root / trunk / Pithos.Client.WPF / PithosAccount.cs @ 7c4a9354
History | View | Annotate | Download (9.6 kB)
1 |
// ----------------------------------------------------------------------- |
---|---|
2 |
// <copyright file="PithosAccount.cs" company="GRNet"> |
3 |
// Copyright 2011 GRNET S.A. All rights reserved. |
4 |
// |
5 |
// Redistribution and use in source and binary forms, with or |
6 |
// without modification, are permitted provided that the following |
7 |
// conditions are met: |
8 |
// |
9 |
// 1. Redistributions of source code must retain the above |
10 |
// copyright notice, this list of conditions and the following |
11 |
// disclaimer. |
12 |
// |
13 |
// 2. Redistributions in binary form must reproduce the above |
14 |
// copyright notice, this list of conditions and the following |
15 |
// disclaimer in the documentation and/or other materials |
16 |
// provided with the distribution. |
17 |
// |
18 |
// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS |
19 |
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
20 |
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
21 |
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR |
22 |
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
23 |
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
24 |
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
25 |
// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
26 |
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 |
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
28 |
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 |
// POSSIBILITY OF SUCH DAMAGE. |
30 |
// |
31 |
// The views and conclusions contained in the software and |
32 |
// documentation are those of the authors and should not be |
33 |
// interpreted as representing official policies, either expressed |
34 |
// or implied, of GRNET S.A. |
35 |
|
36 |
// </copyright> |
37 |
// ----------------------------------------------------------------------- |
38 |
|
39 |
using System.IO; |
40 |
using Pithos.Network; |
41 |
using log4net; |
42 |
|
43 |
namespace Pithos.Client.WPF |
44 |
{ |
45 |
using System; |
46 |
using System.Collections.Generic; |
47 |
using System.Linq; |
48 |
using System.Text; |
49 |
using System.Net; |
50 |
using System.Threading.Tasks; |
51 |
using System.Diagnostics.Contracts; |
52 |
using System.Diagnostics; |
53 |
using System.Net.Sockets; |
54 |
|
55 |
/// <summary> |
56 |
/// TODO: Update summary. |
57 |
/// </summary> |
58 |
/// <summary> |
59 |
/// Retrieves an account name and token from PITHOS |
60 |
/// </summary> |
61 |
public static class PithosAccount |
62 |
{ |
63 |
private static readonly ILog Log = LogManager.GetLogger(typeof(PithosAccount)); |
64 |
|
65 |
/// <summary> |
66 |
/// Asynchronously retrieves PITHOS credentials |
67 |
/// </summary> |
68 |
/// <param name="loginUrl">URL to retrieve the account info from PITHOS. Must end with =</param> |
69 |
/// <returns>The credentials wrapped in a Task</returns> |
70 |
public static Task<NetworkCredential> RetrieveCredentials(string loginUrl) |
71 |
{ |
72 |
Contract.Requires(Uri.IsWellFormedUriString(loginUrl, UriKind.Absolute)); |
73 |
|
74 |
if (!Uri.IsWellFormedUriString(loginUrl, UriKind.Absolute)) |
75 |
throw new ArgumentException("The pithosSite parameter must be a valid absolute URL", "loginUrl"); |
76 |
|
77 |
int port = GetFreePort(); |
78 |
|
79 |
|
80 |
var listenerUrl = String.Format("http://127.0.0.1:{0}/", port); |
81 |
|
82 |
|
83 |
|
84 |
var receiveCredentials = ListenForRedirectAsync(port); |
85 |
|
86 |
var uriBuilder=new UriBuilder(loginUrl); |
87 |
uriBuilder.Query="next=" + listenerUrl; |
88 |
|
89 |
var retrieveUri = uriBuilder.Uri; |
90 |
Log.InfoFormat("[RETRIEVE] Open Browser at {0}", retrieveUri); |
91 |
Process.Start(retrieveUri.ToString()); |
92 |
|
93 |
return receiveCredentials; |
94 |
} |
95 |
|
96 |
private static async Task<NetworkCredential> ListenHttpForRedirectAsync(string listenerUrl) |
97 |
{ |
98 |
using (var listener = new HttpListener()) |
99 |
{ |
100 |
listener.Prefixes.Add(listenerUrl); |
101 |
|
102 |
Log.InfoFormat("[RETRIEVE] Listening at {0}", listenerUrl); |
103 |
|
104 |
|
105 |
try |
106 |
{ |
107 |
listener.Start(); |
108 |
|
109 |
var context = await listener.GetContextAsync() |
110 |
.WithTimeout(TimeSpan.FromMinutes(5)); |
111 |
|
112 |
var request = context.Request; |
113 |
Log.InfoFormat("[RETRIEVE] Got Connection {0}", request.RawUrl); |
114 |
|
115 |
var query = request.QueryString; |
116 |
var userName = query["user"]; |
117 |
var token = query["token"]; |
118 |
if (String.IsNullOrWhiteSpace(userName) || |
119 |
String.IsNullOrWhiteSpace(token)) |
120 |
{ |
121 |
Respond(context, "Failure", "The server did not return a username or token"); |
122 |
Log.ErrorFormat("[RETRIEVE] No credentials returned by server"); |
123 |
throw new Exception("The server did not return a username or token"); |
124 |
} |
125 |
else |
126 |
{ |
127 |
Log.InfoFormat("[RETRIEVE] Credentials retrieved user:{0} token:{1}", userName, token); |
128 |
Respond(context, "Authenticated", "Got It"); |
129 |
|
130 |
return new NetworkCredential(userName, token); |
131 |
} |
132 |
} |
133 |
catch (Exception exc) |
134 |
{ |
135 |
Log.Error("[RETRIEVE][ERROR] Receive connection {0}", exc); |
136 |
throw; |
137 |
} |
138 |
} |
139 |
} |
140 |
|
141 |
private static async Task<NetworkCredential> ListenForRedirectAsync(int port) |
142 |
{ |
143 |
var listener = new TcpListener(IPAddress.Any, port); |
144 |
Log.InfoFormat("[RETRIEVE] Listening at {0}", port); |
145 |
|
146 |
try |
147 |
{ |
148 |
listener.Start(); |
149 |
|
150 |
using (var client = await listener.AcceptTcpClientAsync() |
151 |
.WithTimeout(TimeSpan.FromMinutes(5))) |
152 |
{ |
153 |
|
154 |
using (var stream = client.GetStream()) |
155 |
using (var reader=new StreamReader(stream)) |
156 |
{ |
157 |
var request = await reader.ReadLineAsync(); |
158 |
if (request == null) |
159 |
throw new Exception("Nothing retrieved"); |
160 |
Log.InfoFormat("[RETRIEVE] Got Connection {0}", request); |
161 |
|
162 |
|
163 |
var parts=request.Split(' '); |
164 |
var query = parts[1].TrimStart('/','?'); |
165 |
|
166 |
var items = query.Split('&') |
167 |
.Select(pair => pair.Split('=')) |
168 |
.ToDictionary(arr => arr[0].ToLower(), arr => Uri.UnescapeDataString(arr[1])); |
169 |
|
170 |
var userName = items["user"]; |
171 |
var token = items["token"]; |
172 |
if (String.IsNullOrWhiteSpace(userName) || |
173 |
String.IsNullOrWhiteSpace(token)) |
174 |
{ |
175 |
Respond(stream, "Failure", "The server did not return a username or token"); |
176 |
Log.ErrorFormat("[RETRIEVE] No credentials returned by server"); |
177 |
throw new Exception("The server did not return a username or token"); |
178 |
} |
179 |
else |
180 |
{ |
181 |
Log.InfoFormat("[RETRIEVE] Credentials retrieved user:{0} token:{1}", userName, token); |
182 |
Respond(stream, "Authenticated", "Got It"); |
183 |
} |
184 |
return new NetworkCredential(userName, token); |
185 |
} |
186 |
} |
187 |
} |
188 |
catch (Exception exc) |
189 |
{ |
190 |
Log.Error("[RETRIEVE][ERROR] Receive connection {0}", exc); |
191 |
throw; |
192 |
} |
193 |
} |
194 |
|
195 |
|
196 |
|
197 |
private static void Respond(HttpListenerContext context,string title,string message) |
198 |
{ |
199 |
var response = context.Response; |
200 |
var html = String.Format("<html><head><title>{0}</title></head><body><h1>{1}</h1></body></html>", title, message); |
201 |
var outBuffer = Encoding.UTF8.GetBytes(html); |
202 |
response.ContentLength64 = outBuffer.Length; |
203 |
using (var stream = response.OutputStream) |
204 |
{ |
205 |
stream.Write(outBuffer, 0, outBuffer.Length); |
206 |
} |
207 |
|
208 |
Log.InfoFormat("[RETRIEVE] Responded"); |
209 |
} |
210 |
|
211 |
private static void Respond(Stream stream,string title,string message) |
212 |
{ |
213 |
|
214 |
var html = String.Format("<html><head><title>{0}</title></head><body><h1>{1}</h1></body></html>", title, message); |
215 |
|
216 |
var response = new StringBuilder(); |
217 |
response.AppendLine("HTTP/1.1 200 OK"); |
218 |
response.AppendFormat("Content-Length: {0}\n", html.Length); |
219 |
response.AppendLine("Server: Microsoft-HTTPAPI/2.0"); |
220 |
response.AppendFormat("Date: {0}\n\n", DateTime.UtcNow); |
221 |
response.AppendLine(html); |
222 |
|
223 |
var outBuffer=Encoding.UTF8.GetBytes(response.ToString()); |
224 |
|
225 |
stream.Write(outBuffer, 0, outBuffer.Length); |
226 |
|
227 |
Log.InfoFormat("[RETRIEVE] Responded"); |
228 |
} |
229 |
|
230 |
|
231 |
/// <summary> |
232 |
/// Locates a free local port |
233 |
/// </summary> |
234 |
/// <returns>A free port</returns> |
235 |
/// <remarks>The method starts and stops a TcpListener on port 0 to locate a free port.</remarks> |
236 |
public static int GetFreePort() |
237 |
{ |
238 |
//The TcpListener will locate a free port |
239 |
var listener = new TcpListener(IPAddress.Any, 0); |
240 |
listener.Start(); |
241 |
var port = ((IPEndPoint)listener.LocalEndpoint).Port; |
242 |
listener.Stop(); |
243 |
return port; |
244 |
} |
245 |
} |
246 |
} |