public RResultCode GetResourceById(string id, string name, out AudioResource resource)
{
var channel = id;
// request api token
string jsonResponse;
if (!WebWrapper.DownloadString(out jsonResponse, new Uri($"http://api.twitch.tv/api/channels/{channel}/access_token")))
{
resource = null;
return(RResultCode.NoConnection);
}
var jsonDict = (Dictionary <string, object>)jsonParser.DeserializeObject(jsonResponse);
// request m3u8 file
var token = Uri.EscapeUriString(jsonDict["token"].ToString());
var sig = jsonDict["sig"];
// guaranteed to be random, chosen by fair dice roll.
var random = 4;
string m3u8;
if (!WebWrapper.DownloadString(out m3u8, new Uri($"http://usher.twitch.tv/api/channel/hls/{channel}.m3u8?player=twitchweb&&token={token}&sig={sig}&allow_audio_only=true&allow_source=true&type=any&p={random}")))
{
resource = null;
return(RResultCode.NoConnection);
}
// parse m3u8 file
var dataList = new List <StreamData>();
using (var reader = new System.IO.StringReader(m3u8))
{
var header = reader.ReadLine();
if (string.IsNullOrEmpty(header) || header != "#EXTM3U")
{
resource = null;
return(RResultCode.TwitchMalformedM3u8File);
}
while (true)
{
var blockInfo = reader.ReadLine();
if (string.IsNullOrEmpty(blockInfo))
{
break;
}
var match = m3u8ExtMatch.Match(blockInfo);
if (!match.Success)
{
continue;
}
switch (match.Groups[1].Value)
{
case "EXT-X-TWITCH-INFO": break; // Ignore twitch info line
case "EXT-X-MEDIA":
string streamInfo = reader.ReadLine();
Match infoMatch;
if (string.IsNullOrEmpty(streamInfo) ||
!(infoMatch = m3u8ExtMatch.Match(streamInfo)).Success ||
infoMatch.Groups[1].Value != "EXT-X-STREAM-INF")
{
resource = null;
return(RResultCode.TwitchMalformedM3u8File);
}
var streamData = new StreamData();
// #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=128000,CODECS="mp4a.40.2",VIDEO="audio_only"
for (int i = 0; i < infoMatch.Groups[3].Captures.Count; i++)
{
string key = infoMatch.Groups[4].Captures[i].Value.ToUpper();
string value = infoMatch.Groups[5].Captures[i].Value;
switch (key)
{
case "BANDWIDTH": streamData.Bandwidth = int.Parse(value); break;
case "CODECS": streamData.Codec = TextUtil.StripQuotes(value); break;
case "VIDEO":
StreamQuality quality;
if (Enum.TryParse(TextUtil.StripQuotes(value), out quality))
{
streamData.QualityType = quality;
}
else
{
streamData.QualityType = StreamQuality.unknown;
}
break;
}
}
streamData.Url = reader.ReadLine();
dataList.Add(streamData);
break;
default: break;
}
}
}
resource = new TwitchResource(channel, name ?? $"Twitch channel: {channel}", dataList);
return(dataList.Count > 0 ? RResultCode.Success : RResultCode.TwitchNoStreamsExtracted);
}
public RResultCode GetResourceById(string id, string name, out AudioResource resource)
{
var channel = id;
// request api token
string jsonResponse;
if (!WebWrapper.DownloadString(out jsonResponse, new Uri($"http://api.twitch.tv/api/channels/{channel}/access_token")))
{
resource = null;
return RResultCode.NoConnection;
}
var jsonDict = (Dictionary<string, object>)jsonParser.DeserializeObject(jsonResponse);
// request m3u8 file
var token = Uri.EscapeUriString(jsonDict["token"].ToString());
var sig = jsonDict["sig"];
// guaranteed to be random, chosen by fair dice roll.
var random = 4;
string m3u8;
if (!WebWrapper.DownloadString(out m3u8, new Uri($"http://usher.twitch.tv/api/channel/hls/{channel}.m3u8?player=twitchweb&&token={token}&sig={sig}&allow_audio_only=true&allow_source=true&type=any&p={random}")))
{
resource = null;
return RResultCode.NoConnection;
}
// parse m3u8 file
var dataList = new List<StreamData>();
using (var reader = new System.IO.StringReader(m3u8))
{
var header = reader.ReadLine();
if (string.IsNullOrEmpty(header) || header != "#EXTM3U")
{
resource = null;
return RResultCode.TwitchMalformedM3u8File;
}
while (true)
{
var blockInfo = reader.ReadLine();
if (string.IsNullOrEmpty(blockInfo))
break;
var match = m3u8ExtMatch.Match(blockInfo);
if (!match.Success)
continue;
switch (match.Groups[1].Value)
{
case "EXT-X-TWITCH-INFO": break; // Ignore twitch info line
case "EXT-X-MEDIA":
string streamInfo = reader.ReadLine();
Match infoMatch;
if (string.IsNullOrEmpty(streamInfo) ||
!(infoMatch = m3u8ExtMatch.Match(streamInfo)).Success ||
infoMatch.Groups[1].Value != "EXT-X-STREAM-INF")
{
resource = null;
return RResultCode.TwitchMalformedM3u8File;
}
var streamData = new StreamData();
// #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=128000,CODECS="mp4a.40.2",VIDEO="audio_only"
for (int i = 0; i < infoMatch.Groups[3].Captures.Count; i++)
{
string key = infoMatch.Groups[4].Captures[i].Value.ToUpper();
string value = infoMatch.Groups[5].Captures[i].Value;
switch (key)
{
case "BANDWIDTH": streamData.Bandwidth = int.Parse(value); break;
case "CODECS": streamData.Codec = TextUtil.StripQuotes(value); break;
case "VIDEO":
StreamQuality quality;
if (Enum.TryParse(TextUtil.StripQuotes(value), out quality))
streamData.QualityType = quality;
else
streamData.QualityType = StreamQuality.unknown;
break;
}
}
streamData.Url = reader.ReadLine();
dataList.Add(streamData);
break;
default: break;
}
}
}
resource = new TwitchResource(channel, name ?? $"Twitch channel: {channel}", dataList);
return dataList.Count > 0 ? RResultCode.Success : RResultCode.TwitchNoStreamsExtracted;
}