private void CasAuthenticate(Site site, ref CookieCollection cookies, ref HtmlDocument document)
{
// read the parameters we need to know
var form = document.GetElementbyId("fm1");
var hidden = document.DocumentNode.Descendants("input").Where(a => a.Attributes["type"].Value == "hidden");
var parameters = new StringBuilder();
foreach (var p in hidden)
{
parameters.Append(string.Format("{0}={1}&", p.Attributes["name"].Value, p.Attributes["value"].Value));
}
var action = form.Attributes["action"];
var username = ConfigurationSettings.AppSettings["username"];
var password = ConfigurationSettings.AppSettings["password"];
parameters.Append(string.Format("{0}={1}&", "username", username));
parameters.Append(string.Format("{0}={1}", "password", password));
// location to redirect back to the application
var redirectLocation = string.Empty;
MakeWebCallWithParameters("https://cas.ucdavis.edu:8443" + action.Value, parameters.ToString(), ref cookies, out redirectLocation);
// get the ticket
var ticketUrl = string.Format("https://cas.ucdavis.edu:8443/cas/login?service={0}", redirectLocation);
var location = string.Empty;
ErrorTypes errorType;
MakeWebCall(ticketUrl, false, ref cookies, ref document, out location, out errorType);
// get the aspx auth id
var nothing = string.Empty;
MakeWebCall(location, false, ref cookies, ref document, out nothing, out errorType);
}
private void ErrorResolution(Site site, int statuscode, ErrorTypes errorType)
{
if (_restartCodes.Contains(statuscode) && (site.FailureCount < 4 || site.FailureCount % 10 == 0))
{
// only notify after 15 minutes
if (site.FailureCount == 3)
{
// trigger an email about a failed site
Console.WriteLine("Admin Intervene ({0}) with error {1}. Failure count {2}", site.Url, errorType.ToString(), site.FailureCount);
}
// only attempt a restart for the first few times
else
{
// try to restart the application pool
Console.WriteLine("Attempting restart ({0}). Failure count {1}", site.Url, site.FailureCount);
RestartApplicationPool(site.AppPool);
}
}
}
/// <summary>
/// Loads a webpage and returns the status
/// </summary>
/// <param name="url"></param>
/// <returns>true = good, false = bad</returns>
private bool CheckSite(Site site, out int status, out ErrorTypes errorType)
{
// load the webpage
try
{
var cookies = new CookieCollection();
var document = new HtmlDocument();
// make the first call
var nothing = string.Empty;
status = MakeWebCall(site.Url, true, ref cookies, ref document, out nothing, out errorType);
// is cas protected, we need to authenticate
if (site.AuthenticationType == AuthenticationType.UcdCas && document.GetElementbyId("cas") != null)
{
CasAuthenticate(site, ref cookies, ref document);
status = MakeWebCall(site.Url, true, ref cookies, ref document, out nothing, out errorType);
}
return status == 200;
}
catch (WebException webEx)
{
status = (int)((HttpWebResponse)webEx.Response).StatusCode;
var stream = new StreamReader(webEx.Response.GetResponseStream());
var page = stream.ReadToEnd();
if (page.Contains("Cannot open database"))
{
errorType = ErrorTypes.Database;
}
else
{
errorType = ErrorTypes.Unknown;
}
}
return false;
}
