protected override async Task <string> GetRedirect(string url, CookieAwareWebClient client, CancellationToken cancellation)
{
using (client.SetUserAgent("Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")) {
return(Encoding.UTF8.GetString(Convert.FromBase64String(Reverse(
Regex.Match(await client.DownloadStringTaskAsync(url), @"ysmm\s=\s'(.*?)'").Groups[1].Value))).Remove(0, 2));
}
}
protected override async Task <string> DownloadAsyncInner(CookieAwareWebClient client,
FlexibleLoaderGetPreferredDestinationCallback getPreferredDestination,
FlexibleLoaderReportDestinationCallback reportDestination, Func <bool> checkIfPaused,
IProgress <long> progress, CancellationToken cancellation)
{
using (client.SetUserAgent(CmApiProvider.CommonUserAgent))
using (client.SetDebugMode(OptionDebugMode))
using (client.SetAutoRedirect(!OptionManualRedirect)) {
return(await base.DownloadAsyncInner(client, getPreferredDestination, reportDestination, checkIfPaused, progress, cancellation));
}
}
protected override async Task <string> GetRedirectOverrideAsync(string url, CookieAwareWebClient client, CancellationToken cancellation)
{
using (client.SetUserAgent("Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")) {
var redirectTo = Reverse(Regex.Match(await client.DownloadStringTaskAsync(url), @"ysmm\s=\s'(.*?)'").Groups[1].Value);
if (cancellation.IsCancellationRequested)
{
return(redirectTo);
}
if (Test(redirectTo))
{
redirectTo = Unwrap(await client.DownloadStringTaskAsync(redirectTo)) ?? redirectTo;
if (cancellation.IsCancellationRequested)
{
return(redirectTo);
}
}
using (var stream = await client.OpenReadTaskAsync(redirectTo)) {
if (cancellation.IsCancellationRequested)
{
return(redirectTo);
}
if (client.ResponseHeaders?.Get("Content-Type").Contains(@"text/html", StringComparison.OrdinalIgnoreCase) == true)
{
redirectTo = Unwrap((await stream.ReadAsBytesAsync()).ToUtf8String()) ?? redirectTo;
}
}
return(redirectTo);
}
string Unwrap(string html)
{
var doc = new HtmlDocument();
doc.LoadHtml(html);
return(doc.DocumentNode.Descendants(@"a")
.FirstOrDefault(x => x.InnerText.Contains(@"click"))?
.Attributes[@"href"]?.Value);
}
}