private Task <object> GetFileContentAsync(IHttpRequest request)
{
var startTime = DateTime.Now;
var method = $"{request.Method}::{request.Path}";
Exception exception = null;
try
{
string blobId = request.Parameters.id;
if (!string.IsNullOrEmpty(blobId))
{
var blobData = _blobStorage.GetBlobData(blobId);
if (blobData != null)
{
var fileResponse = new StreamHttpResponse(blobData.Data, blobData.Info.Type)
{
FileName = blobData.Info.Name,
LastWriteTimeUtc = blobData.Info.Time
};
fileResponse.SetContentDispositionAttachment(request.Headers.UserAgent);
return(Task.FromResult <object>(fileResponse));
}
}
return(Task.FromResult <object>(HttpResponse.NotFound));
}
catch (Exception e)
{
exception = e;
_log.Error(Resources.RequestProcessedWithException, new Dictionary <string, object> {
{ "method", method }
}, e);
throw;
}
finally
{
_performanceLog.Log(method, startTime, exception);
}
}
private Task <object> DownloadFile(IHttpRequest request)
{
string formString = request.Query.Form;
dynamic form = null;
if (!string.IsNullOrWhiteSpace(formString))
{
formString = Uri.UnescapeDataString(formString);
form = JsonObjectSerializer.Default.Deserialize(formString);
}
if (form != null)
{
string contentId = form.ContentId;
if (!string.IsNullOrEmpty(contentId))
{
var blobData = _blobStorage.GetBlobData(contentId);
if (blobData != null)
{
var fileResponse = new StreamHttpResponse(blobData.Data, blobData.Info.Type)
{
FileName = blobData.Info.Name,
LastWriteTimeUtc = blobData.Info.Time
};
fileResponse.SetContentDispositionAttachment(request.Headers.UserAgent);
return(Task.FromResult <object>(fileResponse));
}
}
}
return(Task.FromResult <object>(HttpResponse.NotFound));
}
private void SetNancyStreamHttpResponse(NancyContext nancyContext, Response nancyResponse, StreamHttpResponse streamHttpResponse)
{
var lastWriteTimeUtc = streamHttpResponse.LastWriteTimeUtc;
if (lastWriteTimeUtc != null)
{
var eTag = "\"" + lastWriteTimeUtc.Value.Ticks.ToString("x") + "\"";
// Если файл не изменился, возвращается статус NotModified (304)
if (CacheHelpers.ReturnNotModified(eTag, streamHttpResponse.LastWriteTimeUtc, nancyContext))
{
nancyResponse.StatusCode = HttpStatusCode.NotModified;
nancyResponse.Contents = Response.NoBody;
nancyResponse.ContentType = null;
return;
}
nancyResponse.Headers["ETag"] = eTag;
nancyResponse.Headers["Last-Modified"] = lastWriteTimeUtc.Value.ToString("R");
}
var fileName = streamHttpResponse.FileName;
// Если тип содержимого файла не задан, он определяется автоматически
if (!string.IsNullOrEmpty(fileName) &&
(string.IsNullOrEmpty(streamHttpResponse.ContentType) ||
string.Equals(streamHttpResponse.ContentType, HttpConstants.StreamContentType, StringComparison.OrdinalIgnoreCase)))
{
nancyResponse.ContentType = _mimeTypeResolver.GetMimeType(fileName);
}
var contentLength = streamHttpResponse.ContentLength;
// Установка информация о размере файла
if (contentLength != null)
{
nancyResponse.Headers["Content-Length"] = contentLength.ToString();
}
}