Add code

Endpoint/HtmlEndpoint.cs

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+using System;
+using System.IO;
+using System.Text;
+using System.Xml;
+using HtmlAgilityPack;
+
+namespace Endpoint
+{
+	/// <summary>
+	/// A website endpoint
+	/// </summary>
+	public class HtmlEndpoint : HttpEndpoint
+	{
+		/// <summary>
+		/// Gets or sets the xpath query for the html document
+		/// </summary>
+		/// <value>The xpath query.</value>
+		public string XpathQuery { get; set; }
+
+		/// <summary>
+		/// Gets or sets the expected query results.
+		/// </summary>
+		/// <value>The expected query results.</value>
+		public string ExpectedXpathResult { get; set; }
+
+		/// <summary>
+		/// Gets or sets the post.
+		/// </summary>
+		/// <value>The post.</value>
+		public string RequestContent { get; set; }
+
+		/// <summary>
+		/// Returns the HTML parsed into a standard <see cref="XmlDocument"/>.
+		/// Uses the <see cref="HtmlAgilityPack"/> library for "out of the web" (poorly formatted) html file support.
+		/// </summary>
+		/// <param name="html">The HTML</param>
+		/// <returns>An <see cref="XmlDocument"/> from the HTML</returns>
+		private static XmlDocument getHtmlXml(string html)
+		{
+			var htmlDocument = new HtmlDocument();
+			htmlDocument.LoadHtml(html);
+
+			var xmlDocument = new XmlDocument();
+			using (Stream stream = new MemoryStream())
+			{
+				XmlWriter xmlTextWriter = new XmlTextWriter(stream, Encoding.UTF8);
+
+				htmlDocument.Save(xmlTextWriter);
+
+				stream.Seek(0, SeekOrigin.Begin);
+
+				using (var sr = new StreamReader(stream))
+					xmlDocument.Load(sr);
+
+				xmlTextWriter.Close();
+			}
+			return xmlDocument;
+		}
+
+		/// <summary>
+		/// Returns the HTML grabbed from the passed in URL parsed into a standard <see cref="XmlDocument"/>.
+		/// Uses the <see cref="HtmlAgilityPack"/> library for "out of the web" html file support.
+		/// </summary>
+		/// <param name="url">The URL.</param>
+		/// <param name="requestContent">The post data.</param>
+		/// <returns>An <see cref="XmlDocument"/> from the HTML</returns>
+		private static XmlDocument getHtmlXml(Uri url, string requestContent)
+		{
+			return getHtmlXml(GetUrlContent(url, "application/x-www-form-urlencoded", requestContent, null));
+		}
+
+		/// <summary>
+		/// Gets the current status result of the endpoint
+		/// </summary>
+		/// <returns>Status</returns>
+		public override Status GetStatus()
+		{
+			var baseStatus = base.GetStatus();
+			if (baseStatus != Status.Up)
+				return baseStatus;
+
+			try
+			{
+				var xml = getHtmlXml(Uri, RequestContent);
+
+				// xml.Save(@"c:\test.xml");
+
+				var nodes = xml.SelectNodes(XpathQuery);
+
+				// verify html has expected value
+				if (nodes == null || nodes.Count == 0)
+				{
+					StatusDescription = "Couldn't find expected value in html";
+					return Status.Error;
+				}
+				var value = nodes[0].Value.Trim();
+				if (value != ExpectedXpathResult)
+				{
+					StatusDescription = String.Format("Result was: '{0}', was expecting '{1}'", value,
+					                                  ExpectedXpathResult);
+					return Status.Error;
+				}
+			}
+			catch (Exception ex)
+			{
+				StatusDescription = ex.Message;
+				return Status.Error;
+			}
+			return Status.Up;
+		}
+	}
+}