Implement h2c with backend

integration/fixtures/grpc/config_h2c.toml

@@ -0,0 +1,29 @@
+defaultEntryPoints = ["https"]
+
+rootCAs = [ """{{ .CertContent }}""" ]
+
+[entryPoints]
+  [entryPoints.https]
+  address = ":4443"
+    [entryPoints.https.tls]
+     [[entryPoints.https.tls.certificates]]
+     certFile = """{{ .CertContent }}"""
+     keyFile  = """{{ .KeyContent }}"""
+
+
+[api]
+
+[file]
+
+[backends]
+  [backends.backend1]
+    [backends.backend1.servers.server1]
+    url = "h2c://127.0.0.1:{{ .GRPCServerPort }}"
+    weight = 1
+
+
+[frontends]
+  [frontends.frontend1]
+  backend = "backend1"
+    [frontends.frontend1.routes.test_1]
+    rule = "Host:127.0.0.1"

integration/grpc_test.go

@@ -67,6 +67,15 @@ func startGRPCServer(lis net.Listener, server *myserver) error {
 	helloworld.RegisterGreeterServer(s, server)
 	return s.Serve(lis)
 }
+
+func starth2cGRPCServer(lis net.Listener, server *myserver) error {
+	s := grpc.NewServer()
+	defer s.Stop()
+
+	helloworld.RegisterGreeterServer(s, server)
+	return s.Serve(lis)
+}
+
 func getHelloClientGRPC() (helloworld.GreeterClient, func() error, error) {
 	roots := x509.NewCertPool()
 	roots.AppendCertsFromPEM(LocalhostCert)
@@ -137,12 +146,54 @@ func (s *GRPCSuite) TestGRPC(c *check.C) {
 	// wait for Traefik
 	err = try.GetRequest("http://127.0.0.1:8080/api/providers", 1*time.Second, try.BodyContains("Host:127.0.0.1"))
 	c.Assert(err, check.IsNil)
+
 	var response string
 	err = try.Do(1*time.Second, func() error {
 		response, err = callHelloClientGRPC("World")
 		return err
 	})
+	c.Assert(err, check.IsNil)
+	c.Assert(response, check.Equals, "Hello World")
+}
 
+func (s *GRPCSuite) TestGRPCh2c(c *check.C) {
+	lis, err := net.Listen("tcp", ":0")
+	_, port, err := net.SplitHostPort(lis.Addr().String())
+	c.Assert(err, check.IsNil)
+
+	go func() {
+		err := starth2cGRPCServer(lis, &myserver{})
+		c.Log(err)
+		c.Assert(err, check.IsNil)
+	}()
+
+	file := s.adaptFile(c, "fixtures/grpc/config_h2c.toml", struct {
+		CertContent    string
+		KeyContent     string
+		GRPCServerPort string
+	}{
+		CertContent:    string(LocalhostCert),
+		KeyContent:     string(LocalhostKey),
+		GRPCServerPort: port,
+	})
+
+	defer os.Remove(file)
+	cmd, display := s.traefikCmd(withConfigFile(file))
+	defer display(c)
+
+	err = cmd.Start()
+	c.Assert(err, check.IsNil)
+	defer cmd.Process.Kill()
+
+	// wait for Traefik
+	err = try.GetRequest("http://127.0.0.1:8080/api/providers", 1*time.Second, try.BodyContains("Host:127.0.0.1"))
+	c.Assert(err, check.IsNil)
+
+	var response string
+	err = try.Do(1*time.Second, func() error {
+		response, err = callHelloClientGRPC("World")
+		return err
+	})
 	c.Assert(err, check.IsNil)
 	c.Assert(response, check.Equals, "Hello World")
 }
@@ -179,12 +230,12 @@ func (s *GRPCSuite) TestGRPCInsecure(c *check.C) {
 	// wait for Traefik
 	err = try.GetRequest("http://127.0.0.1:8080/api/providers", 1*time.Second, try.BodyContains("Host:127.0.0.1"))
 	c.Assert(err, check.IsNil)
+
 	var response string
 	err = try.Do(1*time.Second, func() error {
 		response, err = callHelloClientGRPC("World")
 		return err
 	})
-
 	c.Assert(err, check.IsNil)
 	c.Assert(response, check.Equals, "Hello World")
 }