mirror of
https://github.com/Sarsoo/IF.Lastfm.git
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b249ea7fa8
Using this mean clients don't have to wrap every call in try/catches http://stackoverflow.com/questions/18562613/async-method-returning-taskt-with-generic-constraint-in-c-sharp?noredirect=1#comment27311729_18562613
58 lines
1.5 KiB
C#
58 lines
1.5 KiB
C#
using System;
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using System.Linq;
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using System.Net.Http;
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using System.Threading.Tasks;
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using IF.Lastfm.Core.Api.Enums;
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using IF.Lastfm.Core.Api.Helpers;
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namespace IF.Lastfm.Core.Api.Commands
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{
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public abstract class GetAsyncCommandBase<T> : LastAsyncCommandBase<T> where T : LastResponse, new()
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{
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protected GetAsyncCommandBase(IAuth auth)
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{
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Auth = auth;
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}
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public async override Task<T> ExecuteAsync()
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{
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SetParameters();
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EscapeParameters();
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Url = BuildRequestUrl();
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try
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{
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var httpClient = new HttpClient();
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var response = await httpClient.GetAsync(Url);
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return await HandleResponse(response);
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}
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catch (HttpRequestException)
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{
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if (LastFm.CatchRequestExceptions)
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{
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return LastResponse.CreateErrorResponse<T>(LastFmApiError.RequestFailed);
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}
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else
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{
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throw;
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}
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}
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}
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protected override Uri BuildRequestUrl()
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{
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var apiUrl = LastFm.FormatApiUrl(Method, Auth.ApiKey, Parameters);
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return new Uri(apiUrl, UriKind.Absolute);
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}
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private void EscapeParameters()
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{
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foreach (var key in Parameters.Keys.ToList())
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{
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Parameters[key] = Uri.EscapeDataString(Parameters[key]);
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}
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}
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}
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} |