK)
 }
+
+func (s *RetrySuite) TestRetryWebsocket(c *check.C) {
+	whoamiEndpoint := s.composeProject.Container(c, "whoami").NetworkSettings.IPAddress
+	file := s.adaptFile(c, "fixtures/retry/simple.toml", struct {
+		WhoamiEndpoint string
+	}{whoamiEndpoint})
+	defer os.Remove(file)
+
+	cmd, display := s.traefikCmd(withConfigFile(file))
+	defer display(c)
+	err := cmd.Start()
+	c.Assert(err, checker.IsNil)
+	defer cmd.Process.Kill()
+
+	err = try.GetRequest("http://127.0.0.1:8080/api/providers", 60*time.Second, try.BodyContains("PathPrefix:/"))
+	c.Assert(err, checker.IsNil)
+
+	// This simulates a DialTimeout when connecting to the backend server.
+	_, response, err := websocket.DefaultDialer.Dial("ws://127.0.0.1:8000/echo", nil)
+	c.Assert(err, checker.IsNil)
+	c.Assert(response.StatusCode, checker.Equals, http.StatusSwitchingProtocols)
+
+	_, response, err = websocket.DefaultDialer.Dial("ws://127.0.0.1:8000/echo", nil)
+	c.Assert(err, checker.IsNil)
+	c.Assert(response.StatusCode, checker.Equals, http.StatusSwitchingProtocols)
+}