Sie können eine Route mithilfe der Routes API abrufen, indem Sie das Senden einer HTTP-POST-Anfrage an die computeRoutes-Methode (REST) oder durch das Aufrufen der ComputeRoutes -Methode (gRPC).
Das folgende Beispiel zeigt die URL einer REST-Anfrage an den computeRoutes
:
https://routes.googleapis.com/directions/v2:computeRoutes
Anfrageoptionen in JSON aufnehmen Anfragetext. Der Anfragetext enthält die Quell- und Zielorte sowie alle Optionen die Sie für die Route festlegen möchten. Weitere Informationen Siehe Standorte angeben und Verfügbare Routenoptionen.
Die Antwort enthält die Felder, die Sie in der Antwortfeldmaske angegeben haben.
Mithilfe des URL-Parameters $fields oder der field-Informationen unter Verwendung des
HTTP-gRPC-Header X-Goog-FieldMask. Weitere Informationen finden Sie unter
Wählen Sie aus, welche Informationen zurückgegeben werden sollen.
Ein Beispiel für eine Routenanfrage für öffentliche Verkehrsmittel finden Sie unter Beispiel: Route für öffentliche Verkehrsmittel abrufen
Beispiel: HTTP-Routenanfrage
Der folgende Code zeigt, wie ein Anfragetext für eine computeRoutes In diesem Beispiel legen Sie die Quell- und Zielspeicherorte Geben Sie außerdem Folgendes an:
Ein
travelModevonDRIVEund eine Route, bei der die Verkehrslage berücksichtigt wird.Die Sprache
en-USmitimperialEntfernungseinheiten.Eine Antwortfeldmaske im
X-Goog-FieldMask-Header, die gibt an, dass in der Antwort die folgenden Felder zurückgegeben werden:routes.durationroutes.distanceMetersroutes.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'
Beispiel: Antworttext der HTTP-Route
Der obige Aufruf generiert die folgende JSON-Antwort:
{
"routes": [
{
"distanceMeters": 772,
"duration": "165s",
"polyline": {
"encodedPolyline": "ipkcFfichVnP@j@BLoFVwM{E?"
}
}
]
}
Beispiel: gRPC-Anfrage
gRPC ist ein leistungsstarker, universeller Open-Source-RPC von Google entwickeltes Framework. In gRPC kann eine Clientanwendung direkt in einer Serveranwendung auf einem anderen Computer wie bei einer lokalen -Objekt enthält.
Im Folgenden sehen Sie eine Beispiel-gRPC-Anfrage.
Ok
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#
Ein Beispiel mit C# finden Sie unter Google.Maps.Routing.V2.
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);
}
});