Routes API を使用してルートを取得するには、computeRoutes メソッド(REST)に HTTP POST リクエストを送信するか、ComputeRoutes メソッド(gRPC)を呼び出します。
次の例は、computeRoutes
メソッドに対する REST リクエストの URL を示しています。
https://routes.googleapis.com/directions/v2:computeRoutes
リクエスト オプションを JSON リクエスト本文に含めます。リクエストの本文には、送信元と送信先の場所と、ルートに設定するオプションが含まれます。詳細については、ロケーションを指定すると利用可能なルート オプションをご覧ください。
レスポンスには、URL パラメータ $fields
または field
情報を使用してレスポンス フィールド マスクで指定したフィールドが、HTTP gRPC ヘッダー X-Goog-FieldMask
を使用して含まれます。詳しくは、返す情報を選択するをご覧ください。
交通機関のルート リクエストの例については、例: 交通機関でルートを取得するをご覧ください。
例: HTTP ルート リクエスト
次のコードは、computeRoutes リクエストのリクエスト本文を作成する方法を示しています。この例では、ソースと宛先の場所を設定し、次も指定します。
DRIVE
のtravelMode
と、交通状況に応じた運転ルート。en-US
の言語で、距離の単位がimperial
の場合。X-Goog-FieldMask
ヘッダー内のレスポンス フィールド マスク。レスポンスで次のフィールドを返すことを指定します。routes.duration
routes.distanceMeters
routes.polyline.encodedPolyline
curl -X POST -d '{ "origin":{ "location":{ "latLng":{ "latitude": 37.419734, "longitude": -122.0827784 } } }, "destination":{ "location":{ "latLng":{ "latitude": 37.417670, "longitude": -122.079595 } } }, "travelMode": "DRIVE", "routingPreference": "TRAFFIC_AWARE", "computeAlternativeRoutes": false, "routeModifiers": { "avoidTolls": false, "avoidHighways": false, "avoidFerries": false }, "languageCode": "en-US", "units": "IMPERIAL" }' \ -H 'Content-Type: application/json' -H 'X-Goog-Api-Key: YOUR_API_KEY' \ -H 'X-Goog-FieldMask: routes.duration,routes.distanceMeters,routes.polyline.encodedPolyline' \ 'https://routes.googleapis.com/directions/v2:computeRoutes'
例: HTTP ルート レスポンスの本文
上記の呼び出しにより、次の JSON レスポンスが生成されます。
{ "routes": [ { "distanceMeters": 772, "duration": "165s", "polyline": { "encodedPolyline": "ipkcFfichVnP@j@BLoFVwM{E?" } } ] }
例: gRPC リクエスト
gRPC は、Google が開発した高性能で汎用的なオープンソース RPC フレームワークです。gRPC では、クライアント アプリケーションから別のマシンのサーバー アプリケーション上のメソッドを、ローカル オブジェクトであるかのように直接呼び出すことができます。
次の例は、gRPC リクエストを示しています。
Go
package main import ( "context" "crypto/tls" "fmt" "log" "time" routespb "google.golang.org/genproto/googleapis/maps/routing/v2" "google.golang.org/genproto/googleapis/type/latlng" "google.golang.org/grpc" "google.golang.org/grpc/credentials" "google.golang.org/grpc/metadata" ) const ( fieldMask = "*" apiKey = "INSERT_API_KEY_HERE" serverAddr = "routes.googleapis.com:443" ) func main() { config := tls.Config{} conn, err := grpc.Dial(serverAddr, grpc.WithTransportCredentials(credentials.NewTLS(&config))) if err != nil { log.Fatalf("Failed to connect: %v", err) } defer conn.Close() client := routespb.NewRoutesClient(conn) ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second) ctx = metadata.AppendToOutgoingContext(ctx, "X-Goog-Api-Key", apiKey) ctx = metadata.AppendToOutgoingContext(ctx, "X-Goog-Fieldmask", fieldMask) defer cancel() // create the origin using a latitude and longitude origin := &routespb.Waypoint{ LocationType: &routespb.Waypoint_Location{ Location: &routespb.Location{ LatLng: &latlng.LatLng{ Latitude: 37.417670, Longitude: -122.0827784, }, }, }, } // create the destination using a latitude and longitude destination := &routespb.Waypoint{ LocationType: &routespb.Waypoint_Location{ Location: &routespb.Location{ LatLng: &latlng.LatLng{ Latitude: 37.417670, Longitude: -122.079595, }, }, }, } req := &routespb.ComputeRoutesRequest{ Origin: origin, Destination: destination, TravelMode: routespb.RouteTravelMode_DRIVE, RoutingPreference: routespb.RoutingPreference_TRAFFIC_AWARE, ComputeAlternativeRoutes: true, Units: routespb.Units_METRIC, RouteModifiers: &routespb.RouteModifiers{ AvoidTolls: false, AvoidHighways: true, AvoidFerries: true, }, PolylineQuality: routespb.PolylineQuality_OVERVIEW, } // execute rpc resp, err := client.ComputeRoutes(ctx, req) if err != nil { // "rpc error: code = InvalidArgument desc = Request contains an invalid // argument" may indicate that your project lacks access to Routes log.Fatal(err) } fmt.Printf("Response: %v", resp) }
Java
package com.example; import com.google.maps.routing.v2.*; import com.google.type.LatLng; import io.grpc.CallOptions; import io.grpc.Channel; import io.grpc.ClientCall; import io.grpc.ClientInterceptor; import io.grpc.ClientInterceptors; import io.grpc.ForwardingClientCall; import io.grpc.Metadata; import io.grpc.MethodDescriptor; import io.grpc.StatusRuntimeException; import io.grpc.netty.NettyChannelBuilder; import java.util.Iterator; import java.util.concurrent.TimeUnit; import java.util.logging.Level; import java.util.logging.Logger; public class RoutesClient { // For more detail on inserting API keys, see: // https://cloud.google.com/endpoints/docs/grpc/restricting-api-access-with-api-keys#java // For more detail on system parameters (such as FieldMask), see: // https://cloud.google.com/apis/docs/system-parameters private static final class RoutesInterceptor implements ClientInterceptor { private final String apiKey; private static final Logger logger = Logger.getLogger(RoutesInterceptor.class.getName()); private static Metadata.Key<String> API_KEY_HEADER = Metadata.Key.of("x-goog-api-key", Metadata.ASCII_STRING_MARSHALLER); private static Metadata.Key<String> FIELD_MASK_HEADER = Metadata.Key.of("x-goog-fieldmask", Metadata.ASCII_STRING_MARSHALLER); public RoutesInterceptor(String apiKey) { this.apiKey = apiKey; } @Override public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) { logger.info("Intercepted " + method.getFullMethodName()); ClientCall<ReqT, RespT> call = next.newCall(method, callOptions); call = new ForwardingClientCall.SimpleForwardingClientCall<ReqT, RespT>(call) { @Override public void start(Listener<RespT> responseListener, Metadata headers) { headers.put(API_KEY_HEADER, apiKey); // Note that setting the field mask to * is OK for testing, but discouraged in // production. // For example, for ComputeRoutes, set the field mask to // "routes.distanceMeters,routes.duration,routes.polyline.encodedPolyline" // in order to get the route distances, durations, and encoded polylines. headers.put(FIELD_MASK_HEADER, "*"); super.start(responseListener, headers); } }; return call; } } private static final Logger logger = Logger.getLogger(RoutesClient.class.getName()); private final RoutesGrpc.RoutesBlockingStub blockingStub; public RoutesClient(Channel channel) { blockingStub = RoutesGrpc.newBlockingStub(channel); } public static Waypoint createWaypointForLatLng(double lat, double lng) { return Waypoint.newBuilder() .setLocation(Location.newBuilder().setLatLng(LatLng.newBuilder().setLatitude(lat).setLongitude(lng))) .build(); } public void computeRoutes() { ComputeRoutesRequest request = ComputeRoutesRequest.newBuilder() .setOrigin(createWaypointForLatLng(37.420761, -122.081356)) .setDestination(createWaypointForLatLng(37.420999, -122.086894)).setTravelMode(RouteTravelMode.DRIVE) .setRoutingPreference(RoutingPreference.TRAFFIC_AWARE).setComputeAlternativeRoutes(true) .setRouteModifiers( RouteModifiers.newBuilder().setAvoidTolls(false).setAvoidHighways(true).setAvoidFerries(true)) .setPolylineQuality(PolylineQuality.OVERVIEW).build(); ComputeRoutesResponse response; try { logger.info("About to send request: " + request.toString()); response = blockingStub.withDeadlineAfter(2000, TimeUnit.MILLISECONDS).computeRoutes(request); } catch (StatusRuntimeException e) { logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus()); return; } logger.info("Response: " + response.toString()); } public void computeRouteMatrix() { ComputeRouteMatrixRequest request = ComputeRouteMatrixRequest.newBuilder() .addOrigins(RouteMatrixOrigin.newBuilder().setWaypoint(createWaypointForLatLng(37.420761, -122.081356)) .setRouteModifiers(RouteModifiers.newBuilder().setAvoidTolls(false).setAvoidHighways(true) .setAvoidFerries(true))) .addOrigins(RouteMatrixOrigin.newBuilder().setWaypoint(createWaypointForLatLng(37.403184, -122.097371))) .addDestinations(RouteMatrixDestination.newBuilder() .setWaypoint(createWaypointForLatLng(37.420999, -122.086894))) .addDestinations(RouteMatrixDestination.newBuilder() .setWaypoint(createWaypointForLatLng(37.383047, -122.044651))) .setTravelMode(RouteTravelMode.DRIVE).setRoutingPreference(RoutingPreference.TRAFFIC_AWARE).build(); Iterator<RouteMatrixElement> elements; try { logger.info("About to send request: " + request.toString()); elements = blockingStub.withDeadlineAfter(2000, TimeUnit.MILLISECONDS).computeRouteMatrix(request); } catch (StatusRuntimeException e) { logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus()); return; } while (elements.hasNext()) { logger.info("Element response: " + elements.next().toString()); } } public static void main(String[] args) throws Exception { String apiKey = System.getenv("INSERT_API_KEY_HERE"); // The standard TLS port is 443 Channel channel = NettyChannelBuilder.forAddress("routes.googleapis.com", 443).build(); channel = ClientInterceptors.intercept(channel, new RoutesInterceptor(apiKey)); RoutesClient client = new RoutesClient(channel); client.computeRoutes(); client.computeRouteMatrix(); } }
C#
C# を使用した例については、Google.Maps.Routing.V2 をご覧ください。
Node.js
const protoPath = "YOUR_PROTO_PATH"; const grpc = require("@grpc/grpc-js"); const protoLoader = require("@grpc/proto-loader"); const packageDefinition = protoLoader.loadSync(protoPath, { keepCase: true, longs: String, enums: String, defaults: true, oneofs: true, }); const protoDescriptor = grpc.loadPackageDefinition(packageDefinition).google.maps.routing.v2; const metadata = new grpc.Metadata(); const host = "routes.googleapis.com:443"; const apiKey = "YOUR_API_KEY"; const fieldMask = "*"; let ComputeRoutesRequest = { origin: { location: { lat_lng: { latitude: -37.816, longitude: 144.964, }, }, }, destination: { location: { lat_lng: { latitude: -37.815, longitude: 144.966, }, }, }, routing_preference: "TRAFFIC_AWARE", travel_mode: "DRIVE", }; const ssl_creds = grpc.credentials.createSsl(); const call_creds = grpc.credentials.createFromMetadataGenerator( function (args, callback) { metadata.set("X-Goog-Api-Key", apiKey); metadata.set("X-Goog-Fieldmask", fieldMask); metadata.set("Content-Type", "application/json"); callback(null, metadata); }, ); const credentials = grpc.credentials.combineChannelCredentials( ssl_creds, call_creds, ); const client = new protoDescriptor.Routes(host, credentials); client.ComputeRoutes(ComputeRoutesRequest, (error, response) => { if (error) { console.log(error); return; } else if (response) { console.log(response); } });