public static async Task <DownloadResourceResult> GetDownloadResultAsync(
HttpSource client,
PackageIdentity identity,
Uri uri,
PackageDownloadContext downloadContext,
string globalPackagesFolder,
ILogger logger,
CancellationToken token)
{
// Observe the NoCache argument.
var directDownload = downloadContext.DirectDownload;
DownloadResourceResult packageFromGlobalPackages = null;
try
{
packageFromGlobalPackages = GlobalPackagesFolderUtility.GetPackage(
identity,
globalPackagesFolder);
if (packageFromGlobalPackages != null)
{
if (!downloadContext.SourceCacheContext.NoCache)
{
return(packageFromGlobalPackages);
}
else
{
// The package already exists in the global packages folder but the caller has requested NoCache,
// which means the package in the global packages folder should not be used. In this particular
// case, NoCache needs to imply DirectDownload.
directDownload = true;
packageFromGlobalPackages.Dispose();
}
}
}
catch
{
packageFromGlobalPackages?.Dispose();
}
// Get the package from the source.
for (var retry = 0; retry < 3; retry++)
{
try
{
return(await client.ProcessStreamAsync(
new HttpSourceRequest(uri, logger)
{
IgnoreNotFounds = true,
MaxTries = 1
},
async packageStream =>
{
if (packageStream == null)
{
return new DownloadResourceResult(DownloadResourceResultStatus.NotFound);
}
if (directDownload)
{
return await DirectDownloadAsync(
client.PackageSource,
identity,
packageStream,
downloadContext,
token);
}
else
{
return await GlobalPackagesFolderUtility.AddPackageAsync(
client.PackageSource,
identity,
packageStream,
globalPackagesFolder,
downloadContext.ParentId,
downloadContext.ClientPolicyContext,
logger,
token);
}
},
downloadContext.SourceCacheContext,
logger,
token));
}
catch (OperationCanceledException)
{
return(new DownloadResourceResult(DownloadResourceResultStatus.Cancelled));
}
catch (SignatureException)
{
throw;
}
catch (Exception ex) when(retry < 2)
{
var message = string.Format(CultureInfo.CurrentCulture, Strings.Log_ErrorDownloading, identity, uri)
+ Environment.NewLine
+ ExceptionUtilities.DisplayMessage(ex);
logger.LogWarning(message);
}
catch (Exception ex)
{
var message = string.Format(CultureInfo.CurrentCulture, Strings.Log_ErrorDownloading, identity, uri);
throw new FatalProtocolException(message, ex);
}
}
throw new InvalidOperationException("Reached an unexpected point in the code");
}
public static async Task <DownloadResourceResult> GetDownloadResultAsync(
HttpSource client,
PackageIdentity identity,
Uri uri,
ISettings settings,
ILogger logger,
CancellationToken token)
{
// Uri is not null, so the package exists in the source
// Now, check if it is in the global packages folder, before, getting the package stream
// TODO: This code should respect no_cache settings and not write or read packages from the global packages folder
var packageFromGlobalPackages = GlobalPackagesFolderUtility.GetPackage(identity, settings);
if (packageFromGlobalPackages != null)
{
return(packageFromGlobalPackages);
}
for (int i = 0; i < 3; i++)
{
try
{
return(await client.ProcessStreamAsync(
new HttpSourceRequest(uri, logger)
{
IgnoreNotFounds = true
},
async packageStream =>
{
if (packageStream == null)
{
return new DownloadResourceResult(DownloadResourceResultStatus.NotFound);
}
return await GlobalPackagesFolderUtility.AddPackageAsync(
identity,
packageStream,
settings,
logger,
token);
},
logger,
token));
}
catch (OperationCanceledException)
{
return(new DownloadResourceResult(DownloadResourceResultStatus.Cancelled));
}
catch (Exception ex) when((
(ex is IOException && ex.InnerException is SocketException) ||
ex is TimeoutException) &&
i < 2)
{
string message = string.Format(CultureInfo.CurrentCulture, Strings.Log_ErrorDownloading, identity, uri)
+ Environment.NewLine
+ ExceptionUtilities.DisplayMessage(ex);
logger.LogWarning(message);
}
catch (Exception ex)
{
string message = string.Format(CultureInfo.CurrentCulture, Strings.Log_ErrorDownloading, identity, uri);
logger.LogError(message + Environment.NewLine + ExceptionUtilities.DisplayMessage(ex));
throw new FatalProtocolException(message, ex);
}
}
throw new InvalidOperationException("Reached an unexpected point in the code");
}