root / trunk / Pithos.Interfaces / ObjectInfo.cs @ 43dd02a8
History | View | Annotate | Download (12.8 kB)
1 |
#region |
---|---|
2 |
/* ----------------------------------------------------------------------- |
3 |
* <copyright file="ObjectInfo.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 |
using System; |
43 |
using System.Collections.Generic; |
44 |
using System.Diagnostics; |
45 |
using System.Diagnostics.Contracts; |
46 |
using System.Dynamic; |
47 |
using System.Globalization; |
48 |
using System.IO; |
49 |
using System.Linq; |
50 |
using System.Text; |
51 |
using Newtonsoft.Json; |
52 |
|
53 |
namespace Pithos.Interfaces |
54 |
{ |
55 |
[DebuggerDisplay("Name {Name}")] |
56 |
public class ObjectInfo//:DynamicObject |
57 |
{ |
58 |
private readonly List<string> _knownContainers= new List<string>{"trash"}; |
59 |
public string Name { get; set; } |
60 |
|
61 |
public string ETag { get; set; } |
62 |
|
63 |
public string Hash { get; set; } |
64 |
|
65 |
public string X_Object_Hash { get { return Hash; } set { Hash = value; } } |
66 |
|
67 |
[JsonProperty("x_object_uuid")] |
68 |
public string UUID { get; set; } |
69 |
|
70 |
public long Bytes { get; set; } |
71 |
public string Content_Type { get; set; } |
72 |
public DateTime Last_Modified { get; set; } |
73 |
|
74 |
private Dictionary<string, string> _tags=new Dictionary<string, string>(); |
75 |
public Dictionary<string, string> Tags |
76 |
{ |
77 |
get { return _tags; } |
78 |
set { _tags = value; } |
79 |
} |
80 |
|
81 |
private Dictionary<string, string> _extensions=new Dictionary<string, string>(); |
82 |
public Dictionary<string, string> Extensions |
83 |
{ |
84 |
get { return _extensions; } |
85 |
set |
86 |
{ |
87 |
_extensions = value; |
88 |
ExtractKnownExtensions(); |
89 |
} |
90 |
} |
91 |
|
92 |
|
93 |
private Dictionary<string, string> _permissions=new Dictionary<string, string>(); |
94 |
[JsonProperty("x_object_sharing")] |
95 |
[JsonConverter(typeof(PermissionConverter))] |
96 |
public Dictionary<string, string> Permissions |
97 |
{ |
98 |
get { return _permissions; } |
99 |
set |
100 |
{ |
101 |
_permissions = value; |
102 |
} |
103 |
} |
104 |
|
105 |
/// <summary> |
106 |
/// Version number |
107 |
/// </summary> |
108 |
[JsonProperty("x_object_version")] |
109 |
public long? Version { get; set; } |
110 |
|
111 |
|
112 |
/// <summary> |
113 |
/// Shared object permissions can be Read or Write |
114 |
/// </summary> |
115 |
[JsonProperty("x_object_allowed_to")] |
116 |
public string AllowedTo { get; set; } |
117 |
|
118 |
|
119 |
/// <summary> |
120 |
/// Version timestamp |
121 |
/// </summary> |
122 |
[JsonProperty("X_Object_Version_Timestamp"), JsonConverter(typeof(PithosDateTimeConverter))] |
123 |
public DateTime? VersionTimestamp { get; set; } |
124 |
|
125 |
[JsonProperty("X_Object_Modified_By")] |
126 |
public string ModifiedBy { get; set; } |
127 |
|
128 |
|
129 |
public Stream Stream { get; set; } |
130 |
|
131 |
|
132 |
public Uri StorageUri { get; set; } |
133 |
|
134 |
public string Account { get; set; } |
135 |
|
136 |
public string Container { get; set; } |
137 |
|
138 |
public Uri Uri |
139 |
{ |
140 |
get |
141 |
{ |
142 |
var relativeUrl=String.Format("{0}/{1}/{2}",Account, Container,Name); |
143 |
return StorageUri==null |
144 |
? new Uri(relativeUrl,UriKind.Relative) |
145 |
: new Uri(StorageUri, relativeUrl); |
146 |
} |
147 |
} |
148 |
|
149 |
public string ContendDisposition { get; set; } |
150 |
|
151 |
public string ContentEncoding { get; set; } |
152 |
|
153 |
public string Manifest { get; set; } |
154 |
|
155 |
public bool IsPublic |
156 |
{ |
157 |
get { return !String.IsNullOrWhiteSpace(PublicUrl); } |
158 |
set |
159 |
{ |
160 |
if (!value) |
161 |
PublicUrl = null; |
162 |
else if (String.IsNullOrWhiteSpace(PublicUrl)) |
163 |
PublicUrl="true"; |
164 |
} |
165 |
} |
166 |
|
167 |
[JsonProperty("X_Object_Public")] |
168 |
public string PublicUrl { get; set; } |
169 |
|
170 |
public string PreviousHash { get; set; } |
171 |
|
172 |
public ObjectInfo() |
173 |
{} |
174 |
|
175 |
public ObjectInfo(string accountPath,string accountName,FileSystemInfo fileInfo) |
176 |
{ |
177 |
if (String.IsNullOrWhiteSpace(accountPath)) |
178 |
throw new ArgumentNullException("accountPath"); |
179 |
if (string.IsNullOrWhiteSpace(accountName)) |
180 |
throw new ArgumentNullException("accountName"); |
181 |
if (fileInfo == null) |
182 |
throw new ArgumentNullException("fileInfo"); |
183 |
Contract.EndContractBlock(); |
184 |
|
185 |
var relativeUrl = fileInfo.WithProperCapitalization().AsRelativeUrlTo(accountPath); |
186 |
//The first part of the URL is the container |
187 |
var slashIndex = relativeUrl.IndexOf('/'); |
188 |
var container = relativeUrl.Substring(0, slashIndex); |
189 |
//The second is the file's url relative to the container |
190 |
var fileUrl = relativeUrl.Substring(slashIndex + 1); |
191 |
|
192 |
Account = accountName; |
193 |
Container = container; |
194 |
Name = fileUrl; |
195 |
} |
196 |
|
197 |
|
198 |
private void ExtractKnownExtensions() |
199 |
{ |
200 |
Version=GetLong(KnownExtensions.X_Object_Version); |
201 |
VersionTimestamp = GetTimestamp(KnownExtensions.X_Object_Version_Timestamp); |
202 |
ModifiedBy = GetString(KnownExtensions.X_Object_Modified_By); |
203 |
} |
204 |
|
205 |
private string GetString(string name) |
206 |
{ |
207 |
string value; |
208 |
_extensions.TryGetValue(name, out value); |
209 |
return value ; |
210 |
} |
211 |
|
212 |
private long? GetLong(string name) |
213 |
{ |
214 |
string version; |
215 |
long value; |
216 |
return _extensions.TryGetValue(name, out version) && long.TryParse(version, out value) |
217 |
? (long?) value |
218 |
: null; |
219 |
} |
220 |
|
221 |
private DateTime? GetTimestamp(string name) |
222 |
{ |
223 |
string version; |
224 |
DateTime value; |
225 |
if (_extensions.TryGetValue(name, out version) && |
226 |
DateTime.TryParse(version,CultureInfo.InvariantCulture,DateTimeStyles.AdjustToUniversal, out value)) |
227 |
{ |
228 |
return value; |
229 |
} |
230 |
return null; |
231 |
} |
232 |
|
233 |
|
234 |
public static ObjectInfo Empty = new ObjectInfo |
235 |
{ |
236 |
Name = String.Empty, |
237 |
Hash = String.Empty, |
238 |
Bytes = 0, |
239 |
Content_Type = String.Empty, |
240 |
Last_Modified = DateTime.MinValue, |
241 |
Exists=false |
242 |
}; |
243 |
|
244 |
private bool _exists=true; |
245 |
|
246 |
public bool Exists |
247 |
{ |
248 |
get { |
249 |
return _exists; |
250 |
} |
251 |
set { |
252 |
_exists = value; |
253 |
} |
254 |
} |
255 |
|
256 |
|
257 |
public string RelativeUrlToFilePath(string currentAccount) |
258 |
{ |
259 |
if (Name==null) |
260 |
throw new InvalidOperationException("Name can't be null"); |
261 |
if (String.IsNullOrWhiteSpace(currentAccount)) |
262 |
throw new ArgumentNullException("currentAccount"); |
263 |
Contract.EndContractBlock(); |
264 |
|
265 |
if (this == Empty) |
266 |
return String.Empty; |
267 |
|
268 |
var unescaped = Uri.UnescapeDataString(Name); |
269 |
var path = unescaped.Replace("/", "\\"); |
270 |
var pathParts=new Stack<string>(); |
271 |
pathParts.Push(path); |
272 |
if (!String.IsNullOrWhiteSpace(Container) && !_knownContainers.Contains(Container)) |
273 |
pathParts.Push(Container); |
274 |
if (!currentAccount.Equals(Account, StringComparison.InvariantCultureIgnoreCase)) |
275 |
{ |
276 |
if (Account != null) |
277 |
{ |
278 |
pathParts.Push(Account); |
279 |
pathParts.Push(FolderConstants.OthersFolder); |
280 |
} |
281 |
} |
282 |
var finalPath=Path.Combine(pathParts.ToArray()); |
283 |
return finalPath; |
284 |
} |
285 |
|
286 |
/* |
287 |
public override bool TrySetMember(SetMemberBinder binder, object value) |
288 |
{ |
289 |
if (binder.Name.StartsWith("x_object_meta")) |
290 |
{ |
291 |
Tags[binder.Name] = value.ToString(); |
292 |
} |
293 |
return false; |
294 |
} |
295 |
*/ |
296 |
|
297 |
public string GetPermissionString() |
298 |
{ |
299 |
if (Permissions==null) |
300 |
throw new InvalidOperationException(); |
301 |
Contract.EndContractBlock(); |
302 |
|
303 |
if (Permissions.Count == 0) |
304 |
return "~"; |
305 |
var permissionBuilder = new StringBuilder(); |
306 |
var groupings = Permissions.GroupBy(pair => pair.Value.Trim(), pair => pair.Key.Trim()); |
307 |
foreach (var grouping in groupings) |
308 |
{ |
309 |
permissionBuilder.AppendFormat("{0}={1};", grouping.Key, String.Join(",", grouping)); |
310 |
} |
311 |
var permissions = Uri.EscapeDataString(permissionBuilder.ToString().Trim(';')); |
312 |
return permissions; |
313 |
} |
314 |
|
315 |
public void SetPermissions(string permissions) |
316 |
{ |
317 |
if (String.IsNullOrWhiteSpace(permissions)) |
318 |
return; |
319 |
|
320 |
Permissions = PermissionConverter.ParsePermissions(permissions); |
321 |
} |
322 |
|
323 |
//The previous values that correspond to a NoModification object |
324 |
//have the same account, container and possibly the same folder |
325 |
public bool CorrespondsTo(ObjectInfo other) |
326 |
{ |
327 |
return other.Account == this.Account |
328 |
&& other.Container == this.Container |
329 |
&& (this.Name == null || other.Name.StartsWith(this.Name)); |
330 |
} |
331 |
|
332 |
public bool IsWritable(string account) |
333 |
{ |
334 |
//If the Allowed To header has no value, try to determine the Share permissions |
335 |
if (AllowedTo == null) |
336 |
{ |
337 |
//If this file has no permissions defined, we can probably write it |
338 |
//This case should occur only when the info comes from a listing of the user's own files |
339 |
if (Permissions == null || Permissions.Count == 0) |
340 |
return true; |
341 |
string perms; |
342 |
|
343 |
//Do we have an explicit write share to this account? |
344 |
return Permissions.TryGetValue(account, out perms) |
345 |
&& perms.Equals("write",StringComparison.InvariantCultureIgnoreCase); |
346 |
|
347 |
} |
348 |
//Otherwise return the permissions specified by AllowedTo |
349 |
return AllowedTo.Equals("write",StringComparison.InvariantCultureIgnoreCase) ; |
350 |
} |
351 |
|
352 |
public ObjectInfo Previous { get; private set; } |
353 |
|
354 |
public bool IsDirectory |
355 |
{ |
356 |
get |
357 |
{ |
358 |
if (Content_Type == null) |
359 |
return false; |
360 |
if (Content_Type.StartsWith(@"application/directory",StringComparison.InvariantCultureIgnoreCase)) |
361 |
return true; |
362 |
if (Content_Type.StartsWith(@"application/folder",StringComparison.InvariantCultureIgnoreCase)) |
363 |
return true; |
364 |
return false; |
365 |
} |
366 |
} |
367 |
|
368 |
public Uri AccountKey |
369 |
{ |
370 |
get { return new Uri(StorageUri,"../" + Account); } |
371 |
} |
372 |
|
373 |
public ObjectInfo SetPrevious(ObjectInfo previous) |
374 |
{ |
375 |
Previous = previous; |
376 |
PreviousHash = previous.Hash; |
377 |
return this; |
378 |
} |
379 |
|
380 |
public bool? IsShared |
381 |
{ |
382 |
get |
383 |
{ |
384 |
if (Uri == null || StorageUri == null) |
385 |
return null; |
386 |
var isShared = !Uri.ToString().StartsWith(StorageUri.ToString()); |
387 |
return isShared; |
388 |
} |
389 |
} |
390 |
} |
391 |
} |