private static async Task MainAsync(Channel9RssResult rssResult, DirectoryInfo directory, bool mp4, bool mp3, bool useHighestQuality)
{
Console.WriteLine($"{rssResult.SyndicationItems.Count()} items found at {rssResult.SourceUrl.ToString()}");
Console.WriteLine();
if (rssResult.SyndicationItems.Count() < 1)
{
Console.WriteLine("Exiting...");
}
foreach (var session in rssResult.Sessions)
{
if (mp4)
{
var localVideoFile = await session.DownloadMp4SessionAsync(directory, useHighestQuality);
}
if (mp3)
{
var localAudioFile = await session.DownloadMp3SessionAsync(directory, useHighestQuality);
}
Console.WriteLine();
}
}
private static async Task MainAsync(Channel9RssResult rssResult, DirectoryInfo directory, bool mp4, bool mp3, bool useHighestQuality, int batchSize)
{
var groupedSessionList =
rssResult.Sessions.Select((value, index) => new { Index = index, Value = value })
.GroupBy(x => x.Index / batchSize)
.Select(g => g.Select(x => x.Value).ToList())
.ToList();
int total = rssResult.Sessions.Count;
int groupCounter = 1;
int fileCounter = 1;
foreach (var session in groupedSessionList)
{
Console.WriteLine("Getting Group {0} of {1} ({2}-{3} of {4})", groupCounter++, groupedSessionList.Count, fileCounter, ((fileCounter - 1) + batchSize), total);
var taskList = new List <Task>();
foreach (var item in session)
{
if (mp4)
{
taskList.Add(item.DownloadMp4SessionAsync(directory, useHighestQuality));
}
if (mp3)
{
taskList.Add(item.DownloadMp3SessionAsync(directory, useHighestQuality));
}
}
try
{
await Task.WhenAll(taskList.ToArray());
fileCounter += batchSize;
Console.WriteLine();
}
catch (AggregateException ae)
{
Console.WriteLine("##################################################");
Console.WriteLine(ae.Message);
foreach (var ex in ae.InnerExceptions)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("##################################################");
}
}
}
private static void Validate(Channel9RssResult rssResult, DirectoryInfo directory)
{
var localVideos = rssResult.Sessions.GroupBy(v => v.HasLocalFile);
foreach (var videos in localVideos)
{
if (!videos.Key)
{
Console.WriteLine("Sessions Not Available:");
foreach (var file in videos)
{
Console.WriteLine(" " + file.Title);
}
Console.WriteLine();
Console.WriteLine();
}
}
return;
}
public async Task <Channel9RssResult> Parse(Uri rssUri)
{
var result = new Channel9RssResult();
result.SourceUrl = rssUri;
try
{
using (var client = new HttpClient())
{
result.RawXml = await client.GetStringAsync(rssUri);
using (var xmlReader = XmlReader.Create(new StringReader(result.RawXml), new XmlReaderSettings()
{
Async = false
}))
{
var feedReader = new RssFeedReader(xmlReader);
while (await feedReader.Read())
{
switch (feedReader.ElementType)
{
// Read category
case SyndicationElementType.Category:
ISyndicationCategory category = await feedReader.ReadCategory();
break;
// Read Image
case SyndicationElementType.Image:
ISyndicationImage image = await feedReader.ReadImage();
break;
// Read Item
case SyndicationElementType.Item:
// parse the syndication item
ISyndicationItem item = await feedReader.ReadItem();
result.SyndicationItems.Add(item);
// then construct a session info
var si = new SessionInfo();
si.SessionID = item.Id.Substring(item.Id.LastIndexOf("/", StringComparison.InvariantCultureIgnoreCase) + 1);
si.Title = item.Title;
si.SessionSite = new Uri(item.Id);
si.PublishDate = item.Published.DateTime;
si.Presenter = item.Contributors.FirstOrDefault()?.Name;
result.Sessions.Add(si);
foreach (var v in item.Links)
{
if (!string.IsNullOrWhiteSpace(v.MediaType))
{
si.VideoRecordings.Add(new VideoRecording()
{
SessionInfo = si, Url = v.Uri, MediaType = v.MediaType, Length = v.Length
});
}
}
break;
// Read link
case SyndicationElementType.Link:
ISyndicationLink link = await feedReader.ReadLink();
break;
// Read Person
case SyndicationElementType.Person:
ISyndicationPerson person = await feedReader.ReadPerson();
break;
// Read content
default:
ISyndicationContent content = await feedReader.ReadContent();
break;
}
}
}
}
}
catch (Exception ex)
{
result.Exceptions = new List <Exception>();
result.Exceptions.Add(ex);
}
return(result);
}
// sample expected arguments
// download --rss https://s.ch9.ms/Events/Build/2017/RSS -d C:\MyVideos\Build --mp4 --mp3 --hd -n 5
public static int Main(string[] args)
{
var app = new CommandLineApplication();
app.Name = "channel9-dl";
app.Description = "Channel 9 video downloading app powered by .NET core";
app.HelpOption("-?|--help");
var rssOpt = app.Option("-r|--rss", "Required URL to the RSS Feed", CommandOptionType.SingleValue);
rssOpt.IsRequired(false, "You must specify the RSS feed!");
var localDirOpt = app.Option("-d|--directory", "Required full path to the download directory", CommandOptionType.SingleValue);
localDirOpt.IsRequired(false, "You must specify the local directory!");
var mp4Opt = app.Option("--mp4", "If set, downloads session MP4's", CommandOptionType.NoValue);
var mp3Opt = app.Option("--mp3", "If set, downloads sessions MP3's", CommandOptionType.NoValue);
var qualityOpt = app.Option("-h|--hd", "If set, download highest quality available, othersise, download smallest size available.", CommandOptionType.NoValue);
var batchSizeOpt = app.Option("-n|--batch", "If set, specifies the number of groups to download concurrently", CommandOptionType.SingleValue);
app.OnExecute(async() =>
{
var rssUri = new Uri(rssOpt.Value());
var localDir = new DirectoryInfo(localDirOpt.Value());
Console.WriteLine($" RSS = {rssUri.AbsoluteUri}");
Console.WriteLine($"Local Directory = {localDir.FullName}");
Console.WriteLine();
var startTime = DateTime.Now;
try
{
var ch9Parser = new Channel9RssParser();
Channel9RssResult rssResult = await ch9Parser.Parse(rssUri);
if (batchSizeOpt.HasValue())
{
int batchSize = int.Parse(batchSizeOpt.Value());
await MainAsync(rssResult, localDir, mp4Opt.HasValue(), mp3Opt.HasValue(), qualityOpt.HasValue(), batchSize);
}
else
{
await MainAsync(rssResult, localDir, mp4Opt.HasValue(), mp3Opt.HasValue(), qualityOpt.HasValue());
}
Validate(rssResult, localDir);
}
catch (AggregateException agex)
{
Console.WriteLine("########################## Exception(s) ##################################");
foreach (var ex in agex.InnerExceptions)
{
Console.WriteLine(" " + ex.Message);
}
Console.WriteLine("########################## Exception(s) ##################################");
}
var endTime = DateTime.Now;
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Started : " + startTime);
Console.WriteLine("Finished: " + endTime);
Console.WriteLine();
Console.WriteLine("Elapsed : " + ((endTime - startTime).TotalMinutes).ToString("#0.00") + " minutes");
});
int result;
try
{
result = app.Execute(args);
}
catch (Exception ex)
{
Console.WriteLine(ex);
Console.WriteLine();
result = -1;
}
return(result);
}
