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我想使用新的Calendar API v3列出日曆活動。我已閱讀該文章（Calendar API v3, 2-legged OAuth & Java），並以同樣的方式進行了身份驗證。請參閱我廠：列出針對不同用戶的Google日曆活動
import java.io.IOException;
import com.gene.herder.google.GoogleApiSettings;
import com.google.api.client.auth.oauth.OAuthHmacSigner;
import com.google.api.client.auth.oauth.OAuthParameters;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.calendar.Calendar;
import com.google.api.services.calendar.Calendar.Builder;
import com.google.api.services.calendar.CalendarRequest;
import com.google.api.services.calendar.CalendarRequestInitializer;
public final class CalendarApiFactory {
private GoogleApiSettings settings;
public CalendarApi createCalendarApi() {
Calendar calendar = createBuilder(settings).build();
CalendarApi calendarApi = new CalendarApi();
calendarApi.setCalendar(calendar);
return calendarApi;
}
private Builder createBuilder(GoogleApiSettings settings) {
HttpTransport transport = new NetHttpTransport();
JacksonFactory jsonFactory = new JacksonFactory();
OAuthParameters oauthParameters = createOAuthParameters(settings);
Builder builder = new Builder(transport, jsonFactory, oauthParameters);
builder.setApplicationName("MY-COMPANY-MY-APP/1.0");
builder.setCalendarRequestInitializer(new SettingsCalendarRequestInitializer(settings));
return builder;
}
private OAuthParameters createOAuthParameters(GoogleApiSettings settings) {
OAuthParameters oauthParameters = new OAuthParameters();
oauthParameters.version = "1";
oauthParameters.consumerKey = settings.getClientKey();
oauthParameters.signer = createSigner(settings);
return oauthParameters;
}
private OAuthHmacSigner createSigner(GoogleApiSettings settings) {
OAuthHmacSigner signer = new OAuthHmacSigner();
signer.clientSharedSecret = settings.getClientSecret();
return signer;
}
public void setSettings(GoogleApiSettings settings) {
this.settings = settings;
}
}
class SettingsCalendarRequestInitializer extends CalendarRequestInitializer {
private GoogleApiSettings settings;
public SettingsCalendarRequestInitializer(GoogleApiSettings settings) {
this.settings = settings;
}
@Override
protected void initializeCalendarRequest(CalendarRequest<?> request) throws IOException {
request.setKey(settings.getApiKey());
}
}
之後，我以這種方式實現的CalendarApi：
import java.io.IOException;
import com.google.api.client.util.ArrayMap;
import com.google.api.services.calendar.Calendar;
import com.google.api.services.calendar.Calendar.Events.Insert;
import com.google.api.services.calendar.Calendar.Events.List;
import com.google.api.services.calendar.model.Event;
import com.google.api.services.calendar.model.Events;
public class CalendarApi {
private Calendar calendar;
public Events listEvents(String calendarId) throws IOException {
// Add the xoauth_requestor_id query parameter to let the API know
// on behalf of which user the request is being made.
ArrayMap<String, Object> customKeys = new ArrayMap<String, Object>();
customKeys.add("xoauth_requestor_id", calendarId);
List events = calendar.events().list("primary");
events.setUnknownKeys(customKeys);
return events.execute();
}
public void setCalendar(Calendar calendar) {
this.calendar = calendar;
}
}
我的域的配置是這樣的：
高級工具=>管理第三方OAuth客戶端訪問 
和我的控制檯API看起來像這樣：
現在，如果我調用我listEvents法「[email protected]」參數一切正常確定。我可以看到指定日曆中的所有事件。
但是，當我通過任何其他域用戶時，我總是收到「無效憑證」異常。堆棧跟蹤：
com.google.api.client.googleapis.json.GoogleJsonResponseException: 401 Unauthorized
{
"code" : 401,
"errors" : [ {
"domain" : "global",
"location" : "Authorization",
"locationType" : "header",
"message" : "Invalid Credentials",
"reason" : "authError"
} ],
"message" : "Invalid Credentials"
}
at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:143) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:115) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:40) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest$1.interceptResponse(AbstractGoogleClientRequest.java:309) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1090) ~[google-http-client-1.13.1-beta.jar:1.13.1-beta]
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:407) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:340) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:458) ~[google-api-client-1.13.2-beta.jar:1.13.2-beta]
at com.gene.herder.google.calendar.CalendarApi.listEvents(CalendarApi.java:31) ~[CalendarApi.class:na]
我的Maven依賴關係是這樣的：
<!-- Google API -->
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-calendar</artifactId>
<version>v3-rev22-1.13.2-beta</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-jackson2</artifactId>
<version>1.13.1-beta</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client-jetty</artifactId>
<version>1.13.1-beta</version>
</dependency>
爲什麼它不工作？我認爲我可以爲任何我想要的用戶使用該API。我犯了什麼錯誤？