code.grnet.gr Git - pithos-ms-client/blob - trunk%2FPithos.Client.WPF%2FPithosAccount.cs

   1 #region
   2 /* -----------------------------------------------------------------------
   3  * <copyright file="PithosAccount.cs" company="GRNet">
   4  *
   5  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or
   8  * without modification, are permitted provided that the following
   9  * conditions are met:
  10  *
  11  *   1. Redistributions of source code must retain the above
  12  *      copyright notice, this list of conditions and the following
  13  *      disclaimer.
  14  *
  15  *   2. Redistributions in binary form must reproduce the above
  16  *      copyright notice, this list of conditions and the following
  17  *      disclaimer in the documentation and/or other materials
  18  *      provided with the distribution.
  19  *
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  25  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * The views and conclusions contained in the software and
  35  * documentation are those of the authors and should not be
  36  * interpreted as representing official policies, either expressed
  37  * or implied, of GRNET S.A.
  38  * </copyright>
  39  * -----------------------------------------------------------------------
  40  */
  41 #endregion
  42
  43 // </copyright>
  44 // -----------------------------------------------------------------------
  45
  46 using System.IO;
  47 using System.Reflection;
  48 using Pithos.Client.WPF.Preferences;
  49 using Pithos.Network;
  50 using log4net;
  51
  52 namespace Pithos.Client.WPF
  53 {
  54     using System;
  55     using System.Collections.Generic;
  56     using System.Linq;
  57     using System.Text;
  58     using System.Net;
  59     using System.Threading.Tasks;
  60     using System.Diagnostics.Contracts;
  61     using System.Diagnostics;
  62     using System.Net.Sockets;
  63
  64     /// <summary>
  65     /// TODO: Update summary.
  66     /// </summary>
  67     /// <summary>
  68     /// Retrieves an account name and token from PITHOS
  69     /// </summary>
  70     public static class PithosAccount
  71     {
  72         private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
  73
  74         /// <summary>
  75         /// Asynchronously retrieves PITHOS credentials
  76         /// </summary>
  77         /// <param name="loginUrl">URL to retrieve the account info from PITHOS. Must end with =</param>
  78         /// <returns>The credentials wrapped in a Task</returns>
  79         public static NetworkCredential RetrieveCredentials(string loginUrl,string accountName=null)
  80         {
  81             Contract.Requires(Uri.IsWellFormedUriString(loginUrl, UriKind.Absolute));
  82
  83             if (!Uri.IsWellFormedUriString(loginUrl, UriKind.Absolute))
  84                 throw new ArgumentException("The pithosSite parameter must be a valid absolute URL", "loginUrl");
  85
  86             //int port = GetFreePort();
  87
  88             //TODO:Force logout here to take care of existing cookies
  89
  90
  91             //var listenerUrl = String.Format("http://127.0.0.1:{0}", port);
  92             var listenerUrl = "pithos://127.0.0.1";
  93
  94
  95
  96             //var receiveCredentials = ListenForRedirectAsync(port);
  97
  98             //var logoutUrl = loginUrl.Replace("login", "im/logout");
  99             //var logoutProcess=Process.Start(logoutUrl);
 100             //TaskEx.Delay(2000).Wait();
 101             var uriBuilder = new UriBuilder(loginUrl)
 102                                  {
 103                                      Query = String.Format("next={0}&force=", listenerUrl)
 104                                  };
 105
 106             var retrieveUri = uriBuilder.Uri;
 107
 108
 109             var browser = new LoginView(retrieveUri,accountName);
 110             if (true == browser.ShowDialog())
 111             {
 112                 return new NetworkCredential(browser.Account, browser.Token);
 113             }
 114             return null;
 115
 116 /*
 117
 118             Log.InfoFormat("[RETRIEVE] Open Browser at {0}", retrieveUri);
 119             Process.Start(retrieveUri.ToString());
 120
 121             return receiveCredentials;
 122 */
 123         }
 124
 125 /*
 126         private static async Task<NetworkCredential> ListenHttpForRedirectAsync(string listenerUrl)
 127         {
 128             using (var listener = new HttpListener())
 129             {
 130                 listener.Prefixes.Add(listenerUrl);
 131
 132                 Log.InfoFormat("[RETRIEVE] Listening at {0}", listenerUrl);
 133
 134
 135                 try
 136                 {
 137                     listener.Start();
 138
 139                     var context = await listener.GetContextAsync()
 140                                             .WithTimeout(TimeSpan.FromMinutes(5));
 141
 142                     var request = context.Request;
 143                     Log.InfoFormat("[RETRIEVE] Got Connection {0}", request.RawUrl);
 144
 145                     var query = request.QueryString;
 146                     var userName = query["user"];
 147                     var token = query["token"];
 148                     if (String.IsNullOrWhiteSpace(userName) ||
 149                         String.IsNullOrWhiteSpace(token))
 150                     {
 151                         Respond(context, "Failure", "The server did not return a username or token");
 152                         Log.ErrorFormat("[RETRIEVE] No credentials returned by server");
 153                         throw new Exception("The server did not return a username or token");
 154                     }
 155                     else
 156                     {
 157                         Log.InfoFormat("[RETRIEVE] Credentials retrieved user:{0} token:{1}", userName, token);
 158                         Respond(context, "Authenticated", "Got It");
 159
 160                         return new NetworkCredential(userName, token);
 161                     }
 162                 }
 163                 catch (Exception exc)
 164                 {
 165                     Log.Error("[RETRIEVE][ERROR] Receive connection {0}", exc);
 166                     throw;
 167                 }
 168             }
 169         }
 170 */
 171
 172         private static async Task<NetworkCredential> ListenForRedirectAsync(int port)
 173         {
 174             var listener = new TcpListener(IPAddress.Any, port);
 175             Log.InfoFormat("[RETRIEVE] Listening at {0}", port);
 176
 177             try
 178             {
 179                 listener.Start();
 180
 181                 using (var client = await listener.AcceptTcpClientAsync()
 182                                         .WithTimeout(TimeSpan.FromMinutes(5)))
 183                 {
 184                     using (var stream = client.GetStream())
 185                     using (var reader=new StreamReader(stream))
 186                     {
 187                         var request = await reader.ReadLineAsync();
 188                         //BUG
 189                         //TODO: Add proper warnings here if the content is empty, don't just throw an exception
 190                         //This may be a common occurence
 191
 192                         if (String.IsNullOrWhiteSpace(request))
 193                             throw new PithosException("The server did send any information");
 194                         Log.InfoFormat("[RETRIEVE] Got Connection {0}", request);
 195
 196
 197                         var items = ParseResponse(request);
 198
 199                         var userName = items["user"];
 200                         var token = items["token"];
 201                         if (String.IsNullOrWhiteSpace(userName) ||
 202                             String.IsNullOrWhiteSpace(token))
 203                         {
 204                             Respond(stream, "Failure", "The server did not return a username or token");
 205                             Log.ErrorFormat("[RETRIEVE] No credentials returned by server");
 206                             throw new PithosException("The server did not return a username or token");
 207                         }
 208                         else
 209                         {
 210                             Log.InfoFormat("[RETRIEVE] Credentials retrieved user:{0} token:{1}", userName, token);
 211                             Respond(stream, "Authenticated", "Got It");
 212                         }
 213                         return new NetworkCredential(userName, token);
 214                     }
 215                 }
 216             }
 217             catch (Exception exc)
 218             {
 219                 Log.Error("[RETRIEVE][ERROR] Receive connection {0}", exc);
 220                 throw new PithosException("An error occured while retrieving credentials",exc);
 221             }
 222         }
 223
 224         private static Dictionary<string, string> ParseResponse(string request)
 225         {
 226             var parts = request.Split(' ');
 227             var query = parts[1].TrimStart('/', '?');
 228
 229             var items = query.Split('&')
 230                 .Select(pair => pair.Split('='))
 231                 .ToDictionary(arr => arr[0].ToLower(), arr => Uri.UnescapeDataString(arr[1]));
 232             return items;
 233         }
 234
 235
 236         private static void Respond(HttpListenerContext context,string title,string message)
 237         {
 238             var response = context.Response;
 239             var html = String.Format("<html><head><title>{0}</title></head><body><h1>{1}</h1></body></html>", title, message);
 240             var outBuffer = Encoding.UTF8.GetBytes(html);
 241             response.ContentLength64 = outBuffer.Length;
 242             using (var stream = response.OutputStream)
 243             {
 244                 stream.Write(outBuffer, 0, outBuffer.Length);
 245             }
 246
 247             Log.InfoFormat("[RETRIEVE] Responded");
 248         }
 249
 250         private static void Respond(Stream stream,string title,string message)
 251         {
 252
 253             var html = String.Format("<html><head><title>{0}</title></head><body><h1>{1}</h1></body></html>", title, message);
 254
 255             var response = new StringBuilder();
 256             response.AppendLine("HTTP/1.1 200 OK");
 257             response.AppendFormat("Content-Length: {0}\n", html.Length);
 258             response.AppendLine("Server: Microsoft-HTTPAPI/2.0");
 259             response.AppendFormat("Date: {0}\n\n", DateTime.UtcNow);
 260             response.AppendLine(html);
 261
 262             var outBuffer=Encoding.UTF8.GetBytes(response.ToString());
 263
 264             stream.Write(outBuffer, 0, outBuffer.Length);
 265
 266             Log.InfoFormat("[RETRIEVE] Responded");
 267         }
 268
 269
 270         /// <summary>
 271         /// Locates a free local port
 272         /// </summary>
 273         /// <returns>A free port</returns>
 274         /// <remarks>The method starts and stops a TcpListener on port 0 to locate a free port.</remarks>
 275         public static int GetFreePort()
 276         {
 277             //The TcpListener will locate a free port
 278             var listener = new TcpListener(IPAddress.Any, 0);
 279             listener.Start();
 280             var port = ((IPEndPoint)listener.LocalEndpoint).Port;
 281             listener.Stop();
 282             return port;
 283         }
 284     }
 285 }