Question

我正在尝试建立一个可以包装.NET Google API的类，以便可以使用以前获得的访问令牌访问用户的Google云端硬盘。截至目前，我只是试图使其工作而不再需要刷新令牌（稍后会详细介绍）。最终目标是让某人浏览我设置的网页，以通过直接调用Google Rest API（我存储在数据库中）来获取访问令牌和刷新令牌的身份。然后，他们可以请求将文件上传/下载到其他页面上的云端硬盘中，该页面将首先从数据库中获取适当的信息，然后在访问云端硬盘时使用.NET Google API库。

但是，当我尝试访问其云端硬盘时，出现以下错误：

访问令牌已过期，无法刷新。错误：刷新错误，刷新错误，刷新错误

我知道访问令牌是有效的，因为我在测试过程中仅几秒钟前获得了它。这是我用于设置驱动器服务的代码：

  ' NOTE: Code altered for brevity
  Public Sub Initialize(accessToken As String)
        ' Set up the client secret information based on the default constants
        Dim clientSecrets As New ClientSecrets()
        clientSecrets.ClientId = DEFAULT_CLIENT_ID
        clientSecrets.ClientSecret = DEFAULT_CLIENT_SECRET

        ' Set up a token based on the token data we got
        ' NOTE: Is it OK to leave some strings as NULL?
        Dim token As New Responses.TokenResponse()
        token.AccessToken = accessToken
        token.RefreshToken = ""
        token.TokenType = "Bearer"
        token.IssuedUtc = DateTime.Now
        token.ExpiresInSeconds = 3600
        token.Scope = "drive"
        token.IdToken = ""

        ' Set up a flow for the user credential
        Dim init As New GoogleAuthorizationCodeFlow.Initializer()
        init.ClientSecrets = clientSecrets
        init.Scopes = New String() {DriveService.Scope.Drive}
        init.Clock = Google.Apis.Util.SystemClock.Default

        ' Set up everything else and initialize the service
        Dim baseInit As New BaseClientService.Initializer()
        baseInit.HttpClientInitializer = New UserCredential(New GoogleAuthorizationCodeFlow(init), "user", token)
        baseInit.ApplicationName = APP_NAME

        _service = New DriveService(baseInit)
  End Sub

此后不久，我使用下面的代码请求一个文件夹，以便检查该文件夹是否存在。

  Private Function GetDriveFolder(folderPath As String, ByRef folderIds As String(), Optional createMissingFolders As Boolean = False, Optional parentFolderId As String = "root") As Data.File
    Dim creatingFolderPath As Boolean = False
    Dim currentFolder As Data.File = Nothing
    Dim folderPathSplit As String() = folderPath.Replace("/", "\").Trim("\").Split("\")
    Dim folderIdList As New List(Of String)
    folderIds = {}

    ' Loop through each folder in the path and seek each out until we reach the end
    For x As Integer = 0 To folderPathSplit.Length - 1
        Dim result As FileList = Nothing

        If Not creatingFolderPath Then
            ' Build a list request which we will use to seek out the next folder
            Dim request As FilesResource.ListRequest = _service.Files.List()
            request.Q = "mimeType='application/vnd.google-apps.folder' and name='" & folderPathSplit(x) & "'"
            If currentFolder Is Nothing Then
                request.Q &= " and '" & EscapeDriveValue(parentFolderId) & "' in parents"
            Else
                request.Q &= " and '" & EscapeDriveValue(currentFolder.Id) & "' in parents"
            End If
            request.Spaces = "drive"
            request.Fields = "files(id, name)"

            ' Execute the search, we should only get a single item back
            ' NOTE: Error thrown on this request
            result = request.Execute()
        End If
        ' So on.....

因此，我暂时仅尝试使其仅与访问令牌一起使用，因为如果它最终得到刷新，则需要知道以便更新数据库。但是，如果确实包含刷新令牌，则会出现以下错误：

错误：“ unauthorized_client”，说明：“未经授权”，Uri：“”

我猜想这与通过开发控制台配置应用程序的方式有关，但是如果我通过启动启动浏览器以获取我的凭据的Google API库进行身份验证，则一切正常。因此，我真的不确定从这里去哪里，因为我还没有发现任何人遇到类似的问题，而且指南也没有介绍指定您自己的访问令牌。

另外，作为一个简短的说明，这是我在让用户进行身份验证时使用的URL：

String.Format("https://accounts.google.com/o/oauth2/v2/auth?client_id={0}&state={1}&redirect_uri={2}&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fdrive&access_type=offline&include_granted_scopes=true&prompt=select_account%20consent&response_type=code", GOOGLEAPI_CLIENTID, validateState, redirectUri)

感谢您的帮助！

Answer 1

如果您有访问令牌，那么创建Google凭据的最简单方法是使用GoogleCredential.FromAccessToken()方法，并传入访问令牌。

这将返回一个GoogleCredential实例，您可以在构建HttpClientInitializer时使用它来设置DriveService属性。

如果访问驱动器服务时仍然出现错误，则可能是您请求访问令牌的方式有误。

.NET Google API访问令牌失败，未指定刷新令牌

1 个答案: