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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using Duplicati.Library.Common.IO;
using Duplicati.Server.Serialization;
using Duplicati.Server.Serialization.Interface;
using Newtonsoft.Json;
namespace Duplicati.GUI.TrayIcon
{
public class HttpServerConnection : IDisposable
{
private static readonly string LOGTAG = Library.Logging.Log.LogTagFromType<HttpServerConnection>();
private const string LOGIN_SCRIPT = "login.cgi";
private const string STATUS_WINDOW = "index.html";
private const string XSRF_COOKIE = "xsrf-token";
private const string XSRF_HEADER = "X-XSRF-Token";
private const string AUTH_COOKIE = "session-auth";
private const string TRAYICONPASSWORDSOURCE_HEADER = "X-TrayIcon-PasswordSource";
private class BackgroundRequest
{
public readonly string Method;
public readonly string Endpoint;
public readonly Dictionary<string, string> Query;
public BackgroundRequest(string method, string endpoint, Dictionary<string, string> query)
{
this.Method = method;
this.Endpoint = endpoint;
this.Query = query;
}
}
private readonly string m_apiUri;
private readonly string m_baseUri;
private string m_password;
private readonly bool m_saltedpassword;
private string m_authtoken;
private string m_xsrftoken;
private static readonly System.Text.Encoding ENCODING = System.Text.Encoding.GetEncoding("utf-8");
public delegate void StatusUpdateDelegate(IServerStatus status);
public event StatusUpdateDelegate OnStatusUpdated;
public long m_lastNotificationId = -1;
public DateTime m_firstNotificationTime;
public delegate void NewNotificationDelegate(INotification notification);
public event NewNotificationDelegate OnNotification;
private long m_lastDataUpdateId = -1;
private bool m_disableTrayIconLogin;
private volatile IServerStatus m_status;
private volatile bool m_shutdown = false;
private volatile System.Threading.Thread m_requestThread;
private volatile System.Threading.Thread m_pollThread;
private readonly System.Threading.AutoResetEvent m_waitLock;
private readonly Dictionary<string, string> m_updateRequest;
private readonly Dictionary<string, string> m_options;
private readonly Program.PasswordSource m_passwordSource;
private string m_TrayIconHeaderValue => (m_passwordSource == Program.PasswordSource.Database) ? "database" : "user";
public IServerStatus Status { get { return m_status; } }
private readonly object m_lock = new object();
private readonly Queue<BackgroundRequest> m_workQueue = new Queue<BackgroundRequest>();
public HttpServerConnection(Uri server, string password, bool saltedpassword, Program.PasswordSource passwordSource, bool disableTrayIconLogin, Dictionary<string, string> options)
{
m_baseUri = Util.AppendDirSeparator(server.ToString(), "/");
m_apiUri = m_baseUri + "api/v1";
m_disableTrayIconLogin = disableTrayIconLogin;
m_firstNotificationTime = DateTime.Now;
m_password = password;
m_saltedpassword = saltedpassword;
m_options = options;
m_passwordSource = passwordSource;
m_updateRequest = new Dictionary<string, string>();
m_updateRequest["longpoll"] = "false";
m_updateRequest["lasteventid"] = "0";
UpdateStatus();
//We do the first request without long poll,
// and all the rest with longpoll
m_updateRequest["longpoll"] = "true";
m_updateRequest["duration"] = "5m";
m_waitLock = new System.Threading.AutoResetEvent(false);
m_requestThread = new System.Threading.Thread(ThreadRunner);
m_pollThread = new System.Threading.Thread(LongPollRunner);
m_requestThread.Name = "TrayIcon Request Thread";
m_pollThread.Name = "TrayIcon Longpoll Thread";
m_requestThread.Start();
m_pollThread.Start();
}
private void UpdateStatus()
{
m_status = PerformRequest<IServerStatus>("GET", "/serverstate", m_updateRequest);
m_updateRequest["lasteventid"] = m_status.LastEventID.ToString();
if (OnStatusUpdated != null)
OnStatusUpdated(m_status);
if (m_lastNotificationId != m_status.LastNotificationUpdateID)
{
m_lastNotificationId = m_status.LastNotificationUpdateID;
UpdateNotifications();
}
if (m_lastDataUpdateId != m_status.LastDataUpdateID)
{
m_lastDataUpdateId = m_status.LastDataUpdateID;
UpdateApplicationSettings();
}
}
private void UpdateNotifications()
{
var req = new Dictionary<string, string>();
var notifications = PerformRequest<INotification[]>("GET", "/notifications", req);
if (notifications != null)
{
foreach(var n in notifications.Where(x => x.Timestamp > m_firstNotificationTime))
if (OnNotification != null)
OnNotification(n);
if (notifications.Any())
m_firstNotificationTime = notifications.Select(x => x.Timestamp).Max();
}
}
private void UpdateApplicationSettings()
{
var req = new Dictionary<string, string>();
var settings = PerformRequest<Dictionary<string, string>>("GET", "/serversettings", req);
if (settings != null && settings.TryGetValue("disable-tray-icon-login", out var str))
m_disableTrayIconLogin = Library.Utility.Utility.ParseBool(str, false);
}
private void LongPollRunner()
{
while (!m_shutdown)
{
try
{
UpdateStatus();
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine("Request error: " + ex.Message);
Library.Logging.Log.WriteWarningMessage(LOGTAG, "TrayIconRequestError", ex, "Failed to get response");
}
}
}
private void ThreadRunner()
{
while (!m_shutdown)
{
try
{
BackgroundRequest req;
bool any = false;
do
{
req = null;
lock (m_lock)
if (m_workQueue.Count > 0)
req = m_workQueue.Dequeue();
if (m_shutdown)
break;
if (req != null)
{
any = true;
PerformRequest<string>(req.Method, req.Endpoint, req.Query);
}
} while (req != null);
if (!(any || m_shutdown))
m_waitLock.WaitOne(TimeSpan.FromMinutes(1), true);
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine("Request error: " + ex.Message);
Library.Logging.Log.WriteWarningMessage(LOGTAG, "TrayIconRequestError", ex, "Failed to get response");
}
}
}
public void Close()
{
m_shutdown = true;
m_waitLock.Set();
m_pollThread.Abort();
m_pollThread.Join(TimeSpan.FromSeconds(10));
if (!m_requestThread.Join(TimeSpan.FromSeconds(10)))
{
m_requestThread.Abort();
m_requestThread.Join(TimeSpan.FromSeconds(10));
}
}
private static string EncodeQueryString(Dictionary<string, string> dict)
{
return string.Join("&", Array.ConvertAll(dict.Keys.ToArray(), key => string.Format("{0}={1}", Uri.EscapeUriString(key), Uri.EscapeUriString(dict[key]))));
}
private class SaltAndNonce
{
// The JsonProperty attribute allows the Serializer.Deserialize method to
// set these readonly fields.
[JsonProperty]
public readonly string Salt = null;
[JsonProperty]
public readonly string Nonce = null;
}
private SaltAndNonce GetSaltAndNonce()
{
var httpOptions = new Duplicati.Library.Modules.Builtin.HttpOptions();
httpOptions.Configure(m_options);
using (httpOptions)
{
var req = (System.Net.HttpWebRequest) System.Net.WebRequest.Create(m_baseUri + LOGIN_SCRIPT);
req.Method = "POST";
req.UserAgent = "Duplicati TrayIcon Monitor, v" +
System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
req.Headers.Add(TRAYICONPASSWORDSOURCE_HEADER, m_TrayIconHeaderValue);
req.ContentType = "application/x-www-form-urlencoded";
Duplicati.Library.Utility.AsyncHttpRequest areq = new Library.Utility.AsyncHttpRequest(req);
var body = System.Text.Encoding.ASCII.GetBytes("get-nonce=1");
using (var f = areq.GetRequestStream(body.Length))
f.Write(body, 0, body.Length);
using (var r = (System.Net.HttpWebResponse) areq.GetResponse())
using (var s = areq.GetResponseStream())
using (var sr = new System.IO.StreamReader(s, ENCODING, true))
return Serializer.Deserialize<SaltAndNonce>(sr);
}
}
private string PerformLogin(string password, string nonce)
{
var httpOptions = new Duplicati.Library.Modules.Builtin.HttpOptions();
httpOptions.Configure(m_options);
using (httpOptions)
{
System.Net.HttpWebRequest req =
(System.Net.HttpWebRequest) System.Net.WebRequest.Create(m_baseUri + LOGIN_SCRIPT);
req.Method = "POST";
req.UserAgent = "Duplicati TrayIcon Monitor, v" +
System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
req.Headers.Add(TRAYICONPASSWORDSOURCE_HEADER, m_TrayIconHeaderValue);
req.ContentType = "application/x-www-form-urlencoded";
if (req.CookieContainer == null)
req.CookieContainer = new System.Net.CookieContainer();
req.CookieContainer.Add(new System.Net.Cookie("session-nonce", nonce, "/", req.RequestUri.Host));
//Wrap it all in async stuff
Duplicati.Library.Utility.AsyncHttpRequest areq = new Library.Utility.AsyncHttpRequest(req);
var body = System.Text.Encoding.ASCII.GetBytes("password=" +
Duplicati.Library.Utility.Uri.UrlEncode(password));
using (var f = areq.GetRequestStream(body.Length))
f.Write(body, 0, body.Length);
using (var r = (System.Net.HttpWebResponse) areq.GetResponse())
if (r.StatusCode == System.Net.HttpStatusCode.OK)
return (r.Cookies[AUTH_COOKIE] ?? r.Cookies[Library.Utility.Uri.UrlEncode(AUTH_COOKIE)]).Value;
return null;
}
}
private string GetAuthToken()
{
var salt_nonce = GetSaltAndNonce();
var sha256 = System.Security.Cryptography.SHA256.Create();
var password = m_password;
if (string.IsNullOrWhiteSpace(m_password))
return "";
if (!m_saltedpassword)
{
var str = System.Text.Encoding.UTF8.GetBytes(m_password);
var buf = Convert.FromBase64String(salt_nonce.Salt);
sha256.TransformBlock(str, 0, str.Length, str, 0);
sha256.TransformFinalBlock(buf, 0, buf.Length);
password = Convert.ToBase64String(sha256.Hash);
sha256.Initialize();
}
var nonce = Convert.FromBase64String(salt_nonce.Nonce);
sha256.TransformBlock(nonce, 0, nonce.Length, nonce, 0);
var pwdbuf = Convert.FromBase64String(password);
sha256.TransformFinalBlock(pwdbuf, 0, pwdbuf.Length);
var pwd = Convert.ToBase64String(sha256.Hash);
return PerformLogin(pwd, salt_nonce.Nonce);
}
private string GetXSRFToken()
{
var httpOptions = new Duplicati.Library.Modules.Builtin.HttpOptions();
httpOptions.Configure(m_options);
using (httpOptions)
{
System.Net.HttpWebRequest req =
(System.Net.HttpWebRequest) System.Net.WebRequest.Create(m_baseUri + STATUS_WINDOW);
req.Method = "GET";
req.UserAgent = "Duplicati TrayIcon Monitor, v" +
System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
req.Headers.Add(TRAYICONPASSWORDSOURCE_HEADER, m_TrayIconHeaderValue);
if (req.CookieContainer == null)
req.CookieContainer = new System.Net.CookieContainer();
//Wrap it all in async stuff
Duplicati.Library.Utility.AsyncHttpRequest areq = new Library.Utility.AsyncHttpRequest(req);
using (var r = (System.Net.HttpWebResponse) areq.GetResponse())
if (r.StatusCode == System.Net.HttpStatusCode.OK)
return (r.Cookies[XSRF_COOKIE] ?? r.Cookies[Library.Utility.Uri.UrlEncode(XSRF_COOKIE)]).Value;
return null;
}
}
private T PerformRequest<T>(string method, string urlfragment, Dictionary<string, string> queryparams)
{
var hasTriedXSRF = false;
var hasTriedPassword = false;
while (true)
{
try
{
return PerformRequestInternal<T>(method, urlfragment, queryparams);
}
catch (System.Net.WebException wex)
{
var httpex = wex.Response as HttpWebResponse;
if (httpex == null)
throw;
if (
!hasTriedXSRF &&
wex.Status == System.Net.WebExceptionStatus.ProtocolError &&
httpex.StatusCode == System.Net.HttpStatusCode.BadRequest &&
httpex.StatusDescription.IndexOf("XSRF", StringComparison.OrdinalIgnoreCase) >= 0)
{
hasTriedXSRF = true;
var t = httpex.Cookies[XSRF_COOKIE]?.Value;
if (string.IsNullOrWhiteSpace(t))
t = GetXSRFToken();
m_xsrftoken = Duplicati.Library.Utility.Uri.UrlDecode(t);
}
else if (
!hasTriedPassword &&
wex.Status == System.Net.WebExceptionStatus.ProtocolError &&
httpex.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
//Can survive if server password is changed via web ui
switch (m_passwordSource)
{
case Program.PasswordSource.Database:
if (Program.databaseConnection != null)
Program.databaseConnection.ApplicationSettings.ReloadSettings();
if (Program.databaseConnection != null && Program.databaseConnection.ApplicationSettings.WebserverPasswordTrayIcon != m_password)
m_password = Program.databaseConnection.ApplicationSettings.WebserverPasswordTrayIcon;
else
hasTriedPassword = true;
break;
case Program.PasswordSource.HostedServer:
if (Server.Program.DataConnection != null && Server.Program.DataConnection.ApplicationSettings.WebserverPassword != m_password)
m_password = Server.Program.DataConnection.ApplicationSettings.WebserverPassword;
else
hasTriedPassword = true;
break;
default:
throw new ArgumentOutOfRangeException();
}
m_authtoken = GetAuthToken();
}
else
throw;
}
}
}
private T PerformRequestInternal<T>(string method, string endpoint, Dictionary<string, string> queryparams)
{
queryparams["format"] = "json";
string query = EncodeQueryString(queryparams);
// TODO: This can interfere with running backups,
// as the System.Net.ServicePointManager is shared with
// all connections doing ftp/http requests
using (var httpOptions = new Duplicati.Library.Modules.Builtin.HttpOptions())
{
httpOptions.Configure(m_options);
var req =
(System.Net.HttpWebRequest) System.Net.WebRequest.Create(
new Uri(m_apiUri + endpoint + '?' + query));
req.Method = method;
req.Headers.Add("Accept-Charset", ENCODING.BodyName);
if (m_xsrftoken != null)
req.Headers.Add(XSRF_HEADER, m_xsrftoken);
req.UserAgent = "Duplicati TrayIcon Monitor, v" +
System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
req.Headers.Add(TRAYICONPASSWORDSOURCE_HEADER, m_TrayIconHeaderValue);
if (req.CookieContainer == null)
req.CookieContainer = new System.Net.CookieContainer();
if (m_authtoken != null)
req.CookieContainer.Add(new System.Net.Cookie(AUTH_COOKIE, m_authtoken, "/", req.RequestUri.Host));
if (m_xsrftoken != null)
req.CookieContainer.Add(new System.Net.Cookie(XSRF_COOKIE, m_xsrftoken, "/", req.RequestUri.Host));
//Wrap it all in async stuff
var areq = new Library.Utility.AsyncHttpRequest(req);
req.AllowWriteStreamBuffering = true;
//Assign the timeout, and add a little processing time as well
if (endpoint.Equals("/serverstate", StringComparison.OrdinalIgnoreCase) &&
queryparams.ContainsKey("duration"))
areq.Timeout = (int) (Duplicati.Library.Utility.Timeparser.ParseTimeSpan(queryparams["duration"]) +
TimeSpan.FromSeconds(5)).TotalMilliseconds;
using (var r = (System.Net.HttpWebResponse) areq.GetResponse())
using (var s = areq.GetResponseStream())
if (typeof(T) == typeof(string))
{
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
s.CopyTo(ms);
return (T) (object) ENCODING.GetString(ms.ToArray());
}
}
else
{
using (var sr = new System.IO.StreamReader(s, ENCODING, true))
return Serializer.Deserialize<T>(sr);
}
}
}
private void ExecuteAndNotify(string method, string urifragment, Dictionary<string, string> req)
{
lock (m_lock)
{
m_workQueue.Enqueue(new BackgroundRequest(method, urifragment, req));
m_waitLock.Set();
}
}
public void Pause(string duration = null)
{
var req = new Dictionary<string, string>();
if (!string.IsNullOrWhiteSpace(duration))
req.Add("duration", duration);
ExecuteAndNotify("POST", "/serverstate/pause", req);
}
public void Resume()
{
var req = new Dictionary<string, string>();
ExecuteAndNotify("POST", "/serverstate/resume", req);
}
public void StopTask(long id)
{
var req = new Dictionary<string, string>();
ExecuteAndNotify("POST", string.Format("/task/{0}/stop", Library.Utility.Uri.UrlPathEncode(id.ToString())), req);
}
public void AbortTask(long id)
{
var req = new Dictionary<string, string>();
ExecuteAndNotify("POST", string.Format("/task/{0}/abort", Library.Utility.Uri.UrlPathEncode(id.ToString())), req);
}
public void RunBackup(long id, bool forcefull = false)
{
var req = new Dictionary<string, string>();
if (forcefull)
req.Add("full", "true");
ExecuteAndNotify("POST", string.Format("/backup/{0}/start", Library.Utility.Uri.UrlPathEncode(id.ToString())), req);
}
public void DismissNotification(long id)
{
var req = new Dictionary<string, string>();
ExecuteAndNotify("DELETE", string.Format("/notification/{0}", Library.Utility.Uri.UrlPathEncode(id.ToString())), req);
}
public void Dispose()
{
Close();
}
public string StatusWindowURL
{
get
{
if (m_authtoken != null)
return m_baseUri + STATUS_WINDOW + (m_disableTrayIconLogin ? string.Empty : "?auth-token=" + GetAuthToken());
return m_baseUri + STATUS_WINDOW;
}
}
}
}
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