bool TryDownload(MultiMirrorFileDownloadSpec spec, Uri host)
{
try {
TryDownloadFile(spec, host);
spec.End();
return(true);
} catch (TransferException) {} catch (VerificationError) {}
return(false);
}
async Task <bool> TryDownloadAsync(MultiMirrorFileDownloadSpec spec, Uri host)
{
try {
await TryDownloadFileAsync(spec, host).ConfigureAwait(false);
spec.End();
return(true);
} catch (TransferException) {} catch (VerificationError) {}
return(false);
}
static FileDownloadSpec BuildSpec(MultiMirrorFileDownloadSpec spec, Uri host) => spec.Progress == null
? new FileDownloadSpec(spec.GetUri(host), spec.LocalFile)
{
Verification = spec.Verification,
CancellationToken = spec.CancellationToken,
ExistingFile = spec.ExistingFile
}
: new FileDownloadSpec(spec.GetUri(host), spec.LocalFile, spec.Progress)
{
Verification = spec.Verification,
CancellationToken = spec.CancellationToken,
ExistingFile = spec.ExistingFile
};
protected static MultiMirrorFileDownloadSpec GetDlSpec(FileQueueSpec spec,
KeyValuePair <FileFetchInfo, ITransferStatus> file)
{
var dlSpec = new MultiMirrorFileDownloadSpec(file.Key.FilePath,
spec.Location.GetChildFileWithName(file.Key.FilePath))
{
Progress = file.Value,
Verification = file.Key.OnVerify,
ExistingFile =
file.Key.ExistingPath != null?spec.Location.GetChildFileWithName(file.Key.ExistingPath) : null
};
dlSpec.LocalFile.MakeSureParentPathExists();
return(dlSpec);
}
protected void TryDownloadFile(MultiMirrorFileDownloadSpec spec, Uri host)
{
try {
_downloader.Download(BuildSpec(spec, host));
} catch (Exception ex) {
if (!(ex is IProgramError))
{
_mirrorStrategy.Failure(host);
}
else
{
_mirrorStrategy.ProgramFailure();
}
throw;
}
_mirrorStrategy.Success(host);
}
protected async Task TryDownloadFileAsync(MultiMirrorFileDownloadSpec spec, Uri host)
{
try {
await _downloader.DownloadAsync(BuildSpec(spec, host))
.ConfigureAwait(false);
} catch (Exception ex) {
if (!(ex is IProgramError))
{
_mirrorStrategy.Failure(host);
}
else
{
_mirrorStrategy.ProgramFailure();
}
throw;
}
_mirrorStrategy.Success(host);
}
public void Download(MultiMirrorFileDownloadSpec spec)
{
spec.Start();
try {
while (true)
{
var host = _mirrorStrategy.GetHost();
if (TryDownload(spec, host))
{
break;
}
ResetSpec(spec);
Thread.Sleep(MillisecondsTimeout);
}
} catch (Exception) {
spec.Fail();
throw;
}
}
public void Download(MultiMirrorFileDownloadSpec spec, CancellationToken token)
{
spec.Start();
try {
while (true)
{
token.ThrowIfCancellationRequested();
var host = _mirrorStrategy.GetHost();
if (TryDownload(spec, host))
{
break;
}
spec.Progress?.Reset();
Thread.Sleep(MillisecondsTimeout);
}
} catch (Exception) {
spec.Fail();
throw;
}
}
public async Task DownloadAsync(MultiMirrorFileDownloadSpec spec)
{
spec.Start();
try {
while (true)
{
var host = _mirrorStrategy.GetHost();
spec.UpdateHost(host);
if (await TryDownloadAsync(spec, host).ConfigureAwait(false))
{
break;
}
ResetSpec(spec);
await Task.Delay(MillisecondsTimeout).ConfigureAwait(false);
}
} catch (Exception) {
spec.Fail();
throw;
}
}
private static void ResetSpec(MultiMirrorFileDownloadSpec spec) => spec.Progress?.Update(null, spec.Progress.Progress);
