如何使用 Google Drive V3 恢复（清除垃圾）文件？

Question

我正在使用 C# Google Drive V3 Api。我需要从垃圾箱中恢复一些文件。我能够以编程方式找到已删除的文件，但找不到任何

Untrash

或

Restore

或类似的方法。我能找到的与垃圾箱相关的唯一方法是

EmptyTrash

，如下图所示。那我该如何恢复文件呢？

代码

public void Restore(DateTime from, DateTime to)
{
    var driveService = DriveServiceFactory.Create();
    foreach (var file in GetTrashedFiles(from, to))
    {
        var newFileMetadata = new GoogleDrive.Data.File { Id = file.Id, Trashed = false };
        var updateReq = driveService.Files.Update(fnewFileMetadata, file.Id);

        updateReq.AddParents = string.Join(",", file.Parents);
        updateReq.Execute();
    }
}

public static class DriveServiceFactory
{
    public static DriveService Create()
    {
        UserCredential credential;
        using (var stream = new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
        {
            string credPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
            credPath = Path.Combine(credPath, ".credentials/drive-dotnet-quickstart.json");

            credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                clientSecrets: GoogleClientSecrets.Load(stream).Secrets,
                scopes: new[] { DriveService.Scope.Drive, DriveService.Scope.DriveFile, DriveService.Scope.DriveMetadata },
                user: "user",
                taskCancellationToken: CancellationToken.None,
                dataStore: new FileDataStore(credPath, true)
                ).Result;
            Console.WriteLine("Credential file saved to: " + credPath);
        }

        var driveService = new DriveService(new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName = "MyApp",
        });

        return driveService;
    }
}

private IEnumerable<GoogleDrive.Data.File> GetTrashedFiles(DateTime @from, DateTime to)
{
    var fileFieldsToQuery = "id, name, mimeType, size, createdTime, modifiedTime, md5Checksum, permissions(id, displayName, emailAddress, role), parents, trashed, trashedTime, trashingUser";

    var listRequest = _driveService.Files.List();
    listRequest.PageSize = 1000;
    listRequest.Fields = $"nextPageToken, files({fileFieldsToQuery})";
    listRequest.Q = "trashed=true";
    var filesFeed = listRequest.Execute();
    while (filesFeed.Files != null)
    {
        foreach (var file in filesFeed.Files)
        {
            if (file.Trashed.Value && @from <= file.ModifiedTime && file.ModifiedTime <= to)
                yield return file;
        }

        // last page
        if (filesFeed.NextPageToken == null)
        {
            break;
        }

        // prepare the next page of results
        listRequest.PageToken = filesFeed.NextPageToken;

        // get next page
        filesFeed = listRequest.Execute();
    }
}

Answer 1

建议：使用

files.update

方法

与 V2 不同，Drive API V3 没有恢复垃圾文件的特定方法。不过，我建议使用

files.update

方法来恢复垃圾箱中的文件。在调用该方法之前，请确保请求正文包含具有以下内容的文件元数据：

{
  "id" = "file_id";
  "trashed" = false;
}

参考资料：

• 文件.更新

• 文件资源