谷歌云端硬盘 - 403权限不足上传文件，但未创建文件夹

Question

我正在尝试使用专用应用数据文件夹将Google云端硬盘支持添加到我的一个应用中。我使用 GIDSignIn 类登录，范围设置为 kGTLRAuthScopeDriveAppdata。登录后，我可以创建文件夹并获取显示文件夹存在的文件列表，然后我可以删除文件夹，文件列表显示它们已消失。但是由于某种原因，当我尝试上传文件时，我收到403错误("用户对此文件没有足够的权限。无论我尝试将文件放入应用数据文件夹的根目录还是我创建的文件夹中，都会发生这种情况。 我已经在谷歌开发者控制台中设置了一个项目。我有一个 API 密钥配置为使用我的应用的捆绑 ID，并为其提供不受限制的 API 访问权限。Google 云端硬盘 API 已启用。

我的代码改编自谷歌自己的示例，所以其中很多可能看起来很熟悉。我已经减少了登录处理，因为这似乎工作正常。

- (instancetype) init
{
self = [super init];
if (!self) return nil;
[GIDSignIn sharedInstance].clientID = (NSString *)kGoogleClientId;
//kGoogleClientId is the ID from the developer console.
[GIDSignIn sharedInstance].delegate = self;
[GIDSignIn sharedInstance].scopes = @[kGTLRAuthScopeDriveAppdata];
return self;
}

//GIDSignInDelegate method
- (void) signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error
{   
authenticatedUser = user;   //authenticatedUser is an instance variable
NSLog(@"Signed in to Google Drive with user %@", user.profile.name);
[delegate GoogleDriveDidSignIn:self];
}

- (GTLRDriveService *) driveService
{
static GTLRDriveService *service;
static dispatch_once_t onceToken;
dispatch_once(&onceToken,
^{
service = [[GTLRDriveService alloc] init];
service.APIKey = (NSString *)kGoogleApiKey;
//kGoogleApiKey matches the developer console too. It has unrestricted API access and is tied to my bundle ID
service.APIKeyRestrictionBundleID = [[NSBundle mainBundle] bundleIdentifier];
service.shouldFetchNextPages = YES;
service.retryEnabled = YES;
});
service.authorizer = authenticatedUser.authentication.fetcherAuthorizer;
//authenticatedUser is an instance variable which stores the user information returned by
//GIDSignIn when the user signs in
return service;
}

- (void) createFolderNamed:(NSString *)folderName completionHandler:(void(^)(NSString *foldername, NSString *newFolderId))completionHandler
{
GoogleDriveHandler * __weak weakself = self;
GTLRDriveService *service = [self driveService];
GTLRDrive_File *folder = [GTLRDrive_File object];
folder.name = folderName;
folder.mimeType = (NSString *)kMimeType_GoogleDriveFolder;
folder.parents = @[@"appDataFolder"];
GTLRDriveQuery_FilesCreate *query = [GTLRDriveQuery_FilesCreate queryWithObject:folder uploadParameters:nil];
[service executeQuery:query completionHandler:^(GTLRServiceTicket * _Nonnull callbackTicket, id  _Nullable object, NSError * _Nullable callbackError)
{
if (callbackError)
{
NSLog(@"-createFolderNamed: callbackError: %@", callbackError.localizedDescription);
}
else
{
GTLRDrive_File *createdFolder = (GTLRDrive_File *)object;
if ( [createdFolder.mimeType isEqualToString:(NSString *)kMimeType_GoogleDriveFolder] )
{
NSLog(@"Google Drive created folder named "%@" with identifier "%@" and mime-type "%@"", createdFolder.name, createdFolder.identifier, createdFolder.mimeType);
}
else
{
NSLog(@"Error : Attempted to create folder, but Google Drive created item named "%@" with identifier "%@" and mime-type "%@"", createdFolder.name, createdFolder.identifier, createdFolder.mimeType);
}
}
}];
}

- (void) writeFileAtUrl:(NSURL *)source toFolderWithId:(NSString *)folderId completionHandler:(void(^)(NSString *filename, NSString *newFileId))completionHandler
{
GoogleDriveHandler * __weak weakself = self;
GTLRDriveService *service = [self driveService];
GTLRDrive_File *file = [GTLRDrive_File object];
file.name = source.lastPathComponent;
file.mimeType = @"binary/octet-stream";
file.parents = @[folderId];
file.spaces = @[@"appDataFolder"];
GTLRUploadParameters *parameters = [GTLRUploadParameters uploadParametersWithFileURL:source MIMEType:@"binary/octet-stream"];
parameters.shouldUploadWithSingleRequest = YES;
GTLRDriveQuery_FilesCreate *query = [GTLRDriveQuery_FilesCreate queryWithObject:file uploadParameters:parameters];
query.fields = @"id";
[service executeQuery:query completionHandler:^(GTLRServiceTicket * _Nonnull callbackTicket, id  _Nullable object, NSError * _Nullable callbackError)
{
if (callbackTicket.statusCode == 200)
{
GTLRDrive_File *createdFile = (GTLRDrive_File *)object;
NSLog(@"Wrote file %@ in Google Drive folder %@", createdFile.name, folderId);
if (completionHandler) completionHandler(createdFile.name, createdFile.identifier);
}
else
{
NSLog(@"-writeFileAtUrl:toFolderWithId:completionHandler:  status code = %li : callbackError: %@", callbackTicket.statusCode, callbackError.localizedDescription);
}
}];
}

例如，我尝试在GIDSignIn登录后执行此操作：

NSURL *sampleFile = [[NSBundle mainBundle] URLForResource:@"AValidTestFile" withExtension:@"png"];
if (sampleFile)
{
[self writeFileAtUrl:sampleFile toFolderWithId:@"appDataFolder" completionHandler:^(NSString *filename, NSString *newFileId)
{
NSLog(@"Uploaded file %@ with ID %@", filename, newFileId);
}];
}

我仍然只是收到 403 错误。 在这一点上，我已经阅读了大量几种不同编程语言的教程、博客文章和论坛帖子。我已经多次检查了自己的代码，并添加了大量日志记录语句来仔细检查所有内容，但是我无法弄清楚如何有权创建文件夹，但不能将文件放入其中。

---

过了一会儿...
如果您在 Google 控制台中浏览凭据向导(而不是仅仅选择 iOS 凭据，因为您正在创建 iOS 应用(，则会收到一条消息，指出"无法从 iOS 安全地访问应用程序数据。请考虑选择其他平台"，它拒绝为您创建凭据。尽管 SDK 具有必要的常量，但这是否有可能不起作用？

Answer 1

对于那些跟随我的人，我想我已经得出结论，在iOS中使用appDataFolder是行不通的。 切换到使用驱动器空间中的文件夹后，我还发现 GTLRUploadParameters 的-uploadParametersWithFileURL:MIMEType:方法不起作用。当我使用它时，我会在驱动器的根目录中获得一个名为"Untitled"的文件(包含我在GTLRDrive_File对象中设置的文件元数据(。一旦我切换到-uploadParametersWithData:MIMEType:我就在正确的位置得到了正确的文件。 我想到目前为止的教训是，如果某些东西不起作用，假设它是SDK。