public static async Task <byte[]> DownloadFileToByteArray(string url)
{
// Create Drive API service.
_service = GoogleDriveService;
// Attempt download
// Iterate through file-list and find the relevant file
FilesResource.ListRequest listRequest = _service.Files.List();
listRequest.Fields = "nextPageToken, files(id, name, mimeType, originalFilename, size)";
Google.Apis.Drive.v3.Data.File lobjGoogleFile = null;
foreach (var item in listRequest.Execute().Files)
{
if (url.IndexOf(string.Format("id={0}", item.Id)) > -1)
{
Console.WriteLine(string.Format("{0}: {1}", item.OriginalFilename, item.MimeType));
lobjGoogleFile = item;
break;
}
}
FilesResource.ExportRequest request = _service.Files.Export(lobjGoogleFile.Id, GOOGLE_MYMETYPE_PDF);
Console.WriteLine(request.MimeType);
using MemoryStream lobjMS = new MemoryStream();
await request.DownloadAsync(lobjMS);
// At this point the MemoryStream has a length of zero?
lobjMS.Position = 0;
return(lobjMS.ToArray());
}
public static async Task DownloadFileById(string id, string lstrDownloadFile)
{
// Create Drive API service.
_service = GoogleDriveService;
var file = _service.Files.Get(id).Execute();
FilesResource.ExportRequest request = _service.Files.Export(file.Id, GOOGLE_MYMETYPE_PDF);
Console.WriteLine(request.MimeType);
MemoryStream lobjMS = new MemoryStream();
await request.DownloadAsync(lobjMS);
// At this point the MemoryStream has a length of zero?
lobjMS.Position = 0;
var lobjFS = new System.IO.FileStream(lstrDownloadFile, System.IO.FileMode.Create, System.IO.FileAccess.Write);
await lobjMS.CopyToAsync(lobjFS);
}
static async Task GetDriveFile(DriveFile driveFileObject, DriveService driveService, string token, dynamic config, string courseName = "Unknown")
{
var fileRequest = driveService.Files.Get(driveFileObject.Id);
fileRequest.OauthToken = token;
var stream = new MemoryStream();
fileRequest.MediaDownloader.ProgressChanged += (Google.Apis.Download.IDownloadProgress progress) => {
switch (progress.Status)
{
case Google.Apis.Download.DownloadStatus.Completed:
{
Console.WriteLine(String.Format("Downloaded {0}.", driveFileObject.Title));
SaveStream(stream, String.Format(@".\output\{0}\{1}", courseName, driveFileObject.Title));
break;
}
case Google.Apis.Download.DownloadStatus.Failed:
{
try {
var driveFile = fileRequest.Execute();
if (config.exportmimes.ContainsKey(driveFile.MimeType))
{
FilesResource.ExportRequest exportRequest = driveService.Files.Export(driveFile.Id, (string)config.exportmimes[driveFile.MimeType]);
exportRequest.OauthToken = token;
exportRequest.MediaDownloader.ProgressChanged += (Google.Apis.Download.IDownloadProgress exportProgress) => {
switch (exportProgress.Status)
{
case Google.Apis.Download.DownloadStatus.Completed:
{
Console.WriteLine(String.Format("Downloaded {0}.{1}.", driveFileObject.Title, (string)config.mimeextensions[exportRequest.MimeType]));
SaveStream(stream, String.Format(@".\output\{0}\{1}.{2}", courseName, driveFileObject.Title, (string)config.mimeextensions[exportRequest.MimeType]));
break;
}
case Google.Apis.Download.DownloadStatus.Failed:
{
Console.WriteLine(String.Format("Download failed on file {0}.\n{2}\n{1}", driveFileObject.Title, exportProgress.Exception.Message, progress.Exception.Message));
break;
}
}
};
exportRequest.DownloadAsync(stream);
}
else
{
Console.WriteLine(String.Format("Download failed on file {0}.\n{1}", driveFileObject.Title, progress.Exception.Message));
}
}
catch (Exception e) {
Console.WriteLine(String.Format("Download failed on file {0}.\n{1}", driveFileObject.Title, e.Message));
}
break;
}
}
};
// Synchronous for now
await fileRequest.DownloadAsync(stream);
}
