3b5798b5e8
The Download class cancels asynchronously, which means callers must handle cancellation inside the completion event, and not after requesting cancellation.
85 lines
2.2 KiB
C#
85 lines
2.2 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2016 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you 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. For more
|
|
* information, see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.ComponentModel;
|
|
using System.Net;
|
|
|
|
namespace OpenRA
|
|
{
|
|
public class Download
|
|
{
|
|
readonly object syncObject = new object();
|
|
WebClient wc;
|
|
|
|
public static string FormatErrorMessage(Exception e)
|
|
{
|
|
var ex = e as WebException;
|
|
if (ex == null)
|
|
return e.Message;
|
|
|
|
switch (ex.Status)
|
|
{
|
|
case WebExceptionStatus.RequestCanceled:
|
|
return "Cancelled";
|
|
case WebExceptionStatus.NameResolutionFailure:
|
|
return "DNS lookup failed";
|
|
case WebExceptionStatus.Timeout:
|
|
return "Connection timeout";
|
|
case WebExceptionStatus.ConnectFailure:
|
|
return "Cannot connect to remote server";
|
|
case WebExceptionStatus.ProtocolError:
|
|
return "File not found on remote server";
|
|
default:
|
|
return ex.Message;
|
|
}
|
|
}
|
|
|
|
public Download(string url, string path, Action<DownloadProgressChangedEventArgs> onProgress, Action<AsyncCompletedEventArgs> onComplete)
|
|
{
|
|
lock (syncObject)
|
|
{
|
|
wc = new WebClient { Proxy = null };
|
|
wc.DownloadProgressChanged += (_, a) => onProgress(a);
|
|
wc.DownloadFileCompleted += (_, a) => { DisposeWebClient(); onComplete(a); };
|
|
wc.DownloadFileAsync(new Uri(url), path);
|
|
}
|
|
}
|
|
|
|
public Download(string url, Action<DownloadProgressChangedEventArgs> onProgress, Action<DownloadDataCompletedEventArgs> onComplete)
|
|
{
|
|
lock (syncObject)
|
|
{
|
|
wc = new WebClient { Proxy = null };
|
|
wc.DownloadProgressChanged += (_, a) => onProgress(a);
|
|
wc.DownloadDataCompleted += (_, a) => { DisposeWebClient(); onComplete(a); };
|
|
wc.DownloadDataAsync(new Uri(url));
|
|
}
|
|
}
|
|
|
|
void DisposeWebClient()
|
|
{
|
|
lock (syncObject)
|
|
{
|
|
wc.Dispose();
|
|
wc = null;
|
|
}
|
|
}
|
|
|
|
public void CancelAsync()
|
|
{
|
|
lock (syncObject)
|
|
if (wc != null)
|
|
wc.CancelAsync();
|
|
}
|
|
}
|
|
}
|