public async Task OnGetAsync()
{
if (VideoId == null)
{
throw new ArgumentNullException(nameof(VideoId));
}
if (!VideoId.IsAbsolutelySafe())
{
throw new ArgumentException(nameof(VideoId));
}
if (Lang == null)
{
throw new ArgumentNullException(nameof(Lang));
}
if (!Lang.IsAbsolutelySafe())
{
throw new ArgumentException(nameof(Lang));
}
if (!Request.Cookies.TryGetValue($"vtt-{VideoId}-url", out var vttUrl) ||
!Request.Cookies.TryGetValue($"vtt-{VideoId}-langs", out var vttLangs))
{
var(vtts, title) = await Helpers.GetManifestDataAsync(VideoId, HttpContext.RequestAborted);
if (!vtts.TryGetValue(Lang, out vttUrl))
{
throw new ArgumentOutOfRangeException(nameof(Lang));
}
// set list of languages from vtts.Keys
foreach (var item in Languages.Items)
{
if (vtts.ContainsKey(item.Value))
{
Langs.Add(item);
}
}
Title = title;
AdjustVttCookies(vtts, VideoId, Lang, title);
}
else
{
// set list of languages from vttLangs
foreach (var item in Languages.Items)
{
if (vttLangs.Contains(item.Value))
{
Langs.Add(item);
}
}
Title = Request.Cookies[$"vtt-{VideoId}-title"];
}
if (Title == null)
{
Title = $"#{VideoId}";
}
using (var client = new HttpClient())
using (HttpContext.RequestAborted.Register(client.CancelPendingRequests))
using (var stream = await client.GetStreamAsync(vttUrl))
using (var reader = new StreamReader(stream))
{
Lines = new List <string> ();
while (true)
{
var line = await reader.ReadLineAsync();
if (line == null)
{
return;
}
Lines.Add(line);
}
}
}