我是Gmail API新手。我需要通过java使用google API添加签名。
我跟着＆amp;尝试https://developers.google.com/gmail/api/quickstart/java并且工作正常。
但是，当我将tis代码集成到上面的链接代码中时。 403错误它正在抛出。
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.gmail.GmailScopes;
import com.google.api.services.gmail.model.*;
import com.google.api.services.gmail.Gmail;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.List;
public class Quickstart {
/** Application name. */
private static final String APPLICATION_NAME =
"Gmail API Java Quickstart";
/** Directory to store user credentials for this application. */
private static final java.io.File DATA_STORE_DIR = new java.io.File(
System.getProperty("user.home"), ".credentials/gmail-java-quickstart");
/** Global instance of the {@link FileDataStoreFactory}. */
private static FileDataStoreFactory DATA_STORE_FACTORY;
/** Global instance of the JSON factory. */
private static final JsonFactory JSON_FACTORY =
JacksonFactory.getDefaultInstance();
/** Global instance of the HTTP transport. */
private static HttpTransport HTTP_TRANSPORT;
/** Global instance of the scopes required by this quickstart.
*
* If modifying these scopes, delete your previously saved credentials
* at ~/.credentials/gmail-java-quickstart
*/
private static final List<String> SCOPES = Arrays.asList(GmailScopes.MAIL_GOOGLE_COM);
static {
try {
HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
} catch (Throwable t) {
t.printStackTrace();
System.exit(1);
}
}
/**
* Creates an authorized Credential object.
* @return an authorized Credential object.
* @throws IOException
*/
public static Credential authorize() throws IOException {
// Load client secrets.
InputStream in =
Quickstart.class.getResourceAsStream("/client_secret.json");
GoogleClientSecrets clientSecrets =
GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));
// Build flow and trigger user authorization request.
GoogleAuthorizationCodeFlow flow =
new GoogleAuthorizationCodeFlow.Builder(
HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
.setDataStoreFactory(DATA_STORE_FACTORY)
.setAccessType("offline")
.build();
Credential credential = new AuthorizationCodeInstalledApp(
flow, new LocalServerReceiver()).authorize("user");
System.out.println(
"Credentials saved to " + DATA_STORE_DIR.getAbsolutePath());
return credential;
}
/**
* Build and return an authorized Gmail client service.
* @return an authorized Gmail client service
* @throws IOException
*/
public static Gmail getGmailService() throws IOException {
Credential credential = authorize();
return new Gmail.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
.setApplicationName(APPLICATION_NAME)
.build();
}
public static void main(String[] args) throws IOException {
// Build a new authorized API client service.
Gmail service = getGmailService();
String user = "me";
ListLabelsResponse listResponse =
service.users().labels().list(user).execute();
// SendAs primaryAlias = null;
// ListSendAsResponse aliases = service.users().settings().sendAs().list("me").execute();
// for (SendAs alias: aliases.getSendAs()) {
// if (alias.getIsPrimary()) {
// primaryAlias = alias;
// break;
// }
// }
// SendAs aliasSettings = new SendAs().setSignature("I heart cats.");
// SendAs result = service.users().settings().sendAs().patch(
// "me",
// primaryAlias.getSendAsEmail(),
// aliasSettings)
// .execute();
// System.out.println("Updated signature for " + result.getDisplayName());
// Print the labels in the user's account.
//ListLabelsResponse listResponse =
// service.users().labels().list(user).execute();
List<Label> labels = listResponse.getLabels();
if (labels.size() == 0) {
System.out.println("No labels found.");
} else {
System.out.println("Labels:");
for (Label label : labels) {
System.out.printf("- %s\n", label.getName());
}
}
}
}
我面临的错误是：
Exception in thread "main" com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden
{
"code" : 403,
"errors" : [ {
"domain" : "global",
"message" : "Insufficient Permission",
"reason" : "insufficientPermissions"
} ],
"message" : "Insufficient Permission"
}
at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:146)
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:113)
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:40)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest$1.interceptResponse(AbstractGoogleClientRequest.java:321)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1065)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:419)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
at Quickstart.main(Quickstart.java:101)
FAILURE: Build failed with an exception.
如何从代码中访问签名并更新我的签名。
答案 0 :(得分：1)
我遇到了同样的错误。
转到/Users/pc-name/.credentials/gmail-java-quickstart
只需删除凭据。
尝试使用基本设置范围。你将访问gmail的设置。
如果您遇到任何问题，请告诉我。
答案 1 :(得分：0)
您可以尝试Managing Aliases。
别名也用于管理帐户的签名。
尝试文档中给出的示例。
SendAs primaryAlias = null;
ListSendAsResponse aliases = gmailService.users().settings().sendAs().list("me").execute();
for (SendAs alias: aliases.getSendAs()) {
if (alias.getIsPrimary()) {
primaryAlias = alias;
break;
}
}
SendAs aliasSettings = new SendAs().setSignature("I heart cats.");
SendAs result = gmailService.users().settings().sendAs().patch(
"me",
primaryAlias.getSendAsEmail(),
aliasSettings)
.execute();
System.out.println("Updated signature for " + result.getDisplayName());
对于错误，您可以查看下面的SO帖子。