///<summary>Called when we have received some data from the client.</summary>
///<param name="ar">The result of the asynchronous operation.</param>
private void OnStartSocksProtocol(IAsyncResult ar)
{
int Ret;
try
{
Ret = ClientSocket.EndReceive(ar);
if (Ret <= 0)
{
Dispose();
return;
}
if (Buffer[0] == 4)
{
//SOCKS4 Protocol
if (MustAuthenticate)
{
Dispose();
return;
}
else
{
Handler = new Socks4Handler(ClientSocket, OnEndSocksProtocol);
}
}
else if (Buffer[0] == 5)
{
//SOCKS5 Protocol
if (MustAuthenticate && AuthList == null)
{
Dispose();
return;
}
Handler = new Socks5Handler(ClientSocket, OnEndSocksProtocol, AuthList);
}
else
{
Dispose();
return;
}
Handler.StartNegotiating();
}
catch
{
Dispose();
}
}
public override async Task InitializeAsync()
{
List <HttpClientProxy> proxies = new List <HttpClientProxy>();
if (JsonArray != null)
{
foreach (JObject obj in JsonArray)
{
string proxyType = obj["type"]?.Value <string>() ?? string.Empty;
if (proxyType.Equals("http", StringComparison.OrdinalIgnoreCase))
{
string url = obj["url"]?.Value <string>();
if (string.IsNullOrWhiteSpace(url))
{
throw new Exception("Proxy URL must be specified and not empty.");
}
string username = obj["username"]?.Value <string>();
string password = obj["password"]?.Value <string>();
IWebProxy proxy = username != null
? new WebProxy(url, false, new string[0], new NetworkCredential(username, password))
: new WebProxy(url);
proxies.Add(new HttpClientProxy(CreateNewClient(proxy), $"{username}@{url}"));
}
else if (proxyType.Equals("socks", StringComparison.OrdinalIgnoreCase))
{
string url = obj["url"]?.Value <string>();
if (string.IsNullOrWhiteSpace(url))
{
throw new Exception("Proxy URL must be specified and not empty.");
}
Uri uri = new Uri(url);
string username = obj["username"]?.Value <string>();
string password = obj["password"]?.Value <string>();
var handler = new Socks5Handler(uri, username, password);
handler.ResolveDnsLocally = ResolveDnsLocally;
proxies.Add(new HttpClientProxy(CreateNewClient(handler), $"{username}@{uri.Host}:{uri.Port}"));
}
else
{
if (proxyType == string.Empty)
{
throw new Exception("Proxy type must be specified.");
}
throw new Exception($"Unknown proxy type: {proxyType}");
}
}
}
// add a direct connection client too
proxies.Add(new HttpClientProxy(CreateNewClient((IWebProxy)null), "baseconnection/none"));
var testTasks = proxies.Select(proxy => Task.Run(async() =>
{
bool success = true;
for (int i = 0; i < 4; i++)
{
success = true;
try
{
var result = await proxy.Client.GetAsync("https://a.4cdn.org/po/catalog.json");
if (!result.IsSuccessStatusCode)
{
success = false;
}
}
catch (Exception ex)
{
Program.Log($"{proxy.Name} failed: {ex}", true);
success = false;
}
if (success)
{
break;
}
}
if (success)
{
Program.Log($"Proxy '{proxy.Name}' tested successfully");
ProxyClients.Add(proxy);
Interlocked.Increment(ref _proxyCount);
}
else
{
Program.Log($"Proxy '{proxy.Name}' failed test, will be ignored");
}
}));
await Task.WhenAll(testTasks);
}