Workaround for HttpClient's caching

See
http://stackoverflow.com/questions/6334788/windows-phone-7-webrequest-caching

IF.Lastfm.Core/Api/Commands/AlbumApi/GetAlbumInfoCommand.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Net.Http;
-using System.Text;
 using System.Threading.Tasks;
 using IF.Lastfm.Core.Api.Enums;
 using IF.Lastfm.Core.Api.Helpers;
@@ -34,6 +32,8 @@ public override Uri BuildRequestUrl()
                     {"autocorrect", Convert.ToInt32(Autocorrect).ToString()}
                 };
 
+            base.DisableCaching(parameters);
+
             var apiUrl = LastFm.FormatApiUrl(Method, Auth.ApiKey, parameters);
             return new Uri(apiUrl, UriKind.Absolute);
         }

IF.Lastfm.Core/Api/Commands/ArtistApi/GetArtistInfoCommand.cs

@@ -33,6 +33,8 @@ public override Uri BuildRequestUrl()
                     {"autocorrect", Convert.ToInt32(Autocorrect).ToString()}
                 };
 
+            base.DisableCaching(parameters);
+
             var apiUrl = LastFm.FormatApiUrl(Method, Auth.ApiKey, parameters);
             return new Uri(apiUrl, UriKind.Absolute);
         }

IF.Lastfm.Core/Api/Commands/GetAsyncCommandBase.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Net.Http;
+using System.Net.Http.Headers;
 using System.Threading.Tasks;
 
 namespace IF.Lastfm.Core.Api.Commands
@@ -37,5 +38,15 @@ protected void AddPagingParameters(Dictionary<string, string> parameters)
             parameters.Add("page", Page.ToString());
             parameters.Add("limit", Count.ToString());
         }
+
+        /// <summary>
+        /// Annoying workaround for Windows Phone's caching... 
+        /// see http://stackoverflow.com/questions/6334788/windows-phone-7-webrequest-caching
+        /// </summary>
+        /// <param name="parameters"></param>
+        protected void DisableCaching(Dictionary<string, string> parameters)
+        {
+            parameters.Add("disablecachetoken", DateTime.UtcNow.Ticks.ToString());
+        }
     }
 }

IF.Lastfm.Core/Api/Commands/TrackApi/GetTrackInfoCommand.cs

@@ -41,6 +41,8 @@ public override Uri BuildRequestUrl()
                 parameters.Add("username", Username);
             }
 
+            DisableCaching(parameters);
+
             var apiUrl = LastFm.FormatApiUrl(Method, Auth.ApiKey, parameters);
             return new Uri(apiUrl, UriKind.Absolute);
         }

IF.Lastfm.Core/Api/Commands/TrackApi/GetTrackShoutsCommand.cs

@@ -35,6 +35,7 @@ public override Uri BuildRequestUrl()
                 };
 
             base.AddPagingParameters(parameters);
+            base.DisableCaching(parameters);
 
             var apiUrl = LastFm.FormatApiUrl(Method, Auth.ApiKey, parameters);
             return new Uri(apiUrl, UriKind.Absolute);

IF.Lastfm.Core/Api/Commands/UserApi/GetRecentScrobblesCommand.cs

@@ -31,6 +31,7 @@ public override Uri BuildRequestUrl()
                              };
 
             base.AddPagingParameters(parameters);
+            base.DisableCaching(parameters);
 
             var uristring = LastFm.FormatApiUrl(Method, Auth.ApiKey, parameters);
             return new Uri(uristring, UriKind.Absolute);

IF.Lastfm.Core/Api/Commands/UserApi/GetTopAlbumsCommand.cs

@@ -32,6 +32,7 @@ public override Uri BuildRequestUrl()
                              };
 
             base.AddPagingParameters(parameters);
+            base.DisableCaching(parameters);
 
             var uristring = LastFm.FormatApiUrl(Method, Auth.ApiKey, parameters);
             return new Uri(uristring, UriKind.Absolute);

IF.Lastfm.Core/IF.Lastfm.Core.csproj

@@ -41,7 +41,7 @@
   <ItemGroup>
     <Compile Include="Api\AlbumApi.cs" />
     <Compile Include="Api\ArtistApi.cs" />
-    <Compile Include="Api\Commands\AlbumApi\GetAbumInfoCommand.cs" />
+    <Compile Include="Api\Commands\AlbumApi\GetAlbumInfoCommand.cs" />
     <Compile Include="Api\Commands\ArtistApi\GetArtistInfoCommand.cs" />
     <Compile Include="Api\Commands\GetAsyncCommandBase.cs" />
     <Compile Include="Api\Commands\PostAsyncCommandBase.cs" />