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Readarr/NzbDrone/IISController.cs

213 lines
7.3 KiB

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Runtime.Remoting;
using System.Timers;
using System.Xml.Linq;
using System.Xml.XPath;
using NLog;
namespace NzbDrone
{
internal class IISController
{
private static readonly Logger IISLogger = LogManager.GetLogger("IISExpress");
private static readonly Logger Logger = LogManager.GetLogger("IISController");
private static readonly string IISFolder = Path.Combine(Config.ProjectRoot, @"IISExpress\");
private static readonly string IISExe = Path.Combine(IISFolder, @"iisexpress.exe");
private static readonly string IISConfigPath = Path.Combine(IISFolder, "AppServer", "applicationhost.config");
private static Timer _pingTimer;
private static int _pingFailCounter;
public static Process IISProcess { get; private set; }
internal static string AppUrl
{
get { return string.Format("http://localhost:{0}/", Config.Port); }
}
internal static Process StartServer()
{
Logger.Info("Preparing IISExpress Server...");
IISProcess = new Process();
IISProcess.StartInfo.FileName = IISExe;
IISProcess.StartInfo.Arguments = String.Format("/config:\"{0}\" /trace:i", IISConfigPath);//"/config:"""" /trace:i";
IISProcess.StartInfo.WorkingDirectory = Config.ProjectRoot;
IISProcess.StartInfo.UseShellExecute = false;
IISProcess.StartInfo.RedirectStandardOutput = true;
IISProcess.StartInfo.RedirectStandardError = true;
IISProcess.StartInfo.CreateNoWindow = true;
IISProcess.OutputDataReceived += (OnOutputDataReceived);
IISProcess.ErrorDataReceived += (OnErrorDataReceived);
//Set Variables for the config file.
IISProcess.StartInfo.EnvironmentVariables.Add("NZBDRONE_PATH", Config.ProjectRoot);
IISProcess.StartInfo.EnvironmentVariables.Add("NZBDRONE_PID", Process.GetCurrentProcess().Id.ToString());
try
{
UpdateIISConfig();
}
catch (Exception e)
{
Logger.ErrorException("An error has occurred while trying to update the config file.", e);
}
Logger.Info("Starting process. [{0}]", IISProcess.StartInfo.FileName);
IISProcess.Start();
IISProcess.PriorityClass = ProcessPriorityClass.AboveNormal;
IISProcess.BeginErrorReadLine();
IISProcess.BeginOutputReadLine();
//Start Ping
_pingTimer = new Timer(300000) { AutoReset = true };
_pingTimer.Elapsed += (PingServer);
_pingTimer.Start();
return IISProcess;
}
private static void OnErrorDataReceived(object sender, DataReceivedEventArgs e)
{
if (e == null || String.IsNullOrWhiteSpace(e.Data))
return;
IISLogger.Error(e.Data);
}
internal static void StopServer()
{
KillProcess(IISProcess);
Logger.Info("Finding orphaned IIS Processes.");
foreach (var process in Process.GetProcessesByName("IISExpress"))
{
string processPath = process.MainModule.FileName;
Logger.Info("[{0}]IIS Process found. Path:{1}", process.Id, processPath);
if (NormalizePath(processPath) == NormalizePath(IISExe))
{
Logger.Info("[{0}]Process is considered orphaned.", process.Id);
KillProcess(process);
}
else
{
Logger.Info("[{0}]Process has a different start-up path. skipping.", process.Id);
}
}
}
private static void RestartServer()
{
_pingTimer.Stop();
Logger.Warn("Attempting to restart server.");
StopServer();
StartServer();
}
private static void PingServer(object sender, ElapsedEventArgs e)
{
try
{
var response = new WebClient().DownloadString(AppUrl + "/health");
if (!response.Contains("OK"))
{
throw new ServerException("Health services responded with an invalid response.");
}
if (_pingFailCounter > 0)
{
Logger.Info("Application pool has been successfully recovered.");
}
_pingFailCounter = 0;
}
catch (Exception ex)
{
_pingFailCounter++;
Logger.ErrorException("Application pool is not responding. Count " + _pingFailCounter, ex);
if (_pingFailCounter > 2)
{
RestartServer();
}
}
}
private static void OnOutputDataReceived(object s, DataReceivedEventArgs e)
{
if (e == null || String.IsNullOrWhiteSpace(e.Data) || e.Data.StartsWith("Request started:") ||
e.Data.StartsWith("Request ended:") || e.Data == ("IncrementMessages called"))
return;
if (e.Data.Contains(" NzbDrone."))
{
Console.WriteLine(e.Data);
return;
}
IISLogger.Trace(e.Data);
}
private static void UpdateIISConfig()
{
string configPath = Path.Combine(IISFolder, @"AppServer\applicationhost.config");
Logger.Info(@"Server configuration file: {0}", configPath);
Logger.Info(@"Configuring server to: [http://localhost:{0}]", Config.Port);
var configXml = XDocument.Load(configPath);
var bindings =
configXml.XPathSelectElement("configuration/system.applicationHost/sites").Elements("site").Where(
d => d.Attribute("name").Value.ToLowerInvariant() == "nzbdrone").First().Element("bindings");
bindings.Descendants().Remove();
bindings.Add(
new XElement("binding",
new XAttribute("protocol", "http"),
new XAttribute("bindingInformation", String.Format("*:{0}:", Config.Port))
));
configXml.Save(configPath);
}
private static void KillProcess(Process process)
{
if (process != null && !process.HasExited)
{
Logger.Info("[{0}]Killing process", process.Id);
process.Kill();
Logger.Info("[{0}]Waiting for exit", process.Id);
process.WaitForExit();
Logger.Info("[{0}]Process terminated successfully", process.Id);
}
}
public static string NormalizePath(string path)
{
if (String.IsNullOrWhiteSpace(path))
throw new ArgumentException("Path can not be null or empty");
var info = new FileInfo(path);
if (info.FullName.StartsWith(@"\\")) //UNC
{
return info.FullName.TrimEnd('/', '\\', ' ');
}
return info.FullName.Trim('/', '\\', ' ').ToLower();
}
}
}