我正在尝试使用以下代码获取google驱动器文件列表但我收到了错误消息 执行请求失败：https://docs.google.com/feeds/default/private/full?max-results=2000
之前它正在运作但是从最近几个月起它无法正常工作我无法理解我哪里出错了。请帮助我
OAuth2Parameters parameters = new OAuth2Parameters()
{
ClientId = "MYID.apps.googleusercontent.com",
ClientSecret = "MYSECREAT",
RedirectUri = currentURL,//"http://localhost:6692/Home.html"
Scope = "https://docs.google.com/feeds/ ",
State = "documents",
AccessType = "offline",//offline means it creats a refreshtoken
TokenExpiry = DateTime.Now.AddYears(1)
};
parameters.AccessCode = code;
Google.GData.Client.OAuthUtil.GetAccessToken(parameters);
GOAuth2RequestFactory requestFactory = new GOAuth2RequestFactory(null, "NAME", parameters);
DocumentsService service = new DocumentsService("NAME");
service.RequestFactory = requestFactory;
//requestFactory.CustomHeaders["Authorization"] = "Bearer " + parameters.AccessToken;
DocumentsListQuery query = new DocumentsListQuery();
query.NumberToRetrieve = 2000;
// Make a request to the API and get all documents.
//I Got an error in following line
DocumentsFeed feed = service.Query(query);
答案 0 :(得分：3)
您的部分问题是您正在使用旧的Gdata调用。虽然旧的GData API仍然很难让它与Oauth2一起工作，因为你不能再使用客户端登录了，而且当客户端登录是一个选项时它就会被恢复。
我建议使用使用新Google Drive Rest API
的Google .net客户端库PM> Install-Package Google.Apis.Drive.v2
与Oauth2类连接：
/// <summary>
/// Authenticate to Google Using Oauth2
/// Documentation https://developers.google.com/accounts/docs/OAuth2
/// </summary>
/// <param name="clientId">From Google Developer console https://console.developers.google.com</param>
/// <param name="clientSecret">From Google Developer console https://console.developers.google.com</param>
/// <param name="userName">A string used to identify a user.</param>
/// <returns></returns>
public static DriveService AuthenticateOauth(string clientId, string clientSecret, string userName)
{
//Google Drive scopes Documentation: https://developers.google.com/drive/web/scopes
string[] scopes = new string[] { DriveService.Scope.Drive, // view and manage your files and documents
DriveService.Scope.DriveAppdata, // view and manage its own configuration data
DriveService.Scope.DriveAppsReadonly, // view your drive apps
DriveService.Scope.DriveFile, // view and manage files created by this app
DriveService.Scope.DriveMetadataReadonly, // view metadata for files
DriveService.Scope.DriveReadonly, // view files and documents on your drive
DriveService.Scope.DriveScripts }; // modify your app scripts
try
{
// here is where we Request the user to give us access, or use the Refresh Token that was previously stored in %AppData%
UserCredential credential = GoogleWebAuthorizationBroker.AuthorizeAsync(new ClientSecrets { ClientId = clientId, ClientSecret = clientSecret }
, scopes
, userName
, CancellationToken.None
, new FileDataStore("Daimto.Drive.Auth.Store")).Result;
DriveService service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "Daimto Drive API Sample",
});
return service;
}
catch (Exception ex)
{
Console.WriteLine(ex.InnerException);
return null;
}
}
连接
// Connect with Oauth2 Ask user for permission
String CLIENT_ID = "xxx-d0vpdthl4ms0soutcrpe036ckqn7rfpn.apps.googleusercontent.com";
String CLIENT_SECRET = "NDmluNfTgUk6wgmy7cFo64RV";
DriveService service = Authentication.AuthenticateOauth(CLIENT_ID, CLIENT_SECRET, Environment.UserName);
列出文件方法：
/// Documentation Search: https://developers.google.com/drive/web/search-parameters
/// </summary>
/// <param name="service">a Valid authenticated DriveService</param>
/// <param name="search">if Search is null will return all files</param>
/// <returns></returns>
public static IList<File> GetFiles(DriveService service, string search)
{
IList<File> Files = new List<File>();
try
{
//List all of the files and directories for the current user.
// Documentation: https://developers.google.com/drive/v2/reference/files/list
FilesResource.ListRequest list = service.Files.List();
list.MaxResults = 1000;
if (search != null)
{
list.Q = search;
}
FileList filesFeed = list.Execute();
//// Loop through until we arrive at an empty page
while (filesFeed.Items != null)
{
// Adding each item to the list.
foreach (File item in filesFeed.Items)
{
Files.Add(item);
}
// We will know we are on the last page when the next page token is
// null.
// If this is the case, break.
if (filesFeed.NextPageToken == null)
{
break;
}
// Prepare the next page of results
list.PageToken = filesFeed.NextPageToken;
// Execute and process the next page request
filesFeed = list.Execute();
}
}
catch (Exception ex) {
// In the event there is an error with the request.
Console.WriteLine(ex.Message);
}
return Files;
}
列出文件：
// Listing files with search.
// This searches for a directory with the name DiamtoSample
string Q = "title = 'DiamtoSample' and mimeType = 'application/vnd.google-apps.folder'";
IList<File> _Files = DaimtoGoogleDriveHelper.GetFiles(service, Q);
foreach (File item in _Files)
{
Console.WriteLine(item.Title + " " + item.MimeType);
}
有用的链接