Java google drive api 凭据

Question

我想使用我存储的凭证文件，请帮助我。桌面应用程序。我不明白如何使用保存的凭据。我在谷歌支持上找不到一些说明。

private static final String APPLICATION_NAME
        = "edocsAPI";
private static final java.io.File DATA_STORE_DIR = new java.io.File(
        "E:/", ".credentials/drive-java-quickstart");
private static FileDataStoreFactory DATA_STORE_FACTORY;
private static final JsonFactory JSON_FACTORY
        = JacksonFactory.getDefaultInstance();
private static HttpTransport HTTP_TRANSPORT;
private static final List<String> SCOPES
        = Arrays.asList(DriveScopes.DRIVE_METADATA_READONLY);
static {
    try {
        HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
        DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
    } catch (Throwable t) {
        t.printStackTrace();
    }
}

public static Credential authorize() throws IOException {
    // Load client secrets.
     InputStream in
            = new FileInputStream("E:/client_secret_Rep.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"); 

    return credential;
}

  public static Drive getDriveService() throws IOException {
    Credential credential = 
            authorize();
               System.out.println("getAccessToken" + credential.getAccessToken()); 

                 System.out.println("setAccessToken" +  credential.getAccessToken());
    System.out.println("setExpiresInSeconds" + credential.getExpiresInSeconds());

    System.out.println("setRefreshToken" + credential.getRefreshToken());
    return new Drive.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.
    Drive service = getDriveService(); 
     FileList result = service.files().list()
     .setMaxResults(10)
     .execute();
     List<File> files = result.getItems();
     if (files == null || files.size() == 0) {
     System.out.println("No files found.");
     } else {
     System.out.println("Files:");
     for (File file : files) {
     System.out.printf("%s (%s)\n", file.getTitle(), file.getId() , file.getAlternateLink());
     file.setShared(Boolean.TRUE);
     System.out.println(file.getAlternateLink());
     }
     }

}

我尝试这样做:

GoogleCredential credential = new GoogleCredential.Builder()
            .setTransport(new NetHttpTransport())
            .setJsonFactory(new JacksonFactory())
            .setClientSecrets("Client ID",
                    "ClientSecrets").build();

    credential.setAccessToken("AccessToken");

但是我有一个错误 401

Answer 1

看起来错误是由于访问 token 过期或无效导致的。

Invalid authorization header. The access token you're using is either expired or invalid.

这是 documentation 的内容提示大约 401 错误。

Suggested action: Refresh the access token using the long-lived refresh token. If this fails, direct the user through the OAuth flow, as described in Authorizing Your App with Google Drive.