Allow matching with FQDN hosts with trailing periods

integration/fixtures/file/simple-hosts.toml

@@ -0,0 +1,28 @@
+[global]
+checkNewVersion = false
+sendAnonymousUsage = false
+
+[log]
+level = "DEBUG"
+
+[entryPoints]
+  [entryPoints.web]
+    address = ":8000"
+
+[providers]
+   [providers.file]
+
+[http.routers]
+  [http.routers.router1]
+    rule = "Host(`test.localhost`)"
+    service = "service1"
+
+  [http.routers.router2]
+    rule = "Host(`test.foo.localhost.`)"
+    service = "service1"
+
+[http.services]
+  [http.services.service1.loadbalancer]
+    [[http.services.service1.loadbalancer.servers]]
+        URL = "{{.Server}}"
+        weight = 10

integration/simple_test.go

@@ -481,3 +481,54 @@ func (s *SimpleSuite) TestMultiprovider(c *check.C) {
 	c.Assert(err, checker.IsNil)
 
 }
+
+func (s *SimpleSuite) TestSimpleConfigurationHostRequestTrailingPeriod(c *check.C) {
+	s.createComposeProject(c, "base")
+	s.composeProject.Start(c)
+
+	server := "http://" + s.composeProject.Container(c, "whoami1").NetworkSettings.IPAddress
+
+	file := s.adaptFile(c, "fixtures/file/simple-hosts.toml", struct {
+		Server string
+	}{Server: server})
+	defer os.Remove(file)
+
+	cmd, output := s.traefikCmd(withConfigFile(file))
+	defer output(c)
+
+	err := cmd.Start()
+	c.Assert(err, checker.IsNil)
+	defer cmd.Process.Kill()
+
+	testCases := []struct {
+		desc        string
+		requestHost string
+	}{
+		{
+			desc:        "Request host without trailing period, rule without trailing period",
+			requestHost: "test.localhost",
+		},
+		{
+			desc:        "Request host with trailing period, rule without trailing period",
+			requestHost: "test.localhost.",
+		},
+		{
+			desc:        "Request host without trailing period, rule with trailing period",
+			requestHost: "test.foo.localhost",
+		},
+		{
+			desc:        "Request host with trailing period, rule with trailing period",
+			requestHost: "test.foo.localhost.",
+		},
+	}
+
+	for _, test := range testCases {
+		req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000", nil)
+		c.Assert(err, checker.IsNil)
+		req.Host = test.requestHost
+		err = try.Request(req, 1*time.Second, try.StatusCodeIs(http.StatusOK))
+		if err != nil {
+			c.Fatalf("Error while testing %s: %v", test.desc, err)
+		}
+	}
+}