// OpenTween - Client of Twitter
// Copyright (c) 2016 kim_upsilon (@kim_upsilon)
// All rights reserved.
//
// This file is part of OpenTween.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see , or write to
// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
// Boston, MA 02110-1301, USA.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Runtime.Serialization;
using System.Text;
using System.Threading.Tasks;
using OpenTween.Api;
namespace OpenTween.Connection
{
///
/// HTTP レスポンスの受信と JSON のパース処理を延期させるクラス
///
public sealed class LazyJson : IDisposable
{
public HttpResponseMessage Response { get; }
private T instance;
private bool completed = false;
public LazyJson(HttpResponseMessage response)
{
this.Response = response;
}
internal LazyJson(T instance)
{
this.Response = null;
this.instance = instance;
this.completed = true;
}
public async Task LoadJsonAsync()
{
if (this.completed)
return this.instance;
using (var content = this.Response.Content)
{
var responseText = await content.ReadAsStringAsync()
.ConfigureAwait(false);
try
{
this.instance = MyCommon.CreateDataFromJson(responseText);
this.completed = true;
return this.instance;
}
catch (SerializationException ex)
{
throw TwitterApiException.CreateFromException(ex, responseText);
}
}
}
public void Dispose()
{
this.Response?.Dispose();
}
}
public static class LazyJson
{
public static LazyJson Create(T instance)
=> new LazyJson(instance);
}
public static class LazyJsonTaskExtension
{
public static async Task IgnoreResponse(this Task> task)
{
using (var lazyJson = await task.ConfigureAwait(false))
{
// レスポンスボディを読み込まず破棄する
}
}
}
}