diff --git a/examples/route_guide/README.md b/examples/route_guide/README.md new file mode 100644 index 00000000..0ca747f3 --- /dev/null +++ b/examples/route_guide/README.md @@ -0,0 +1,22 @@ +# Description +The route guide server and client demonstrates how to use grpc go libraries to +perform unary, client streaming, server streaming and full duplex RPCs. + +See the definition of the route guide service in route_guide.proto. + +# Run the sample code +To compile and run the server, assuming you are in the root of the route_guide +folder, i.e., .../examples/route_guide/, simply: + +`go run server/server.go` + +Likewise, to run the client: + +`go run client/client.go` + +# Optional command line flags +The server and client both take optional command line flags. For example, the +client and server run without TLS by default. To enable TSL: + +`go run server/server.go -use_tls=true` +`go run client/client.go -use_tls=true` diff --git a/examples/route_guide/client/client.go b/examples/route_guide/client/client.go new file mode 100644 index 00000000..f0b09d22 --- /dev/null +++ b/examples/route_guide/client/client.go @@ -0,0 +1,203 @@ +/* + * + * Copyright 2015, 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 main + +import ( + "flag" + "io" + "log" + "math/rand" + "net" + "strconv" + "time" + + pb "github.com/wonderfly/grpc-go/examples/route_guide" + "golang.org/x/net/context" + "google.golang.org/grpc" + "google.golang.org/grpc/credentials" +) + +var ( + useTLS = flag.Bool("use_tls", false, "Connection uses TLS if true, else plain TCP") + caFile = flag.String("tls_ca_file", "testdata/ca.pem", "The file containning the CA root cert file") + serverHost = flag.String("server_host", "127.0.0.1", "The server host name") + serverPort = flag.Int("server_port", 10000, "The server port number") + tlsServerName = flag.String("tls_server_name", "x.test.youtube.com", "The server name use to verify the hostname returned by TLS handshake") +) + +// doGetFeature gets the feature for the given point. +func doGetFeature(client pb.RouteGuideClient, point *pb.Point) { + log.Printf("Getting feature for point (%d, %d)", point.Latitude, point.Longitude) + reply, err := client.GetFeature(context.Background(), point) + if err != nil { + log.Fatalf("%v.GetFeatures(_) = _, %v: ", client, err) + return + } + log.Println(reply) +} + +// doListFeatures lists all the features within the given bounding Rectangle. +func doListFeatures(client pb.RouteGuideClient, rect *pb.Rectangle) { + log.Printf("Looking for features within %v", rect) + stream, err := client.ListFeatures(context.Background(), rect) + if err != nil { + log.Fatalf("%v.ListFeatures(_) = _, %v", client, err) + } + var rpcStatus error + for { + reply, err := stream.Recv() + if err != nil { + rpcStatus = err + break + } + log.Println(reply) + } + if rpcStatus != io.EOF { + log.Fatalf("%v.ListFeatures(_) = _, %v", client, err) + } +} + +// doRecordRoute sends a sequence of points to server and expects to get a RouteSummary from server. +func doRecordRoute(client pb.RouteGuideClient) { + // Create a random number of random points + rand.Seed(time.Now().UnixNano()) + pointCount := rand.Int31n(100) + 2 // Tranverse at least two points + points := make([]*pb.Point, pointCount) + for i, _ := range points { + points[i] = randomPoint() + } + log.Printf("Traversing %d points.", len(points)) + stream, err := client.RecordRoute(context.Background()) + if err != nil { + log.Fatalf("%v.RecordRoute(_) = _, %v", client, err) + } + for _, point := range points { + if err := stream.Send(point); err != nil { + log.Fatalf("%v.Send(%v) = %v", stream, point, err) + } + } + reply, err := stream.CloseAndRecv() + if err != nil { + log.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil) + } + log.Printf("Route summary: %v\n", reply) +} + +// doRouteChat receives a sequence of route notes, while sending notes for various locations. +func doRouteChat(client pb.RouteGuideClient) { + notes := []*pb.RouteNote{ + &pb.RouteNote{&pb.Point{0, 1}, "First message"}, + &pb.RouteNote{&pb.Point{0, 2}, "Second message"}, + &pb.RouteNote{&pb.Point{0, 3}, "Third message"}, + &pb.RouteNote{&pb.Point{0, 1}, "Fourth message"}, + &pb.RouteNote{&pb.Point{0, 2}, "Fifth message"}, + &pb.RouteNote{&pb.Point{0, 3}, "Sixth message"}, + } + stream, err := client.RouteChat(context.Background()) + if err != nil { + log.Fatalf("%v.RouteChat(_) = _, %v", client, err) + } + c := make(chan int) + go func() { + for { + in, err := stream.Recv() + if err == io.EOF { + // read done. + c <- 1 + return + } + if err != nil { + log.Fatalf("Failed to receive a note : %v\n", err) + } + log.Printf("Got message %s at point(%d, %d)\n", in.Message, in.Location.Latitude, in.Location.Longitude) + } + }() + for _, note := range notes { + if err := stream.Send(note); err != nil { + log.Fatalf("Failed to send a note: %v\n", err) + } + } + stream.CloseSend() + <-c +} + +func randomPoint() *pb.Point { + lat := (rand.Int31n(180) - 90) * 1e7 + long := (rand.Int31n(360) - 180) * 1e7 + return &pb.Point{lat, long} +} + +func main() { + flag.Parse() + serverAddr := net.JoinHostPort(*serverHost, strconv.Itoa(*serverPort)) + var opts []grpc.DialOption + if *useTLS { + var sn string + if *tlsServerName != "" { + sn = *tlsServerName + } + var creds credentials.TransportAuthenticator + if *caFile != "" { + var err error + creds, err = credentials.NewClientTLSFromFile(*caFile, sn) + if err != nil { + log.Fatalf("Failed to create TLS credentials %v", err) + } + } else { + creds = credentials.NewClientTLSFromCert(nil, sn) + } + opts = append(opts, grpc.WithClientTLS(creds)) + } + conn, err := grpc.Dial(serverAddr, opts...) + if err != nil { + log.Fatalf("fail to dial: %v", err) + } + defer conn.Close() + client := pb.NewRouteGuideClient(conn) + + // Looking for a valid feature + doGetFeature(client, &pb.Point{409146138, -746188906}) + + // Feature missing. + doGetFeature(client, &pb.Point{0, 0}) + + // Looking for features between 40, -75 and 42, -73. + doListFeatures(client, &pb.Rectangle{&pb.Point{400000000, -750000000}, &pb.Point{420000000, -730000000}}) + + // RecordRoute + doRecordRoute(client) + + // RouteChat + doRouteChat(client) +} diff --git a/examples/route_guide/route_guide.pb.go b/examples/route_guide/route_guide.pb.go new file mode 100644 index 00000000..765cf204 --- /dev/null +++ b/examples/route_guide/route_guide.pb.go @@ -0,0 +1,419 @@ +// Code generated by protoc-gen-go. +// source: route_guide.proto +// DO NOT EDIT! + +/* +Package route_guide is a generated protocol buffer package. + +It is generated from these files: + route_guide.proto + +It has these top-level messages: + Point + Rectangle + Feature + RouteNote + RouteSummary +*/ +package route_guide + +import proto "github.com/golang/protobuf/proto" + +import ( + context "golang.org/x/net/context" + grpc "google.golang.org/grpc" +) + +// Reference imports to suppress errors if they are not otherwise used. +var _ context.Context +var _ grpc.ClientConn + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal + +// Points are represented as latitude-longitude pairs in the E7 representation +// (degrees multiplied by 10**7 and rounded to the nearest integer). +// Latitudes should be in the range +/- 90 degrees and longitude should be in +// the range +/- 180 degrees (inclusive). +type Point struct { + Latitude int32 `protobuf:"varint,1,opt,name=latitude" json:"latitude,omitempty"` + Longitude int32 `protobuf:"varint,2,opt,name=longitude" json:"longitude,omitempty"` +} + +func (m *Point) Reset() { *m = Point{} } +func (m *Point) String() string { return proto.CompactTextString(m) } +func (*Point) ProtoMessage() {} + +// A latitude-longitude rectangle, represented as two diagonally opposite +// points "lo" and "hi". +type Rectangle struct { + // One corner of the rectangle. + Lo *Point `protobuf:"bytes,1,opt,name=lo" json:"lo,omitempty"` + // The other corner of the rectangle. + Hi *Point `protobuf:"bytes,2,opt,name=hi" json:"hi,omitempty"` +} + +func (m *Rectangle) Reset() { *m = Rectangle{} } +func (m *Rectangle) String() string { return proto.CompactTextString(m) } +func (*Rectangle) ProtoMessage() {} + +func (m *Rectangle) GetLo() *Point { + if m != nil { + return m.Lo + } + return nil +} + +func (m *Rectangle) GetHi() *Point { + if m != nil { + return m.Hi + } + return nil +} + +// A feature names something at a given point. +// +// If a feature could not be named, the name is empty. +type Feature struct { + // The name of the feature. + Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"` + // The point where the feature is detected. + Location *Point `protobuf:"bytes,2,opt,name=location" json:"location,omitempty"` +} + +func (m *Feature) Reset() { *m = Feature{} } +func (m *Feature) String() string { return proto.CompactTextString(m) } +func (*Feature) ProtoMessage() {} + +func (m *Feature) GetLocation() *Point { + if m != nil { + return m.Location + } + return nil +} + +// A RouteNote is a message sent while at a given point. +type RouteNote struct { + // The location from which the message is sent. + Location *Point `protobuf:"bytes,1,opt,name=location" json:"location,omitempty"` + // The message to be sent. + Message string `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"` +} + +func (m *RouteNote) Reset() { *m = RouteNote{} } +func (m *RouteNote) String() string { return proto.CompactTextString(m) } +func (*RouteNote) ProtoMessage() {} + +func (m *RouteNote) GetLocation() *Point { + if m != nil { + return m.Location + } + return nil +} + +// A RouteSummary is received in response to a RecordRoute rpc. +// +// It contains the number of individual points received, the number of +// detected features, and the total distance covered as the cumulative sum of +// the distance between each point. +type RouteSummary struct { + // The number of points received. + PointCount int32 `protobuf:"varint,1,opt,name=point_count" json:"point_count,omitempty"` + // The number of known features passed while traversing the route. + FeatureCount int32 `protobuf:"varint,2,opt,name=feature_count" json:"feature_count,omitempty"` + // The distance covered in metres. + Distance int32 `protobuf:"varint,3,opt,name=distance" json:"distance,omitempty"` + // The duration of the traversal in seconds. + ElapsedTime int32 `protobuf:"varint,4,opt,name=elapsed_time" json:"elapsed_time,omitempty"` +} + +func (m *RouteSummary) Reset() { *m = RouteSummary{} } +func (m *RouteSummary) String() string { return proto.CompactTextString(m) } +func (*RouteSummary) ProtoMessage() {} + +func init() { +} + +// Client API for RouteGuide service + +type RouteGuideClient interface { + // A simple RPC. + // + // Obtains the feature at a given position. + GetFeature(ctx context.Context, in *Point, opts ...grpc.CallOption) (*Feature, error) + // A server-to-client streaming RPC. + // + // Obtains the Features available within the given Rectangle. Results are + // streamed rather than returned at once (e.g. in a response message with a + // repeated field), as the rectangle may cover a large area and contain a + // huge number of features. + ListFeatures(ctx context.Context, in *Rectangle, opts ...grpc.CallOption) (RouteGuide_ListFeaturesClient, error) + // A client-to-server streaming RPC. + // + // Accepts a stream of Points on a route being traversed, returning a + // RouteSummary when traversal is completed. + RecordRoute(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RecordRouteClient, error) + // A Bidirectional streaming RPC. + // + // Accepts a stream of RouteNotes sent while a route is being traversed, + // while receiving other RouteNotes (e.g. from other users). + RouteChat(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RouteChatClient, error) +} + +type routeGuideClient struct { + cc *grpc.ClientConn +} + +func NewRouteGuideClient(cc *grpc.ClientConn) RouteGuideClient { + return &routeGuideClient{cc} +} + +func (c *routeGuideClient) GetFeature(ctx context.Context, in *Point, opts ...grpc.CallOption) (*Feature, error) { + out := new(Feature) + err := grpc.Invoke(ctx, "/route_guide.RouteGuide/GetFeature", in, out, c.cc, opts...) + if err != nil { + return nil, err + } + return out, nil +} + +func (c *routeGuideClient) ListFeatures(ctx context.Context, in *Rectangle, opts ...grpc.CallOption) (RouteGuide_ListFeaturesClient, error) { + stream, err := grpc.NewClientStream(ctx, &_RouteGuide_serviceDesc.Streams[0], c.cc, "/route_guide.RouteGuide/ListFeatures", opts...) + if err != nil { + return nil, err + } + x := &routeGuideListFeaturesClient{stream} + if err := x.ClientStream.SendProto(in); err != nil { + return nil, err + } + if err := x.ClientStream.CloseSend(); err != nil { + return nil, err + } + return x, nil +} + +type RouteGuide_ListFeaturesClient interface { + Recv() (*Feature, error) + grpc.ClientStream +} + +type routeGuideListFeaturesClient struct { + grpc.ClientStream +} + +func (x *routeGuideListFeaturesClient) Recv() (*Feature, error) { + m := new(Feature) + if err := x.ClientStream.RecvProto(m); err != nil { + return nil, err + } + return m, nil +} + +func (c *routeGuideClient) RecordRoute(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RecordRouteClient, error) { + stream, err := grpc.NewClientStream(ctx, &_RouteGuide_serviceDesc.Streams[1], c.cc, "/route_guide.RouteGuide/RecordRoute", opts...) + if err != nil { + return nil, err + } + x := &routeGuideRecordRouteClient{stream} + return x, nil +} + +type RouteGuide_RecordRouteClient interface { + Send(*Point) error + CloseAndRecv() (*RouteSummary, error) + grpc.ClientStream +} + +type routeGuideRecordRouteClient struct { + grpc.ClientStream +} + +func (x *routeGuideRecordRouteClient) Send(m *Point) error { + return x.ClientStream.SendProto(m) +} + +func (x *routeGuideRecordRouteClient) CloseAndRecv() (*RouteSummary, error) { + if err := x.ClientStream.CloseSend(); err != nil { + return nil, err + } + m := new(RouteSummary) + if err := x.ClientStream.RecvProto(m); err != nil { + return nil, err + } + return m, nil +} + +func (c *routeGuideClient) RouteChat(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RouteChatClient, error) { + stream, err := grpc.NewClientStream(ctx, &_RouteGuide_serviceDesc.Streams[2], c.cc, "/route_guide.RouteGuide/RouteChat", opts...) + if err != nil { + return nil, err + } + x := &routeGuideRouteChatClient{stream} + return x, nil +} + +type RouteGuide_RouteChatClient interface { + Send(*RouteNote) error + Recv() (*RouteNote, error) + grpc.ClientStream +} + +type routeGuideRouteChatClient struct { + grpc.ClientStream +} + +func (x *routeGuideRouteChatClient) Send(m *RouteNote) error { + return x.ClientStream.SendProto(m) +} + +func (x *routeGuideRouteChatClient) Recv() (*RouteNote, error) { + m := new(RouteNote) + if err := x.ClientStream.RecvProto(m); err != nil { + return nil, err + } + return m, nil +} + +// Server API for RouteGuide service + +type RouteGuideServer interface { + // A simple RPC. + // + // Obtains the feature at a given position. + GetFeature(context.Context, *Point) (*Feature, error) + // A server-to-client streaming RPC. + // + // Obtains the Features available within the given Rectangle. Results are + // streamed rather than returned at once (e.g. in a response message with a + // repeated field), as the rectangle may cover a large area and contain a + // huge number of features. + ListFeatures(*Rectangle, RouteGuide_ListFeaturesServer) error + // A client-to-server streaming RPC. + // + // Accepts a stream of Points on a route being traversed, returning a + // RouteSummary when traversal is completed. + RecordRoute(RouteGuide_RecordRouteServer) error + // A Bidirectional streaming RPC. + // + // Accepts a stream of RouteNotes sent while a route is being traversed, + // while receiving other RouteNotes (e.g. from other users). + RouteChat(RouteGuide_RouteChatServer) error +} + +func RegisterRouteGuideServer(s *grpc.Server, srv RouteGuideServer) { + s.RegisterService(&_RouteGuide_serviceDesc, srv) +} + +func _RouteGuide_GetFeature_Handler(srv interface{}, ctx context.Context, buf []byte) (proto.Message, error) { + in := new(Point) + if err := proto.Unmarshal(buf, in); err != nil { + return nil, err + } + out, err := srv.(RouteGuideServer).GetFeature(ctx, in) + if err != nil { + return nil, err + } + return out, nil +} + +func _RouteGuide_ListFeatures_Handler(srv interface{}, stream grpc.ServerStream) error { + m := new(Rectangle) + if err := stream.RecvProto(m); err != nil { + return err + } + return srv.(RouteGuideServer).ListFeatures(m, &routeGuideListFeaturesServer{stream}) +} + +type RouteGuide_ListFeaturesServer interface { + Send(*Feature) error + grpc.ServerStream +} + +type routeGuideListFeaturesServer struct { + grpc.ServerStream +} + +func (x *routeGuideListFeaturesServer) Send(m *Feature) error { + return x.ServerStream.SendProto(m) +} + +func _RouteGuide_RecordRoute_Handler(srv interface{}, stream grpc.ServerStream) error { + return srv.(RouteGuideServer).RecordRoute(&routeGuideRecordRouteServer{stream}) +} + +type RouteGuide_RecordRouteServer interface { + SendAndClose(*RouteSummary) error + Recv() (*Point, error) + grpc.ServerStream +} + +type routeGuideRecordRouteServer struct { + grpc.ServerStream +} + +func (x *routeGuideRecordRouteServer) SendAndClose(m *RouteSummary) error { + return x.ServerStream.SendProto(m) +} + +func (x *routeGuideRecordRouteServer) Recv() (*Point, error) { + m := new(Point) + if err := x.ServerStream.RecvProto(m); err != nil { + return nil, err + } + return m, nil +} + +func _RouteGuide_RouteChat_Handler(srv interface{}, stream grpc.ServerStream) error { + return srv.(RouteGuideServer).RouteChat(&routeGuideRouteChatServer{stream}) +} + +type RouteGuide_RouteChatServer interface { + Send(*RouteNote) error + Recv() (*RouteNote, error) + grpc.ServerStream +} + +type routeGuideRouteChatServer struct { + grpc.ServerStream +} + +func (x *routeGuideRouteChatServer) Send(m *RouteNote) error { + return x.ServerStream.SendProto(m) +} + +func (x *routeGuideRouteChatServer) Recv() (*RouteNote, error) { + m := new(RouteNote) + if err := x.ServerStream.RecvProto(m); err != nil { + return nil, err + } + return m, nil +} + +var _RouteGuide_serviceDesc = grpc.ServiceDesc{ + ServiceName: "route_guide.RouteGuide", + HandlerType: (*RouteGuideServer)(nil), + Methods: []grpc.MethodDesc{ + { + MethodName: "GetFeature", + Handler: _RouteGuide_GetFeature_Handler, + }, + }, + Streams: []grpc.StreamDesc{ + { + StreamName: "ListFeatures", + Handler: _RouteGuide_ListFeatures_Handler, + ServerStreams: true, + }, + { + StreamName: "RecordRoute", + Handler: _RouteGuide_RecordRoute_Handler, + ClientStreams: true, + }, + { + StreamName: "RouteChat", + Handler: _RouteGuide_RouteChat_Handler, + ServerStreams: true, + ClientStreams: true, + }, + }, +} diff --git a/examples/route_guide/route_guide.proto b/examples/route_guide/route_guide.proto new file mode 100644 index 00000000..ba09c5eb --- /dev/null +++ b/examples/route_guide/route_guide.proto @@ -0,0 +1,118 @@ +// Copyright 2015, 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. + +syntax = "proto3"; + +package route_guide; + +// Interface exported by the server. +service RouteGuide { + // A simple RPC. + // + // Obtains the feature at a given position. + rpc GetFeature(Point) returns (Feature) {} + + // A server-to-client streaming RPC. + // + // Obtains the Features available within the given Rectangle. Results are + // streamed rather than returned at once (e.g. in a response message with a + // repeated field), as the rectangle may cover a large area and contain a + // huge number of features. + rpc ListFeatures(Rectangle) returns (stream Feature) {} + + // A client-to-server streaming RPC. + // + // Accepts a stream of Points on a route being traversed, returning a + // RouteSummary when traversal is completed. + rpc RecordRoute(stream Point) returns (RouteSummary) {} + + // A Bidirectional streaming RPC. + // + // Accepts a stream of RouteNotes sent while a route is being traversed, + // while receiving other RouteNotes (e.g. from other users). + rpc RouteChat(stream RouteNote) returns (stream RouteNote) {} +} + +// Points are represented as latitude-longitude pairs in the E7 representation +// (degrees multiplied by 10**7 and rounded to the nearest integer). +// Latitudes should be in the range +/- 90 degrees and longitude should be in +// the range +/- 180 degrees (inclusive). +message Point { + int32 latitude = 1; + int32 longitude = 2; +} + +// A latitude-longitude rectangle, represented as two diagonally opposite +// points "lo" and "hi". +message Rectangle { + // One corner of the rectangle. + Point lo = 1; + + // The other corner of the rectangle. + Point hi = 2; +} + +// A feature names something at a given point. +// +// If a feature could not be named, the name is empty. +message Feature { + // The name of the feature. + string name = 1; + + // The point where the feature is detected. + Point location = 2; +} + +// A RouteNote is a message sent while at a given point. +message RouteNote { + // The location from which the message is sent. + Point location = 1; + + // The message to be sent. + string message = 2; +} + +// A RouteSummary is received in response to a RecordRoute rpc. +// +// It contains the number of individual points received, the number of +// detected features, and the total distance covered as the cumulative sum of +// the distance between each point. +message RouteSummary { + // The number of points received. + int32 point_count = 1; + + // The number of known features passed while traversing the route. + int32 feature_count = 2; + + // The distance covered in metres. + int32 distance = 3; + + // The duration of the traversal in seconds. + int32 elapsed_time = 4; +} diff --git a/examples/route_guide/server/server.go b/examples/route_guide/server/server.go new file mode 100644 index 00000000..4adc1232 --- /dev/null +++ b/examples/route_guide/server/server.go @@ -0,0 +1,221 @@ +/* + * + * Copyright 2015, 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 main + +import ( + "encoding/json" + "flag" + "io" + "io/ioutil" + "log" + "math" + "net" + "strconv" + "time" + + "golang.org/x/net/context" + "google.golang.org/grpc" + + "google.golang.org/grpc/credentials" + + pb "github.com/wonderfly/grpc-go/examples/route_guide" +) + +var ( + useTLS = flag.Bool("use_tls", false, "Connection uses TLS if true, else plain TCP") + certFile = flag.String("tls_cert_file", "testdata/server1.pem", "The TLS cert file") + keyFile = flag.String("tls_key_file", "testdata/server1.key", "The TLS key file") + jsonDBFile = flag.String("route_guide_db", "testdata/route_guide_db.json", "A json file containing a list of features") + port = flag.Int("port", 10000, "The server port") +) + +type routeGuideServer struct { + savedFeatures []pb.Feature + routeNotes map[pb.Point][]*pb.RouteNote +} + +// GetFeature returns the feature at the given point. +func (s *routeGuideServer) GetFeature(ctx context.Context, point *pb.Point) (*pb.Feature, error) { + for _, feature := range s.savedFeatures { + if *(feature.Location) == *point { + return &feature, nil + } + } + // No feature was found, return an unnamed feature + return &pb.Feature{"", point}, nil +} + +// ListFeatures lists all features comtained within the given bounding Rectangle. +func (s *routeGuideServer) ListFeatures(rect *pb.Rectangle, stream pb.RouteGuide_ListFeaturesServer) error { + left := math.Min(float64(rect.Lo.Longitude), float64(rect.Hi.Longitude)) + right := math.Max(float64(rect.Lo.Longitude), float64(rect.Hi.Longitude)) + top := math.Max(float64(rect.Lo.Latitude), float64(rect.Hi.Latitude)) + bottom := math.Min(float64(rect.Lo.Latitude), float64(rect.Hi.Latitude)) + for _, feature := range s.savedFeatures { + if float64(feature.Location.Longitude) >= left && + float64(feature.Location.Longitude) <= right && + float64(feature.Location.Latitude) >= bottom && + float64(feature.Location.Latitude) <= top { + if err := stream.Send(&feature); err != nil { + return err + } + } + } + return nil +} + +// RecordRoute records a route composited of a sequence of points. +// +// It gets a stream of points, and responds with statistics about the "trip": +// number of points, number of known features visited, total distance traveled, and +// total time spent. +func (s *routeGuideServer) RecordRoute(stream pb.RouteGuide_RecordRouteServer) error { + var pointCount, featureCount, distance int32 + var lastPoint *pb.Point + startTime := time.Now() + for { + point, err := stream.Recv() + if err == io.EOF { + endTime := time.Now() + return stream.SendAndClose(&pb.RouteSummary{ + PointCount: pointCount, + FeatureCount: featureCount, + Distance: distance, + ElapsedTime: int32(endTime.Sub(startTime).Seconds()), + }) + } + if err != nil { + return err + } + pointCount++ + for _, feature := range s.savedFeatures { + if *(feature.Location) == *point { + featureCount++ + } + } + if lastPoint != nil { + distance += calcDistance(lastPoint, point) + } + lastPoint = point + } +} + +// RouteChat receives a stream of message/location pairs, and responds with a stream of all +// previous messages at each of those locations. +func (s *routeGuideServer) RouteChat(stream pb.RouteGuide_RouteChatServer) error { + for { + in, err := stream.Recv() + if err == io.EOF { + return nil + } + if err != nil { + return err + } + point := *(in.Location) + if _, present := s.routeNotes[point]; !present { + s.routeNotes[point] = []*pb.RouteNote{in} + + } else { + s.routeNotes[point] = append(s.routeNotes[point], in) + } + for _, note := range s.routeNotes[point] { + if err := stream.Send(note); err != nil { + return err + } + } + } +} + +// loadFeatures loads features from a JSON file. +func (s *routeGuideServer) loadFeatures(filePath string) { + file, err := ioutil.ReadFile(filePath) + if err != nil { + log.Fatal("Failed to load default features: %v\n", err) + } + if err := json.Unmarshal(file, &(s.savedFeatures)); err != nil { + log.Fatal("Failed to load default features: %v\n", err) + } +} + +func toRadians(num float64) float64 { + return num * math.Pi / float64(180) +} + +func calcDistance(p1 *pb.Point, p2 *pb.Point) int32 { + const COORD_FACTOR float64 = 1e7 + const R float64 = float64(6371000) // metres + lat1 := float64(p1.Latitude) / COORD_FACTOR + lat2 := float64(p2.Latitude) / COORD_FACTOR + lon1 := float64(p1.Longitude) / COORD_FACTOR + lon2 := float64(p2.Longitude) / COORD_FACTOR + φ1 := toRadians(lat1) + φ2 := toRadians(lat2) + Δφ := toRadians(lat2 - lat1) + Δλ := toRadians(lon2 - lon1) + + a := math.Sin(Δφ/2)*math.Sin(Δφ/2) + + math.Cos(φ1)*math.Cos(φ2)* + math.Sin(Δλ/2)*math.Sin(Δλ/2) + c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a)) + + distance := R * c + return int32(distance) +} + +func newServer() *routeGuideServer { + s := new(routeGuideServer) + s.loadFeatures(*jsonDBFile) + s.routeNotes = make(map[pb.Point][]*pb.RouteNote, 0) + return s +} + +func main() { + flag.Parse() + p := strconv.Itoa(*port) + lis, err := net.Listen("tcp", ":"+p) + if err != nil { + log.Fatalf("failed to listen: %v", err) + } + grpcServer := grpc.NewServer() + pb.RegisterRouteGuideServer(grpcServer, newServer()) + if *useTLS { + creds, err := credentials.NewServerTLSFromFile(*certFile, *keyFile) + if err != nil { + log.Fatalf("Failed to generate credentials %v", err) + } + grpcServer.Serve(creds.NewListener(lis)) + } else { + grpcServer.Serve(lis) + } +} diff --git a/examples/route_guide/testdata/ca.pem b/examples/route_guide/testdata/ca.pem new file mode 100644 index 00000000..999da897 --- /dev/null +++ b/examples/route_guide/testdata/ca.pem @@ -0,0 +1,14 @@ +-----BEGIN CERTIFICATE----- +MIICIzCCAYwCCQCFTbF7XNSvvjANBgkqhkiG9w0BAQUFADBWMQswCQYDVQQGEwJB +VTETMBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0 +cyBQdHkgTHRkMQ8wDQYDVQQDDAZ0ZXN0Y2EwHhcNMTQwNzE3MjMxNzUxWhcNMjQw +NzE0MjMxNzUxWjBWMQswCQYDVQQGEwJBVTETMBEGA1UECAwKU29tZS1TdGF0ZTEh +MB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMQ8wDQYDVQQDDAZ0ZXN0 +Y2EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMBA3wVeTGHZR1Rye/i+J8a2 +cu5gXwFV6TnObzGM7bLFCO5i9v4mLo4iFzPsHmWDUxKS3Y8iXbu0eYBlLoNY0lSv +xDx33O+DuwMmVN+DzSD+Eod9zfvwOWHsazYCZT2PhNxnVWIuJXViY4JAHUGodjx+ +QAi6yCAurUZGvYXGgZSBAgMBAAEwDQYJKoZIhvcNAQEFBQADgYEAQoQVD8bwdtWJ +AniGBwcCfqYyH+/KpA10AcebJVVTyYbYvI9Q8d6RSVu4PZy9OALHR/QrWBdYTAyz +fNAmc2cmdkSRJzjhIaOstnQy1J+Fk0T9XyvQtq499yFbq9xogUVlEGH62xP6vH0Y +5ukK//dCPAzA11YuX2rnex0JhuTQfcI= +-----END 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+ }, + "name": "261 Van Sickle Road, Goshen, NY 10924, USA" +}, { + "location": { + "latitude": 418465462, + "longitude": -746859398 + }, + "name": "" +}, { + "location": { + "latitude": 411733222, + "longitude": -744228360 + }, + "name": "" +}, { + "location": { + "latitude": 410248224, + "longitude": -747127767 + }, + "name": "3 Hasta Way, Newton, NJ 07860, USA" +}] diff --git a/examples/route_guide/testdata/server1.key b/examples/route_guide/testdata/server1.key new file mode 100644 index 00000000..ed00cd50 --- /dev/null +++ b/examples/route_guide/testdata/server1.key @@ -0,0 +1,15 @@ +-----BEGIN RSA PRIVATE KEY----- +MIICWwIBAAKBgQDhwxUnKCwlSaWAwzOB2LSHVegJHv7DDWminTg4wzLLsf+LQ8nZ +bpjfn5vgIzxCuRh4Rp9QYM5FhfrJX9wcYawP/HTbJ7p7LVQO2QYAP+akMTHxgKuM +BzVV++3wWToKfVZUjFX8nfTfGMGwWAHJDnlEGnU4tl9UujoCV4ENJtzFoQIDAQAB +AoGAJ+6hpzNr24yTQZtFWQpDpEyFplddKJMOxDya3S9ppK3vTWrIITV2xNcucw7I +ceTbdyrGsyjsU0/HdCcIf9ym2jfmGLUwmyhltKVw0QYcFB0XLkc0nI5YvEYoeVDg 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