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comparison Agendas/trunk/src/Agendas.Google/GUrlShortenerAdapter.cs @ 189:fe47f11f5f20

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Adapter para url shorten de google
author nelopauselli
date Tue, 09 Aug 2011 09:38:28 -0300
parents
children e6abe8e1a794
comparison
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188:49125b681709 189:fe47f11f5f20
1 using System.IO;
2 using System.Net;
3 using AltNetHispano.Agendas.Configurations;
4
5 namespace AltNetHispano.Agendas.Google
6 {
7 public class GUrlShortenerAdapter
8 {
9 private readonly ShortenConfigurationElement _config;
10
11 public GUrlShortenerAdapter()
12 {
13 _config = AgendasConfigurationManager.Publicadores.Google.Shorten;
14 }
15
16 public string GetShortUrl(string url)
17 {
18 WebRequest request = WebRequest.Create(_config.UrlAPI);
19 request.Method = WebRequestMethods.Http.Post;
20 request.ContentType = "application/json";
21
22 using(var writer = new StreamWriter(request.GetRequestStream()))
23 {
24 var json = string.Format("{{\"longUrl\": \"{0}\"}}", url);
25 writer.Write(json);
26 }
27
28 var response = request.GetResponse();
29
30 using(var reader = new StreamReader(response.GetResponseStream()))
31 {
32 const string prefix = "\"id\": \"";
33
34 var json = reader.ReadToEnd();
35
36 var start = json.IndexOf(prefix) + prefix.Length;
37 if (start>prefix.Length)
38 {
39 var length = json.IndexOf("\",", start) - start;
40
41 if (length>0)
42 return json.Substring(start, length);
43 }
44 }
45 return string.Empty;
46 }
47 }
48 }