ProxySharp

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using System;
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using System.Net;
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using System.Xml.Serialization;
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namespace ProxySharp
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{
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	/// <summary>
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	/// Information about the proxy server.
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	/// </summary>
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	public class ProxyInfo : IEquatable<ProxyInfo>
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	{
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		public string Host { get; set; } = string.Empty;
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		public int Port { get; set; }
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		[XmlElement(IsNullable = false)]
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		public string UserName { get; set; }
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		[XmlElement(IsNullable = false)]
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		public string Password { get; set; }
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		public int FailsCount { get; set; }
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		public int UsedCount { get; set; }
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		[XmlIgnore]
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		public Exception LastException { get; set; }
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		[XmlIgnore]
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		public bool IsEmpty => string.IsNullOrEmpty(Host) || Port == 0;
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		[XmlIgnore]
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		public float Rating => UsedCount > 0
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			? 1f - FailsCount / (float)UsedCount
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			: 1f;
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		[XmlIgnore]
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		public bool HasCredentials => !(string.IsNullOrWhiteSpace(UserName) || string.IsNullOrWhiteSpace(Password));
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		public static ProxyInfo Empty { get; } = new ProxyInfo();
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		public bool Equals(ProxyInfo obj)
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		{
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			if (obj == null)
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				return false;
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			return string.Equals(Host, obj.Host)
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				&& Port == obj.Port
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				&& string.Equals(UserName, obj.UserName)
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				&& string.Equals(Password, obj.Password);
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		}
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		public override bool Equals(object obj)
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		{
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			if (obj == null)
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				return false;
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			if (ReferenceEquals(this, obj))
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				return true;
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			if (obj is ProxyInfo info)
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				return Equals(info);
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			return false;
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		}
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		public override int GetHashCode()
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		{
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			return Host.GetHashCode() ^ Port.GetHashCode();
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		}
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		public override string ToString()
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		{
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			return $"{Host?.Trim()}:{Port}";
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		}
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		public virtual WebProxy ToWebProxy()
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        {
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			var webProxy = new WebProxy(Host, Port)
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			{
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				BypassProxyOnLocal = false,
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				UseDefaultCredentials = false
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			};
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			if (HasCredentials)
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				webProxy.Credentials = new NetworkCredential(UserName, Password);
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			return webProxy;
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		}
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	}
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}