public static async Task <Exception> DownloadForgeJLibrariesAsync(ProgressCallback monitor, DownloadSource source, CancellationToken cancelToken, List <JLibrary> libs, string librariesDir)
{
try
{
foreach (var item in libs)
{
monitor.SetDoneSize(0);
monitor.SetState(string.Format("补全库文件{0}", item.Name));
Exception exception = null;
for (int i = 1; i <= 3; i++)
{
try
{
string from = GetDownloadUrl.DoURLReplace(source, item.Downloads.Artifact.URL);
string to = Path.Combine(librariesDir, item.Downloads.Artifact.Path);
string buffFilename = to + ".downloadtask";
if (File.Exists(to))
{
goto a;
}
if (string.IsNullOrWhiteSpace(from))
{
goto a;
}
if (Path.IsPathRooted(to))
{
string dirName = Path.GetDirectoryName(to);
if (!Directory.Exists(dirName))
{
Directory.CreateDirectory(dirName);
}
}
if (File.Exists(buffFilename))
{
File.Delete(buffFilename);
}
using (var getResult = await HttpRequesterAPI.HttpGetAsync(from, cancelToken))
{
getResult.EnsureSuccessStatusCode();
monitor.SetTotalSize(getResult.Content.Headers.ContentLength.GetValueOrDefault());
using (Stream responseStream = await getResult.Content.ReadAsStreamAsync())
{
using (FileStream fs = new FileStream(buffFilename, FileMode.Create))
{
byte[] bArr = new byte[1024];
int size = await responseStream.ReadAsync(bArr, 0, (int)bArr.Length);
while (size > 0)
{
if (cancelToken.IsCancellationRequested)
{
return(null);
}
fs.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
monitor.IncreaseDoneSize(size);
}
}
}
}
//下载完成后转正
File.Move(buffFilename, to);
monitor.SetDone();
break;
}
catch (Exception e)
{
exception = e;
monitor.SetState(string.Format("重试第{0}次", i));
//继续重试
continue;
}
}
a :;
}
return(null);
}
catch (Exception e)
{
return(e);
}
}