/// <summary>
/// Upload a file
/// </summary>
/// <param name="folderId">The target <see cref="File"/> (folder) ID to upload to</param>
/// <param name="name">The new file name</param>
/// <param name="input">The data to upload</param>
/// <param name="mimeType">The mime type of the file to upload</param>
/// <param name="cancellationToken"></param>
/// <returns>The <see cref="Task"/></returns>
public async Task UploadAsync([NotNull] string folderId, [NotNull] string name, [NotNull] Stream input, [NotNull] string mimeType, CancellationToken cancellationToken)
{
using (var uploadClient = CreateClient())
{
var length = input.Length;
var newItem = new File()
{
Title = name,
MimeType = mimeType,
Parents = new List<ParentReference>
{
new ParentReference()
{
Id = folderId
}
},
};
var requestStartResumableSession = CreateRequest($"/{DriveUploadApiPath}files", Method.POST);
requestStartResumableSession.AddQueryParameter("uploadType", "resumable");
requestStartResumableSession.AddHeader("X-Upload-Content-Type", mimeType);
requestStartResumableSession.AddHeader("X-Upload-Content-Length", length);
requestStartResumableSession.AddBody(newItem);
var responseStartResumableSession = await uploadClient.Execute(requestStartResumableSession, cancellationToken);
var sessionUri = responseStartResumableSession.ResponseUri.OriginalString;
uploadClient.IgnoreResponseStatusCode = true;
int blockSize = 262144; // Info from Google PUT error message
var buffer = new byte[blockSize];
byte[] temp = null;
int size;
for (long i = 0; i != length; i += size)
{
size = (int)Math.Min(length, blockSize);
var readSize = input.Read(buffer, 0, size);
if (readSize == 0)
throw new InvalidOperationException($"Failed to read {size} bytes from position {i}");
size = readSize;
var requestRange = new HttpRange("bytes", new HttpRangeItem(i, i + size - 1));
if (temp == null || temp.Length != size)
temp = new byte[size];
Array.Copy(buffer, temp, size);
var requestUploadChunk = CreateRequest(sessionUri, Method.PUT);
requestUploadChunk.AddHeader("Content-Range", requestRange.ToString(requestRange.RangeItems.Single(), length));
requestUploadChunk.AddParameter(string.Empty, temp, ParameterType.RequestBody, mimeType);
var responseUploadChunk = await uploadClient.Execute(requestUploadChunk, cancellationToken);
if (!responseUploadChunk.IsSuccess && responseUploadChunk.StatusCode != (HttpStatusCode)308)
throw new WebException(responseUploadChunk.StatusDescription, WebExceptionStatus.UnknownError);
}
}
}
/// <summary>
/// Get a <see cref="HttpWebResponse"/> to download a <see cref="File"/>
/// </summary>
/// <param name="file">The <see cref="File"/> to download</param>
/// <param name="from">The offset where the download starts from</param>
/// <param name="cancellationToken"></param>
/// <returns>The <see cref="HttpWebResponse"/> used to download the file</returns>
public async Task<HttpWebResponse> GetDownloadResponseAsync(File file, long? from, CancellationToken cancellationToken)
{
var downloadUrl = GetDownloadUrl(file);
var request = await _restClientFactory.CreateWebRequest(new Uri(downloadUrl));
if (from != null)
{
if (_addRangeMethod != null)
{
_addRangeMethod.Invoke(request, new object[] { from.Value });
}
else
{
var range = new HttpRange("bytes", new HttpRangeItem(from, null));
request.Headers[HttpRequestHeader.Range] = range.ToString();
}
}
var response = (HttpWebResponse)await Task.Factory.FromAsync<WebResponse>(request.BeginGetResponse, request.EndGetResponse, null);
return response;
}
