Trying to send email using the Gmail API into App Engine. Previously I created a Service account key into Credentials page, it generates a .P12 file which is in setServiceAccountPrivateKeyFromP12File parameter. It has a ID key joined to the account [email protected] into Service account page. The code:
/* Application name. */ private static final String APPLICATION_NAME = "appnamefromappengine"; String emailAddress = "[email protected]"; JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance(); try { HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport(); Set<String> scopes = new HashSet<String>(); scopes.add(GmailScopes.GMAIL_SEND); scopes.add(GmailScopes.GMAIL_COMPOSE); scopes.add(GmailScopes.MAIL_GOOGLE_COM); scopes.add("https://www.googleapis.com/auth/admin.directory.user";); GoogleCredential credential = new GoogleCredential.Builder() .setTransport(httpTransport) .setJsonFactory(JSON_FACTORY) .setServiceAccountId(emailAddress) .setServiceAccountPrivateKeyFromP12File(new File( "/home/myuser/Test/src/main/webapp/resources/**somename**cd30e7118ad5.p12")) .setServiceAccountScopes(scopes) .setServiceAccountUser("[email protected]") .build(); Gmail gmail = new Gmail .Builder(httpTransport, JSON_FACTORY, credential) .setApplicationName(APPLICATION_NAME) .build(); Properties props = new Properties(); Session session = Session.getDefaultInstance(props, null); MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress("[email protected]")); message.addRecipient(javax.mail.Message.RecipientType.TO, new InternetAddress("[email protected]")); message.setSubject("Test Mail"); message.setText("Test Mail"); sendMessage(gmail, "[email protected]", message); Message message = createMessageWithEmail(email); //createMessageWithEmail function from Gmail API message = service.users().messages().send(userId, message).execute(); } catch (GeneralSecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (MessagingException e) { // TODO Auto-generated catch block e.printStackTrace(); } It returns me this error: com.google.api.client.googleapis.json.GoogleJsonResponseException: 400 Bad Request { "code" : 400, "errors" : [ { "domain" : "global", "message" : "Bad Request", "reason" : "failedPrecondition" } ], "message" : "Bad Request" } -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/f6905e5a-0dca-4564-b85c-d79b8178841f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
