root / trunk / Pithos.Network / RestClient.cs @ 275a059e
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1 | 255f5f86 | Panagiotis Kanavos | #region |
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2 | 255f5f86 | Panagiotis Kanavos | /* ----------------------------------------------------------------------- |
3 | 255f5f86 | Panagiotis Kanavos | * <copyright file="RestClient.cs" company="GRNet"> |
4 | 255f5f86 | Panagiotis Kanavos | * |
5 | 255f5f86 | Panagiotis Kanavos | * Copyright 2011-2012 GRNET S.A. All rights reserved. |
6 | 255f5f86 | Panagiotis Kanavos | * |
7 | 255f5f86 | Panagiotis Kanavos | * Redistribution and use in source and binary forms, with or |
8 | 255f5f86 | Panagiotis Kanavos | * without modification, are permitted provided that the following |
9 | 255f5f86 | Panagiotis Kanavos | * conditions are met: |
10 | 255f5f86 | Panagiotis Kanavos | * |
11 | 255f5f86 | Panagiotis Kanavos | * 1. Redistributions of source code must retain the above |
12 | 255f5f86 | Panagiotis Kanavos | * copyright notice, this list of conditions and the following |
13 | 255f5f86 | Panagiotis Kanavos | * disclaimer. |
14 | 255f5f86 | Panagiotis Kanavos | * |
15 | 255f5f86 | Panagiotis Kanavos | * 2. Redistributions in binary form must reproduce the above |
16 | 255f5f86 | Panagiotis Kanavos | * copyright notice, this list of conditions and the following |
17 | 255f5f86 | Panagiotis Kanavos | * disclaimer in the documentation and/or other materials |
18 | 255f5f86 | Panagiotis Kanavos | * provided with the distribution. |
19 | 255f5f86 | Panagiotis Kanavos | * |
20 | 255f5f86 | Panagiotis Kanavos | * |
21 | 255f5f86 | Panagiotis Kanavos | * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS |
22 | 255f5f86 | Panagiotis Kanavos | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
23 | 255f5f86 | Panagiotis Kanavos | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
24 | 255f5f86 | Panagiotis Kanavos | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR |
25 | 255f5f86 | Panagiotis Kanavos | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
26 | 255f5f86 | Panagiotis Kanavos | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
27 | 255f5f86 | Panagiotis Kanavos | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
28 | 255f5f86 | Panagiotis Kanavos | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
29 | 255f5f86 | Panagiotis Kanavos | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | 255f5f86 | Panagiotis Kanavos | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
31 | 255f5f86 | Panagiotis Kanavos | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
32 | 255f5f86 | Panagiotis Kanavos | * POSSIBILITY OF SUCH DAMAGE. |
33 | 255f5f86 | Panagiotis Kanavos | * |
34 | 255f5f86 | Panagiotis Kanavos | * The views and conclusions contained in the software and |
35 | 255f5f86 | Panagiotis Kanavos | * documentation are those of the authors and should not be |
36 | 255f5f86 | Panagiotis Kanavos | * interpreted as representing official policies, either expressed |
37 | 255f5f86 | Panagiotis Kanavos | * or implied, of GRNET S.A. |
38 | 255f5f86 | Panagiotis Kanavos | * </copyright> |
39 | 255f5f86 | Panagiotis Kanavos | * ----------------------------------------------------------------------- |
40 | 255f5f86 | Panagiotis Kanavos | */ |
41 | 255f5f86 | Panagiotis Kanavos | #endregion |
42 | 4d301e8e | Panagiotis Kanavos | using System.Collections.Specialized; |
43 | 4d301e8e | Panagiotis Kanavos | using System.Diagnostics; |
44 | 4d301e8e | Panagiotis Kanavos | using System.Diagnostics.Contracts; |
45 | 7d915c34 | Panagiotis Kanavos | using System.IO; |
46 | 4d301e8e | Panagiotis Kanavos | using System.Net; |
47 | db8a9589 | Panagiotis Kanavos | using System.Reflection; |
48 | 4d301e8e | Panagiotis Kanavos | using System.Runtime.Serialization; |
49 | 7d915c34 | Panagiotis Kanavos | using System.Threading.Tasks; |
50 | 5120f3cb | Panagiotis Kanavos | using log4net; |
51 | 4d301e8e | Panagiotis Kanavos | |
52 | 27361404 | Panagiotis Kanavos | |
53 | 4d301e8e | Panagiotis Kanavos | namespace Pithos.Network |
54 | 4d301e8e | Panagiotis Kanavos | { |
55 | 4d301e8e | Panagiotis Kanavos | using System; |
56 | 4d301e8e | Panagiotis Kanavos | using System.Collections.Generic; |
57 | 4d301e8e | Panagiotis Kanavos | using System.Linq; |
58 | 4d301e8e | Panagiotis Kanavos | using System.Text; |
59 | 4d301e8e | Panagiotis Kanavos | |
60 | 4d301e8e | Panagiotis Kanavos | /// <summary> |
61 | 4d301e8e | Panagiotis Kanavos | /// TODO: Update summary. |
62 | 4d301e8e | Panagiotis Kanavos | /// </summary> |
63 | 9c4346c9 | Panagiotis Kanavos | public class RestClient:WebClient |
64 | 4d301e8e | Panagiotis Kanavos | { |
65 | db8a9589 | Panagiotis Kanavos | private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); |
66 | db8a9589 | Panagiotis Kanavos | |
67 | 4d301e8e | Panagiotis Kanavos | public int Timeout { get; set; } |
68 | 4d301e8e | Panagiotis Kanavos | |
69 | 4d301e8e | Panagiotis Kanavos | public bool TimedOut { get; set; } |
70 | 4d301e8e | Panagiotis Kanavos | |
71 | 4d301e8e | Panagiotis Kanavos | public HttpStatusCode StatusCode { get; private set; } |
72 | 4d301e8e | Panagiotis Kanavos | |
73 | 4d301e8e | Panagiotis Kanavos | public string StatusDescription { get; set; } |
74 | 4d301e8e | Panagiotis Kanavos | |
75 | a27aa447 | Panagiotis Kanavos | public long? RangeFrom { get; set; } |
76 | a27aa447 | Panagiotis Kanavos | public long? RangeTo { get; set; } |
77 | 4d301e8e | Panagiotis Kanavos | |
78 | 4d301e8e | Panagiotis Kanavos | public int Retries { get; set; } |
79 | 4d301e8e | Panagiotis Kanavos | |
80 | 4d301e8e | Panagiotis Kanavos | private readonly Dictionary<string, string> _parameters=new Dictionary<string, string>(); |
81 | 4d301e8e | Panagiotis Kanavos | public Dictionary<string, string> Parameters |
82 | 4d301e8e | Panagiotis Kanavos | { |
83 | cfed7823 | Panagiotis Kanavos | get |
84 | cfed7823 | Panagiotis Kanavos | { |
85 | cfed7823 | Panagiotis Kanavos | Contract.Ensures(_parameters!=null); |
86 | cfed7823 | Panagiotis Kanavos | return _parameters; |
87 | cfed7823 | Panagiotis Kanavos | } |
88 | cfed7823 | Panagiotis Kanavos | } |
89 | cfed7823 | Panagiotis Kanavos | |
90 | 5120f3cb | Panagiotis Kanavos | |
91 | cfed7823 | Panagiotis Kanavos | [ContractInvariantMethod] |
92 | cfed7823 | Panagiotis Kanavos | private void Invariants() |
93 | cfed7823 | Panagiotis Kanavos | { |
94 | cfed7823 | Panagiotis Kanavos | Contract.Invariant(Headers!=null); |
95 | 4d301e8e | Panagiotis Kanavos | } |
96 | 4d301e8e | Panagiotis Kanavos | |
97 | 9c4346c9 | Panagiotis Kanavos | public RestClient():base() |
98 | 4d301e8e | Panagiotis Kanavos | { |
99 | 4d301e8e | Panagiotis Kanavos | |
100 | 4d301e8e | Panagiotis Kanavos | } |
101 | 4d301e8e | Panagiotis Kanavos | |
102 | d15e99b4 | Panagiotis Kanavos | |
103 | 9c4346c9 | Panagiotis Kanavos | public RestClient(RestClient other) |
104 | 4d301e8e | Panagiotis Kanavos | : base() |
105 | 4d301e8e | Panagiotis Kanavos | { |
106 | cfed7823 | Panagiotis Kanavos | if (other==null) |
107 | cfed7823 | Panagiotis Kanavos | throw new ArgumentNullException("other"); |
108 | cfed7823 | Panagiotis Kanavos | Contract.EndContractBlock(); |
109 | cfed7823 | Panagiotis Kanavos | |
110 | 4d301e8e | Panagiotis Kanavos | CopyHeaders(other); |
111 | 4d301e8e | Panagiotis Kanavos | Timeout = other.Timeout; |
112 | 4d301e8e | Panagiotis Kanavos | Retries = other.Retries; |
113 | 82db721b | Panagiotis Kanavos | BaseAddress = other.BaseAddress; |
114 | 4d301e8e | Panagiotis Kanavos | |
115 | 4d301e8e | Panagiotis Kanavos | foreach (var parameter in other.Parameters) |
116 | 4d301e8e | Panagiotis Kanavos | { |
117 | 4d301e8e | Panagiotis Kanavos | Parameters.Add(parameter.Key,parameter.Value); |
118 | 4d301e8e | Panagiotis Kanavos | } |
119 | 4d301e8e | Panagiotis Kanavos | |
120 | 4d301e8e | Panagiotis Kanavos | this.Proxy = other.Proxy; |
121 | 4d301e8e | Panagiotis Kanavos | } |
122 | 4d301e8e | Panagiotis Kanavos | |
123 | 06f11e8b | Panagiotis Kanavos | |
124 | 4d301e8e | Panagiotis Kanavos | protected override WebRequest GetWebRequest(Uri address) |
125 | 4d301e8e | Panagiotis Kanavos | { |
126 | 4d301e8e | Panagiotis Kanavos | TimedOut = false; |
127 | 06f11e8b | Panagiotis Kanavos | var webRequest = base.GetWebRequest(address); |
128 | cfed7823 | Panagiotis Kanavos | var request = (HttpWebRequest)webRequest; |
129 | 65282d58 | Panagiotis Kanavos | request.ServicePoint.ConnectionLimit = 50; |
130 | 5d4e820b | Panagiotis Kanavos | if (IfModifiedSince.HasValue) |
131 | 5d4e820b | Panagiotis Kanavos | request.IfModifiedSince = IfModifiedSince.Value; |
132 | 4d301e8e | Panagiotis Kanavos | request.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip; |
133 | 4d301e8e | Panagiotis Kanavos | if(Timeout>0) |
134 | 4d301e8e | Panagiotis Kanavos | request.Timeout = Timeout; |
135 | a27aa447 | Panagiotis Kanavos | |
136 | a27aa447 | Panagiotis Kanavos | if (RangeFrom.HasValue) |
137 | a27aa447 | Panagiotis Kanavos | { |
138 | a27aa447 | Panagiotis Kanavos | if (RangeTo.HasValue) |
139 | a27aa447 | Panagiotis Kanavos | request.AddRange(RangeFrom.Value, RangeTo.Value); |
140 | a27aa447 | Panagiotis Kanavos | else |
141 | a27aa447 | Panagiotis Kanavos | request.AddRange(RangeFrom.Value); |
142 | a27aa447 | Panagiotis Kanavos | } |
143 | 4d301e8e | Panagiotis Kanavos | return request; |
144 | 4d301e8e | Panagiotis Kanavos | } |
145 | 4d301e8e | Panagiotis Kanavos | |
146 | 5d4e820b | Panagiotis Kanavos | public DateTime? IfModifiedSince { get; set; } |
147 | 5d4e820b | Panagiotis Kanavos | |
148 | 06f11e8b | Panagiotis Kanavos | //Asynchronous version |
149 | 4d301e8e | Panagiotis Kanavos | protected override WebResponse GetWebResponse(WebRequest request, IAsyncResult result) |
150 | 6bcdd8e2 | Panagiotis Kanavos | { |
151 | 6bcdd8e2 | Panagiotis Kanavos | Log.InfoFormat("[{0}] {1}", request.Method, request.RequestUri); |
152 | 06f11e8b | Panagiotis Kanavos | HttpWebResponse response = null; |
153 | 06f11e8b | Panagiotis Kanavos | |
154 | 06f11e8b | Panagiotis Kanavos | try |
155 | 06f11e8b | Panagiotis Kanavos | { |
156 | 06f11e8b | Panagiotis Kanavos | response = (HttpWebResponse)base.GetWebResponse(request, result); |
157 | 06f11e8b | Panagiotis Kanavos | } |
158 | 06f11e8b | Panagiotis Kanavos | catch (WebException exc) |
159 | 06f11e8b | Panagiotis Kanavos | { |
160 | 6bcdd8e2 | Panagiotis Kanavos | Log.WarnFormat("[{0}] {1} {2}", request.Method, exc.Status, request.RequestUri); |
161 | 06f11e8b | Panagiotis Kanavos | if (!TryGetResponse(exc, out response)) |
162 | 06f11e8b | Panagiotis Kanavos | throw; |
163 | 06f11e8b | Panagiotis Kanavos | } |
164 | 06f11e8b | Panagiotis Kanavos | |
165 | 06f11e8b | Panagiotis Kanavos | StatusCode = response.StatusCode; |
166 | 06f11e8b | Panagiotis Kanavos | LastModified = response.LastModified; |
167 | 06f11e8b | Panagiotis Kanavos | StatusDescription = response.StatusDescription; |
168 | 06f11e8b | Panagiotis Kanavos | return response; |
169 | 4d301e8e | Panagiotis Kanavos | |
170 | cfed7823 | Panagiotis Kanavos | } |
171 | 06f11e8b | Panagiotis Kanavos | |
172 | 4d301e8e | Panagiotis Kanavos | |
173 | 06f11e8b | Panagiotis Kanavos | //Synchronous version |
174 | 06f11e8b | Panagiotis Kanavos | protected override WebResponse GetWebResponse(WebRequest request) |
175 | 4d301e8e | Panagiotis Kanavos | { |
176 | 06f11e8b | Panagiotis Kanavos | HttpWebResponse response = null; |
177 | 7d915c34 | Panagiotis Kanavos | try |
178 | 6bcdd8e2 | Panagiotis Kanavos | { |
179 | 6bcdd8e2 | Panagiotis Kanavos | Log.InfoFormat("[{0}] {1}",request.Method,request.RequestUri); |
180 | 06f11e8b | Panagiotis Kanavos | response = (HttpWebResponse)base.GetWebResponse(request); |
181 | 7d915c34 | Panagiotis Kanavos | } |
182 | 7d915c34 | Panagiotis Kanavos | catch (WebException exc) |
183 | 5120f3cb | Panagiotis Kanavos | { |
184 | 6bcdd8e2 | Panagiotis Kanavos | Log.WarnFormat("[{0}] {1} {2}", request.Method, exc.Status, request.RequestUri); |
185 | 06f11e8b | Panagiotis Kanavos | if (!TryGetResponse(exc, out response)) |
186 | 06f11e8b | Panagiotis Kanavos | throw; |
187 | 06f11e8b | Panagiotis Kanavos | } |
188 | 06f11e8b | Panagiotis Kanavos | |
189 | 06f11e8b | Panagiotis Kanavos | StatusCode = response.StatusCode; |
190 | 06f11e8b | Panagiotis Kanavos | LastModified = response.LastModified; |
191 | 06f11e8b | Panagiotis Kanavos | StatusDescription = response.StatusDescription; |
192 | 06f11e8b | Panagiotis Kanavos | return response; |
193 | 06f11e8b | Panagiotis Kanavos | } |
194 | 06f11e8b | Panagiotis Kanavos | |
195 | 06f11e8b | Panagiotis Kanavos | private bool TryGetResponse(WebException exc, out HttpWebResponse response) |
196 | 06f11e8b | Panagiotis Kanavos | { |
197 | 06f11e8b | Panagiotis Kanavos | response = null; |
198 | 06f11e8b | Panagiotis Kanavos | //Fail on empty response |
199 | 06f11e8b | Panagiotis Kanavos | if (exc.Response == null) |
200 | 06f11e8b | Panagiotis Kanavos | return false; |
201 | 06f11e8b | Panagiotis Kanavos | |
202 | 06f11e8b | Panagiotis Kanavos | response = (exc.Response as HttpWebResponse); |
203 | 06f11e8b | Panagiotis Kanavos | //Succeed on allowed status codes |
204 | 06f11e8b | Panagiotis Kanavos | if (AllowedStatusCodes.Contains(response.StatusCode)) |
205 | 06f11e8b | Panagiotis Kanavos | return true; |
206 | 06f11e8b | Panagiotis Kanavos | |
207 | 06f11e8b | Panagiotis Kanavos | //Does the response have any content to log? |
208 | 06f11e8b | Panagiotis Kanavos | if (exc.Response.ContentLength > 0) |
209 | 06f11e8b | Panagiotis Kanavos | { |
210 | 692ec33b | Panagiotis Kanavos | var content = LogContent(exc.Response); |
211 | 06f11e8b | Panagiotis Kanavos | Log.ErrorFormat(content); |
212 | 7d915c34 | Panagiotis Kanavos | } |
213 | 06f11e8b | Panagiotis Kanavos | return false; |
214 | 7d915c34 | Panagiotis Kanavos | } |
215 | 7d915c34 | Panagiotis Kanavos | |
216 | 06f11e8b | Panagiotis Kanavos | private readonly List<HttpStatusCode> _allowedStatusCodes=new List<HttpStatusCode>{HttpStatusCode.NotModified}; |
217 | 06f11e8b | Panagiotis Kanavos | |
218 | 5120f3cb | Panagiotis Kanavos | public List<HttpStatusCode> AllowedStatusCodes |
219 | 5120f3cb | Panagiotis Kanavos | { |
220 | 5120f3cb | Panagiotis Kanavos | get |
221 | 5120f3cb | Panagiotis Kanavos | { |
222 | 5120f3cb | Panagiotis Kanavos | return _allowedStatusCodes; |
223 | 5120f3cb | Panagiotis Kanavos | } |
224 | 5120f3cb | Panagiotis Kanavos | } |
225 | 5120f3cb | Panagiotis Kanavos | |
226 | bfc13ed8 | Panagiotis Kanavos | public DateTime LastModified { get; private set; } |
227 | bfc13ed8 | Panagiotis Kanavos | |
228 | 692ec33b | Panagiotis Kanavos | private static string LogContent(WebResponse webResponse) |
229 | 7d915c34 | Panagiotis Kanavos | { |
230 | cfed7823 | Panagiotis Kanavos | if (webResponse == null) |
231 | cfed7823 | Panagiotis Kanavos | throw new ArgumentNullException("webResponse"); |
232 | cfed7823 | Panagiotis Kanavos | Contract.EndContractBlock(); |
233 | cfed7823 | Panagiotis Kanavos | |
234 | 692ec33b | Panagiotis Kanavos | //The response stream must be copied to avoid affecting other code by disposing of the |
235 | 692ec33b | Panagiotis Kanavos | //original response stream. |
236 | 692ec33b | Panagiotis Kanavos | var stream = webResponse.GetResponseStream(); |
237 | 3c76f045 | Panagiotis Kanavos | using(var memStream=new MemoryStream()) |
238 | 692ec33b | Panagiotis Kanavos | using (var reader = new StreamReader(memStream)) |
239 | 7d915c34 | Panagiotis Kanavos | { |
240 | 692ec33b | Panagiotis Kanavos | stream.CopyTo(memStream); |
241 | 692ec33b | Panagiotis Kanavos | string content = reader.ReadToEnd(); |
242 | 692ec33b | Panagiotis Kanavos | |
243 | 692ec33b | Panagiotis Kanavos | stream.Seek(0,SeekOrigin.Begin); |
244 | 692ec33b | Panagiotis Kanavos | return content; |
245 | 7d915c34 | Panagiotis Kanavos | } |
246 | 4d301e8e | Panagiotis Kanavos | } |
247 | 4d301e8e | Panagiotis Kanavos | |
248 | 4d301e8e | Panagiotis Kanavos | public string DownloadStringWithRetry(string address,int retries=0) |
249 | 4d301e8e | Panagiotis Kanavos | { |
250 | 27361404 | Panagiotis Kanavos | |
251 | 4d301e8e | Panagiotis Kanavos | if (address == null) |
252 | 4d301e8e | Panagiotis Kanavos | throw new ArgumentNullException("address"); |
253 | 4d301e8e | Panagiotis Kanavos | |
254 | 4d301e8e | Panagiotis Kanavos | var actualAddress = GetActualAddress(address); |
255 | 4d301e8e | Panagiotis Kanavos | |
256 | 82db721b | Panagiotis Kanavos | TraceStart("GET",actualAddress); |
257 | 82db721b | Panagiotis Kanavos | |
258 | 4d301e8e | Panagiotis Kanavos | var actualRetries = (retries == 0) ? Retries : retries; |
259 | d15e99b4 | Panagiotis Kanavos | |
260 | 692ec33b | Panagiotis Kanavos | var uriString = String.Join("/", BaseAddress.TrimEnd('/'), actualAddress); |
261 | 692ec33b | Panagiotis Kanavos | |
262 | 7d915c34 | Panagiotis Kanavos | var task = Retry(() => |
263 | 692ec33b | Panagiotis Kanavos | { |
264 | 4d301e8e | Panagiotis Kanavos | var content = base.DownloadString(uriString); |
265 | 4d301e8e | Panagiotis Kanavos | |
266 | 4d301e8e | Panagiotis Kanavos | if (StatusCode == HttpStatusCode.NoContent) |
267 | 4d301e8e | Panagiotis Kanavos | return String.Empty; |
268 | 4d301e8e | Panagiotis Kanavos | return content; |
269 | 4d301e8e | Panagiotis Kanavos | |
270 | 4d301e8e | Panagiotis Kanavos | }, actualRetries); |
271 | 4d301e8e | Panagiotis Kanavos | |
272 | 65282d58 | Panagiotis Kanavos | try |
273 | 65282d58 | Panagiotis Kanavos | { |
274 | 65282d58 | Panagiotis Kanavos | var result = task.Result; |
275 | 65282d58 | Panagiotis Kanavos | return result; |
276 | 65282d58 | Panagiotis Kanavos | |
277 | 65282d58 | Panagiotis Kanavos | } |
278 | 65282d58 | Panagiotis Kanavos | catch (AggregateException exc) |
279 | 65282d58 | Panagiotis Kanavos | { |
280 | 65282d58 | Panagiotis Kanavos | //If the task fails, propagate the original exception |
281 | 65282d58 | Panagiotis Kanavos | if (exc.InnerException!=null) |
282 | 65282d58 | Panagiotis Kanavos | throw exc.InnerException; |
283 | 65282d58 | Panagiotis Kanavos | throw; |
284 | 65282d58 | Panagiotis Kanavos | } |
285 | 4d301e8e | Panagiotis Kanavos | } |
286 | 4d301e8e | Panagiotis Kanavos | |
287 | 4d301e8e | Panagiotis Kanavos | public void Head(string address,int retries=0) |
288 | 4d301e8e | Panagiotis Kanavos | { |
289 | cfed7823 | Panagiotis Kanavos | AllowedStatusCodes.Add(HttpStatusCode.NotFound); |
290 | 4d301e8e | Panagiotis Kanavos | RetryWithoutContent(address, retries, "HEAD"); |
291 | 4d301e8e | Panagiotis Kanavos | } |
292 | 4d301e8e | Panagiotis Kanavos | |
293 | 4d301e8e | Panagiotis Kanavos | public void PutWithRetry(string address, int retries = 0) |
294 | 4d301e8e | Panagiotis Kanavos | { |
295 | 4d301e8e | Panagiotis Kanavos | RetryWithoutContent(address, retries, "PUT"); |
296 | 4d301e8e | Panagiotis Kanavos | } |
297 | 4d301e8e | Panagiotis Kanavos | |
298 | 4d301e8e | Panagiotis Kanavos | public void DeleteWithRetry(string address,int retries=0) |
299 | 4d301e8e | Panagiotis Kanavos | { |
300 | 4d301e8e | Panagiotis Kanavos | RetryWithoutContent(address, retries, "DELETE"); |
301 | 4d301e8e | Panagiotis Kanavos | } |
302 | 4d301e8e | Panagiotis Kanavos | |
303 | aba9e6d9 | Panagiotis Kanavos | public string GetHeaderValue(string headerName,bool optional=false) |
304 | 4d301e8e | Panagiotis Kanavos | { |
305 | cfed7823 | Panagiotis Kanavos | if (this.ResponseHeaders==null) |
306 | cfed7823 | Panagiotis Kanavos | throw new InvalidOperationException("ResponseHeaders are null"); |
307 | cfed7823 | Panagiotis Kanavos | Contract.EndContractBlock(); |
308 | cfed7823 | Panagiotis Kanavos | |
309 | 4d301e8e | Panagiotis Kanavos | var values=this.ResponseHeaders.GetValues(headerName); |
310 | aba9e6d9 | Panagiotis Kanavos | if (values != null) |
311 | 4d301e8e | Panagiotis Kanavos | return values[0]; |
312 | aba9e6d9 | Panagiotis Kanavos | |
313 | aba9e6d9 | Panagiotis Kanavos | if (optional) |
314 | aba9e6d9 | Panagiotis Kanavos | return null; |
315 | aba9e6d9 | Panagiotis Kanavos | //A required header was not found |
316 | aba9e6d9 | Panagiotis Kanavos | throw new WebException(String.Format("The {0} header is missing", headerName)); |
317 | aba9e6d9 | Panagiotis Kanavos | } |
318 | aba9e6d9 | Panagiotis Kanavos | |
319 | aba9e6d9 | Panagiotis Kanavos | public void SetNonEmptyHeaderValue(string headerName, string value) |
320 | aba9e6d9 | Panagiotis Kanavos | { |
321 | aba9e6d9 | Panagiotis Kanavos | if (String.IsNullOrWhiteSpace(value)) |
322 | aba9e6d9 | Panagiotis Kanavos | return; |
323 | aba9e6d9 | Panagiotis Kanavos | Headers.Add(headerName,value); |
324 | 4d301e8e | Panagiotis Kanavos | } |
325 | 4d301e8e | Panagiotis Kanavos | |
326 | 4d301e8e | Panagiotis Kanavos | private void RetryWithoutContent(string address, int retries, string method) |
327 | 4d301e8e | Panagiotis Kanavos | { |
328 | 4d301e8e | Panagiotis Kanavos | if (address == null) |
329 | 4d301e8e | Panagiotis Kanavos | throw new ArgumentNullException("address"); |
330 | 4d301e8e | Panagiotis Kanavos | |
331 | 82db721b | Panagiotis Kanavos | var actualAddress = GetActualAddress(address); |
332 | 4d301e8e | Panagiotis Kanavos | var actualRetries = (retries == 0) ? Retries : retries; |
333 | 82db721b | Panagiotis Kanavos | |
334 | 7d915c34 | Panagiotis Kanavos | var task = Retry(() => |
335 | 4d301e8e | Panagiotis Kanavos | { |
336 | 4d301e8e | Panagiotis Kanavos | var uriString = String.Join("/",BaseAddress ,actualAddress); |
337 | 4d301e8e | Panagiotis Kanavos | var uri = new Uri(uriString); |
338 | 4d301e8e | Panagiotis Kanavos | var request = GetWebRequest(uri); |
339 | 4d301e8e | Panagiotis Kanavos | request.Method = method; |
340 | 4d301e8e | Panagiotis Kanavos | if (ResponseHeaders!=null) |
341 | 4d301e8e | Panagiotis Kanavos | ResponseHeaders.Clear(); |
342 | 4d301e8e | Panagiotis Kanavos | |
343 | 82db721b | Panagiotis Kanavos | TraceStart(method, uriString); |
344 | 0af3141d | Panagiotis Kanavos | if (method == "PUT") |
345 | 0af3141d | Panagiotis Kanavos | request.ContentLength = 0; |
346 | 06f11e8b | Panagiotis Kanavos | |
347 | 692ec33b | Panagiotis Kanavos | //Have to use try/finally instead of using here, because WebClient needs a valid WebResponse object |
348 | 692ec33b | Panagiotis Kanavos | //in order to return response headers |
349 | 4d301e8e | Panagiotis Kanavos | var response = (HttpWebResponse)GetWebResponse(request); |
350 | 692ec33b | Panagiotis Kanavos | try |
351 | 692ec33b | Panagiotis Kanavos | { |
352 | 692ec33b | Panagiotis Kanavos | LastModified = response.LastModified; |
353 | 692ec33b | Panagiotis Kanavos | StatusCode = response.StatusCode; |
354 | 692ec33b | Panagiotis Kanavos | StatusDescription = response.StatusDescription; |
355 | 692ec33b | Panagiotis Kanavos | } |
356 | 692ec33b | Panagiotis Kanavos | finally |
357 | 692ec33b | Panagiotis Kanavos | { |
358 | 692ec33b | Panagiotis Kanavos | response.Close(); |
359 | 692ec33b | Panagiotis Kanavos | } |
360 | 4d301e8e | Panagiotis Kanavos | |
361 | 4d301e8e | Panagiotis Kanavos | |
362 | 4d301e8e | Panagiotis Kanavos | return 0; |
363 | 4d301e8e | Panagiotis Kanavos | }, actualRetries); |
364 | 4d301e8e | Panagiotis Kanavos | |
365 | 5ce54458 | Panagiotis Kanavos | try |
366 | 5ce54458 | Panagiotis Kanavos | { |
367 | 5ce54458 | Panagiotis Kanavos | task.Wait(); |
368 | 5ce54458 | Panagiotis Kanavos | } |
369 | 5ce54458 | Panagiotis Kanavos | catch (AggregateException ex) |
370 | 5ce54458 | Panagiotis Kanavos | { |
371 | 5ce54458 | Panagiotis Kanavos | var exc = ex.InnerException; |
372 | 5ce54458 | Panagiotis Kanavos | if (exc is RetryException) |
373 | 5ce54458 | Panagiotis Kanavos | { |
374 | 5120f3cb | Panagiotis Kanavos | Log.ErrorFormat("[{0}] RETRY FAILED for {1} after {2} retries",method,address,retries); |
375 | 5ce54458 | Panagiotis Kanavos | } |
376 | 5ce54458 | Panagiotis Kanavos | else |
377 | 5ce54458 | Panagiotis Kanavos | { |
378 | 5120f3cb | Panagiotis Kanavos | Log.ErrorFormat("[{0}] FAILED for {1} with \n{2}", method, address, exc); |
379 | 5ce54458 | Panagiotis Kanavos | } |
380 | c28a075a | Panagiotis Kanavos | throw exc; |
381 | 5ce54458 | Panagiotis Kanavos | |
382 | 5ce54458 | Panagiotis Kanavos | } |
383 | 5ce54458 | Panagiotis Kanavos | catch(Exception ex) |
384 | 5ce54458 | Panagiotis Kanavos | { |
385 | 5120f3cb | Panagiotis Kanavos | Log.ErrorFormat("[{0}] FAILED for {1} with \n{2}", method, address, ex); |
386 | 5ce54458 | Panagiotis Kanavos | throw; |
387 | 5ce54458 | Panagiotis Kanavos | } |
388 | 4d301e8e | Panagiotis Kanavos | } |
389 | 9c4346c9 | Panagiotis Kanavos | |
390 | 82db721b | Panagiotis Kanavos | private static void TraceStart(string method, string actualAddress) |
391 | 82db721b | Panagiotis Kanavos | { |
392 | 5120f3cb | Panagiotis Kanavos | Log.InfoFormat("[{0}] {1} {2}", method, DateTime.Now, actualAddress); |
393 | 82db721b | Panagiotis Kanavos | } |
394 | 82db721b | Panagiotis Kanavos | |
395 | 4d301e8e | Panagiotis Kanavos | private string GetActualAddress(string address) |
396 | 4d301e8e | Panagiotis Kanavos | { |
397 | 4d301e8e | Panagiotis Kanavos | if (Parameters.Count == 0) |
398 | 4d301e8e | Panagiotis Kanavos | return address; |
399 | 4d301e8e | Panagiotis Kanavos | var addressBuilder=new StringBuilder(address); |
400 | 4d301e8e | Panagiotis Kanavos | |
401 | 4d301e8e | Panagiotis Kanavos | bool isFirst = true; |
402 | 4d301e8e | Panagiotis Kanavos | foreach (var parameter in Parameters) |
403 | 4d301e8e | Panagiotis Kanavos | { |
404 | 4d301e8e | Panagiotis Kanavos | if(isFirst) |
405 | 4d301e8e | Panagiotis Kanavos | addressBuilder.AppendFormat("?{0}={1}", parameter.Key, parameter.Value); |
406 | 4d301e8e | Panagiotis Kanavos | else |
407 | 4d301e8e | Panagiotis Kanavos | addressBuilder.AppendFormat("&{0}={1}", parameter.Key, parameter.Value); |
408 | 4d301e8e | Panagiotis Kanavos | isFirst = false; |
409 | 4d301e8e | Panagiotis Kanavos | } |
410 | 4d301e8e | Panagiotis Kanavos | return addressBuilder.ToString(); |
411 | 4d301e8e | Panagiotis Kanavos | } |
412 | 4d301e8e | Panagiotis Kanavos | |
413 | 4d301e8e | Panagiotis Kanavos | public string DownloadStringWithRetry(Uri address,int retries=0) |
414 | 4d301e8e | Panagiotis Kanavos | { |
415 | 4d301e8e | Panagiotis Kanavos | if (address == null) |
416 | 4d301e8e | Panagiotis Kanavos | throw new ArgumentNullException("address"); |
417 | 4d301e8e | Panagiotis Kanavos | |
418 | 4d301e8e | Panagiotis Kanavos | var actualRetries = (retries == 0) ? Retries : retries; |
419 | 7d915c34 | Panagiotis Kanavos | var task = Retry(() => |
420 | 4d301e8e | Panagiotis Kanavos | { |
421 | 4d301e8e | Panagiotis Kanavos | var content = base.DownloadString(address); |
422 | 4d301e8e | Panagiotis Kanavos | |
423 | 4d301e8e | Panagiotis Kanavos | if (StatusCode == HttpStatusCode.NoContent) |
424 | 4d301e8e | Panagiotis Kanavos | return String.Empty; |
425 | 4d301e8e | Panagiotis Kanavos | return content; |
426 | 4d301e8e | Panagiotis Kanavos | |
427 | 4d301e8e | Panagiotis Kanavos | }, actualRetries); |
428 | 4d301e8e | Panagiotis Kanavos | |
429 | 7d915c34 | Panagiotis Kanavos | var result = task.Result; |
430 | 4d301e8e | Panagiotis Kanavos | return result; |
431 | 4d301e8e | Panagiotis Kanavos | } |
432 | 4d301e8e | Panagiotis Kanavos | |
433 | d15e99b4 | Panagiotis Kanavos | |
434 | 4d301e8e | Panagiotis Kanavos | /// <summary> |
435 | 9c4346c9 | Panagiotis Kanavos | /// Copies headers from another RestClient |
436 | 4d301e8e | Panagiotis Kanavos | /// </summary> |
437 | 9c4346c9 | Panagiotis Kanavos | /// <param name="source">The RestClient from which the headers are copied</param> |
438 | 9c4346c9 | Panagiotis Kanavos | public void CopyHeaders(RestClient source) |
439 | 4d301e8e | Panagiotis Kanavos | { |
440 | 4d301e8e | Panagiotis Kanavos | if (source == null) |
441 | 4d301e8e | Panagiotis Kanavos | throw new ArgumentNullException("source", "source can't be null"); |
442 | cfed7823 | Panagiotis Kanavos | Contract.EndContractBlock(); |
443 | cfed7823 | Panagiotis Kanavos | //The Headers getter initializes the property, it is never null |
444 | cfed7823 | Panagiotis Kanavos | Contract.Assume(Headers!=null); |
445 | cfed7823 | Panagiotis Kanavos | |
446 | 4d301e8e | Panagiotis Kanavos | CopyHeaders(source.Headers,Headers); |
447 | 4d301e8e | Panagiotis Kanavos | } |
448 | 4d301e8e | Panagiotis Kanavos | |
449 | 4d301e8e | Panagiotis Kanavos | /// <summary> |
450 | d15e99b4 | Panagiotis Kanavos | /// Copies headers from one header collection to another |
451 | 4d301e8e | Panagiotis Kanavos | /// </summary> |
452 | d15e99b4 | Panagiotis Kanavos | /// <param name="source">The source collection from which the headers are copied</param> |
453 | d15e99b4 | Panagiotis Kanavos | /// <param name="target">The target collection to which the headers are copied</param> |
454 | 4d301e8e | Panagiotis Kanavos | public static void CopyHeaders(WebHeaderCollection source,WebHeaderCollection target) |
455 | 4d301e8e | Panagiotis Kanavos | { |
456 | 4d301e8e | Panagiotis Kanavos | if (source == null) |
457 | 4d301e8e | Panagiotis Kanavos | throw new ArgumentNullException("source", "source can't be null"); |
458 | 4d301e8e | Panagiotis Kanavos | if (target == null) |
459 | 4d301e8e | Panagiotis Kanavos | throw new ArgumentNullException("target", "target can't be null"); |
460 | cfed7823 | Panagiotis Kanavos | Contract.EndContractBlock(); |
461 | cfed7823 | Panagiotis Kanavos | |
462 | 4d301e8e | Panagiotis Kanavos | for (int i = 0; i < source.Count; i++) |
463 | 4d301e8e | Panagiotis Kanavos | { |
464 | 4d301e8e | Panagiotis Kanavos | target.Add(source.GetKey(i), source[i]); |
465 | 4d301e8e | Panagiotis Kanavos | } |
466 | 4d301e8e | Panagiotis Kanavos | } |
467 | 4d301e8e | Panagiotis Kanavos | |
468 | 4d301e8e | Panagiotis Kanavos | public void AssertStatusOK(string message) |
469 | 4d301e8e | Panagiotis Kanavos | { |
470 | 4d301e8e | Panagiotis Kanavos | if (StatusCode >= HttpStatusCode.BadRequest) |
471 | 4d301e8e | Panagiotis Kanavos | throw new WebException(String.Format("{0} with code {1} - {2}", message, StatusCode, StatusDescription)); |
472 | 4d301e8e | Panagiotis Kanavos | } |
473 | 4d301e8e | Panagiotis Kanavos | |
474 | 4d301e8e | Panagiotis Kanavos | |
475 | 0c02aa65 | Panagiotis Kanavos | private Task<T> Retry<T>(Func<T> original, int retryCount, TaskCompletionSource<T> tcs = null) |
476 | 7d915c34 | Panagiotis Kanavos | { |
477 | cfed7823 | Panagiotis Kanavos | if (original==null) |
478 | cfed7823 | Panagiotis Kanavos | throw new ArgumentNullException("original"); |
479 | cfed7823 | Panagiotis Kanavos | Contract.EndContractBlock(); |
480 | cfed7823 | Panagiotis Kanavos | |
481 | 0c02aa65 | Panagiotis Kanavos | if (tcs == null) |
482 | 0c02aa65 | Panagiotis Kanavos | tcs = new TaskCompletionSource<T>(); |
483 | 0c02aa65 | Panagiotis Kanavos | Task.Factory.StartNew(original).ContinueWith(_original => |
484 | 7d915c34 | Panagiotis Kanavos | { |
485 | 0c02aa65 | Panagiotis Kanavos | if (!_original.IsFaulted) |
486 | 0c02aa65 | Panagiotis Kanavos | tcs.SetFromTask(_original); |
487 | 0c02aa65 | Panagiotis Kanavos | else |
488 | 7d915c34 | Panagiotis Kanavos | { |
489 | 7d915c34 | Panagiotis Kanavos | var e = _original.Exception.InnerException; |
490 | 0c02aa65 | Panagiotis Kanavos | var we = (e as WebException); |
491 | 0c02aa65 | Panagiotis Kanavos | if (we==null) |
492 | 0c02aa65 | Panagiotis Kanavos | tcs.SetException(e); |
493 | 0c02aa65 | Panagiotis Kanavos | else |
494 | 7d915c34 | Panagiotis Kanavos | { |
495 | 0c02aa65 | Panagiotis Kanavos | var statusCode = GetStatusCode(we); |
496 | 0c02aa65 | Panagiotis Kanavos | |
497 | 0c02aa65 | Panagiotis Kanavos | //Return null for 404 |
498 | 0c02aa65 | Panagiotis Kanavos | if (statusCode == HttpStatusCode.NotFound) |
499 | 0c02aa65 | Panagiotis Kanavos | tcs.SetResult(default(T)); |
500 | 0c02aa65 | Panagiotis Kanavos | //Retry for timeouts and service unavailable |
501 | 0c02aa65 | Panagiotis Kanavos | else if (we.Status == WebExceptionStatus.Timeout || |
502 | 0c02aa65 | Panagiotis Kanavos | (we.Status == WebExceptionStatus.ProtocolError && statusCode == HttpStatusCode.ServiceUnavailable)) |
503 | 7d915c34 | Panagiotis Kanavos | { |
504 | 7d915c34 | Panagiotis Kanavos | TimedOut = true; |
505 | 7d915c34 | Panagiotis Kanavos | if (retryCount == 0) |
506 | 5ce54458 | Panagiotis Kanavos | { |
507 | 5120f3cb | Panagiotis Kanavos | Log.ErrorFormat("[ERROR] Timed out too many times. \n{0}\n",e); |
508 | 0c02aa65 | Panagiotis Kanavos | tcs.SetException(new RetryException("Timed out too many times.", e)); |
509 | 0c02aa65 | Panagiotis Kanavos | } |
510 | 0c02aa65 | Panagiotis Kanavos | else |
511 | 0c02aa65 | Panagiotis Kanavos | { |
512 | 5120f3cb | Panagiotis Kanavos | Log.ErrorFormat( |
513 | 0c02aa65 | Panagiotis Kanavos | "[RETRY] Timed out after {0} ms. Will retry {1} more times\n{2}", Timeout, |
514 | 0c02aa65 | Panagiotis Kanavos | retryCount, e); |
515 | 0c02aa65 | Panagiotis Kanavos | Retry(original, retryCount - 1, tcs); |
516 | 7d915c34 | Panagiotis Kanavos | } |
517 | 7d915c34 | Panagiotis Kanavos | } |
518 | 0c02aa65 | Panagiotis Kanavos | else |
519 | 0c02aa65 | Panagiotis Kanavos | tcs.SetException(e); |
520 | 7d915c34 | Panagiotis Kanavos | } |
521 | 0c02aa65 | Panagiotis Kanavos | }; |
522 | 0c02aa65 | Panagiotis Kanavos | }); |
523 | 0c02aa65 | Panagiotis Kanavos | return tcs.Task; |
524 | 4d301e8e | Panagiotis Kanavos | } |
525 | 4d301e8e | Panagiotis Kanavos | |
526 | 0c02aa65 | Panagiotis Kanavos | private HttpStatusCode GetStatusCode(WebException we) |
527 | 0c02aa65 | Panagiotis Kanavos | { |
528 | cfed7823 | Panagiotis Kanavos | if (we==null) |
529 | cfed7823 | Panagiotis Kanavos | throw new ArgumentNullException("we"); |
530 | 0c02aa65 | Panagiotis Kanavos | var statusCode = HttpStatusCode.RequestTimeout; |
531 | 0c02aa65 | Panagiotis Kanavos | if (we.Response != null) |
532 | 0c02aa65 | Panagiotis Kanavos | { |
533 | 0c02aa65 | Panagiotis Kanavos | statusCode = ((HttpWebResponse) we.Response).StatusCode; |
534 | 0c02aa65 | Panagiotis Kanavos | this.StatusCode = statusCode; |
535 | 0c02aa65 | Panagiotis Kanavos | } |
536 | 0c02aa65 | Panagiotis Kanavos | return statusCode; |
537 | 0c02aa65 | Panagiotis Kanavos | } |
538 | cfed7823 | Panagiotis Kanavos | |
539 | cfed7823 | Panagiotis Kanavos | public UriBuilder GetAddressBuilder(string container, string objectName) |
540 | cfed7823 | Panagiotis Kanavos | { |
541 | cfed7823 | Panagiotis Kanavos | var builder = new UriBuilder(String.Join("/", BaseAddress, container, objectName)); |
542 | cfed7823 | Panagiotis Kanavos | return builder; |
543 | cfed7823 | Panagiotis Kanavos | } |
544 | c92e02f3 | Panagiotis Kanavos | |
545 | c92e02f3 | Panagiotis Kanavos | public Dictionary<string, string> GetMeta(string metaPrefix) |
546 | c92e02f3 | Panagiotis Kanavos | { |
547 | c92e02f3 | Panagiotis Kanavos | if (String.IsNullOrWhiteSpace(metaPrefix)) |
548 | c92e02f3 | Panagiotis Kanavos | throw new ArgumentNullException("metaPrefix"); |
549 | c92e02f3 | Panagiotis Kanavos | Contract.EndContractBlock(); |
550 | c92e02f3 | Panagiotis Kanavos | |
551 | c92e02f3 | Panagiotis Kanavos | var keys = ResponseHeaders.AllKeys.AsQueryable(); |
552 | c92e02f3 | Panagiotis Kanavos | var dict = (from key in keys |
553 | c92e02f3 | Panagiotis Kanavos | where key.StartsWith(metaPrefix) |
554 | c92e02f3 | Panagiotis Kanavos | let name = key.Substring(metaPrefix.Length) |
555 | c92e02f3 | Panagiotis Kanavos | select new { Name = name, Value = ResponseHeaders[key] }) |
556 | c92e02f3 | Panagiotis Kanavos | .ToDictionary(t => t.Name, t => t.Value); |
557 | c92e02f3 | Panagiotis Kanavos | return dict; |
558 | c92e02f3 | Panagiotis Kanavos | } |
559 | 4d301e8e | Panagiotis Kanavos | } |
560 | 4d301e8e | Panagiotis Kanavos | |
561 | 4d301e8e | Panagiotis Kanavos | public class RetryException:Exception |
562 | 4d301e8e | Panagiotis Kanavos | { |
563 | 4d301e8e | Panagiotis Kanavos | public RetryException() |
564 | 4d301e8e | Panagiotis Kanavos | :base() |
565 | 4d301e8e | Panagiotis Kanavos | { |
566 | 4d301e8e | Panagiotis Kanavos | |
567 | 4d301e8e | Panagiotis Kanavos | } |
568 | 4d301e8e | Panagiotis Kanavos | |
569 | 4d301e8e | Panagiotis Kanavos | public RetryException(string message) |
570 | 4d301e8e | Panagiotis Kanavos | :base(message) |
571 | 4d301e8e | Panagiotis Kanavos | { |
572 | 4d301e8e | Panagiotis Kanavos | |
573 | 4d301e8e | Panagiotis Kanavos | } |
574 | 4d301e8e | Panagiotis Kanavos | |
575 | 4d301e8e | Panagiotis Kanavos | public RetryException(string message,Exception innerException) |
576 | 4d301e8e | Panagiotis Kanavos | :base(message,innerException) |
577 | 4d301e8e | Panagiotis Kanavos | { |
578 | 4d301e8e | Panagiotis Kanavos | |
579 | 4d301e8e | Panagiotis Kanavos | } |
580 | 4d301e8e | Panagiotis Kanavos | |
581 | 4d301e8e | Panagiotis Kanavos | public RetryException(SerializationInfo info,StreamingContext context) |
582 | 4d301e8e | Panagiotis Kanavos | :base(info,context) |
583 | 4d301e8e | Panagiotis Kanavos | { |
584 | 4d301e8e | Panagiotis Kanavos | |
585 | 4d301e8e | Panagiotis Kanavos | } |
586 | 4d301e8e | Panagiotis Kanavos | } |
587 | 4d301e8e | Panagiotis Kanavos | } |