public async Task <MetaData> FilesAsync(string path, Stream targetStream, string rev = null,
string asTeamMember = null, CancellationToken cancellationToken = default(CancellationToken))
{
MetaData fileMetadata = null;
string etag = "";
long? length;
using (var restResponse = await _requestExecuter.Execute(() => _requestGenerator.Files(_options.Root, path, rev, asTeamMember), cancellationToken: cancellationToken).ConfigureAwait(false))
{
await _requestExecuter.CheckForError(restResponse, false, cancellationToken).ConfigureAwait(false);
length = restResponse.Content.Headers.ContentLength;
if (length == null)
{
IEnumerable <string> metadatas;
if (restResponse.Headers.TryGetValues("x-dropbox-metadata", out metadatas))
{
string metadata = metadatas.FirstOrDefault();
if (metadata != null)
{
fileMetadata = JsonConvert.DeserializeObject <MetaData>(metadata);
length = fileMetadata.bytes;
}
}
}
IEnumerable <string> etags;
if (restResponse.Headers.TryGetValues("etag", out etags))
{
etag = etags.FirstOrDefault();
}
}
long read = 0;
bool hasMore = true;
do
{
long from = read;
long to = read + _options.ChunkSize;
using (var restResponse2 = await _requestExecuter.Execute(() => _requestGenerator.FilesRange(_options.Root, path, from, to - 1, etag, rev, asTeamMember), cancellationToken: cancellationToken).ConfigureAwait(false))
{
try
{
using (cancellationToken.Register(restResponse2.Dispose))
await restResponse2.Content.CopyToAsync(targetStream).ConfigureAwait(false);
}
catch (HttpRequestException ex)
{
if (ex.InnerException != null && ex.InnerException is ObjectDisposedException)
{
cancellationToken.ThrowIfCancellationRequested();
}
throw;
}
catch (ObjectDisposedException)
{
cancellationToken.ThrowIfCancellationRequested();
}
read += (restResponse2.Content.Headers.ContentLength ?? 0);
if (length.HasValue && read >= length.GetValueOrDefault())
{
hasMore = false;
}
else if (restResponse2.StatusCode == HttpStatusCode.OK)
{
hasMore = false;
}
}
} while (hasMore);
return(fileMetadata);
}
