private async Task <Channel> RequestChannel(
StreamName stream_name,
CancellationToken cancel_token)
{
Guid channel_id;
if (!Guid.TryParse(stream_name.Name, out channel_id))
{
return(null);
}
var tracker_uri =
stream_name.Parameters.ContainsKey("tip") ?
OutputStreamBase.CreateTrackerUri(channel_id, stream_name.Parameters["tip"]) :
null;
var channel = owner.RequestChannel(channel_id, tracker_uri);
if (channel == null)
{
return(null);
}
await Task.WhenAny(
Task.Delay(10000),
channel.WaitForReadyContentTypeAsync(cancel_token)).ConfigureAwait(false);
if (channel.ChannelInfo == null ||
String.IsNullOrEmpty(channel.ChannelInfo.ContentType) ||
channel.ChannelInfo.ContentType != "FLV")
{
return(null);
}
return(channel);
}
private static async Task<Channel> GetChannelAsync(OwinEnvironment ctx, ParsedRequest req, CancellationToken ct)
{
var tip = ctx.Request.Query.Get("tip");
var channel = ctx.GetPeerCast().RequestChannel(req.ChannelId, OutputStreamBase.CreateTrackerUri(req.ChannelId, tip), true);
if (channel==null) {
return null;
}
using (var cts=CancellationTokenSource.CreateLinkedTokenSource(ct)) {
cts.CancelAfter(10000);
await channel.WaitForReadyContentTypeAsync(cts.Token).ConfigureAwait(false);
}
return channel;
}
private Uri CreateTrackerUri(Guid channel_id, Uri request_uri)
{
string tip = null;
foreach (Match param in Regex.Matches(request_uri.Query, @"(&|\?)([^&=]+)=([^&=]+)"))
{
if (Uri.UnescapeDataString(param.Groups[2].Value) == "tip")
{
tip = Uri.UnescapeDataString(param.Groups[3].Value);
break;
}
}
return(OutputStreamBase.CreateTrackerUri(channel_id, tip));
}