public async Task SearchListAsync()
{
DownloaderQueue queue = new DownloaderQueue(_token);
try
{
string[] proxies = new string[] { null }; // File.ReadAllLines("goodproxies.txt");
Random rand = new Random(DateTime.UtcNow.Millisecond);
string baseUrl = @"https://www.youtube.com";
string requestUrl = string.Format("{0}/results?search_query={1}", baseUrl, WebUtility.UrlEncode(_term));
while (!_token.IsCancellationRequested && !string.IsNullOrEmpty(requestUrl))
{
int maxRetries = 5;
int retry = 0;
string response = null;
await Task.Delay(TimeSpan.FromMilliseconds(rand.Next(0, 1000)));
while (retry < maxRetries)
{
WebProxy proxy = null;
string address = proxies[rand.Next(0, proxies.Length)];
if (!address.IsNullOrEmpty())
{
proxy = new WebProxy(String.Format("http://{0}", address))
{
UseDefaultCredentials = true
}
}
;
response = await queue.Enqueu(Downloader.DownloadTextAsync(requestUrl, proxy: proxy,
note: "Requesting webpage from YouTube..."));
//await
// Downloader.DownloadTextAsync(requestUrl, proxy: proxy,
// note: "Requesting webpage from YouTube...");
if (response.IsNullOrEmpty())
{
retry++;
}
else
{
break;
}
}
if (response.IsNullOrEmpty())
{
break;
}
VideosPageInfo videosPageInfo = YouTubeParser.ParseVideosPage(response);
if (videosPageInfo.Links.Count == 0)
{
break;
}
await videosPageInfo.Links.Select(link => String.Format("{0}{1}", baseUrl, link))
.Select(link => SearchVideoAsync(link, _term, rand, proxies, queue))
.WhenAll();
if (videosPageInfo.NextPage.IsNullOrEmpty())
{
break;
}
requestUrl = string.Format("{0}{1}", baseUrl, videosPageInfo.NextPage);
}
}
catch (Exception e)
{
}
finally
{
if (!_tokenSource.IsCancellationRequested)
{
_tokenSource.Cancel();
}
}
}
async Task SearchVideoAsync(string videoLink, string query, Random rand, string[] proxies, DownloaderQueue queue)
{
if (_token.IsCancellationRequested)
{
return;
}
int maxRetries = 5;
int retry = 0;
string response = null;
await Task.Delay(TimeSpan.FromMilliseconds(rand.Next(100, 300)));
while (retry < maxRetries)
{
WebProxy proxy = null;
string address = proxies[rand.Next(0, proxies.Length)];
if (!address.IsNullOrEmpty())
{
proxy = new WebProxy(String.Format("http://{0}", address))
{
UseDefaultCredentials = true
}
}
;
response = await queue.Enqueu(Downloader.DownloadTextAsync(videoLink, proxy: proxy, note: String.Format("Requesting {0} from YouTube...", videoLink)));
if (response.IsNullOrEmpty())
{
retry++;
}
else
{
break;
}
}
if (response.IsNullOrEmpty())
{
return;
}
string description = YouTubeParser.ParseVideoPage(response);
_observer.OnNext(new VideoDto()
{
Description = description, Term = query, SourceURL = videoLink
});
}
}