/// <summary>
/// Returns a DLNA media item based on the given client and request
/// </summary>
/// <returns>Returns the requested DLNA media item otherwise null</returns>
internal static StreamItem GetNewStreamItem(EndPointSettings client, Uri uri)
{
if (STREAM_ITEMS.TryGetValue(client.ClientId, out var currentStreamItem))
{
return(currentStreamItem);
}
currentStreamItem = new StreamItem(uri.Host);
Guid mediaItemGuid = Guid.Empty;
DlnaMediaItem dlnaItem = null;
int channel = 0;
if (DlnaResourceAccessUtils.ParseMediaItem(uri, out mediaItemGuid))
{
if (mediaItemGuid == Guid.Empty)
{
throw new InvalidOperationException(string.Format("Illegal request syntax. Correct syntax is '{0}'", DlnaResourceAccessUtils.SYNTAX));
}
if (!client.DlnaMediaItems.TryGetValue(mediaItemGuid, out dlnaItem))
{
// Attempt to grab the media item from the database.
MediaItem item = MediaLibraryHelper.GetMediaItem(mediaItemGuid);
if (item == null)
{
throw new Exception(string.Format("Media item '{0}' not found.", mediaItemGuid));
}
dlnaItem = client.GetDlnaItem(item);
}
if (dlnaItem == null)
{
throw new Exception(string.Format("DLNA media item '{0}' not found.", mediaItemGuid));
}
}
else if (DlnaResourceAccessUtils.ParseTVChannel(uri, out channel))
{
dlnaItem = client.GetLiveDlnaItem(channel);
if (dlnaItem == null)
{
throw new Exception(string.Format("DLNA TV channel '{0}' was never tuned.", channel));
}
}
else if (DlnaResourceAccessUtils.ParseRadioChannel(uri, out channel))
{
dlnaItem = client.GetLiveDlnaItem(channel);
if (dlnaItem == null)
{
throw new Exception(string.Format("DLNA radio channel '{0}' was never tuned.", channel));
}
}
currentStreamItem.RequestedMediaItem = mediaItemGuid;
currentStreamItem.TranscoderObject = dlnaItem;
currentStreamItem.Title = dlnaItem?.MediaItemTitle;
currentStreamItem.LiveChannelId = channel > 0 ? channel : 0;
return(currentStreamItem);
}
public override bool Process(IHttpRequest request, IHttpResponse response, IHttpSession session)
{
var uri = request.Uri;
// Check the request path to see if it's for us.
if (!uri.AbsolutePath.StartsWith(DlnaResourceAccessUtils.RESOURCE_ACCESS_PATH))
{
return(false);
}
// Grab the media item given in the request.
Guid mediaItemGuid;
if (!DlnaResourceAccessUtils.ParseMediaItem(uri, out mediaItemGuid))
{
throw new BadRequestException(string.Format("Illegal request syntax. Correct syntax is '{0}'", DlnaResourceAccessUtils.SYNTAX));
}
try
{
// Attempt to grab the media item from the database.
var item = MediaLibraryHelper.GetMediaItem(mediaItemGuid);
if (item == null)
{
throw new BadRequestException(string.Format("Media item '{0}' not found.", mediaItemGuid));
}
// Grab the mimetype from the media item and set the Content Type header.
var mimeType = MediaLibraryHelper.GetOrGuessMimeType(item);
if (mimeType == null)
{
throw new InternalServerException("Media item has bad mime type, re-import media item");
}
response.ContentType = mimeType;
// Grab the resource path for the media item.
var resourcePathStr =
item.Aspects[ProviderResourceAspect.ASPECT_ID].GetAttributeValue(
ProviderResourceAspect.ATTR_RESOURCE_ACCESSOR_PATH);
var resourcePath = ResourcePath.Deserialize(resourcePathStr.ToString());
var ra = GetResourceAccessor(resourcePath);
using (var resourceStream = ra.OpenRead())
{
// HTTP/1.1 RFC2616 section 14.25 'If-Modified-Since'
if (!string.IsNullOrEmpty(request.Headers["If-Modified-Since"]))
{
DateTime lastRequest = DateTime.Parse(request.Headers["If-Modified-Since"]);
if (lastRequest.CompareTo(ra.LastChanged) <= 0)
{
response.Status = HttpStatusCode.NotModified;
}
}
// HTTP/1.1 RFC2616 section 14.29 'Last-Modified'
response.AddHeader("Last-Modified", ra.LastChanged.ToUniversalTime().ToString("r"));
// DLNA Requirement: [7.4.26.1-6]
// Since the DLNA spec allows contentFeatures.dlna.org with any request, we'll put it in.
if (!string.IsNullOrEmpty(request.Headers["getcontentFeatures.dlna.org"]))
{
if (request.Headers["getcontentFeatures.dlna.org"] != "1")
{
// DLNA Requirement [7.4.26.5]
throw new BadRequestException("Illegal value for getcontentFeatures.dlna.org");
}
}
var dlnaString = DlnaProtocolInfoFactory.GetProfileInfo(item).ToString();
response.AddHeader("contentFeatures.dlna.org", dlnaString);
// DLNA Requirement: [7.4.55-57]
// TODO: Bad implementation of requirement
if (!string.IsNullOrEmpty(request.Headers["transferMode.dlna.org"]))
{
if (request.Headers["transferMode.dlna.org"] == "Streaming")
{
response.AddHeader("transferMode.dlna.org", "Streaming");
}
if (request.Headers["transferMode.dlna.org"] == "Interactive")
{
response.AddHeader("transferMode.dlna.org", "Interactive");
}
if (request.Headers["transferMode.dlna.org"] == "Background")
{
response.AddHeader("transferMode.dlna.org", "Background");
}
}
string byteRangesSpecifier = request.Headers["Range"];
IList <Range> ranges = ParseRanges(byteRangesSpecifier, resourceStream.Length);
bool onlyHeaders = request.Method == Method.Header || response.Status == HttpStatusCode.NotModified;
if (ranges != null && ranges.Count == 1)
{
// We only support one range
SendRange(response, resourceStream, ranges[0], onlyHeaders);
}
else
{
SendWholeFile(response, resourceStream, onlyHeaders);
}
}
}
catch (FileNotFoundException ex)
{
throw new InternalServerException(string.Format("Failed to proccess media item '{0}'", mediaItemGuid), ex);
}
return(true);
}
