/// <summary>
/// Retrieve first feed from a URI asynchronously
/// </summary>
/// <param name="uri">URI</param>
/// <returns>MediaInfo object that contains the informations of the first feed</returns>
public Task<MediaInfo> RetrieveFirstFeedAsync(string uri)
{
return Task.Run(() =>
{
SyndicationFeed feed;
using (var xmlReader = XmlReader.Create(uri))
{
feed = SyndicationFeed.Load(xmlReader);
}
var item = feed.Items.FirstOrDefault();
if (item == null)
{
return null;
}
var mediaInfo = new MediaInfo()
{
Author = item.Authors == null || !item.Authors.Any() ? null : item.Authors.First().Name,
Title = item.Title.Text,
};
if (item.Links != null)
{
var link = item.Links.FirstOrDefault(l => l.RelationshipType == "enclosure");
if (link != null)
{
mediaInfo.Uri = link.Uri.AbsoluteUri;
mediaInfo.Type = link.MediaType;
}
}
return mediaInfo;
});
}
/// <summary>
/// Retrieve first feed from a URI asynchronously
/// </summary>
/// <param name="uri">URI</param>
/// <returns>MediaInfo object that contains the informations of the first feed</returns>
public async Task<MediaInfo> RetrieveFirstFeedAsync(string uri)
{
var syndicationFeed = await new Windows.Web.Syndication.SyndicationClient().RetrieveFeedAsync(new Uri(uri));
var item = syndicationFeed.Items.FirstOrDefault();
if (item == null)
{
return null;
}
var mediaInfo = new MediaInfo()
{
Author = item.Authors == null || !item.Authors.Any() ? null : item.Authors.First().Name,
Title = item.Title.Text,
Uri = item.ItemUri == null ? null : item.ItemUri.AbsoluteUri
};
if (item.Links != null)
{
var link = item.Links.FirstOrDefault(l => l.Relationship == "enclosure");
if (link != null)
{
mediaInfo.Uri = link.Uri.AbsoluteUri;
mediaInfo.Type = link.MediaType;
}
}
return mediaInfo;
}
private async Task SetMimeType(HttpClient httpClient, MediaInfo mediaInfo)
{
if (!String.IsNullOrWhiteSpace(mediaInfo.Title) && !String.IsNullOrWhiteSpace(mediaInfo.Type))
{
return;
}
var mediaUri = new Uri(WebUtility.UrlDecode(mediaInfo.Uri).Trim());
String mediaFilename;
try { mediaFilename = UriUtility.GetFileName(mediaUri.AbsolutePath); }
catch (Exception) { mediaFilename = null; }
if (String.IsNullOrWhiteSpace(mediaInfo.Title))
{
mediaInfo.Title = mediaFilename;
}
if (String.IsNullOrWhiteSpace(mediaInfo.Type))
{
if (!String.IsNullOrWhiteSpace(mediaFilename))
{
var extension = UriUtility.GetExtension(mediaFilename);
if (!String.IsNullOrWhiteSpace(extension))
{
extension = extension.Substring(1).ToLower();
var mimeType = MimeTypes.FirstOrDefault(mt => mt.Extensions.Any(ext => extension == ext));
if (mimeType != null)
{
mediaInfo.Type = mimeType.Type;
return;
}
}
}
var httpRequest = new HttpRequestMessage() { RequestUri = mediaUri, Method = HttpMethod.Head };
try
{
var contentType = (await httpClient.GetAsync(mediaUri).TimeoutAfter(5000)).Content.Headers.ContentType;
if (contentType != null)
{
mediaInfo.Type = contentType.MediaType;
return;
}
}
catch (Exception) { }
mediaInfo.Type = "video/mp4";
}
}
/// <summary>
/// Play a media HTTP link to a media renderer
/// </summary>
/// <param name="mediaRenderer">media renderer</param>
/// <param name="mediaInfo">informations about the media</param>
/// <returns>Task</returns>
public async Task Play(Device mediaRenderer, MediaInfo mediaInfo)
{
using (var httpClient = new HttpClient())
{
httpClient.DefaultRequestHeaders.ExpectContinue = false;
mediaInfo = await CheckUri(httpClient, mediaInfo);
var requestUri = new Uri(mediaRenderer.Services.First(service => service.ServiceType == "urn:schemas-upnp-org:service:AVTransport:1").ControlURL, UriKind.RelativeOrAbsolute);
if (!requestUri.IsAbsoluteUri || requestUri.IsFile) // In Mono.Android, requestUri will not a relative uri but a file
{
requestUri = new Uri(new Uri(mediaRenderer.URLBase), requestUri);
}
var xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
"<s:Envelope s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
"<s:Body>" +
"{0}" +
"</s:Body>" +
"</s:Envelope>";
var xmlContent = String.Format(xml, String.Format(
"<u:SetAVTransportURI xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">" +
"<InstanceID>0</InstanceID>" +
"<CurrentURI>{0}</CurrentURI>" +
"<CurrentURIMetaData>{1}</CurrentURIMetaData>" +
"</u:SetAVTransportURI>", mediaInfo.Uri,
String.Format(WebUtility.HtmlEncode(
"<DIDL-Lite xmlns=\"urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/\" xmlns:upnp=\"urn:schemas-upnp-org:metadata-1-0/upnp/\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:sec=\"http://www.sec.co.kr/\">" +
"<item id=\"f-0\" parentID=\"0\" restricted=\"1\">" +
(mediaInfo.Title == null ? String.Empty : "<dc:title>{3}</dc:title>") +
(mediaInfo.Author == null ? String.Empty : "<dc:creator>{4}</dc:creator>") +
"<upnp:class>object.item.{2}</upnp:class>" +
"<res protocolInfo=\"http-get:*:{1}:DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01700000000000000000000000000000\">{0}</res>" +
"</item>" +
"</DIDL-Lite>"), mediaInfo.Uri, mediaInfo.Type, GetMimeTypeUPnPClass(mediaInfo.Type), mediaInfo.Title, mediaInfo.Author)));
var request = CreateContent("SetAVTransportURI", xmlContent);
request.Headers.Add("transferMode.dlna.org", "Streaming");
request.Headers.Add("contentFeatures.dlna.org", "DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01700000000000000000000000000000");
var response = await httpClient.PostAsync(requestUri, request);
if (response.IsSuccessStatusCode)
{
xmlContent = String.Format(xml,
"<u:Play xmlns:u=\"urn:schemas-upnp-org:service:AVTransport:1\">" +
"<InstanceID>0</InstanceID>" +
"<Speed>1</Speed>" +
"</u:Play>");
response = await httpClient.PostAsync(requestUri, CreateContent("Play", xmlContent));
}
else
{
throw new Exception(response.ReasonPhrase);
}
}
}
private async Task<MediaInfo> CheckUri(HttpClient httpClient, MediaInfo mediaInfo)
{
var premiumLinkGenerators = PremiumLinkGenerators;
if (premiumLinkGenerators != null)
{
string url = null;
foreach (var premiumLinkGenerator in premiumLinkGenerators)
{
if (premiumLinkGenerator.Enabled)
{
try
{
var premiumLink = await premiumLinkGenerator.Unrestrict(url ?? (url = WebUtility.UrlDecode(mediaInfo.Uri).Trim()));
if (premiumLink != null)
{
if (String.IsNullOrWhiteSpace(mediaInfo.Title))
{
mediaInfo.Title = premiumLink.Title;
}
mediaInfo.Uri = premiumLink.MainLink;
break;
}
}
catch (NotSupportedException) { }
}
}
}
await SetMimeType(httpClient, mediaInfo);
var syndicationClient = SyndicationClient;
if (syndicationClient != null)
{
var mediaType = mediaInfo.Type;
if (mediaType == "application/rss+xml" || mediaType == "application/xml" || mediaType == "text/xml" || mediaType == "application/rdf+xml" ||
mediaType == "application/atom+xml" || mediaType == "application/xml")
{
// Podcast
var item = await syndicationClient.RetrieveFirstFeedAsync(mediaInfo.Uri);
if (item != null)
{
mediaInfo = item;
await SetMimeType(httpClient, mediaInfo);
}
}
}
mediaInfo.XmlEscape();
return mediaInfo;
}