private void SpliteM3U8(string m3u8Response)
{
var matches = ReGeXHelper.GetResList(m3u8Response, @"#EXTINF:(.*)?,\n(.*?\.ts)");
//获取所有的ts片段信息
matches.ForEach(m =>
{
TsTimes.Add(m?.Groups[1].Value);
TsPaths.Add(m?.Groups[2].Value);
});
}
/// <summary>
/// 判断是否是多码率
/// </summary>
/// <returns></returns>
private bool IsMutiple()
{
//#EXT-X-STREAM-INF.*?\n(.*)
var inf = ReGeXHelper.GetResList(M3U8Response, @"#EXT-X-STREAM-INF.*?\n(.*)");
if (inf.Count != 0)
{
M3U8Url = ApplyURL(inf[0].Groups[1].Value, M3U8Url);
RequestM3U8();
return(true);
}
return(false);
}
/// <summary>
/// 解析m3u8 并保存成自己的
/// </summary>
private void AnalysisM3U8()
{
//判断是否 多码率适配流 并重新请求
IsMutiple();
//如果需要自己重新加密的 那么需要生成对应的key
if (outFileConfig.saveAsEncrpy)
{
GenerateAESKey();
}
Logger.LogDebug("分解出所有的ts文件" + M3U8Response);
//分解出所有的ts文件
SpliteM3U8(M3U8Response);
//检测视频 AES 加密
if (M3U8Response.IndexOf("#EXT-X-KEY") != -1)
{
//.*METHOD=([^,]+) #EXT-X-KEY:METHOD=AES-128,
var method = ReGeXHelper.GetRes(M3U8Response, @".*METHOD=([^,]+)");
aesConf.method = method != null ? method.Groups[1].Value : "";
//.*URI="([^"]+) URI="key.key"
var uri = ReGeXHelper.GetRes(M3U8Response, @".*URI=""([^""]+)");
aesConf.uri = uri != null ? uri.Groups[1].Value : "";
//.*IV=([^,]+)
var iv = ReGeXHelper.GetRes(M3U8Response, @".*IV=([^,]+)");
aesConf.iv = iv != null ? iv.Groups[1].Value : "";
aesConf.uri = ApplyURL(aesConf.uri, M3U8Url);
Logger.LogDebug("解密" + aesConf.uri);
GetAES();
}
else
{
DownloadTS();
}
Logger.LogDebug("保存新的m3u8");
OutSaveEnd();
}
/// <summary>
/// 最后写入属于自己的M3U8
/// </summary>
private void OutSaveEnd()
{
string m3u8 = M3U8Response;
//判断是否请求成功 利用//#EXTM3U 每个 M3U 文件必须将该标签放置在第一行
var m3u8Top = ReGeXHelper.GetRes(m3u8, @"#EXTM3U");
if (m3u8Top == null)
{
Logger.LogError("请求失败（最后写入属于自己的M3U8）：" + M3U8Response);
IsComplete = false;
return;
}
Logger.LogDebug($"m3u8Top::{m3u8Top}");
//版本
var version = ReGeXHelper.GetRes(m3u8, @"#EXT-X-VERSION:(.*)");
outFileConfig.version = version != null ? version.Groups[1].Value : "0";
Logger.LogDebug($"version::{outFileConfig.version}");
if (outFileConfig.Times.Count == 0)
{
Logger.LogDebug("请求完成后，并没有下载到ts文件，自动退出");
IsComplete = false;
return;
}
//#EXT-X-TARGETDURATION 最大时间 int
var targetduration = ReGeXHelper.GetRes(m3u8, @"#EXT-X-TARGETDURATION:(.*)");
outFileConfig.targetduration = targetduration != null ? targetduration.Groups[1].Value : (((int)Math.Ceiling(outFileConfig.Times.Max(m => Convert.ToDouble(m)))).ToString());
Logger.LogDebug($"targetduration::{outFileConfig.targetduration}");
//#EXT-X-MEDIA-SEQUENCE
var sequence = ReGeXHelper.GetRes(m3u8, @"#EXT-X-SEQUENCE:(.*)");
outFileConfig.sequence = sequence != null ? sequence.Groups[1].Value : "0";
Logger.LogDebug($"sequence::{outFileConfig.sequence}");
outFileConfig.Template = outFileConfig.Template.Replace("{VERSION}", outFileConfig.version);
outFileConfig.Template = outFileConfig.Template.Replace("{TARGETDURATION}", outFileConfig.targetduration);
outFileConfig.Template = outFileConfig.Template.Replace("{SEQUENCE}", outFileConfig.sequence);
//是否加密的处理
OutSaveAESEncrypt();
Logger.LogDebug($"开始content");
string allContent = "";
var paths = outFileConfig.PathTime.ToArray();
var times = outFileConfig.Times.ToArray();
Logger.LogDebug($"开始sort::{paths.Length},{times.Length}");
Array.Sort(paths, times);
Logger.LogDebug($"sortj结束::{paths.Length}");
for (int i = 0; i < paths.Length; i++)
{
var time = times[i];
var path = paths[i];
string content = $"#EXTINF:{time},\n" +
$"{path}.ts\n";
allContent += content;
Logger.LogDebug($"content::{content}");
}
//{CONTENT}
outFileConfig.Template = outFileConfig.Template.Replace("{CONTENT}", allContent);
Logger.LogDebug($"Template::{outFileConfig.Template}");
using (FileStream file = new FileStream($"{GetM3U8Path()}", FileMode.Create, FileAccess.ReadWrite))
{
byte[] bytes = Encoding.UTF8.GetBytes(outFileConfig.Template);
file.Write(bytes, 0, bytes.Length);
}
}
