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85 lines
3.3 KiB
85 lines
3.3 KiB
using System;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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using com.LandonKey.SocksWebProxy;
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using com.LandonKey.SocksWebProxy.Proxy;
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using NzbDrone.Common.Cache;
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using NzbDrone.Common.Extensions;
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namespace NzbDrone.Common.Http.Proxy
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{
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public interface ICreateManagedWebProxy
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{
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IWebProxy GetWebProxy(HttpProxySettings proxySettings);
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}
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public class ManagedWebProxyFactory : ICreateManagedWebProxy
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{
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private readonly ICached<IWebProxy> _webProxyCache;
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public ManagedWebProxyFactory(ICacheManager cacheManager)
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{
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_webProxyCache = cacheManager.GetCache<IWebProxy>(GetType(), "webProxy");
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}
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public IWebProxy GetWebProxy(HttpProxySettings proxySettings)
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{
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var proxy = _webProxyCache.Get(proxySettings.Key, () => CreateWebProxy(proxySettings), TimeSpan.FromMinutes(5));
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_webProxyCache.ClearExpired();
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return proxy;
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}
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private IWebProxy CreateWebProxy(HttpProxySettings proxySettings)
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{
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switch (proxySettings.Type)
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{
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case ProxyType.Http:
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if (proxySettings.Username.IsNotNullOrWhiteSpace() && proxySettings.Password.IsNotNullOrWhiteSpace())
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{
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return new WebProxy(proxySettings.Host + ":" + proxySettings.Port, proxySettings.BypassLocalAddress, proxySettings.BypassListAsArray, new NetworkCredential(proxySettings.Username, proxySettings.Password));
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}
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else
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{
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return new WebProxy(proxySettings.Host + ":" + proxySettings.Port, proxySettings.BypassLocalAddress, proxySettings.BypassListAsArray);
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}
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case ProxyType.Socks4:
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return new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(proxySettings.Host), proxySettings.Port, ProxyConfig.SocksVersion.Four, proxySettings.Username, proxySettings.Password), false);
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case ProxyType.Socks5:
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return new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(proxySettings.Host), proxySettings.Port, ProxyConfig.SocksVersion.Five, proxySettings.Username, proxySettings.Password), false);
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}
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return null;
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}
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private static IPAddress GetProxyIpAddress(string host)
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{
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IPAddress ipAddress;
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if (!IPAddress.TryParse(host, out ipAddress))
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{
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try
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{
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ipAddress = Dns.GetHostEntry(host).AddressList.OrderByDescending(a => a.AddressFamily == AddressFamily.InterNetwork).First();
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}
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catch (Exception e)
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{
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throw new InvalidOperationException(string.Format("Unable to resolve proxy hostname '{0}' to a valid IP address.", host), e);
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}
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}
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return ipAddress;
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}
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private static int GetNextFreePort()
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{
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var listener = new TcpListener(IPAddress.Loopback, 0);
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listener.Start();
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var port = ((IPEndPoint)listener.LocalEndpoint).Port;
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listener.Stop();
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return port;
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}
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}
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}
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