| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| // Package main implements a simple gRPC server that demonstrates how to use gRPC-Go libraries |
| // to perform unary, client streaming, server streaming and full duplex RPCs. |
| // |
| // It implements the route guide service whose definition can be found in routeguide/route_guide.proto. |
| package main |
| |
| import ( |
| "context" |
| "encoding/json" |
| "flag" |
| "fmt" |
| "io" |
| "io/ioutil" |
| "log" |
| "math" |
| "net" |
| "sync" |
| "time" |
| |
| "google.golang.org/grpc" |
| |
| "google.golang.org/grpc/credentials" |
| "google.golang.org/grpc/examples/data" |
| |
| "github.com/golang/protobuf/proto" |
| |
| pb "google.golang.org/grpc/examples/route_guide/routeguide" |
| ) |
| |
| var ( |
| tls = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP") |
| certFile = flag.String("cert_file", "", "The TLS cert file") |
| keyFile = flag.String("key_file", "", "The TLS key file") |
| jsonDBFile = flag.String("json_db_file", "", "A json file containing a list of features") |
| port = flag.Int("port", 10000, "The server port") |
| ) |
| |
| type routeGuideServer struct { |
| savedFeatures []*pb.Feature // read-only after initialized |
| |
| mu sync.Mutex // protects routeNotes |
| routeNotes map[string][]*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 proto.Equal(feature.Location, point) { |
| return feature, nil |
| } |
| } |
| // No feature was found, return an unnamed feature |
| return &pb.Feature{Location: point}, nil |
| } |
| |
| // ListFeatures lists all features contained within the given bounding Rectangle. |
| func (s *routeGuideServer) ListFeatures(rect *pb.Rectangle, stream pb.RouteGuide_ListFeaturesServer) error { |
| for _, feature := range s.savedFeatures { |
| if inRange(feature.Location, rect) { |
| 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 proto.Equal(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 |
| } |
| key := serialize(in.Location) |
| |
| s.mu.Lock() |
| s.routeNotes[key] = append(s.routeNotes[key], in) |
| // Note: this copy prevents blocking other clients while serving this one. |
| // We don't need to do a deep copy, because elements in the slice are |
| // insert-only and never modified. |
| rn := make([]*pb.RouteNote, len(s.routeNotes[key])) |
| copy(rn, s.routeNotes[key]) |
| s.mu.Unlock() |
| |
| for _, note := range rn { |
| if err := stream.Send(note); err != nil { |
| return err |
| } |
| } |
| } |
| } |
| |
| // loadFeatures loads features from a JSON file. |
| func (s *routeGuideServer) loadFeatures(filePath string) { |
| var data []byte |
| if filePath != "" { |
| var err error |
| data, err = ioutil.ReadFile(filePath) |
| if err != nil { |
| log.Fatalf("Failed to load default features: %v", err) |
| } |
| } else { |
| data = exampleData |
| } |
| if err := json.Unmarshal(data, &s.savedFeatures); err != nil { |
| log.Fatalf("Failed to load default features: %v", err) |
| } |
| } |
| |
| func toRadians(num float64) float64 { |
| return num * math.Pi / float64(180) |
| } |
| |
| // calcDistance calculates the distance between two points using the "haversine" formula. |
| // The formula is based on http://mathforum.org/library/drmath/view/51879.html. |
| func calcDistance(p1 *pb.Point, p2 *pb.Point) int32 { |
| const CordFactor float64 = 1e7 |
| const R = float64(6371000) // earth radius in metres |
| lat1 := toRadians(float64(p1.Latitude) / CordFactor) |
| lat2 := toRadians(float64(p2.Latitude) / CordFactor) |
| lng1 := toRadians(float64(p1.Longitude) / CordFactor) |
| lng2 := toRadians(float64(p2.Longitude) / CordFactor) |
| dlat := lat2 - lat1 |
| dlng := lng2 - lng1 |
| |
| a := math.Sin(dlat/2)*math.Sin(dlat/2) + |
| math.Cos(lat1)*math.Cos(lat2)* |
| math.Sin(dlng/2)*math.Sin(dlng/2) |
| c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a)) |
| |
| distance := R * c |
| return int32(distance) |
| } |
| |
| func inRange(point *pb.Point, rect *pb.Rectangle) bool { |
| 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)) |
| |
| if float64(point.Longitude) >= left && |
| float64(point.Longitude) <= right && |
| float64(point.Latitude) >= bottom && |
| float64(point.Latitude) <= top { |
| return true |
| } |
| return false |
| } |
| |
| func serialize(point *pb.Point) string { |
| return fmt.Sprintf("%d %d", point.Latitude, point.Longitude) |
| } |
| |
| func newServer() *routeGuideServer { |
| s := &routeGuideServer{routeNotes: make(map[string][]*pb.RouteNote)} |
| s.loadFeatures(*jsonDBFile) |
| return s |
| } |
| |
| func main() { |
| flag.Parse() |
| lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", *port)) |
| if err != nil { |
| log.Fatalf("failed to listen: %v", err) |
| } |
| var opts []grpc.ServerOption |
| if *tls { |
| if *certFile == "" { |
| *certFile = data.Path("x509/server_cert.pem") |
| } |
| if *keyFile == "" { |
| *keyFile = data.Path("x509/server_key.pem") |
| } |
| creds, err := credentials.NewServerTLSFromFile(*certFile, *keyFile) |
| if err != nil { |
| log.Fatalf("Failed to generate credentials %v", err) |
| } |
| opts = []grpc.ServerOption{grpc.Creds(creds)} |
| } |
| grpcServer := grpc.NewServer(opts...) |
| pb.RegisterRouteGuideService(grpcServer, pb.NewRouteGuideService(newServer())) |
| grpcServer.Serve(lis) |
| } |
| |
| // exampleData is a copy of testdata/route_guide_db.json. It's to avoid |
| // specifying file path with `go run`. |
| var exampleData = []byte(`[{ |
| "location": { |
| "latitude": 407838351, |
| "longitude": -746143763 |
| }, |
| "name": "Patriots Path, Mendham, NJ 07945, USA" |
| }, { |
| "location": { |
| "latitude": 408122808, |
| "longitude": -743999179 |
| }, |
| "name": "101 New Jersey 10, Whippany, NJ 07981, USA" |
| }, { |
| "location": { |
| "latitude": 413628156, |
| "longitude": -749015468 |
| }, |
| "name": "U.S. 6, Shohola, PA 18458, USA" |
| }, { |
| "location": { |
| "latitude": 419999544, |
| "longitude": -740371136 |
| }, |
| "name": "5 Conners Road, Kingston, NY 12401, USA" |
| }, { |
| "location": { |
| "latitude": 414008389, |
| "longitude": -743951297 |
| }, |
| "name": "Mid Hudson Psychiatric Center, New Hampton, NY 10958, USA" |
| }, { |
| "location": { |
| "latitude": 419611318, |
| "longitude": -746524769 |
| }, |
| "name": "287 Flugertown Road, Livingston Manor, NY 12758, USA" |
| }, { |
| "location": { |
| "latitude": 406109563, |
| "longitude": -742186778 |
| }, |
| "name": "4001 Tremley Point Road, Linden, NJ 07036, USA" |
| }, { |
| "location": { |
| "latitude": 416802456, |
| "longitude": -742370183 |
| }, |
| "name": "352 South Mountain Road, Wallkill, NY 12589, USA" |
| }, { |
| "location": { |
| "latitude": 412950425, |
| "longitude": -741077389 |
| }, |
| "name": "Bailey Turn Road, Harriman, NY 10926, USA" |
| }, { |
| "location": { |
| "latitude": 412144655, |
| "longitude": -743949739 |
| }, |
| "name": "193-199 Wawayanda Road, Hewitt, NJ 07421, USA" |
| }, { |
| "location": { |
| "latitude": 415736605, |
| "longitude": -742847522 |
| }, |
| "name": "406-496 Ward Avenue, Pine Bush, NY 12566, USA" |
| }, { |
| "location": { |
| "latitude": 413843930, |
| "longitude": -740501726 |
| }, |
| "name": "162 Merrill Road, Highland Mills, NY 10930, USA" |
| }, { |
| "location": { |
| "latitude": 410873075, |
| "longitude": -744459023 |
| }, |
| "name": "Clinton Road, West Milford, NJ 07480, USA" |
| }, { |
| "location": { |
| "latitude": 412346009, |
| "longitude": -744026814 |
| }, |
| "name": "16 Old Brook Lane, Warwick, NY 10990, USA" |
| }, { |
| "location": { |
| "latitude": 402948455, |
| "longitude": -747903913 |
| }, |
| "name": "3 Drake Lane, Pennington, NJ 08534, USA" |
| }, { |
| "location": { |
| "latitude": 406337092, |
| "longitude": -740122226 |
| }, |
| "name": "6324 8th Avenue, Brooklyn, NY 11220, USA" |
| }, { |
| "location": { |
| "latitude": 406421967, |
| "longitude": -747727624 |
| }, |
| "name": "1 Merck Access Road, Whitehouse Station, NJ 08889, USA" |
| }, { |
| "location": { |
| "latitude": 416318082, |
| "longitude": -749677716 |
| }, |
| "name": "78-98 Schalck Road, Narrowsburg, NY 12764, USA" |
| }, { |
| "location": { |
| "latitude": 415301720, |
| "longitude": -748416257 |
| }, |
| "name": "282 Lakeview Drive Road, Highland Lake, NY 12743, USA" |
| }, { |
| "location": { |
| "latitude": 402647019, |
| "longitude": -747071791 |
| }, |
| "name": "330 Evelyn Avenue, Hamilton Township, NJ 08619, USA" |
| }, { |
| "location": { |
| "latitude": 412567807, |
| "longitude": -741058078 |
| }, |
| "name": "New York State Reference Route 987E, Southfields, NY 10975, USA" |
| }, { |
| "location": { |
| "latitude": 416855156, |
| "longitude": -744420597 |
| }, |
| "name": "103-271 Tempaloni Road, Ellenville, NY 12428, USA" |
| }, { |
| "location": { |
| "latitude": 404663628, |
| "longitude": -744820157 |
| }, |
| "name": "1300 Airport Road, North Brunswick Township, NJ 08902, USA" |
| }, { |
| "location": { |
| "latitude": 407113723, |
| "longitude": -749746483 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 402133926, |
| "longitude": -743613249 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 400273442, |
| "longitude": -741220915 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 411236786, |
| "longitude": -744070769 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 411633782, |
| "longitude": -746784970 |
| }, |
| "name": "211-225 Plains Road, Augusta, NJ 07822, USA" |
| }, { |
| "location": { |
| "latitude": 415830701, |
| "longitude": -742952812 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 413447164, |
| "longitude": -748712898 |
| }, |
| "name": "165 Pedersen Ridge Road, Milford, PA 18337, USA" |
| }, { |
| "location": { |
| "latitude": 405047245, |
| "longitude": -749800722 |
| }, |
| "name": "100-122 Locktown Road, Frenchtown, NJ 08825, USA" |
| }, { |
| "location": { |
| "latitude": 418858923, |
| "longitude": -746156790 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 417951888, |
| "longitude": -748484944 |
| }, |
| "name": "650-652 Willi Hill Road, Swan Lake, NY 12783, USA" |
| }, { |
| "location": { |
| "latitude": 407033786, |
| "longitude": -743977337 |
| }, |
| "name": "26 East 3rd Street, New Providence, NJ 07974, USA" |
| }, { |
| "location": { |
| "latitude": 417548014, |
| "longitude": -740075041 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 410395868, |
| "longitude": -744972325 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 404615353, |
| "longitude": -745129803 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 406589790, |
| "longitude": -743560121 |
| }, |
| "name": "611 Lawrence Avenue, Westfield, NJ 07090, USA" |
| }, { |
| "location": { |
| "latitude": 414653148, |
| "longitude": -740477477 |
| }, |
| "name": "18 Lannis Avenue, New Windsor, NY 12553, USA" |
| }, { |
| "location": { |
| "latitude": 405957808, |
| "longitude": -743255336 |
| }, |
| "name": "82-104 Amherst Avenue, Colonia, NJ 07067, USA" |
| }, { |
| "location": { |
| "latitude": 411733589, |
| "longitude": -741648093 |
| }, |
| "name": "170 Seven Lakes Drive, Sloatsburg, NY 10974, USA" |
| }, { |
| "location": { |
| "latitude": 412676291, |
| "longitude": -742606606 |
| }, |
| "name": "1270 Lakes Road, Monroe, NY 10950, USA" |
| }, { |
| "location": { |
| "latitude": 409224445, |
| "longitude": -748286738 |
| }, |
| "name": "509-535 Alphano Road, Great Meadows, NJ 07838, USA" |
| }, { |
| "location": { |
| "latitude": 406523420, |
| "longitude": -742135517 |
| }, |
| "name": "652 Garden Street, Elizabeth, NJ 07202, USA" |
| }, { |
| "location": { |
| "latitude": 401827388, |
| "longitude": -740294537 |
| }, |
| "name": "349 Sea Spray Court, Neptune City, NJ 07753, USA" |
| }, { |
| "location": { |
| "latitude": 410564152, |
| "longitude": -743685054 |
| }, |
| "name": "13-17 Stanley Street, West Milford, NJ 07480, USA" |
| }, { |
| "location": { |
| "latitude": 408472324, |
| "longitude": -740726046 |
| }, |
| "name": "47 Industrial Avenue, Teterboro, NJ 07608, USA" |
| }, { |
| "location": { |
| "latitude": 412452168, |
| "longitude": -740214052 |
| }, |
| "name": "5 White Oak Lane, Stony Point, NY 10980, USA" |
| }, { |
| "location": { |
| "latitude": 409146138, |
| "longitude": -746188906 |
| }, |
| "name": "Berkshire Valley Management Area Trail, Jefferson, NJ, USA" |
| }, { |
| "location": { |
| "latitude": 404701380, |
| "longitude": -744781745 |
| }, |
| "name": "1007 Jersey Avenue, New Brunswick, NJ 08901, USA" |
| }, { |
| "location": { |
| "latitude": 409642566, |
| "longitude": -746017679 |
| }, |
| "name": "6 East Emerald Isle Drive, Lake Hopatcong, NJ 07849, USA" |
| }, { |
| "location": { |
| "latitude": 408031728, |
| "longitude": -748645385 |
| }, |
| "name": "1358-1474 New Jersey 57, Port Murray, NJ 07865, USA" |
| }, { |
| "location": { |
| "latitude": 413700272, |
| "longitude": -742135189 |
| }, |
| "name": "367 Prospect Road, Chester, NY 10918, USA" |
| }, { |
| "location": { |
| "latitude": 404310607, |
| "longitude": -740282632 |
| }, |
| "name": "10 Simon Lake Drive, Atlantic Highlands, NJ 07716, USA" |
| }, { |
| "location": { |
| "latitude": 409319800, |
| "longitude": -746201391 |
| }, |
| "name": "11 Ward Street, Mount Arlington, NJ 07856, USA" |
| }, { |
| "location": { |
| "latitude": 406685311, |
| "longitude": -742108603 |
| }, |
| "name": "300-398 Jefferson Avenue, Elizabeth, NJ 07201, USA" |
| }, { |
| "location": { |
| "latitude": 419018117, |
| "longitude": -749142781 |
| }, |
| "name": "43 Dreher Road, Roscoe, NY 12776, USA" |
| }, { |
| "location": { |
| "latitude": 412856162, |
| "longitude": -745148837 |
| }, |
| "name": "Swan Street, Pine Island, NY 10969, USA" |
| }, { |
| "location": { |
| "latitude": 416560744, |
| "longitude": -746721964 |
| }, |
| "name": "66 Pleasantview Avenue, Monticello, NY 12701, USA" |
| }, { |
| "location": { |
| "latitude": 405314270, |
| "longitude": -749836354 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 414219548, |
| "longitude": -743327440 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 415534177, |
| "longitude": -742900616 |
| }, |
| "name": "565 Winding Hills Road, Montgomery, NY 12549, USA" |
| }, { |
| "location": { |
| "latitude": 406898530, |
| "longitude": -749127080 |
| }, |
| "name": "231 Rocky Run Road, Glen Gardner, NJ 08826, USA" |
| }, { |
| "location": { |
| "latitude": 407586880, |
| "longitude": -741670168 |
| }, |
| "name": "100 Mount Pleasant Avenue, Newark, NJ 07104, USA" |
| }, { |
| "location": { |
| "latitude": 400106455, |
| "longitude": -742870190 |
| }, |
| "name": "517-521 Huntington Drive, Manchester Township, NJ 08759, USA" |
| }, { |
| "location": { |
| "latitude": 400066188, |
| "longitude": -746793294 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 418803880, |
| "longitude": -744102673 |
| }, |
| "name": "40 Mountain Road, Napanoch, NY 12458, USA" |
| }, { |
| "location": { |
| "latitude": 414204288, |
| "longitude": -747895140 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 414777405, |
| "longitude": -740615601 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 415464475, |
| "longitude": -747175374 |
| }, |
| "name": "48 North Road, Forestburgh, NY 12777, USA" |
| }, { |
| "location": { |
| "latitude": 404062378, |
| "longitude": -746376177 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 405688272, |
| "longitude": -749285130 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 400342070, |
| "longitude": -748788996 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 401809022, |
| "longitude": -744157964 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 404226644, |
| "longitude": -740517141 |
| }, |
| "name": "9 Thompson Avenue, Leonardo, NJ 07737, USA" |
| }, { |
| "location": { |
| "latitude": 410322033, |
| "longitude": -747871659 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 407100674, |
| "longitude": -747742727 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 418811433, |
| "longitude": -741718005 |
| }, |
| "name": "213 Bush Road, Stone Ridge, NY 12484, USA" |
| }, { |
| "location": { |
| "latitude": 415034302, |
| "longitude": -743850945 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 411349992, |
| "longitude": -743694161 |
| }, |
| "name": "" |
| }, { |
| "location": { |
| "latitude": 404839914, |
| "longitude": -744759616 |
| }, |
| "name": "1-17 Bergen Court, New Brunswick, NJ 08901, USA" |
| }, { |
| "location": { |
| "latitude": 414638017, |
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