private async Task FragmentHandler(IOwinContext ctx, ParsedRequest req, Channel channel)
{
var ct = ctx.Request.CallCancelled;
using (var subscription = HLSChannelSink.GetSubscription(this, channel, ctx, req.Session)) {
subscription.Stopped.ThrowIfCancellationRequested();
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(ct, subscription.Stopped)) {
cts.CancelAfter(10000);
var segments = await subscription.Segmenter.GetSegmentsAsync(cts.Token).ConfigureAwait(false);
var segment = segments.FirstOrDefault(s => s.Index == req.FragmentNumber);
if (segment.Index == 0)
{
ctx.Response.StatusCode = (int)HttpStatusCode.NotFound;
}
else
{
ctx.Response.StatusCode = (int)HttpStatusCode.OK;
ctx.Response.Headers.Add("Access-Control-Allow-Origin", new string[] { "*" });
ctx.Response.ContentType = "video/MP2T";
ctx.Response.ContentLength = segment.Data.LongLength;
await ctx.Response.WriteAsync(segment.Data, cts.Token).ConfigureAwait(false);
}
}
}
}
private async Task PlayListHandler(IOwinContext ctx, ParsedRequest req, Channel channel)
{
var ct = ctx.Request.CallCancelled;
var session = req.Session;
if (String.IsNullOrWhiteSpace(session))
{
var source = new IPEndPoint(IPAddress.Parse(ctx.Request.RemoteIpAddress), ctx.Request.RemotePort ?? 0).ToString();
using (var md5 = System.Security.Cryptography.MD5.Create()) {
session =
md5
.ComputeHash(System.Text.Encoding.ASCII.GetBytes(source))
.Aggregate(new System.Text.StringBuilder(), (builder, v) => builder.Append(v.ToString("X2")))
.ToString();
}
var location = new UriBuilder(ctx.Request.Uri);
if (String.IsNullOrEmpty(location.Query))
{
location.Query = $"session={session}";
}
else
{
location.Query = location.Query.Substring(1) + $"&session={session}";
}
ctx.Response.Redirect(location.Uri.ToString());
return;
}
var pls = new M3U8PlayList(ctx.Request.Query.Get("scheme"), channel);
ctx.Response.StatusCode = (int)HttpStatusCode.OK;
ctx.Response.Headers.Add("Cache-Control", new string [] { "private" });
ctx.Response.Headers.Add("Cache-Disposition", new string [] { "inline" });
ctx.Response.Headers.Add("Access-Control-Allow-Origin", new string[] { "*" });
ctx.Response.ContentType = pls.MIMEType;
using (var subscription = HLSChannelSink.GetSubscription(this, channel, ctx, session)) {
subscription.Stopped.ThrowIfCancellationRequested();
byte[] body;
try {
var baseuri = new Uri(
new Uri(ctx.Request.Uri.GetComponents(UriComponents.SchemeAndServer | UriComponents.UserInfo, UriFormat.UriEscaped)),
"hls/");
var acinfo = ctx.GetAccessControlInfo();
using (var cts = CancellationTokenSource.CreateLinkedTokenSource(ct, subscription.Stopped)) {
cts.CancelAfter(10000);
if (acinfo.AuthorizationRequired)
{
var parameters = new Dictionary <string, string>()
{
{ "auth", acinfo.AuthenticationKey.GetToken() },
{ "session", subscription.SessionId },
};
body = await pls.CreatePlayListAsync(baseuri, parameters, subscription.Segmenter, cts.Token).ConfigureAwait(false);
}
else
{
var parameters = new Dictionary <string, string>()
{
{ "session", subscription.SessionId },
};
body = await pls.CreatePlayListAsync(baseuri, parameters, subscription.Segmenter, cts.Token).ConfigureAwait(false);
}
}
}
catch (OperationCanceledException) {
ctx.Response.StatusCode = (int)HttpStatusCode.GatewayTimeout;
return;
}
ctx.Response.StatusCode = (int)HttpStatusCode.OK;
await ctx.Response.WriteAsync(body, ct).ConfigureAwait(false);
}
}
