// Serve accepts incoming connections on the listener lis, creating a new
// ServerTransport and service goroutine for each. The service goroutines
// read gRPC request and then call the registered handlers to reply to them.
// Service returns when lis.Accept fails.
func (s *Server) Serve(lis net.Listener) error {
s.mu.Lock()
if s.lis == nil {
s.mu.Unlock()
return ErrServerStopped
}
s.lis[lis] = true
s.mu.Unlock()
defer func() {
lis.Close()
s.mu.Lock()
delete(s.lis, lis)
s.mu.Unlock()
}()
for {
c, err := lis.Accept()
if err != nil {
return err
}
var authInfo credentials.AuthInfo
if creds, ok := s.opts.creds.(credentials.TransportAuthenticator); ok {
c, authInfo, err = creds.ServerHandshake(c)
if err != nil {
grpclog.Println("grpc: Server.Serve failed to complete security handshake.")
continue
}
}
s.mu.Lock()
if s.conns == nil {
s.mu.Unlock()
c.Close()
return nil
}
st, err := transport.NewServerTransport("http2", c, s.opts.maxConcurrentStreams, authInfo)
if err != nil {
s.mu.Unlock()
c.Close()
grpclog.Println("grpc: Server.Serve failed to create ServerTransport: ", err)
continue
}
s.conns[st] = true
s.mu.Unlock()
go func() {
st.HandleStreams(func(stream *transport.Stream) {
s.handleStream(st, stream)
})
s.mu.Lock()
delete(s.conns, st)
s.mu.Unlock()
}()
}
}
func doClientStreaming(tc testpb.TestServiceClient) {
stream, err := tc.StreamingInputCall(context.Background())
if err != nil {
grpclog.Fatalf("%v.StreamingInputCall(_) = _, %v", tc, err)
}
var sum int
for _, s := range reqSizes {
pl := newPayload(testpb.PayloadType_COMPRESSABLE, s)
req := &testpb.StreamingInputCallRequest{
Payload: pl,
}
if err := stream.Send(req); err != nil {
grpclog.Fatalf("%v.Send(%v) = %v", stream, req, err)
}
sum += s
grpclog.Printf("Sent a request of size %d, aggregated size %d", s, sum)
}
reply, err := stream.CloseAndRecv()
if err != nil {
grpclog.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
}
if reply.GetAggregatedPayloadSize() != int32(sum) {
grpclog.Fatalf("%v.CloseAndRecv().GetAggregatePayloadSize() = %v; want %v", stream, reply.GetAggregatedPayloadSize(), sum)
}
grpclog.Println("ClientStreaming done")
}
func doPerRPCCreds(tc testpb.TestServiceClient) {
jsonKey := getServiceAccountJSONKey()
pl := newPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
req := &testpb.SimpleRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseSize: proto.Int32(int32(largeRespSize)),
Payload: pl,
FillUsername: proto.Bool(true),
FillOauthScope: proto.Bool(true),
}
token := getToken()
kv := map[string]string{"authorization": token.TokenType + " " + token.AccessToken}
ctx := metadata.NewContext(context.Background(), metadata.MD{"authorization": []string{kv["authorization"]}})
reply, err := tc.UnaryCall(ctx, req)
if err != nil {
grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
}
user := reply.GetUsername()
scope := reply.GetOauthScope()
if !strings.Contains(string(jsonKey), user) {
grpclog.Fatalf("Got user name %q which is NOT a substring of %q.", user, jsonKey)
}
if !strings.Contains(*oauthScope, scope) {
grpclog.Fatalf("Got OAuth scope %q which is NOT a substring of %q.", scope, *oauthScope)
}
grpclog.Println("PerRPCCreds done")
}
func doCancelAfterFirstResponse(tc testpb.TestServiceClient) {
ctx, cancel := context.WithCancel(context.Background())
stream, err := tc.FullDuplexCall(ctx)
if err != nil {
grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
}
respParam := []*testpb.ResponseParameters{
{
Size: proto.Int32(31415),
},
}
pl := newPayload(testpb.PayloadType_COMPRESSABLE, 27182)
req := &testpb.StreamingOutputCallRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseParameters: respParam,
Payload: pl,
}
if err := stream.Send(req); err != nil {
grpclog.Fatalf("%v.Send(%v) = %v", stream, req, err)
}
if _, err := stream.Recv(); err != nil {
grpclog.Fatalf("%v.Recv() = %v", stream, err)
}
cancel()
if _, err := stream.Recv(); grpc.Code(err) != codes.Canceled {
grpclog.Fatalf("%v compleled with error code %d, want %d", stream, grpc.Code(err), codes.Canceled)
}
grpclog.Println("CancelAfterFirstResponse done")
}
func main() {
flag.Parse()
go func() {
lis, err := net.Listen("tcp", ":0")
if err != nil {
grpclog.Fatalf("Failed to listen: %v", err)
}
grpclog.Println("Server profiling address: ", lis.Addr().String())
if err := http.Serve(lis, nil); err != nil {
grpclog.Fatalf("Failed to serve: %v", err)
}
}()
addr, stopper := benchmark.StartServer(":0") // listen on all interfaces
grpclog.Println("Server Address: ", addr)
<-time.After(time.Duration(*duration) * time.Second)
stopper()
}
// printFeature gets the feature for the given point.
func printFeature(client pb.RouteGuideClient, point *pb.Point) {
grpclog.Printf("Getting feature for point (%d, %d)", point.Latitude, point.Longitude)
feature, err := client.GetFeature(context.Background(), point)
if err != nil {
grpclog.Fatalf("%v.GetFeatures(_) = _, %v: ", client, err)
}
grpclog.Println(feature)
}
func doEmptyUnaryCall(tc testpb.TestServiceClient) {
reply, err := tc.EmptyCall(context.Background(), &testpb.Empty{})
if err != nil {
grpclog.Fatal("/TestService/EmptyCall RPC failed: ", err)
}
if !proto.Equal(&testpb.Empty{}, reply) {
grpclog.Fatalf("/TestService/EmptyCall receives %v, want %v", reply, testpb.Empty{})
}
grpclog.Println("EmptyUnaryCall done")
}
func doCancelAfterBegin(tc testpb.TestServiceClient) {
ctx, cancel := context.WithCancel(metadata.NewContext(context.Background(), testMetadata))
stream, err := tc.StreamingInputCall(ctx)
if err != nil {
grpclog.Fatalf("%v.StreamingInputCall(_) = _, %v", tc, err)
}
cancel()
_, err = stream.CloseAndRecv()
if grpc.Code(err) != codes.Canceled {
grpclog.Fatalf("%v.CloseAndRecv() got error code %d, want %d", stream, grpc.Code(err), codes.Canceled)
}
grpclog.Println("CancelAfterBegin done")
}
func doEmptyStream(tc testpb.TestServiceClient) {
stream, err := tc.FullDuplexCall(context.Background())
if err != nil {
grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
}
if err := stream.CloseSend(); err != nil {
grpclog.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
}
if _, err := stream.Recv(); err != io.EOF {
grpclog.Fatalf("%v failed to complete the empty stream test: %v", stream, err)
}
grpclog.Println("Emptystream done")
}
func doTimeoutOnSleepingServer(tc testpb.TestServiceClient) {
ctx, _ := context.WithTimeout(context.Background(), 1*time.Millisecond)
stream, err := tc.FullDuplexCall(ctx)
if err != nil {
if grpc.Code(err) == codes.DeadlineExceeded {
grpclog.Println("TimeoutOnSleepingServer done")
return
}
grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
}
pl := newPayload(testpb.PayloadType_COMPRESSABLE, 27182)
req := &testpb.StreamingOutputCallRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
Payload: pl,
}
if err := stream.Send(req); err != nil {
grpclog.Fatalf("%v.Send(%v) = %v", stream, req, err)
}
if _, err := stream.Recv(); grpc.Code(err) != codes.DeadlineExceeded {
grpclog.Fatalf("%v.Recv() = _, %v, want error code %d", stream, err, codes.DeadlineExceeded)
}
grpclog.Println("TimeoutOnSleepingServer done")
}
func closeLoopStream() {
s, conn, tc := buildConnection()
ch := make(chan int, *maxConcurrentRPCs*4)
var (
mu sync.Mutex
wg sync.WaitGroup
)
wg.Add(*maxConcurrentRPCs)
// Distribute RPCs over maxConcurrentCalls workers.
for i := 0; i < *maxConcurrentRPCs; i++ {
go func() {
stream, err := tc.StreamingCall(context.Background())
if err != nil {
grpclog.Fatalf("%v.StreamingCall(_) = _, %v", tc, err)
}
// Do some warm up.
for i := 0; i < 100; i++ {
streamCaller(tc, stream)
}
for range ch {
start := time.Now()
streamCaller(tc, stream)
elapse := time.Since(start)
mu.Lock()
s.Add(elapse)
mu.Unlock()
}
wg.Done()
}()
}
// Stop the client when time is up.
done := make(chan struct{})
go func() {
<-time.After(time.Duration(*duration) * time.Second)
close(done)
}()
ok := true
for ok {
select {
case ch <- 0:
case <-done:
ok = false
}
}
close(ch)
wg.Wait()
conn.Close()
grpclog.Println(s.String())
}
func closeLoopUnary() {
s, conn, tc := buildConnection()
for i := 0; i < 100; i++ {
unaryCaller(tc)
}
ch := make(chan int, *maxConcurrentRPCs*4)
var (
mu sync.Mutex
wg sync.WaitGroup
)
wg.Add(*maxConcurrentRPCs)
for i := 0; i < *maxConcurrentRPCs; i++ {
go func() {
for _ = range ch {
start := time.Now()
unaryCaller(tc)
elapse := time.Since(start)
mu.Lock()
s.Add(elapse)
mu.Unlock()
}
wg.Done()
}()
}
// Stop the client when time is up.
done := make(chan struct{})
go func() {
<-time.After(time.Duration(*duration) * time.Second)
close(done)
}()
ok := true
for ok {
select {
case ch <- 0:
case <-done:
ok = false
}
}
close(ch)
wg.Wait()
conn.Close()
grpclog.Println(s.String())
}
// printFeatures lists all the features within the given bounding Rectangle.
func printFeatures(client pb.RouteGuideClient, rect *pb.Rectangle) {
grpclog.Printf("Looking for features within %v", rect)
stream, err := client.ListFeatures(context.Background(), rect)
if err != nil {
grpclog.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
}
for {
feature, err := stream.Recv()
if err == io.EOF {
break
}
if err != nil {
grpclog.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
}
grpclog.Println(feature)
}
}
func doLargeUnaryCall(tc testpb.TestServiceClient) {
pl := newPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
req := &testpb.SimpleRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseSize: proto.Int32(int32(largeRespSize)),
Payload: pl,
}
reply, err := tc.UnaryCall(context.Background(), req)
if err != nil {
grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
}
t := reply.GetPayload().GetType()
s := len(reply.GetPayload().GetBody())
if t != testpb.PayloadType_COMPRESSABLE || s != largeRespSize {
grpclog.Fatalf("Got the reply with type %d len %d; want %d, %d", t, s, testpb.PayloadType_COMPRESSABLE, largeRespSize)
}
grpclog.Println("LargeUnaryCall done")
}
// processUpdates calls Watcher.Next() once and processes the obtained updates.
func (p *unicastNamingPicker) processUpdates() error {
updates, err := p.watcher.Next()
if err != nil {
return err
}
for _, update := range updates {
switch update.Op {
case naming.Add:
p.mu.Lock()
p.addrs.PushBack(&addrInfo{
addr: update.Addr,
})
p.mu.Unlock()
// Initial connection setup
if p.conn == nil {
conn, err := NewConn(p.cc)
if err != nil {
return err
}
p.conn = conn
}
case naming.Delete:
p.mu.Lock()
for e := p.addrs.Front(); e != nil; e = e.Next() {
if update.Addr == e.Value.(*addrInfo).addr {
if e == p.pickedAddr {
// Do not remove the element now if it is the current picked
// one. We leave the deletion to the next PickAddr() call.
e.Value.(*addrInfo).deleting = true
// Notify Conn to close it. All the live RPCs on this connection
// will be aborted.
p.conn.NotifyReset()
} else {
p.addrs.Remove(e)
}
}
}
p.mu.Unlock()
default:
grpclog.Println("Unknown update.Op ", update.Op)
}
}
return nil
}
func doServerStreaming(tc testpb.TestServiceClient) {
respParam := make([]*testpb.ResponseParameters, len(respSizes))
for i, s := range respSizes {
respParam[i] = &testpb.ResponseParameters{
Size: proto.Int32(int32(s)),
}
}
req := &testpb.StreamingOutputCallRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseParameters: respParam,
}
stream, err := tc.StreamingOutputCall(context.Background(), req)
if err != nil {
grpclog.Fatalf("%v.StreamingOutputCall(_) = _, %v", tc, err)
}
var rpcStatus error
var respCnt int
var index int
for {
reply, err := stream.Recv()
if err != nil {
rpcStatus = err
break
}
t := reply.GetPayload().GetType()
if t != testpb.PayloadType_COMPRESSABLE {
grpclog.Fatalf("Got the reply of type %d, want %d", t, testpb.PayloadType_COMPRESSABLE)
}
size := len(reply.GetPayload().GetBody())
if size != int(respSizes[index]) {
grpclog.Fatalf("Got reply body of length %d, want %d", size, respSizes[index])
}
index++
respCnt++
}
if rpcStatus != io.EOF {
grpclog.Fatalf("Failed to finish the server streaming rpc: %v", err)
}
if respCnt != len(respSizes) {
grpclog.Fatalf("Got %d reply, want %d", len(respSizes), respCnt)
}
grpclog.Println("ServerStreaming done")
}
func doJWTTokenCreds(tc testpb.TestServiceClient) {
pl := newPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
req := &testpb.SimpleRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseSize: proto.Int32(int32(largeRespSize)),
Payload: pl,
FillUsername: proto.Bool(true),
}
reply, err := tc.UnaryCall(context.Background(), req)
if err != nil {
grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
}
jsonKey := getServiceAccountJSONKey()
user := reply.GetUsername()
if !strings.Contains(string(jsonKey), user) {
grpclog.Fatalf("Got user name %q which is NOT a substring of %q.", user, jsonKey)
}
grpclog.Println("JWTtokenCreds done")
}
func doPingPong(tc testpb.TestServiceClient) {
stream, err := tc.FullDuplexCall(context.Background())
if err != nil {
grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
}
var index int
for index < len(reqSizes) {
respParam := []*testpb.ResponseParameters{
{
Size: proto.Int32(int32(respSizes[index])),
},
}
pl := newPayload(testpb.PayloadType_COMPRESSABLE, reqSizes[index])
req := &testpb.StreamingOutputCallRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseParameters: respParam,
Payload: pl,
}
if err := stream.Send(req); err != nil {
grpclog.Fatalf("%v.Send(%v) = %v", stream, req, err)
}
reply, err := stream.Recv()
if err != nil {
grpclog.Fatalf("%v.Recv() = %v", stream, err)
}
t := reply.GetPayload().GetType()
if t != testpb.PayloadType_COMPRESSABLE {
grpclog.Fatalf("Got the reply of type %d, want %d", t, testpb.PayloadType_COMPRESSABLE)
}
size := len(reply.GetPayload().GetBody())
if size != int(respSizes[index]) {
grpclog.Fatalf("Got reply body of length %d, want %d", size, respSizes[index])
}
index++
}
if err := stream.CloseSend(); err != nil {
grpclog.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
}
if _, err := stream.Recv(); err != io.EOF {
grpclog.Fatalf("%v failed to complele the ping pong test: %v", stream, err)
}
grpclog.Println("Pingpong done")
}
func main() {
flag.Parse()
grpc.EnableTracing = *trace
go func() {
lis, err := net.Listen("tcp", ":0")
if err != nil {
grpclog.Fatalf("Failed to listen: %v", err)
}
grpclog.Println("Client profiling address: ", lis.Addr().String())
if err := http.Serve(lis, nil); err != nil {
grpclog.Fatalf("Failed to serve: %v", err)
}
}()
switch *rpcType {
case 0:
closeLoopUnary()
case 1:
closeLoopStream()
}
}
func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) {
s, ok := t.getStream(f)
if !ok {
return
}
s.mu.Lock()
if s.state == streamDone {
s.mu.Unlock()
return
}
s.state = streamDone
if !s.headerDone {
close(s.headerChan)
s.headerDone = true
}
s.statusCode, ok = http2RSTErrConvTab[http2.ErrCode(f.ErrCode)]
if !ok {
grpclog.Println("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error ", f.ErrCode)
}
s.mu.Unlock()
s.write(recvMsg{err: io.EOF})
}
func doComputeEngineCreds(tc testpb.TestServiceClient) {
pl := newPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
req := &testpb.SimpleRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseSize: proto.Int32(int32(largeRespSize)),
Payload: pl,
FillUsername: proto.Bool(true),
FillOauthScope: proto.Bool(true),
}
reply, err := tc.UnaryCall(context.Background(), req)
if err != nil {
grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
}
user := reply.GetUsername()
scope := reply.GetOauthScope()
if user != *defaultServiceAccount {
grpclog.Fatalf("Got user name %q, want %q.", user, *defaultServiceAccount)
}
if !strings.Contains(*oauthScope, scope) {
grpclog.Fatalf("Got OAuth scope %q which is NOT a substring of %q.", scope, *oauthScope)
}
grpclog.Println("ComputeEngineCreds done")
}
// Serve accepts incoming connections on the listener lis, creating a new
// ServerTransport and service goroutine for each. The service goroutines
// read gRPC request and then call the registered handlers to reply to them.
// Service returns when lis.Accept fails.
func (s *Server) Serve(lis net.Listener) error {
s.mu.Lock()
s.printf("serving")
if s.lis == nil {
s.mu.Unlock()
return ErrServerStopped
}
s.lis[lis] = true
s.mu.Unlock()
defer func() {
lis.Close()
s.mu.Lock()
delete(s.lis, lis)
s.mu.Unlock()
}()
for {
c, err := lis.Accept()
if err != nil {
s.mu.Lock()
s.printf("done serving; Accept = %v", err)
s.mu.Unlock()
return err
}
var authInfo credentials.AuthInfo
if creds, ok := s.opts.creds.(credentials.TransportAuthenticator); ok {
var conn net.Conn
conn, authInfo, err = creds.ServerHandshake(c)
if err != nil {
s.mu.Lock()
s.errorf("ServerHandshake(%q) failed: %v", c.RemoteAddr(), err)
s.mu.Unlock()
grpclog.Println("grpc: Server.Serve failed to complete security handshake.")
continue
}
c = conn
}
s.mu.Lock()
if s.conns == nil {
s.mu.Unlock()
c.Close()
return nil
}
st, err := transport.NewServerTransport("http2", c, s.opts.maxConcurrentStreams, authInfo)
if err != nil {
s.errorf("NewServerTransport(%q) failed: %v", c.RemoteAddr(), err)
s.mu.Unlock()
c.Close()
grpclog.Println("grpc: Server.Serve failed to create ServerTransport: ", err)
continue
}
s.conns[st] = true
s.mu.Unlock()
go func() {
var wg sync.WaitGroup
st.HandleStreams(func(stream *transport.Stream) {
var trInfo *traceInfo
if EnableTracing {
trInfo = &traceInfo{
tr: trace.New("grpc.Recv."+methodFamily(stream.Method()), stream.Method()),
}
trInfo.firstLine.client = false
trInfo.firstLine.remoteAddr = st.RemoteAddr()
stream.TraceContext(trInfo.tr)
if dl, ok := stream.Context().Deadline(); ok {
trInfo.firstLine.deadline = dl.Sub(time.Now())
}
}
wg.Add(1)
go func() {
s.handleStream(st, stream, trInfo)
wg.Done()
}()
})
wg.Wait()
s.mu.Lock()
delete(s.conns, st)
s.mu.Unlock()
}()
}
}
// HandleStreams receives incoming streams using the given handler. This is
// typically run in a separate goroutine.
func (t *http2Server) HandleStreams(handle func(*Stream)) {
// Check the validity of client preface.
preface := make([]byte, len(clientPreface))
if _, err := io.ReadFull(t.conn, preface); err != nil {
grpclog.Printf("transport: http2Server.HandleStreams failed to receive the preface from client: %v", err)
t.Close()
return
}
if !bytes.Equal(preface, clientPreface) {
grpclog.Printf("transport: http2Server.HandleStreams received bogus greeting from client: %q", preface)
t.Close()
return
}
frame, err := t.framer.readFrame()
if err != nil {
grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err)
t.Close()
return
}
sf, ok := frame.(*http2.SettingsFrame)
if !ok {
grpclog.Printf("transport: http2Server.HandleStreams saw invalid preface type %T from client", frame)
t.Close()
return
}
t.handleSettings(sf)
hDec := newHPACKDecoder()
var curStream *Stream
var wg sync.WaitGroup
defer wg.Wait()
for {
frame, err := t.framer.readFrame()
if err != nil {
t.Close()
return
}
switch frame := frame.(type) {
case *http2.HeadersFrame:
id := frame.Header().StreamID
if id%2 != 1 || id <= t.maxStreamID {
// illegal gRPC stream id.
grpclog.Println("transport: http2Server.HandleStreams received an illegal stream id: ", id)
t.Close()
break
}
t.maxStreamID = id
buf := newRecvBuffer()
fc := &inFlow{
limit: initialWindowSize,
conn: t.fc,
}
curStream = &Stream{
id: frame.Header().StreamID,
st: t,
buf: buf,
fc: fc,
}
endStream := frame.Header().Flags.Has(http2.FlagHeadersEndStream)
curStream = t.operateHeaders(hDec, curStream, frame, endStream, handle, &wg)
case *http2.ContinuationFrame:
curStream = t.operateHeaders(hDec, curStream, frame, false, handle, &wg)
case *http2.DataFrame:
t.handleData(frame)
case *http2.RSTStreamFrame:
t.handleRSTStream(frame)
case *http2.SettingsFrame:
t.handleSettings(frame)
case *http2.PingFrame:
t.handlePing(frame)
case *http2.WindowUpdateFrame:
t.handleWindowUpdate(frame)
case *http2.GoAwayFrame:
break
default:
grpclog.Printf("transport: http2Server.HandleStreams found unhandled frame type %v.", frame)
}
}
}