/// <summary>
/// Scans a given page for proxy servers.
/// </summary>
/// <param name="proxyListingPage">The proxy listing page.</param>
/// <param name="parseAsRawText">If the page must be parsed as raw text (no HTML tags)</param>
/// <param name="hostPortEx">The custom parsing expression (providing "address" or "host" and "port" tags) or null to use default</param>
/// <param name="route"></param>
/// <param name="testTarget"></param>
/// <returns></returns>
public IEnumerable <ProxyServer> ScanPage(Uri proxyListingPage, bool parseAsRawText, string hostPortEx, Route route, Uri testTarget)
{
string proxyListingPageText = null;
try
{
proxyListingPageText = Downloader.Download(proxyListingPage, parseAsRawText, route);
}
catch (ProxyRouteException)
{ }
if (proxyListingPageText == null)
{
yield break;
}
var results = new Queue <ProxyServer>();
var waitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
var thread = new Thread(delegate()
{
HostScanner.Scan(proxyListingPageText, hostPortEx).AsParallel().WithDegreeOfParallelism(63)
.ForAll(delegate(ProxyServer proxyServer)
{
if (!ProxyValidator.Validate(proxyServer, testTarget, route))
{
return;
}
lock (results)
results.Enqueue(proxyServer);
waitHandle.Set();
});
lock (results)
results.Enqueue(null);
waitHandle.Set();
});
thread.Start();
for (; ;)
{
waitHandle.WaitOne();
lock (results)
{
while (results.Count > 0)
{
var result = results.Dequeue();
if (result == null)
{
yield break;
}
yield return(result);
}
}
}
}
/// <summary>
/// Scans a given page for proxy servers.
/// </summary>
/// <param name="proxyServers"></param>
/// <param name="proxyListingPage">The proxy listing page.</param>
/// <param name="parseAsRawText">if set to <c>true</c> [parse as raw text].</param>
/// <param name="hostPortEx">The host port ex.</param>
/// <param name="route"></param>
/// <param name="testTarget"></param>
public void ScanPage(IList <ProxyServer> proxyServers, Uri proxyListingPage, bool parseAsRawText, string hostPortEx, Route route, Uri testTarget)
{
var proxyListingPageText = Downloader.Download(proxyListingPage, parseAsRawText, route);
if (proxyListingPageText != null)
{
// All runs as parallel, since this is a massive network check with no CPU load at all
// TODO: parallelize more
HostScanner.Scan(proxyListingPageText, hostPortEx).AsParallel().WithDegreeOfParallelism(63).ForAll(
delegate(ProxyServer proxyServer)
{
if (ProxyValidator.Validate(proxyServer, testTarget, route))
{
lock (proxyServers)
proxyServers.Add(proxyServer);
}
});
}
}
