merge the conflict

.travis.yml

@@ -1,17 +1,21 @@
 language: go
 
 go:
-  - 1.5.3
+  - 1.5.4
-  - 1.6
+  - 1.6.3
+
+go_import_path: google.golang.org/grpc
 
 before_install:
+  - go get golang.org/x/tools/cmd/goimports
+  - go get github.com/golang/lint/golint
   - go get github.com/axw/gocov/gocov
   - go get github.com/mattn/goveralls
   - go get golang.org/x/tools/cmd/cover
 
-install:
-  - mkdir -p "$GOPATH/src/google.golang.org"
-  - mv "$TRAVIS_BUILD_DIR" "$GOPATH/src/google.golang.org/grpc"
-
 script:
+  - '! gofmt -s -d -l . 2>&1 | read'
+  - '! goimports -l . | read'
+  - '! golint ./... | grep -vE "(_string|\.pb)\.go:"'
+  - '! go tool vet -all . 2>&1 | grep -vE "constant [0-9]+ not a string in call to Errorf"'
   - make test testrace

balancer_test.go

@@ -243,7 +243,7 @@ func TestCloseWithPendingRPC(t *testing.T) {
 		t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want %s", err, servers[0].port)
 	}
 	// Remove the server.
-	updates := []*naming.Update{&naming.Update{
+	updates := []*naming.Update{{
 		Op:   naming.Delete,
 		Addr: "127.0.0.1:" + servers[0].port,
 	}}
@@ -287,7 +287,7 @@ func TestGetOnWaitChannel(t *testing.T) {
 		t.Fatalf("Failed to create ClientConn: %v", err)
 	}
 	// Remove all servers so that all upcoming RPCs will block on waitCh.
-	updates := []*naming.Update{&naming.Update{
+	updates := []*naming.Update{{
 		Op:   naming.Delete,
 		Addr: "127.0.0.1:" + servers[0].port,
 	}}
@@ -310,7 +310,7 @@ func TestGetOnWaitChannel(t *testing.T) {
 		}
 	}()
 	// Add a connected server to get the above RPC through.
-	updates = []*naming.Update{&naming.Update{
+	updates = []*naming.Update{{
 		Op:   naming.Add,
 		Addr: "127.0.0.1:" + servers[0].port,
 	}}

benchmark/client/main.go

@@ -58,7 +58,7 @@ func closeLoopUnary() {
 
 	for i := 0; i < *maxConcurrentRPCs; i++ {
 		go func() {
-			for _ = range ch {
+			for range ch {
 				start := time.Now()
 				unaryCaller(tc)
 				elapse := time.Since(start)

clientconn.go

@@ -196,7 +196,7 @@ func WithTimeout(d time.Duration) DialOption {
 }
 
 // WithDialer returns a DialOption that specifies a function to use for dialing network addresses.
-func WithDialer(f func(addr string, timeout time.Duration) (net.Conn, error)) DialOption {
+func WithDialer(f func(string, time.Duration, <-chan struct{}) (net.Conn, error)) DialOption {
 	return func(o *dialOptions) {
 		o.copts.Dialer = f
 	}
@@ -364,8 +364,8 @@ func (cc *ClientConn) newAddrConn(addr Address, skipWait bool) error {
 		cc:    cc,
 		addr:  addr,
 		dopts: cc.dopts,
-		shutdownChan: make(chan struct{}),
 	}
+	ac.dopts.copts.Cancel = make(chan struct{})
 	if EnableTracing {
 		ac.events = trace.NewEventLog("grpc.ClientConn", ac.addr.Addr)
 	}
@@ -471,7 +471,6 @@ type addrConn struct {
 	cc     *ClientConn
 	addr   Address
 	dopts  dialOptions
-	shutdownChan chan struct{}
 	events trace.EventLog
 
 	mu      sync.Mutex
@@ -558,12 +557,13 @@ func (ac *addrConn) resetTransport(closeTransport bool) error {
 			t.Close()
 		}
 		sleepTime := ac.dopts.bs.backoff(retries)
-		ac.dopts.copts.Timeout = sleepTime
+		copts := ac.dopts.copts
+		copts.Timeout = sleepTime
 		if sleepTime < minConnectTimeout {
-			ac.dopts.copts.Timeout = minConnectTimeout
+			copts.Timeout = minConnectTimeout
 		}
 		connectTime := time.Now()
-		newTransport, err := transport.NewClientTransport(ac.addr.Addr, &ac.dopts.copts)
+		newTransport, err := transport.NewClientTransport(ac.addr.Addr, copts)
 		if err != nil {
 			ac.mu.Lock()
 			if ac.state == Shutdown {
@@ -586,7 +586,7 @@ func (ac *addrConn) resetTransport(closeTransport bool) error {
 			closeTransport = false
 			select {
 			case <-time.After(sleepTime):
-			case <-ac.shutdownChan:
+			case <-ac.dopts.copts.Cancel:
 			}
 			retries++
 			grpclog.Printf("grpc: addrConn.resetTransport failed to create client transport: %v; Reconnecting to %q", err, ac.addr)
@@ -621,9 +621,9 @@ func (ac *addrConn) transportMonitor() {
 		t := ac.transport
 		ac.mu.Unlock()
 		select {
-		// shutdownChan is needed to detect the teardown when
+		// Cancel is needed to detect the teardown when
 		// the addrConn is idle (i.e., no RPC in flight).
-		case <-ac.shutdownChan:
+		case <-ac.dopts.copts.Cancel:
 			select {
 			case <-t.Error():
 				t.Close()
@@ -647,7 +647,7 @@ func (ac *addrConn) transportMonitor() {
 			return
 		case <-t.Error():
 			select {
-			case <-ac.shutdownChan:
+			case <-ac.dopts.copts.Cancel:
 				t.Close()
 				return
 			case <-t.GoAway():
@@ -750,8 +750,8 @@ func (ac *addrConn) tearDown(err error) {
 	if ac.transport != nil && err != errConnDrain {
 		ac.transport.Close()
 	}
-	if ac.shutdownChan != nil {
+	if ac.dopts.copts.Cancel != nil {
-		close(ac.shutdownChan)
+		close(ac.dopts.copts.Cancel)
 	}
 	return
 }

examples/route_guide/client/client.go

@@ -153,7 +153,7 @@ func runRouteChat(client pb.RouteGuideClient) {
 func randomPoint(r *rand.Rand) *pb.Point {
 	lat := (r.Int31n(180) - 90) * 1e7
 	long := (r.Int31n(360) - 180) * 1e7
-	return &pb.Point{lat, long}
+	return &pb.Point{Latitude: lat, Longitude: long}
 }
 
 func main() {
@@ -186,13 +186,16 @@ func main() {
 	client := pb.NewRouteGuideClient(conn)
 
 	// Looking for a valid feature
-	printFeature(client, &pb.Point{409146138, -746188906})
+	printFeature(client, &pb.Point{Latitude: 409146138, Longitude: -746188906})
 
 	// Feature missing.
-	printFeature(client, &pb.Point{0, 0})
+	printFeature(client, &pb.Point{Latitude: 0, Longitude: 0})
 
 	// Looking for features between 40, -75 and 42, -73.
-	printFeatures(client, &pb.Rectangle{&pb.Point{Latitude: 400000000, Longitude: -750000000}, &pb.Point{Latitude: 420000000, Longitude: -730000000}})
+	printFeatures(client, &pb.Rectangle{
+		Lo: &pb.Point{Latitude: 400000000, Longitude: -750000000},
+		Hi: &pb.Point{Latitude: 420000000, Longitude: -730000000},
+	})
 
 	// RecordRoute
 	runRecordRoute(client)

examples/route_guide/server/server.go

@@ -79,7 +79,7 @@ func (s *routeGuideServer) GetFeature(ctx context.Context, point *pb.Point) (*pb
 		}
 	}
 	// No feature was found, return an unnamed feature
-	return &pb.Feature{"", point}, nil
+	return &pb.Feature{Location: point}, nil
 }
 
 // ListFeatures lists all features contained within the given bounding Rectangle.

health/health.go

@@ -11,19 +11,22 @@ import (
 	healthpb "google.golang.org/grpc/health/grpc_health_v1"
 )
 
-type HealthServer struct {
+// Server implements `service Health`.
+type Server struct {
 	mu sync.Mutex
-	// statusMap stores the serving status of the services this HealthServer monitors.
+	// statusMap stores the serving status of the services this Server monitors.
 	statusMap map[string]healthpb.HealthCheckResponse_ServingStatus
 }
 
-func NewHealthServer() *HealthServer {
+// NewServer returns a new Server.
-	return &HealthServer{
+func NewServer() *Server {
+	return &Server{
 		statusMap: make(map[string]healthpb.HealthCheckResponse_ServingStatus),
 	}
 }
 
-func (s *HealthServer) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*healthpb.HealthCheckResponse, error) {
+// Check implements `service Health`.
+func (s *Server) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*healthpb.HealthCheckResponse, error) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	if in.Service == "" {
@@ -42,7 +45,7 @@ func (s *HealthServer) Check(ctx context.Context, in *healthpb.HealthCheckReques
 
 // SetServingStatus is called when need to reset the serving status of a service
 // or insert a new service entry into the statusMap.
-func (s *HealthServer) SetServingStatus(service string, status healthpb.HealthCheckResponse_ServingStatus) {
+func (s *Server) SetServingStatus(service string, status healthpb.HealthCheckResponse_ServingStatus) {
 	s.mu.Lock()
 	s.statusMap[service] = status
 	s.mu.Unlock()

metadata/metadata.go

@@ -60,15 +60,21 @@ func encodeKeyValue(k, v string) (string, string) {
 
 // DecodeKeyValue returns the original key and value corresponding to the
 // encoded data in k, v.
+// If k is a binary header and v contains comma, v is split on comma before decoded,
+// and the decoded v will be joined with comma before returned.
 func DecodeKeyValue(k, v string) (string, string, error) {
 	if !strings.HasSuffix(k, binHdrSuffix) {
 		return k, v, nil
 	}
-	val, err := base64.StdEncoding.DecodeString(v)
+	vvs := strings.Split(v, ",")
+	for i, vv := range vvs {
+		val, err := base64.StdEncoding.DecodeString(vv)
 		if err != nil {
 			return "", "", err
 		}
-	return k, string(val), nil
+		vvs[i] = string(val)
+	}
+	return k, strings.Join(vvs, ","), nil
 }
 
 // MD is a mapping from metadata keys to values. Users should use the following

metadata/metadata_test.go

@@ -74,6 +74,8 @@ func TestDecodeKeyValue(t *testing.T) {
 		{"a", "abc", "a", "abc", nil},
 		{"key-bin", "Zm9vAGJhcg==", "key-bin", "foo\x00bar", nil},
 		{"key-bin", "woA=", "key-bin", binaryValue, nil},
+		{"a", "abc,efg", "a", "abc,efg", nil},
+		{"key-bin", "Zm9vAGJhcg==,Zm9vAGJhcg==", "key-bin", "foo\x00bar,foo\x00bar", nil},
 	} {
 		k, v, err := DecodeKeyValue(test.kin, test.vin)
 		if k != test.kout || !reflect.DeepEqual(v, test.vout) || !reflect.DeepEqual(err, test.err) {

reflection/serverreflection.go

@@ -70,7 +70,7 @@ import (
 type serverReflectionServer struct {
 	s *grpc.Server
 	// TODO add more cache if necessary
-	serviceInfo map[string]*grpc.ServiceInfo // cache for s.GetServiceInfo()
+	serviceInfo map[string]grpc.ServiceInfo // cache for s.GetServiceInfo()
 }
 
 // Register registers the server reflection service on the given gRPC server.

rpc_util_test.go

@@ -184,8 +184,8 @@ func TestContextErr(t *testing.T) {
 
 func TestErrorsWithSameParameters(t *testing.T) {
 	const description = "some description"
-	e1 := Errorf(codes.AlreadyExists, description)
+	e1 := Errorf(codes.AlreadyExists, description).(*rpcError)
-	e2 := Errorf(codes.AlreadyExists, description)
+	e2 := Errorf(codes.AlreadyExists, description).(*rpcError)
 	if e1 == e2 {
 		t.Fatalf("Error interfaces should not be considered equal - e1: %p - %v  e2: %p - %v", e1, e1, e2, e2)
 	}

server.go

@@ -269,8 +269,8 @@ type ServiceInfo struct {
 
 // GetServiceInfo returns a map from service names to ServiceInfo.
 // Service names include the package names, in the form of <package>.<service>.
-func (s *Server) GetServiceInfo() map[string]*ServiceInfo {
+func (s *Server) GetServiceInfo() map[string]ServiceInfo {
-	ret := make(map[string]*ServiceInfo)
+	ret := make(map[string]ServiceInfo)
 	for n, srv := range s.m {
 		methods := make([]MethodInfo, 0, len(srv.md)+len(srv.sd))
 		for m := range srv.md {
@@ -288,7 +288,7 @@ func (s *Server) GetServiceInfo() map[string]*ServiceInfo {
 			})
 		}
 
-		ret[n] = &ServiceInfo{
+		ret[n] = ServiceInfo{
 			Methods:  methods,
 			Metadata: srv.mdata,
 		}

server_test.go

@@ -90,15 +90,15 @@ func TestGetServiceInfo(t *testing.T) {
 	server.RegisterService(&testSd, &testServer{})
 
 	info := server.GetServiceInfo()
-	want := map[string]*ServiceInfo{
+	want := map[string]ServiceInfo{
-		"grpc.testing.EmptyService": &ServiceInfo{
+		"grpc.testing.EmptyService": {
 			Methods: []MethodInfo{
-				MethodInfo{
+				{
 					Name:           "EmptyCall",
 					IsClientStream: false,
 					IsServerStream: false,
 				},
-				MethodInfo{
+				{
 					Name:           "EmptyStream",
 					IsClientStream: true,
 					IsServerStream: false,
@@ -108,6 +108,6 @@ func TestGetServiceInfo(t *testing.T) {
 	}
 
 	if !reflect.DeepEqual(info, want) {
-		t.Errorf("GetServiceInfo() = %q, want %q", info, want)
+		t.Errorf("GetServiceInfo() = %+v, want %+v", info, want)
 	}
 }

test/end2end_test.go

@@ -300,39 +300,35 @@ func (s *testServer) HalfDuplexCall(stream testpb.TestService_HalfDuplexCallServ
 
 const tlsDir = "testdata/"
 
-func unixDialer(addr string, timeout time.Duration) (net.Conn, error) {
-	return net.DialTimeout("unix", addr, timeout)
-}
-
 type env struct {
 	name        string
 	network     string // The type of network such as tcp, unix, etc.
-	dialer      func(addr string, timeout time.Duration) (net.Conn, error)
 	security    string // The security protocol such as TLS, SSH, etc.
 	httpHandler bool   // whether to use the http.Handler ServerTransport; requires TLS
 }
 
 func (e env) runnable() bool {
-	if runtime.GOOS == "windows" && strings.HasPrefix(e.name, "unix-") {
+	if runtime.GOOS == "windows" && e.network == "unix" {
 		return false
 	}
 	return true
 }
 
-func (e env) getDialer() func(addr string, timeout time.Duration) (net.Conn, error) {
+func (e env) dialer(addr string, timeout time.Duration, cancel <-chan struct{}) (net.Conn, error) {
-	if e.dialer != nil {
+	// NB: Go 1.6 added a Cancel field on net.Dialer, which would allow this
-		return e.dialer
+	// to be written as
-	}
+	//
-	return func(addr string, timeout time.Duration) (net.Conn, error) {
+	// `(&net.Dialer{Cancel: cancel, Timeout: timeout}).Dial(e.network, addr)`
-		return net.DialTimeout("tcp", addr, timeout)
+	//
-	}
+	// but that would break compatibility with earlier Go versions.
+	return net.DialTimeout(e.network, addr, timeout)
 }
 
 var (
 	tcpClearEnv  = env{name: "tcp-clear", network: "tcp"}
 	tcpTLSEnv    = env{name: "tcp-tls", network: "tcp", security: "tls"}
-	unixClearEnv = env{name: "unix-clear", network: "unix", dialer: unixDialer}
+	unixClearEnv = env{name: "unix-clear", network: "unix"}
-	unixTLSEnv   = env{name: "unix-tls", network: "unix", dialer: unixDialer, security: "tls"}
+	unixTLSEnv   = env{name: "unix-tls", network: "unix", security: "tls"}
 	handlerEnv   = env{name: "handler-tls", network: "tcp", security: "tls", httpHandler: true}
 	allEnv       = []env{tcpClearEnv, tcpTLSEnv, unixClearEnv, unixTLSEnv, handlerEnv}
 )
@@ -371,7 +367,7 @@ type test struct {
 
 	// Configurable knobs, after newTest returns:
 	testServer        testpb.TestServiceServer // nil means none
-	healthServer      *health.HealthServer     // nil means disabled
+	healthServer      *health.Server           // nil means disabled
 	maxStream         uint32
 	userAgent         string
 	clientCompression bool
@@ -515,9 +511,7 @@ func (te *test) declareLogNoise(phrases ...string) {
 }
 
 func (te *test) withServerTester(fn func(st *serverTester)) {
-	var c net.Conn
+	c, err := te.e.dialer(te.srvAddr, 10*time.Second, nil)
-	var err error
-	c, err = te.e.getDialer()(te.srvAddr, 10*time.Second)
 	if err != nil {
 		te.t.Fatal(err)
 	}
@@ -857,7 +851,7 @@ func TestHealthCheckOnSuccess(t *testing.T) {
 
 func testHealthCheckOnSuccess(t *testing.T, e env) {
 	te := newTest(t, e)
-	hs := health.NewHealthServer()
+	hs := health.NewServer()
 	hs.SetServingStatus("grpc.health.v1.Health", 1)
 	te.healthServer = hs
 	te.startServer(&testServer{security: e.security})
@@ -883,7 +877,7 @@ func testHealthCheckOnFailure(t *testing.T, e env) {
 		"Failed to dial ",
 		"grpc: the client connection is closing; please retry",
 	)
-	hs := health.NewHealthServer()
+	hs := health.NewServer()
 	hs.SetServingStatus("grpc.health.v1.HealthCheck", 1)
 	te.healthServer = hs
 	te.startServer(&testServer{security: e.security})
@@ -927,7 +921,7 @@ func TestHealthCheckServingStatus(t *testing.T) {
 
 func testHealthCheckServingStatus(t *testing.T, e env) {
 	te := newTest(t, e)
-	hs := health.NewHealthServer()
+	hs := health.NewServer()
 	te.healthServer = hs
 	te.startServer(&testServer{security: e.security})
 	defer te.tearDown()

transport/go16.go

@@ -0,0 +1,45 @@
+// +build go1.6
+
+/*
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"net"
+	"time"
+)
+
+// newDialer constructs a net.Dialer.
+func newDialer(timeout time.Duration, cancel <-chan struct{}) *net.Dialer {
+	return &net.Dialer{Cancel: cancel, Timeout: timeout}
+}

transport/handler_server.go

@@ -83,7 +83,7 @@ func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTr
 	}
 
 	if v := r.Header.Get("grpc-timeout"); v != "" {
-		to, err := timeoutDecode(v)
+		to, err := decodeTimeout(v)
 		if err != nil {
 			return nil, StreamErrorf(codes.Internal, "malformed time-out: %v", err)
 		}
@@ -194,7 +194,7 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code,
 		h := ht.rw.Header()
 		h.Set("Grpc-Status", fmt.Sprintf("%d", statusCode))
 		if statusDesc != "" {
-			h.Set("Grpc-Message", grpcMessageEncode(statusDesc))
+			h.Set("Grpc-Message", encodeGrpcMessage(statusDesc))
 		}
 		if md := s.Trailer(); len(md) > 0 {
 			for k, vv := range md {

transport/handler_server_test.go

@@ -333,7 +333,7 @@ func handleStreamCloseBodyTest(t *testing.T, statusCode codes.Code, msg string)
 		"Content-Type": {"application/grpc"},
 		"Trailer":      {"Grpc-Status", "Grpc-Message"},
 		"Grpc-Status":  {fmt.Sprint(uint32(statusCode))},
-		"Grpc-Message": {grpcMessageEncode(msg)},
+		"Grpc-Message": {encodeGrpcMessage(msg)},
 	}
 	if !reflect.DeepEqual(st.rw.HeaderMap, wantHeader) {
 		t.Errorf("Header+Trailer mismatch.\n got: %#v\nwant: %#v", st.rw.HeaderMap, wantHeader)
@@ -381,7 +381,7 @@ func TestHandlerTransport_HandleStreams_Timeout(t *testing.T) {
 		"Content-Type": {"application/grpc"},
 		"Trailer":      {"Grpc-Status", "Grpc-Message"},
 		"Grpc-Status":  {"4"},
-		"Grpc-Message": {grpcMessageEncode("too slow")},
+		"Grpc-Message": {encodeGrpcMessage("too slow")},
 	}
 	if !reflect.DeepEqual(rw.HeaderMap, wantHeader) {
 		t.Errorf("Header+Trailer Map mismatch.\n got: %#v\nwant: %#v", rw.HeaderMap, wantHeader)

transport/http2_client.go

@@ -107,20 +107,21 @@ type http2Client struct {
 	prevGoAwayID uint32
 }
 
+func dial(fn func(string, time.Duration, <-chan struct{}) (net.Conn, error), addr string, timeout time.Duration, cancel <-chan struct{}) (net.Conn, error) {
+	if fn != nil {
+		return fn(addr, timeout, cancel)
+	}
+	return newDialer(timeout, cancel).Dial("tcp", addr)
+}
+
 // newHTTP2Client constructs a connected ClientTransport to addr based on HTTP2
 // and starts to receive messages on it. Non-nil error returns if construction
 // fails.
-func newHTTP2Client(addr string, opts *ConnectOptions) (_ ClientTransport, err error) {
+func newHTTP2Client(addr string, opts ConnectOptions) (_ ClientTransport, err error) {
-	if opts.Dialer == nil {
-		// Set the default Dialer.
-		opts.Dialer = func(addr string, timeout time.Duration) (net.Conn, error) {
-			return net.DialTimeout("tcp", addr, timeout)
-		}
-	}
 	scheme := "http"
 	startT := time.Now()
 	timeout := opts.Timeout
-	conn, connErr := opts.Dialer(addr, timeout)
+	conn, connErr := dial(opts.Dialer, addr, timeout, opts.Cancel)
 	if connErr != nil {
 		return nil, ConnectionErrorf("transport: %v", connErr)
 	}
@@ -341,7 +342,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
 		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress})
 	}
 	if timeout > 0 {
-		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: timeoutEncode(timeout)})
+		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: encodeTimeout(timeout)})
 	}
 	for k, v := range authData {
 		// Capital header names are illegal in HTTP/2.

transport/http2_server.go

@@ -265,6 +265,7 @@ func (t *http2Server) HandleStreams(handle func(*Stream)) {
 				t.controlBuf.put(&resetStream{se.StreamID, se.Code})
 				continue
 			}
+			grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err)
 			t.Close()
 			return
 		}
@@ -507,7 +508,7 @@ func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc s
 			Name:  "grpc-status",
 			Value: strconv.Itoa(int(statusCode)),
 		})
-	t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: grpcMessageEncode(statusDesc)})
+	t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(statusDesc)})
 	// Attach the trailer metadata.
 	for k, v := range s.trailer {
 		// Clients don't tolerate reading restricted headers after some non restricted ones were sent.

transport/http_util.go

@@ -35,6 +35,7 @@ package transport
 
 import (
 	"bufio"
+	"bytes"
 	"fmt"
 	"io"
 	"net"
@@ -174,11 +175,11 @@ func (d *decodeState) processHeaderField(f hpack.HeaderField) {
 		}
 		d.statusCode = codes.Code(code)
 	case "grpc-message":
-		d.statusDesc = grpcMessageDecode(f.Value)
+		d.statusDesc = decodeGrpcMessage(f.Value)
 	case "grpc-timeout":
 		d.timeoutSet = true
 		var err error
-		d.timeout, err = timeoutDecode(f.Value)
+		d.timeout, err = decodeTimeout(f.Value)
 		if err != nil {
 			d.setErr(StreamErrorf(codes.Internal, "transport: malformed time-out: %v", err))
 			return
@@ -251,7 +252,7 @@ func div(d, r time.Duration) int64 {
 }
 
 // TODO(zhaoq): It is the simplistic and not bandwidth efficient. Improve it.
-func timeoutEncode(t time.Duration) string {
+func encodeTimeout(t time.Duration) string {
 	if d := div(t, time.Nanosecond); d <= maxTimeoutValue {
 		return strconv.FormatInt(d, 10) + "n"
 	}
@@ -271,7 +272,7 @@ func timeoutEncode(t time.Duration) string {
 	return strconv.FormatInt(div(t, time.Hour), 10) + "H"
 }
 
-func timeoutDecode(s string) (time.Duration, error) {
+func decodeTimeout(s string) (time.Duration, error) {
 	size := len(s)
 	if size < 2 {
 		return 0, fmt.Errorf("transport: timeout string is too short: %q", s)
@@ -288,6 +289,80 @@ func timeoutDecode(s string) (time.Duration, error) {
 	return d * time.Duration(t), nil
 }
 
+const (
+	spaceByte   = ' '
+	tildaByte   = '~'
+	percentByte = '%'
+)
+
+// encodeGrpcMessage is used to encode status code in header field
+// "grpc-message".
+// It checks to see if each individual byte in msg is an
+// allowable byte, and then either percent encoding or passing it through.
+// When percent encoding, the byte is converted into hexadecimal notation
+// with a '%' prepended.
+func encodeGrpcMessage(msg string) string {
+	if msg == "" {
+		return ""
+	}
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		c := msg[i]
+		if !(c >= spaceByte && c < tildaByte && c != percentByte) {
+			return encodeGrpcMessageUnchecked(msg)
+		}
+	}
+	return msg
+}
+
+func encodeGrpcMessageUnchecked(msg string) string {
+	var buf bytes.Buffer
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		c := msg[i]
+		if c >= spaceByte && c < tildaByte && c != percentByte {
+			buf.WriteByte(c)
+		} else {
+			buf.WriteString(fmt.Sprintf("%%%02X", c))
+		}
+	}
+	return buf.String()
+}
+
+// decodeGrpcMessage decodes the msg encoded by encodeGrpcMessage.
+func decodeGrpcMessage(msg string) string {
+	if msg == "" {
+		return ""
+	}
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		if msg[i] == percentByte && i+2 < lenMsg {
+			return decodeGrpcMessageUnchecked(msg)
+		}
+	}
+	return msg
+}
+
+func decodeGrpcMessageUnchecked(msg string) string {
+	var buf bytes.Buffer
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		c := msg[i]
+		if c == percentByte && i+2 < lenMsg {
+			parsed, err := strconv.ParseInt(msg[i+1:i+3], 16, 8)
+			if err != nil {
+				buf.WriteByte(c)
+			} else {
+				buf.WriteByte(byte(parsed))
+				i += 2
+			}
+		} else {
+			buf.WriteByte(c)
+		}
+	}
+	return buf.String()
+}
+
 type framer struct {
 	numWriters int32
 	reader     io.Reader

transport/http_util_test.go

@@ -59,7 +59,7 @@ func TestTimeoutEncode(t *testing.T) {
 		if err != nil {
 			t.Fatalf("failed to parse duration string %s: %v", test.in, err)
 		}
-		out := timeoutEncode(d)
+		out := encodeTimeout(d)
 		if out != test.out {
 			t.Fatalf("timeoutEncode(%s) = %s, want %s", test.in, out, test.out)
 		}
@@ -79,7 +79,7 @@ func TestTimeoutDecode(t *testing.T) {
 		{"1", 0, fmt.Errorf("transport: timeout string is too short: %q", "1")},
 		{"", 0, fmt.Errorf("transport: timeout string is too short: %q", "")},
 	} {
-		d, err := timeoutDecode(test.s)
+		d, err := decodeTimeout(test.s)
 		if d != test.d || fmt.Sprint(err) != fmt.Sprint(test.err) {
 			t.Fatalf("timeoutDecode(%q) = %d, %v, want %d, %v", test.s, int64(d), err, int64(test.d), test.err)
 		}
@@ -107,3 +107,38 @@ func TestValidContentType(t *testing.T) {
 		}
 	}
 }
+
+func TestEncodeGrpcMessage(t *testing.T) {
+	for _, tt := range []struct {
+		input    string
+		expected string
+	}{
+		{"", ""},
+		{"Hello", "Hello"},
+		{"my favorite character is \u0000", "my favorite character is %00"},
+		{"my favorite character is %", "my favorite character is %25"},
+	} {
+		actual := encodeGrpcMessage(tt.input)
+		if tt.expected != actual {
+			t.Errorf("encodeGrpcMessage(%v) = %v, want %v", tt.input, actual, tt.expected)
+		}
+	}
+}
+
+func TestDecodeGrpcMessage(t *testing.T) {
+	for _, tt := range []struct {
+		input    string
+		expected string
+	}{
+		{"", ""},
+		{"Hello", "Hello"},
+		{"H%61o", "Hao"},
+		{"H%6", "H%6"},
+		{"%G0", "%G0"},
+	} {
+		actual := decodeGrpcMessage(tt.input)
+		if tt.expected != actual {
+			t.Errorf("dncodeGrpcMessage(%v) = %v, want %v", tt.input, actual, tt.expected)
+		}
+	}
+}

transport/pre_go16.go

@@ -0,0 +1,45 @@
+// +build !go1.6
+
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"net"
+	"time"
+)
+
+// newDialer constructs a net.Dialer.
+func newDialer(timeout time.Duration, _ <-chan struct{}) *net.Dialer {
+	return &net.Dialer{Timeout: timeout}
+}

transport/transport.go

@@ -43,7 +43,6 @@ import (
 	"fmt"
 	"io"
 	"net"
-	"strconv"
 	"sync"
 	"time"
 
@@ -354,8 +353,10 @@ func NewServerTransport(protocol string, conn net.Conn, maxStreams uint32, authI
 type ConnectOptions struct {
 	// UserAgent is the application user agent.
 	UserAgent string
+	// Cancel is closed to indicate that dialing should be cancelled.
+	Cancel chan struct{}
 	// Dialer specifies how to dial a network address.
-	Dialer func(string, time.Duration) (net.Conn, error)
+	Dialer func(string, time.Duration, <-chan struct{}) (net.Conn, error)
 	// PerRPCCredentials stores the PerRPCCredentials required to issue RPCs.
 	PerRPCCredentials []credentials.PerRPCCredentials
 	// TransportCredentials stores the Authenticator required to setup a client connection.
@@ -366,7 +367,7 @@ type ConnectOptions struct {
 
 // NewClientTransport establishes the transport with the required ConnectOptions
 // and returns it to the caller.
-func NewClientTransport(target string, opts *ConnectOptions) (ClientTransport, error) {
+func NewClientTransport(target string, opts ConnectOptions) (ClientTransport, error) {
 	return newHTTP2Client(target, opts)
 }
 
@@ -559,74 +560,3 @@ func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-
 		return i, nil
 	}
 }
-
-const (
-	spaceByte   = ' '
-	tildaByte   = '~'
-	percentByte = '%'
-)
-
-// grpcMessageEncode encodes the grpc-message field in the same
-// manner as https://github.com/grpc/grpc-java/pull/1517.
-func grpcMessageEncode(msg string) string {
-	if msg == "" {
-		return ""
-	}
-	lenMsg := len(msg)
-	for i := 0; i < lenMsg; i++ {
-		c := msg[i]
-		if !(c >= spaceByte && c < tildaByte && c != percentByte) {
-			return grpcMessageEncodeUnchecked(msg)
-		}
-	}
-	return msg
-}
-
-func grpcMessageEncodeUnchecked(msg string) string {
-	var buf bytes.Buffer
-	lenMsg := len(msg)
-	for i := 0; i < lenMsg; i++ {
-		c := msg[i]
-		if c >= spaceByte && c < tildaByte && c != percentByte {
-			_ = buf.WriteByte(c)
-		} else {
-			_, _ = buf.WriteString(fmt.Sprintf("%%%02X", c))
-		}
-	}
-	return buf.String()
-}
-
-// grpcMessageDecode decodes the grpc-message field in the same
-// manner as https://github.com/grpc/grpc-java/pull/1517.
-func grpcMessageDecode(msg string) string {
-	if msg == "" {
-		return ""
-	}
-	lenMsg := len(msg)
-	for i := 0; i < lenMsg; i++ {
-		if msg[i] == percentByte && i+2 < lenMsg {
-			return grpcMessageDecodeUnchecked(msg)
-		}
-	}
-	return msg
-}
-
-func grpcMessageDecodeUnchecked(msg string) string {
-	var buf bytes.Buffer
-	lenMsg := len(msg)
-	for i := 0; i < lenMsg; i++ {
-		c := msg[i]
-		if c == percentByte && i+2 < lenMsg {
-			parsed, err := strconv.ParseInt(msg[i+1:i+3], 16, 8)
-			if err != nil {
-				_ = buf.WriteByte(c)
-			} else {
-				_ = buf.WriteByte(byte(parsed))
-				i += 2
-			}
-		} else {
-			_ = buf.WriteByte(c)
-		}
-	}
-	return buf.String()
-}

transport/transport_test.go

@@ -37,7 +37,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math"
 	"net"
 	"reflect"
@@ -131,7 +130,7 @@ func (h *testStreamHandler) handleStreamMisbehave(t *testing.T, s *Stream) {
 
 func (h *testStreamHandler) handleStreamEncodingRequiredStatus(t *testing.T, s *Stream) {
 	// raw newline is not accepted by http2 framer so it must be encoded.
-	h.t.WriteStatus(s, codes.Internal, "\n")
+	h.t.WriteStatus(s, encodingTestStatusCode, encodingTestStatusDesc)
 }
 
 // start starts server. Other goroutines should block on s.readyChan for further operations.
@@ -221,7 +220,7 @@ func setUp(t *testing.T, port int, maxStreams uint32, ht hType) (*server, Client
 		ct      ClientTransport
 		connErr error
 	)
-	ct, connErr = NewClientTransport(addr, &ConnectOptions{})
+	ct, connErr = NewClientTransport(addr, ConnectOptions{})
 	if connErr != nil {
 		t.Fatalf("failed to create transport: %v", connErr)
 	}
@@ -714,6 +713,11 @@ func TestClientWithMisbehavedServer(t *testing.T) {
 	server.stop()
 }
 
+var (
+	encodingTestStatusCode = codes.Internal
+	encodingTestStatusDesc = "\n"
+)
+
 func TestEncodingRequiredStatus(t *testing.T) {
 	server, ct := setUp(t, 0, math.MaxUint32, encodingRequiredStatus)
 	callHdr := &CallHdr{
@@ -731,8 +735,12 @@ func TestEncodingRequiredStatus(t *testing.T) {
 	if err := ct.Write(s, expectedRequest, &opts); err != nil {
 		t.Fatalf("Failed to write the request: %v", err)
 	}
-	if _, err = ioutil.ReadAll(s); err != nil {
+	p := make([]byte, http2MaxFrameLen)
-		t.Fatal(err)
+	if _, err := s.dec.Read(p); err != io.EOF {
+		t.Fatalf("Read got error %v, want %v", err, io.EOF)
+	}
+	if s.StatusCode() != encodingTestStatusCode || s.StatusDesc() != encodingTestStatusDesc {
+		t.Fatalf("stream with status code %d, status desc %v, want %d, %v", s.StatusCode(), s.StatusDesc(), encodingTestStatusCode, encodingTestStatusDesc)
 	}
 	ct.Close()
 	server.stop()
@@ -769,29 +777,3 @@ func TestIsReservedHeader(t *testing.T) {
 		}
 	}
 }
-
-func TestGrpcMessageEncode(t *testing.T) {
-	testGrpcMessageEncode(t, "my favorite character is \u0000", "my favorite character is %00")
-	testGrpcMessageEncode(t, "my favorite character is %", "my favorite character is %25")
-}
-
-func TestGrpcMessageDecode(t *testing.T) {
-	testGrpcMessageDecode(t, "Hello", "Hello")
-	testGrpcMessageDecode(t, "H%61o", "Hao")
-	testGrpcMessageDecode(t, "H%6", "H%6")
-	testGrpcMessageDecode(t, "%G0", "%G0")
-}
-
-func testGrpcMessageEncode(t *testing.T, input string, expected string) {
-	actual := grpcMessageEncode(input)
-	if expected != actual {
-		t.Errorf("Expected %s from grpcMessageEncode, got %s", expected, actual)
-	}
-}
-
-func testGrpcMessageDecode(t *testing.T, input string, expected string) {
-	actual := grpcMessageDecode(input)
-	if expected != actual {
-		t.Errorf("Expected %s from grpcMessageDecode, got %s", expected, actual)
-	}
-}