C#Google云端硬盘APIv3上传文件 [英] C# Google Drive APIv3 Upload File
问题描述
我正在制作一个简单的应用程序，该应用程序链接到Google云端硬盘帐户，然后可以将文件上传到任何目录并使用(直接)下载链接进行响应. 我已经有了User Credentials和DriveService对象，但似乎找不到任何好的示例或文档.在APIv3上.
I'm making a simple Application that Links to a Google Drive Account and then can Upload Files to any Directory and respond with a (direct) download Link. I already got my User Credentials and DriveService objects, but I can't seem to find any good examples or Docs. on the APIv3.
由于我对OAuth不太熟悉，我想就如何立即上传具有byte[]内容的文件寻求一个清晰明确的解释.
As I'm not very familiar with OAuth, I'm asking for a nice and clear explanation on how to Upload a File with byte[] content now.
我的用于将应用程序链接到Google云端硬盘帐户的代码:(不确定是否可以正常运行)
UserCredential credential;
string dir = Directory.GetCurrentDirectory();
string path = Path.Combine(dir, "credentials.json");
File.WriteAllBytes(path, Properties.Resources.GDJSON);
using(var stream = new FileStream(path, FileMode.Open, FileAccess.Read)) {
string credPath = Path.Combine(dir, "privatecredentials.json");
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
Scopes,
"user",
CancellationToken.None,
new FileDataStore(credPath, true)).Result;
}
// Create Drive API service.
_service = new DriveService(new BaseClientService.Initializer() {
HttpClientInitializer = credential,
ApplicationName = ApplicationName,
});
File.Delete(path);
到目前为止，我的上传代码:(显然无效)
public void Upload(string name, byte[] content) {
Google.Apis.Drive.v3.Data.File body = new Google.Apis.Drive.v3.Data.File();
body.Name = name;
body.Description = "My description";
body.MimeType = GetMimeType(name);
body.Parents = new List() { new ParentReference() { Id = _parent } };
System.IO.MemoryStream stream = new System.IO.MemoryStream(content);
try {
FilesResource.InsertMediaUpload request = _service.Files.Insert(body, stream, GetMimeType(_uploadFile));
request.Upload();
return request.ResponseBody;
} catch(Exception) { }
}
谢谢！
推荐答案
Once you have enabled your Drive API, registered your project and obtained your credentials from the Developer Consol, you can use the following code for recieving the user's consent and obtaining an authenticated Drive Service
string[] scopes = new string[] { DriveService.Scope.Drive,
DriveService.Scope.DriveFile};
var clientId = "xxxxxx"; // From https://console.developers.google.com
var clientSecret = "xxxxxxx"; // From https://console.developers.google.com
// here is where we Request the user to give us access, or use the Refresh Token that was previously stored in %AppData%
var credential = GoogleWebAuthorizationBroker.AuthorizeAsync(new ClientSecrets { ClientId = clientId,
ClientSecret = clientSecret},
scopes,
Environment.UserName,
CancellationToken.None,
new FileDataStore("MyAppsToken")).Result;
//Once consent is recieved, your token will be stored locally on the AppData directory, so that next time you wont be prompted for consent.
DriveService service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "MyAppName",
});
service.HttpClient.Timeout = TimeSpan.FromMinutes(100);
//Long Operations like file uploads might timeout. 100 is just precautionary value, can be set to any reasonable value depending on what you use your service for.
以下是用于上传到云端硬盘的有效代码段.
Following is a working piece of code for uploading to Drive.
// _service: Valid, authenticated Drive service
// _uploadFile: Full path to the file to upload
// _parent: ID of the parent directory to which the file should be uploaded
public static Google.Apis.Drive.v2.Data.File uploadFile(DriveService _service, string _uploadFile, string _parent, string _descrp = "Uploaded with .NET!")
{
if (System.IO.File.Exists(_uploadFile))
{
File body = new File();
body.Title = System.IO.Path.GetFileName(_uploadFile);
body.Description = _descrp;
body.MimeType = GetMimeType(_uploadFile);
body.Parents = new List<ParentReference>() { new ParentReference() { Id = _parent } };
byte[] byteArray = System.IO.File.ReadAllBytes(_uploadFile);
System.IO.MemoryStream stream = new System.IO.MemoryStream(byteArray);
try
{
FilesResource.InsertMediaUpload request = _service.Files.Insert(body, stream, GetMimeType(_uploadFile));
request.Upload();
return request.ResponseBody;
}
catch(Exception e)
{
MessageBox.Show(e.Message,"Error Occured");
}
}
else
{
MessageBox.Show("The file does not exist.","404");
}
}
以下是确定MimeType的小功能:
Here's the little function for determining the MimeType:
private static string GetMimeType(string fileName)
{
string mimeType = "application/unknown";
string ext = System.IO.Path.GetExtension(fileName).ToLower();
Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext);
if (regKey != null && regKey.GetValue("Content Type") != null)
mimeType = regKey.GetValue("Content Type").ToString();
return mimeType;
}
此外，您可以注册ProgressChanged事件并获取上传状态.
Additionally, you can register for the ProgressChanged event and get the upload status.
request.ProgressChanged += UploadProgessEvent;
request.ChunkSize = FilesResource.InsertMediaUpload.MinimumChunkSize; // Minimum ChunkSize allowed by Google is 256*1024 bytes. ie 256KB.
还有
private void UploadProgessEvent(Google.Apis.Upload.IUploadProgress obj)
{
label1.Text = ((obj.ByteSent*100)/TotalSize).ToString() + "%";
// do updation stuff
}
在上传中就差不多了.
来源.
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