public override async Task ExecuteResultAsync(IWebDavResponse response, CancellationToken ct)
{
await base.ExecuteResultAsync(response, ct).ConfigureAwait(false);
response.Headers["Accept-Ranges"] = new[] { "bytes" };
var properties = await _document.GetProperties(response.Dispatcher).ToList(ct).ConfigureAwait(false);
var etagProperty = properties.OfType <GetETagProperty>().FirstOrDefault();
if (etagProperty != null)
{
var propValue = await etagProperty.GetValueAsync(ct).ConfigureAwait(false);
response.Headers["ETag"] = new[] { propValue.ToString() };
}
if (!_returnFile)
{
var lastModifiedProp = properties.OfType <LastModifiedProperty>().FirstOrDefault();
if (lastModifiedProp != null)
{
var propValue = await lastModifiedProp.GetValueAsync(ct).ConfigureAwait(false);
response.Headers["Last-Modified"] = new[] { propValue.ToString("R") };
}
return;
}
var views = new List <StreamView>();
try
{
foreach (var rangeItem in _rangeItems)
{
var baseStream = await _document.OpenReadAsync(ct).ConfigureAwait(false);
var streamView = await StreamView
.CreateAsync(baseStream, rangeItem.From, rangeItem.Length, ct)
.ConfigureAwait(false);
views.Add(streamView);
}
string contentType;
var contentTypeProp = properties.OfType <GetContentTypeProperty>().FirstOrDefault();
if (contentTypeProp != null)
{
contentType = await contentTypeProp.GetValueAsync(ct).ConfigureAwait(false);
}
else
{
contentType = MimeTypesMap.DefaultMimeType;
}
HttpContent content;
if (_rangeItems.Count == 1)
{
// No multipart content
var rangeItem = _rangeItems.Single();
var streamView = views.Single();
content = new StreamContent(streamView);
try
{
content.Headers.ContentRange = new ContentRangeHeaderValue(rangeItem.From, rangeItem.To, _document.Length);
content.Headers.ContentLength = rangeItem.Length;
}
catch
{
content.Dispose();
throw;
}
content.Headers.ContentType = MediaTypeHeaderValue.Parse(contentType);
}
else
{
// Multipart content
var multipart = new MultipartContent("byteranges");
try
{
var index = 0;
foreach (var rangeItem in _rangeItems)
{
var streamView = views[index++];
var partContent = new StreamContent(streamView);
partContent.Headers.ContentRange = new ContentRangeHeaderValue(rangeItem.From, rangeItem.To, _document.Length);
partContent.Headers.ContentType = MediaTypeHeaderValue.Parse(contentType);
partContent.Headers.ContentLength = rangeItem.Length;
multipart.Add(partContent);
}
}
catch
{
multipart.Dispose();
throw;
}
content = multipart;
}
using (content)
{
await SetPropertiesToContentHeaderAsync(content, properties, ct)
.ConfigureAwait(false);
foreach (var header in content.Headers)
{
response.Headers.Add(header.Key, header.Value.ToArray());
}
await content.CopyToAsync(response.Body).ConfigureAwait(false);
}
}
finally
{
foreach (var streamView in views)
{
streamView.Dispose();
}
}
}
public override async Task ExecuteResultAsync(IWebDavResponse response, CancellationToken ct)
{
await base.ExecuteResultAsync(response, ct);
response.Headers["Accept-Ranges"] = new[] { "bytes" };
var properties = await _document.GetProperties(response.Dispatcher).ToList(ct);
var etagProperty = properties.OfType <GetETagProperty>().FirstOrDefault();
if (etagProperty != null)
{
var propValue = await etagProperty.GetValueAsync(ct);
response.Headers["ETag"] = new[] { propValue.ToString() };
}
if (!_returnFile)
{
var lastModifiedProp = properties.OfType <LastModifiedProperty>().FirstOrDefault();
if (lastModifiedProp != null)
{
var propValue = await lastModifiedProp.GetValueAsync(ct);
response.Headers["Last-Modified"] = new[] { propValue.ToString("R") };
}
return;
}
var views = new List <StreamView>();
try
{
foreach (var rangeItem in _rangeItems)
{
var baseStream = await _document.OpenReadAsync(ct);
var streamView = await StreamView
.CreateAsync(baseStream, rangeItem.From, rangeItem.Length, ct)
;
views.Add(streamView);
}
string contentType;
var contentTypeProp = properties.OfType <GetContentTypeProperty>().FirstOrDefault();
if (contentTypeProp != null)
{
contentType = await contentTypeProp.GetValueAsync(ct);
}
else
{
contentType = MimeTypesMap.DefaultMimeType;
}
if (_rangeItems.Count == 1)
{
// No multipart content
var rangeItem = _rangeItems.Single();
var streamView = views.Single();
using (var streamContent = new StreamContent(streamView))
{
streamContent.Headers.ContentRange = new ContentRangeHeaderValue(
rangeItem.From,
rangeItem.To,
_document.Length);
streamContent.Headers.ContentLength = rangeItem.Length;
streamContent.Headers.ContentType = MediaTypeHeaderValue.Parse(contentType);
await SetPropertiesToContentHeaderAsync(streamContent, properties, ct)
;
foreach (var header in streamContent.Headers)
{
response.Headers.Add(header.Key, header.Value.ToArray());
}
// Use the CopyToAsync function of the stream itself, because
// we're able to pass the cancellation token. This is a workaround
// for issue dotnet/corefx#9071 and fixes FubarDevelopment/WebDavServer#47.
await streamView.CopyToAsync(response.Body, 81920, ct)
;
}
}
else
{
// Multipart content
using (var multipart = new MultipartContent("byteranges"))
{
var index = 0;
foreach (var rangeItem in _rangeItems)
{
var streamView = views[index++];
var partContent = new StreamContent(streamView);
partContent.Headers.ContentRange = new ContentRangeHeaderValue(
rangeItem.From,
rangeItem.To,
_document.Length);
partContent.Headers.ContentType = MediaTypeHeaderValue.Parse(contentType);
partContent.Headers.ContentLength = rangeItem.Length;
multipart.Add(partContent);
}
await SetPropertiesToContentHeaderAsync(multipart, properties, ct)
;
foreach (var header in multipart.Headers)
{
response.Headers.Add(header.Key, header.Value.ToArray());
}
// TODO: Workaround for issue dotnet/corefx#9071
await multipart.CopyToAsync(response.Body);
}
}
}
finally
{
foreach (var streamView in views)
{
streamView.Dispose();
}
}
}
