/// <summary>
/// Sends the given file using the SendFile extension.
/// </summary>
/// <param name="response"></param>
/// <param name="file">The file.</param>
/// <param name="offset">The offset in the file.</param>
/// <param name="count">The number of bytes to send, or null to send the remainder of the file.</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public static async Task SendFileAsync(this HttpResponse response, IFileInfo file, long offset, long?count,
CancellationToken cancellationToken = default(CancellationToken))
{
if (response == null)
{
throw new ArgumentNullException(nameof(response));
}
if (file == null)
{
throw new ArgumentNullException(nameof(file));
}
CheckRange(offset, count, file.Length);
if (string.IsNullOrEmpty(file.PhysicalPath))
{
using (var fileContent = file.CreateReadStream())
{
if (offset > 0)
{
fileContent.Seek(offset, SeekOrigin.Begin);
}
await StreamCopyOperation.CopyToAsync(fileContent, response.Body, count, cancellationToken);
}
}
else
{
await response.SendFileAsync(file.PhysicalPath, offset, count, cancellationToken);
}
}
private static async Task SendFileAsyncCore(HttpResponse response, IFileInfo file, long offset, long?count, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(file.PhysicalPath))
{
CheckRange(offset, count, file.Length);
using var fileContent = file.CreateReadStream();
var useRequestAborted = !cancellationToken.CanBeCanceled;
var localCancel = useRequestAborted ? response.HttpContext.RequestAborted : cancellationToken;
try
{
localCancel.ThrowIfCancellationRequested();
if (offset > 0)
{
fileContent.Seek(offset, SeekOrigin.Begin);
}
await StreamCopyOperation.CopyToAsync(fileContent, response.Body, count, StreamCopyBufferSize, localCancel);
}
catch (OperationCanceledException) when(useRequestAborted)
{
}
}
else
{
await response.SendFileAsync(file.PhysicalPath, offset, count, cancellationToken);
}
}
/// <summary>
/// Sends the given file using the SendFile extension.
/// </summary>
/// <param name="response"></param>
/// <param name="file">The file.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
public static Task SendFileAsync(this HttpResponse response, IFileInfo file,
CancellationToken cancellationToken = default(CancellationToken))
{
if (response == null)
{
throw new ArgumentNullException(nameof(response));
}
if (file == null)
{
throw new ArgumentNullException(nameof(file));
}
return(response.SendFileAsync(file, 0, null, cancellationToken));
}
private static async Task SendFileAsyncCore(HttpResponse response, IFileInfo file, long offset, long?count, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(file.PhysicalPath))
{
CheckRange(offset, count, file.Length);
using (var fileContent = file.CreateReadStream())
{
if (offset > 0)
{
fileContent.Seek(offset, SeekOrigin.Begin);
}
await StreamCopyOperation.CopyToAsync(fileContent, response.Body, count, cancellationToken);
}
}
else
{
await response.SendFileAsync(file.PhysicalPath, offset, count, cancellationToken);
}
}