protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
var baseUri = new Uri(request.RequestUri, "/");
request.Headers.Add("User-Agent", UserAgent);
HttpResponseMessage res = null;
string cookie;
using (CookieHeaderLock.GetReadLock())
cookie = Cookies;
if (cookie != null)
{
request.Headers.Add("Cookie", cookie);
res = await base.SendAsync(request, cancellationToken);
if (!CloudflareDetector.IsClearanceRequired(res))
{
return(res);
}
res.Dispose();
res = null;
}
if (!await semaphoreSlim.WaitAsync(0))
{
await semaphoreSlim.WaitAsync();
semaphoreSlim.Release();
if (Cookies == null)
{
throw new BypassFailed();
}
using (CookieHeaderLock.GetReadLock())
cookie = Cookies;
}
else
{
using (await CookieHeaderLock.GetWriteLockAsync())
{
var cf = new CloudflareSolver(UserAgent)
{
MaxTries = 3,
ClearanceDelay = 5000,
};
try
{
var cfs = await cf.Solve(request.RequestUri).ConfigureAwait(false);
if (cfs.Success)
{
Cookies = cfs.Cookies.AsHeaderString();
return(await base.SendAsync(request, cancellationToken));
}
}
catch
{
// 2020-02-29
// New CF Challenge : __cf_chl_jschl_tk__
// https://github.com/RyuzakiH/CloudflareSolverRe/issues/14
}
try
{
BypassByBrowser frm = null;
try
{
frm = Application.Current.Dispatcher.Invoke(() => new BypassByBrowser(new UriBuilder(request.RequestUri)
{
Path = null, Query = null
}.Uri)
{
Owner = Application.Current.MainWindow,
});
var status = Application.Current.Dispatcher.Invoke(frm.ShowDialog) ?? false;
frm.Wait.Wait();
if (status)
{
cookie = Cookies = frm.Cookies.GetCookieHeader(baseUri);
}
else
{
throw new BypassFailed();
}
}
catch (BypassFailed)
{
throw;
}
finally
{
if (frm != null)
{
Application.Current.Dispatcher.Invoke(frm.Close);
Application.Current.Dispatcher.Invoke(frm.Dispose);
}
}
}
finally
{
semaphoreSlim.Release();
}
}
}
if (cookie != null)
{
request.Headers.Add("Cookie", cookie);
}
res = await base.SendAsync(request, cancellationToken);
if (!CloudflareDetector.IsClearanceRequired(res))
{
return(res);
}
res.Dispose();
res = null;
throw new BypassFailed();
}
