osu/osu.Game/Online/API/APIDownloadRequest.cs

53 lines
1.5 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.IO;
using osu.Framework.IO.Network;
namespace osu.Game.Online.API
{
public abstract class APIDownloadRequest : APIRequest
{
private string filename;
/// <summary>
/// Used to set the extension of the file returned by this request.
/// </summary>
protected virtual string FileExtension { get; } = @".tmp";
protected override WebRequest CreateWebRequest()
{
var file = Path.GetTempFileName();
File.Move(file, filename = Path.ChangeExtension(file, FileExtension));
var request = new FileWebRequest(filename, Uri);
request.DownloadProgress += request_Progress;
return request;
}
private void request_Progress(long current, long total) => API.Schedule(() => Progressed?.Invoke(current, total));
protected void TriggerSuccess(string filename)
{
if (this.filename != null)
throw new InvalidOperationException("Attempted to trigger success more than once");
this.filename = filename;
TriggerSuccess();
}
internal override void TriggerSuccess()
{
base.TriggerSuccess();
Success?.Invoke(filename);
}
public event APIProgressHandler Progressed;
public new event APISuccessHandler<string> Success;
}
}