protected static MultiMirrorFileDownloadSpec GetDlSpec(FileQueueSpec spec,
KeyValuePair<KeyValuePair<string, Func<IAbsoluteFilePath, bool>>, ITransferStatus> file) {
var dlSpec = new MultiMirrorFileDownloadSpec(file.Key.Key, spec.Location.GetChildFileWithName(file.Key.Key)) {
Progress = file.Value,
Verification = file.Key.Value
};
dlSpec.LocalFile.MakeSureParentPathExists();
return dlSpec;
}
public void Download(MultiMirrorFileDownloadSpec spec) {
spec.Start();
try {
while (true) {
var host = _mirrorStrategy.GetHost();
if (TryDownload(spec, host))
break;
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;
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;
await Task.Delay(MillisecondsTimeout).ConfigureAwait(false);
}
} catch (Exception) {
spec.Fail();
throw;
}
}
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;
}
bool TryDownload(MultiMirrorFileDownloadSpec spec, Uri host) {
try {
TryDownloadFile(spec, host);
spec.End();
return true;
} catch (TransferException) {} catch (VerificationError) {}
return false;
}
static FileDownloadSpec BuildSpec(MultiMirrorFileDownloadSpec spec, Uri host) {
return spec.Progress == null
? new FileDownloadSpec(spec.GetUri(host), spec.LocalFile) {
Verification = spec.Verification,
CancellationToken = spec.CancellationToken
}
: new FileDownloadSpec(spec.GetUri(host), spec.LocalFile, spec.Progress) {
Verification = spec.Verification,
CancellationToken = spec.CancellationToken
};
}
protected async Task TryDownloadFileAsync(MultiMirrorFileDownloadSpec spec, Uri host) {
try {
await _downloader.DownloadAsync(BuildSpec(spec, host))
.ConfigureAwait(false);
} catch (Exception) {
_mirrorStrategy.Failure(host);
throw;
}
_mirrorStrategy.Success(host);
}
protected void TryDownloadFile(MultiMirrorFileDownloadSpec spec, Uri host) {
try {
_downloader.Download(BuildSpec(spec, host));
} catch (Exception) {
_mirrorStrategy.Failure(host);
throw;
}
_mirrorStrategy.Success(host);
}