Mercurial > altnet-hispano
annotate Agendas/trunk/src/Agendas.Google/GUrlShortenerAdapter.cs @ 234:cc71f96ac134
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| author | juanjose.montesdeocaarbos |
|---|---|
| date | Tue, 04 Oct 2011 20:36:27 -0300 |
| parents | 806fd94727ce |
| children |
| rev | line source |
|---|---|
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806fd94727ce
Validación de parámetros en GUrlShortener
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1 using System; |
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2 using System.IO; |
| 189 | 3 using System.Net; |
| 4 using AltNetHispano.Agendas.Configurations; | |
| 5 | |
| 6 namespace AltNetHispano.Agendas.Google | |
| 7 { | |
| 8 public class GUrlShortenerAdapter | |
| 9 { | |
| 10 private readonly ShortenConfigurationElement _config; | |
| 11 | |
| 12 public GUrlShortenerAdapter() | |
| 13 { | |
| 14 _config = AgendasConfigurationManager.Publicadores.Google.Shorten; | |
| 15 } | |
| 16 | |
| 17 public string GetShortUrl(string url) | |
| 18 { | |
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19 if (url == null) |
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20 throw new ArgumentNullException("url"); |
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21 else if (string.IsNullOrWhiteSpace(url)) |
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22 throw new ArgumentException(); |
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23 |
| 189 | 24 WebRequest request = WebRequest.Create(_config.UrlAPI); |
| 25 request.Method = WebRequestMethods.Http.Post; | |
| 26 request.ContentType = "application/json"; | |
| 190 | 27 |
| 28 using (var writer = new StreamWriter(request.GetRequestStream())) | |
| 189 | 29 { |
| 30 var json = string.Format("{{\"longUrl\": \"{0}\"}}", url); | |
| 31 writer.Write(json); | |
| 32 } | |
| 33 | |
| 190 | 34 var response = request.GetResponse() as HttpWebResponse; |
| 189 | 35 |
| 190 | 36 if (response != null && response.StatusCode == HttpStatusCode.OK) |
| 189 | 37 { |
| 190 | 38 var stream = response.GetResponseStream(); |
| 189 | 39 |
| 190 | 40 if (stream != null) |
| 41 { | |
| 42 using (var reader = new StreamReader(stream)) | |
| 43 { | |
| 44 const string prefix = "\"id\": \""; | |
| 189 | 45 |
| 190 | 46 var json = reader.ReadToEnd(); |
| 189 | 47 |
| 190 | 48 var start = json.IndexOf(prefix) + prefix.Length; |
| 49 if (start > prefix.Length) | |
| 50 { | |
| 51 var length = json.IndexOf("\",", start) - start; | |
| 52 | |
| 53 if (length > 0) | |
| 54 return json.Substring(start, length); | |
| 55 } | |
| 56 } | |
| 189 | 57 } |
| 58 } | |
| 190 | 59 |
| 189 | 60 return string.Empty; |
| 61 } | |
| 62 } | |
| 63 } |