Yetkilendirme jetonları alma
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Consumer SDK, JSON Web Jetonları kullanarak yetkilendirme sağlar. JSON Web Token (JWT), bir hizmetle ilgili bir veya daha fazla talep sağlayan bir yetkilendirme jetonudur.
Tüketici SDK'sı, Fleet Engine ile iletişim kurmak için uygulama tarafından sağlanan JSON Web Token'ı kullanır. Fleet Engine sunucusu tarafından beklenen jetonlarla ilgili ayrıntılar için JSON Web Jetonları ve JSON Web Jetonları Oluşturma başlıklı makaleleri inceleyin.
Yetkilendirme jetonu, aşağıdaki Fleet Engine hizmetlerine erişim sağlar:
TripService
: Tüketici SDK'sına, araç konumu, rota ve tahmini varış zamanı dahil olmak üzere seyahat ayrıntılarına erişim izni verir. Gezi hizmeti için yetkilendirme jetonları, jetonun authorization
üstbilgisinde bir tripid:TRIP_ID
talebi içermelidir. Burada TRIP_ID
, paylaşılan isteğe bağlı geziye ait gezi kimliğidir.
VehicleService
: Araç yoğunluğu katmanını görüntülemek ve teslim alma noktası tahmini varış zamanlarını tahmin etmek için Tüketici SDK'sına yaklaşık araç konumu hakkında bilgi verir. Consumer SDK yalnızca yaklaşık konumları kullandığından araç hizmeti için yetkilendirme jetonları vehicleid
talebi gerektirmez.
Jeton nedir?
Fleet Engine, düşük güvenli ortamlardan (akıllı telefonlar ve tarayıcılar) gelen API yöntemi çağrıları için JSON Web Jetonlarının (JWT'ler) kullanılmasını gerektirir.
JWT, sunucunuzda oluşturulur, imzalanır, şifrelenir ve süresi dolana veya geçerliliğini yitirene kadar sonraki sunucu etkileşimleri için istemciye iletilir.
Önemli ayrıntılar
JSON Web Jetonları hakkında daha fazla bilgi için Fleet Engine Essentials'daki JSON Web Jetonları bölümüne bakın.
Müşteriler jetonları nasıl alır?
Bir sürücü veya tüketici, uygun yetkilendirme kimlik bilgilerini kullanarak uygulamanıza giriş yaptıktan sonra, bu cihazdan verilen tüm güncellemelerde uygun yetkilendirme jetonları kullanılmalıdır. Bu jetonlar, Fleet Engine'e uygulamanın izinlerini bildirir.
Geliştirici olarak, istemci uygulamanızın aşağıdakileri yapabilmesi gerekir:
- Sunucunuzdan bir JSON Web Token alın.
- Jeton yenileme işlemlerini en aza indirmek için jetonun süresi dolana kadar yeniden kullanın.
- Jetonun süresi dolduğunda yenileyin.
AuthTokenFactory
sınıfı, konum güncelleme zamanında yetkilendirme jetonları oluşturur. SDK, Fleet Engine'e gönderilecek güncelleme bilgileriyle birlikte jetonları paketlemelidir. SDK'yı başlatmadan önce sunucu tarafı uygulamanızın jeton verebildiğinden emin olun.
Fleet Engine hizmetinin beklediği jetonlarla ilgili ayrıntılar için Fleet Engine için JSON Web Jetonları Verme başlıklı makaleyi inceleyin.
Yetkilendirme jetonu getirme aracı örneği
Aşağıdaki kod örneğinde, yetkilendirme jetonu geri çağırmasının nasıl uygulanacağı gösterilmektedir.
Java
class JsonAuthTokenFactory implements AuthTokenFactory {
private static final String TOKEN_URL =
"https://yourauthserver.example/token";
private static class CachedToken {
String tokenValue;
long expiryTimeMs;
String tripId;
}
private CachedToken token;
/*
* This method is called on a background thread. Blocking is OK. However, be
* aware that no information can be obtained from Fleet Engine until this
* method returns.
*/
@Override
public String getToken(AuthTokenContext context) {
// If there is no existing token or token has expired, go get a new one.
String tripId = context.getTripId();
if (tripId == null) {
throw new RuntimeException("Trip ID is missing from AuthTokenContext");
}
if (token == null || System.currentTimeMillis() > token.expiryTimeMs ||
!tripId.equals(token.tripId)) {
token = fetchNewToken(tripId);
}
return token.tokenValue;
}
private static CachedToken fetchNewToken(String tripId) {
String url = TOKEN_URL + "/" + tripId;
CachedToken token = new CachedToken();
try (Reader r = new InputStreamReader(new URL(url).openStream())) {
com.google.gson.JsonObject obj
= com.google.gson.JsonParser.parseReader(r).getAsJsonObject();
token.tokenValue = obj.get("ServiceToken").getAsString();
token.expiryTimeMs = obj.get("TokenExpiryMs").getAsLong();
/*
* The expiry time could be an hour from now, but just to try and avoid
* passing expired tokens, we subtract 5 minutes from that time.
*/
token.expiryTimeMs -= 5 * 60 * 1000;
} catch (IOException e) {
/*
* It's OK to throw exceptions here. The error listeners will receive the
* error thrown here.
*/
throw new RuntimeException("Could not get auth token", e);
}
token.tripId = tripId;
return token;
}
}
Kotlin
class JsonAuthTokenFactory : AuthTokenFactory() {
private var token: CachedToken? = null
/*
* This method is called on a background thread. Blocking is OK. However, be
* aware that no information can be obtained from Fleet Engine until this
* method returns.
*/
override fun getToken(context: AuthTokenContext): String {
// If there is no existing token or token has expired, go get a new one.
val tripId =
context.getTripId() ?:
throw RuntimeException("Trip ID is missing from AuthTokenContext")
if (token == null || System.currentTimeMillis() > token.expiryTimeMs ||
tripId != token.tripId) {
token = fetchNewToken(tripId)
}
return token.tokenValue
}
class CachedToken(
var tokenValue: String? = "",
var expiryTimeMs: Long = 0,
var tripId: String? = "",
)
private companion object {
const val TOKEN_URL = "https://yourauthserver.example/token"
fun fetchNewToken(tripId: String) {
val url = "$TOKEN_URL/$tripId"
val token = CachedToken()
try {
val reader = InputStreamReader(URL(url).openStream())
reader.use {
val obj = com.google.gson.JsonParser.parseReader(r).getAsJsonObject()
token.tokenValue = obj.get("ServiceToken").getAsString()
token.expiryTimeMs = obj.get("TokenExpiryMs").getAsLong()
/*
* The expiry time could be an hour from now, but just to try and avoid
* passing expired tokens, we subtract 5 minutes from that time.
*/
token.expiryTimeMs -= 5 * 60 * 1000
}
} catch (e: IOException) {
/*
* It's OK to throw exceptions here. The error listeners will receive the
* error thrown here.
*/
throw RuntimeException("Could not get auth token", e)
}
token.tripId = tripId
return token
}
}
}
Sırada ne var?
Consumer SDK'yı başlatma
Aksi belirtilmediği sürece bu sayfanın içeriği Creative Commons Atıf 4.0 Lisansı altında ve kod örnekleri Apache 2.0 Lisansı altında lisanslanmıştır. Ayrıntılı bilgi için Google Developers Site Politikaları'na göz atın. Java, Oracle ve/veya satış ortaklarının tescilli ticari markasıdır.
Son güncelleme tarihi: 2025-09-05 UTC.
[[["Anlaması kolay","easyToUnderstand","thumb-up"],["Sorunumu çözdü","solvedMyProblem","thumb-up"],["Diğer","otherUp","thumb-up"]],[["İhtiyacım olan bilgiler yok","missingTheInformationINeed","thumb-down"],["Çok karmaşık / çok fazla adım var","tooComplicatedTooManySteps","thumb-down"],["Güncel değil","outOfDate","thumb-down"],["Çeviri sorunu","translationIssue","thumb-down"],["Örnek veya kod sorunu","samplesCodeIssue","thumb-down"],["Diğer","otherDown","thumb-down"]],["Son güncelleme tarihi: 2025-09-05 UTC."],[[["\u003cp\u003eThe Consumer SDK utilizes JSON Web Tokens (JWTs) for authorization to access trip and vehicle data within Fleet Engine.\u003c/p\u003e\n"],["\u003cp\u003eJWTs are generated by your backend server and passed to the client, granting access to specific Fleet Engine services like TripService and VehicleService.\u003c/p\u003e\n"],["\u003cp\u003eClient applications need to implement logic to fetch, reuse, and refresh these tokens to maintain ongoing access to Fleet Engine.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eAuthTokenFactory\u003c/code\u003e is used to generate authorization tokens which must be included in requests sent to Fleet Engine.\u003c/p\u003e\n"],["\u003cp\u003eImplement a secure token fetching mechanism on your server to provide these tokens for the Consumer SDK.\u003c/p\u003e\n"]]],["The Consumer SDK utilizes JSON Web Tokens (JWTs) for authorization with Fleet Engine. These JWTs, provided by your application, grant access to services like `TripService` (requiring a `tripid` claim) and `VehicleService`. Your client must fetch, reuse, and refresh JWTs from your server. The `AuthTokenFactory` class generates and packages these tokens with update information for Fleet Engine. Server-side implementation must issue tokens before SDK initialization, ensuring devices have proper authorization credentials for updates.\n"],null,["The Consumer SDK provides authorization using JSON Web Tokens. A JSON Web Token\n(JWT) is an authorization token that provides one or more claims on a service.\n\nThe Consumer SDK uses the JSON Web Token provided by the application to\ncommunicate with the Fleet Engine. For details of the tokens expected by the\nFleet Engine server, see [JSON Web Tokens](/maps/documentation/mobility/fleet-engine/essentials/set-up-fleet/jwt)\nand [Issue JSON Web tokens](/maps/documentation/mobility/fleet-engine/essentials/set-up-fleet/issue-jwt).\n\nThe authorization token provides access to the following Fleet Engine services:\n\n- **`TripService`** - Gives the Consumer SDK access to trip details, including\n vehicle position, route, and ETA. Authorization tokens for the trip service\n must include a `tripid:TRIP_ID` claim in the token's `authorization` header,\n where `TRIP_ID` is the trip ID of the on-demand trip being shared.\n\n- **`VehicleService`** - Gives the Consumer SDK information about the\n approximate vehicle location for displaying the vehicle density layer and\n estimating pickup point ETAs. Because the Consumer SDK uses only approximate\n locations, authorization tokens for the vehicle service don't require a\n `vehicleid` claim.\n\nWhat is a token?\n\nFleet Engine requires the use of **JSON Web Tokens** (JWTs) for API method calls\nfrom **low-trust environments**: smartphones and browsers.\n\nA JWT originates on your server, is signed, encrypted, and passed to the client\nfor subsequent server interactions until it expires or is no longer valid.\n\n**Key details**\n\n- Use [Application Default Credentials](https://google.aip.dev/auth/4110) to authenticate and authorize against Fleet Engine.\n- Use an appropriate service account to sign JWTs. See [Fleet Engine serviceaccount](/maps/documentation/mobility/fleet-engine/essentials/set-up-fleet/service-accounts#fleet_engine_service_account_roles) roles in **Fleet Engine Basics**.\n\nFor more information about JSON Web Tokens, see [JSON Web Tokens](/maps/documentation/mobility/fleet-engine/essentials/set-up-fleet/jwt) in\n**Fleet Engine Essentials**.\n\nHow do clients get tokens?\n\nOnce a driver or consumer logs in to your app using the appropriate\nauthorization credentials, any updates issued from that device must use\nappropriate authorization tokens, which communicates to Fleet Engine the\npermissions for the app.\n\nAs the developer, your client implementation should provide the ability to do\nthe following:\n\n- Fetch a JSON Web Token from your server.\n- Reuse the token until it expires to minimize token refreshes.\n- Refresh the token when it expires.\n\nThe `AuthTokenFactory` class generates authorization tokens at location update\ntime. The SDK must package the tokens with the update\ninformation to send to Fleet Engine. Make sure that your server-side\nimplementation can issue tokens before initializing the SDK.\n\nFor details of the tokens expected by the Fleet Engine service, see [Issue JSON\nWeb Tokens](/maps/documentation/mobility/fleet-engine/essentials/set-up-fleet/issue-jwt) for Fleet Engine.\n\nExample of an authorization token fetcher\n\nThe following code example demonstrates how to implement an authorization token\ncallback. \n\nJava \n\n class JsonAuthTokenFactory implements AuthTokenFactory {\n\n private static final String TOKEN_URL =\n \"https://yourauthserver.example/token\";\n\n private static class CachedToken {\n String tokenValue;\n long expiryTimeMs;\n String tripId;\n }\n\n private CachedToken token;\n\n /*\n\n * This method is called on a background thread. Blocking is OK. However, be\n * aware that no information can be obtained from Fleet Engine until this\n * method returns.\n */\n @Override\n public String getToken(AuthTokenContext context) {\n // If there is no existing token or token has expired, go get a new one.\n String tripId = context.getTripId();\n if (tripId == null) {\n throw new RuntimeException(\"Trip ID is missing from AuthTokenContext\");\n }\n if (token == null || System.currentTimeMillis() \u003e token.expiryTimeMs ||\n !tripId.equals(token.tripId)) {\n token = fetchNewToken(tripId);\n }\n return token.tokenValue;\n }\n\n private static CachedToken fetchNewToken(String tripId) {\n String url = TOKEN_URL + \"/\" + tripId;\n CachedToken token = new CachedToken();\n\n try (Reader r = new InputStreamReader(new URL(url).openStream())) {\n com.google.gson.JsonObject obj\n = com.google.gson.JsonParser.parseReader(r).getAsJsonObject();\n\n token.tokenValue = obj.get(\"ServiceToken\").getAsString();\n token.expiryTimeMs = obj.get(\"TokenExpiryMs\").getAsLong();\n\n /*\n\n * The expiry time could be an hour from now, but just to try and avoid\n * passing expired tokens, we subtract 5 minutes from that time.\n */\n token.expiryTimeMs -= 5 * 60 * 1000;\n } catch (IOException e) {\n /*\n * It's OK to throw exceptions here. The error listeners will receive the\n * error thrown here.\n */\n throw new RuntimeException(\"Could not get auth token\", e);\n }\n token.tripId = tripId;\n\n return token;\n }\n }\n\nKotlin \n\n class JsonAuthTokenFactory : AuthTokenFactory() {\n\n private var token: CachedToken? = null\n\n /*\n\n * This method is called on a background thread. Blocking is OK. However, be\n * aware that no information can be obtained from Fleet Engine until this\n * method returns.\n */\n override fun getToken(context: AuthTokenContext): String {\n // If there is no existing token or token has expired, go get a new one.\n val tripId =\n context.getTripId() ?:\n throw RuntimeException(\"Trip ID is missing from AuthTokenContext\")\n\n if (token == null || System.currentTimeMillis() \u003e token.expiryTimeMs ||\n tripId != token.tripId) {\n token = fetchNewToken(tripId)\n }\n\n return token.tokenValue\n }\n\n class CachedToken(\n var tokenValue: String? = \"\",\n var expiryTimeMs: Long = 0,\n var tripId: String? = \"\",\n )\n\n private companion object {\n const val TOKEN_URL = \"https://yourauthserver.example/token\"\n\n fun fetchNewToken(tripId: String) {\n val url = \"$TOKEN_URL/$tripId\"\n val token = CachedToken()\n\n try {\n val reader = InputStreamReader(URL(url).openStream())\n\n reader.use {\n val obj = com.google.gson.JsonParser.parseReader(r).getAsJsonObject()\n\n token.tokenValue = obj.get(\"ServiceToken\").getAsString()\n token.expiryTimeMs = obj.get(\"TokenExpiryMs\").getAsLong()\n\n /*\n\n * The expiry time could be an hour from now, but just to try and avoid\n * passing expired tokens, we subtract 5 minutes from that time.\n */\n token.expiryTimeMs -= 5 * 60 * 1000\n }\n } catch (e: IOException) {\n /*\n * It's OK to throw exceptions here. The error listeners will receive the\n * error thrown here.\n */\n throw RuntimeException(\"Could not get auth token\", e)\n }\n\n token.tripId = tripId\n\n return token\n }\n }\n }\n\nWhat's next\n\n[Initialize the Consumer SDK](/maps/documentation/mobility/journey-sharing/on-demand/android/init-sdk)"]]