/// <summary>
/// StartCheckingUrl method receives a separate stream for each site and checks it for availability.
/// </summary>
/// <param name="obj"> An object with all information about the checked site. </param>
private void StartCheckingUrl(object obj)
{
SettingsWebSiteMonitoring.SettingsWebSiteMonitoring webSite = (SettingsWebSiteMonitoring.SettingsWebSiteMonitoring)obj;
try
{
DateTime start = DateTime.Now;
WebClient wc = new WebClient();
string HTMLSource = wc.DownloadString(webSite.UrlSiteForCheck);
DateTime finish = DateTime.Now;
int leadTime = (int)finish.Second - (int)start.Second;
string message = "Attention! Method CheckUrl has checked ";
if (leadTime < webSite.MaxExpectedServerResponseTimeSeconds)
{
lock (Locker)
{
Logger.WriteMessage($"WebSite {webSite.DataAdministrator.siteName} with addres {webSite.UrlSiteForCheck} has been opened successfully.");
}
}
else
{
SendMessageAdmin(webSite, message + $"{webSite.DataAdministrator.siteName} webSite with addres {webSite.UrlSiteForCheck}. This webSite is not available.");
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Thread.Sleep(webSite.IntervalBetweenChecksSeconds * 1000);
}
/// <summary>
/// UpdateThreadsSitesDict method updates the data in the dictionary of key (site) - value pairs (separate thread).
/// </summary>
/// <param name="threadsSitesDict"> Dictionary of key (site) - value (separate thread). </param>
private void UpdateThreadsSitesDict(Dictionary <string, Thread> threadsSitesDict)
{
if (ListWebSiteSettings.Count > threadsSitesDict.Count)
{
foreach (var webSite in ListWebSiteSettings)
{
if (!threadsSitesDict.ContainsKey(webSite.UrlSiteForCheck))
{
threadsSitesDict[webSite.UrlSiteForCheck] = null;
}
}
}
if (ListWebSiteSettings.Count < threadsSitesDict.Count)
{
SettingsWebSiteMonitoring.SettingsWebSiteMonitoring result = null;
List <string> keys = new List <string>(threadsSitesDict.Keys);
foreach (var webSite in keys)
{
result = ListWebSiteSettings.Find((_webSite) => _webSite.UrlSiteForCheck == webSite);
if (result == null)
{
threadsSitesDict.Remove(webSite);
}
}
}
}
/// <summary>
/// SendMessage Admin method sends a letter to the administrator of the checked site if his site is unavailable.
/// </summary>
/// <param name="webSite"> Website with information about it. </param>
/// <param name="message"> Text for message. </param>
private async void SendMessageAdmin(SettingsWebSiteMonitoring.SettingsWebSiteMonitoring webSite, string message)
{
MailAddress from = new MailAddress("*****@*****.**");
MailAddress to = new MailAddress(webSite.DataAdministrator.adminEmailAddress);
MailMessage m = new MailMessage(from, to);
m.Subject = "Notification.";
m.Body = message;
SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.Credentials = new NetworkCredential("*****@*****.**", "");
smtp.EnableSsl = true;
await smtp.SendMailAsync(m);
}
