我正在尝试使用GAE服务帐户阅读gmail邮件。类似于下面的代码很适合阅读谷歌日历但gmail失败。我在域中只有一个用户(也是管理员帐户)。我正在尝试访问该用户的gmail)。任何有关我的代码失败原因的帮助都会很棒。
我已为以下范围委派了域范围的权限。
Email (Read/Write/Send) https://mail.google.com/
https://www.googleapis.com/auth/admin.directory.user.readonly
Calendar (Read-Write) https://www.googleapis.com/auth/calendar
https://www.googleapis.com/auth/drive
https://www.googleapis.com/auth/userinfo.email
https://www.googleapis.com/auth/userinfo.profile
我在Google App Engine中启用了以下API:
Admin SDK
Calendar API
Drive API
Gmail API
Google Cloud SQL
Google Cloud Storage
Google Cloud Storage JSON API
以下是创建Gmail服务的代码:
// Create HTTP transport
HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
// Create JsonFactory using com.google.api.client.json.jackson2.JacksonFactory
JsonFactory jsonFactory = new JacksonFactory();
// Get service accont (contain service account email and P12 file name)
BaseGoogleService.GoogleServiceAccount serviceAccount = getGoogleServiceAccount();
//load private key from class path to File object.
Resource resource = appContext.getResource("classpath:"+serviceAccount.getServiceAccountPrivateKeyFile());
File privateKeyFile = resource.getFile();
// Create Google credential for service account
List<String> accountScopes = new ArrayList<String>();
accountScopes.add(GmailScopes.MAIL_GOOGLE_COM);
Credential credential = new GoogleCredential.Builder()
.setTransport(httpTransport)
.setJsonFactory(jsonFactory)
.setServiceAccountId(serviceAccount.getServiceAccountId())
.setServiceAccountScopes(accountScopes)
.setServiceAccountPrivateKeyFromP12File(privateKeyFile)
.build();
// Create Gmail client
Gmail gmailClient = new Gmail.Builder(httpTransport, jsonFactory, credential)
.build();
读取gmail消息的代码:
ListMessagesResponse response = gmailClient.users().messages().list(userEmail).setQ(query).execute()
执行此代码时,我遇到错误
com.google.api.client.googleapis.json.GoogleJsonResponseException: 500 OK
{
"code" : 500,
"errors" : [ {
"domain" : "global",
"message" : "Backend Error",
"reason" : "backendError"
} ],
"message" : "Backend Error"
}
at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:145)
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:312)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1049)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:410)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:343)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:460)
答案 0 :(得分:1)
我能够让它发挥作用。
两件事: