Allow multiple secure middlewares to operate independently

integration/fixtures/headers/secure_multiple.toml

@@ -0,0 +1,33 @@
+[global]
+  checkNewVersion = false
+  sendAnonymousUsage = false
+
+[log]
+  level = "DEBUG"
+
+[entryPoints]
+  [entryPoints.web]
+    address = ":8000"
+
+[providers.file]
+  filename = "{{ .SelfFilename }}"
+
+## dynamic configuration ##
+
+[http.routers]
+  [http.routers.router1]
+    rule = "Host(`test.localhost`)"
+    middlewares = ["foo", "bar"]
+    service = "service1"
+
+
+[http.middlewares]
+  [http.middlewares.foo.headers]
+    frameDeny = true
+  [http.middlewares.bar.headers]
+    contentTypeNosniff = true
+
+[http.services]
+  [http.services.service1.loadBalancer]
+    [[http.services.service1.loadBalancer.servers]]
+      url = "http://127.0.0.1:9000"

integration/headers_test.go

@@ -153,3 +153,44 @@ func (s *HeadersSuite) TestSecureHeadersResponses(c *check.C) {
 		c.Assert(err, checker.IsNil)
 	}
 }
+
+func (s *HeadersSuite) TestMultipleSecureHeadersResponses(c *check.C) {
+	file := s.adaptFile(c, "fixtures/headers/secure_multiple.toml", struct{}{})
+	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()
+
+	backend := startTestServer("9000", http.StatusOK)
+	defer backend.Close()
+
+	err = try.GetRequest(backend.URL, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
+	c.Assert(err, checker.IsNil)
+
+	testCase := []struct {
+		desc     string
+		expected http.Header
+		reqHost  string
+	}{
+		{
+			desc: "Feature-Policy Set",
+			expected: http.Header{
+				"X-Frame-Options":        {"DENY"},
+				"X-Content-Type-Options": {"nosniff"},
+			},
+			reqHost: "test.localhost",
+		},
+	}
+
+	for _, test := range testCase {
+		req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/", nil)
+		c.Assert(err, checker.IsNil)
+		req.Host = test.reqHost
+
+		err = try.Request(req, 500*time.Millisecond, try.HasHeaderStruct(test.expected))
+		c.Assert(err, checker.IsNil)
+	}
+}