private static async Task <bool> CheckProxy(ProxyInfo info, ProxyType proxyType)
{
var handler =
proxyType == ProxyType.Socks
? (HttpMessageHandler) new ProxyClientHandler <Socks5>(new ProxySettings
{
Port = info.Port,
Host = info.Host
})
: new HttpClientHandler
{
Proxy = new WebProxy(info.Host, info.Port),
};
using (var hc = new HttpClient(handler))
{
hc.DefaultRequestHeaders.Add("User-Agent", "rto/proxy-app");
string response = null;
try
{
response = await hc.GetStringAsync("http://bt2.rutracker.org/myip?json");
var proxy = JObject.Parse(response)["proxy"];
if (proxy.ToString() == info.Host)
{
Log.Information("Proxy OK");
return(true);
}
Log.Error("Proxy mismatch. Response: {Response}", response);
return(false);
}
catch (HttpRequestException)
{
Log.Error("Proxy check failed");
}
catch (Exception e)
{
Log.Error(e, "Unknown error during proxy check. Response: {Response}", response);
}
}
return(false);
}
internal static async Task Main()
{
var config = new ConfigurationBuilder()
.AddJsonFile("config.json", false)
.Build();
Log.Logger = new LoggerConfiguration()
.ReadFrom.Configuration(config)
.CreateLogger();
Log.Information("RtoProxyDaemon by Zawodskoj");
var rtoConfig = config.GetSection("RtoProxy").Get <RtoProxyConfiguration>();
var listener = TcpListener.Create(rtoConfig.Port);
listener.Start();
Log.Debug("Listener on port {Port} started", rtoConfig.Port);
Listen(listener);
while (true)
{
const int refreshDelaySec = 300;
const int retryDelaySec = 5;
var newProxy = await GetNewProxy(rtoConfig.ProxyType);
if (newProxy != null)
{
lock (SyncRoot)
{
_curProxy = newProxy;
}
await Task.Delay(TimeSpan.FromSeconds(refreshDelaySec));
}
else
{
await Task.Delay(TimeSpan.FromSeconds(retryDelaySec));
}
}
}
private static async void Tunnel(ProxyInfo curProxy, TcpClient client)
{
using (var stream = client.GetStream())
{
try
{
using (var proxyClient = new TcpClient(curProxy.Host, curProxy.Port))
using (var proxyStream = proxyClient.GetStream())
{
await Task.WhenAny(
proxyStream.CopyToAsync(stream),
stream.CopyToAsync(proxyStream));
}
}
catch (Exception e)
{
Log.Debug(e, "Exception during tunneling proxy");
}
}
}
private static async Task <ProxyInfo> GetNewProxy(ProxyType proxyType)
{
try
{
using (var hc = new HttpClient())
{
var response = await hc.GetStringAsync(
"https://api.rufolder.net/JIkJnKmlsFIB/v2/" +
(proxyType == ProxyType.Http ? "proxies" : "socks"));
var splitted = response.Split(":");
if (splitted.Length != 2)
{
Log.Error("Invalid response format. Response: {Response}", response);
return(null);
}
if (!ushort.TryParse(splitted[1], out var port))
{
Log.Error("Invalid port. Response: {Response}", response);
return(null);
}
var info = new ProxyInfo(splitted[0], port);
Log.Information("Got new proxy: {Host}:{Port}", info.Host, info.Port);
return(await CheckProxy(info, proxyType) ? info : null);
}
}
catch (HttpRequestException e)
{
Log.Error(e, "Request to backend failed");
}
catch (Exception e)
{
Log.Error(e, "Unknown error");
}
return(null);
}