private IDictionary<string, string> GetPackageMetadata(PackageVersion version)
{
var path = _nupkgDownloader.GetPackagePath(version);
using (var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
{
var errors = new List<string>();
var metadata = NupkgPackageMetadataExtraction.MakePackageMetadata(fileStream, errors);
if (errors.Any())
{
throw new InvalidOperationException(
$"NuGet package for '{version.Id}' (version '{version.Version}') could not be read for metadata. " +
$"Errors: {string.Join(", ", errors)}");
}
metadata["listed"] = version.Listed.ToString().ToLowerInvariant();
return metadata;
}
}
private async Task DownloadPackageAsync(PackageVersion version)
{
var path = GetPackagePath(version);
if (File.Exists(path))
{
return;
}
// download the package
if (_packageBaseAddress == null)
{
_packageBaseAddress = await GetPackageBaseAddressAsync();
}
string relativeUri = $"{version.Id}/{version.Version}/{version.Id}.{version.Version}.nupkg".ToLower();
var requestUri = new Uri(new Uri(_packageBaseAddress, UriKind.Absolute), relativeUri);
var response = await _client.GetAsync(requestUri);
if (response.StatusCode != HttpStatusCode.OK)
{
throw new InvalidOperationException($"HTTP {(int)response.StatusCode} {response.ReasonPhrase} was encountered when fetching package '{version.Id}' (version '{version.Version}').");
}
var packageStream = await response.Content.ReadAsStreamAsync();
// get or initialize the package lock
SemaphoreSlim packageLock;
lock (Lock)
{
if (!PackageLocks.TryGetValue(path, out packageLock))
{
packageLock = new SemaphoreSlim(1);
PackageLocks[path] = packageLock;
}
}
// get a lock and write the package to disk
var acquired = await packageLock.WaitAsync(TimeSpan.FromSeconds(30));
if (!acquired)
{
throw new InvalidOperationException($"Could not get a lock to write the package '{version.Id}' (version '{version.Version}') to '{path}'.");
}
try
{
if (!File.Exists(path))
{
using (var fileStream = new FileStream(path, FileMode.Create, FileAccess.Write))
{
await packageStream.CopyToAsync(fileStream);
}
}
}
catch (IOException)
{
// an IOException is thrown when another thread already downloaded this package
}
finally
{
packageLock.Release();
}
}
public string GetPackagePath(PackageVersion version)
{
return Path.Combine(_settings.PackageDirectory, $"{version.Id}.{version.Version}.nupkg".ToLower());
}
private async Task DownloadPackageAsync(PackageVersion version)
{
var path = GetPackagePath(version);
if (File.Exists(path))
{
return;
}
// download the package
if (_packageBaseAddress == null)
{
_packageBaseAddress = await GetPackageBaseAddressAsync();
}
string relativeUri = $"{version.Id}/{version.Version}/{version.Id}.{version.Version}.nupkg".ToLower();
var requestUri = new Uri(new Uri(_packageBaseAddress, UriKind.Absolute), relativeUri);
var response = await _client.GetAsync(requestUri);
if (response.StatusCode != HttpStatusCode.OK)
{
throw new InvalidOperationException($"HTTP {(int)response.StatusCode} {response.ReasonPhrase} was encountered when fetching package '{version.Id}' (version '{version.Version}').");
}
var packageStream = await response.Content.ReadAsStreamAsync();
// get or initialize the package lock
SemaphoreSlim packageLock;
lock (Lock)
{
if (!PackageLocks.TryGetValue(path, out packageLock))
{
packageLock = new SemaphoreSlim(1);
PackageLocks[path] = packageLock;
}
}
// get a lock and write the package to disk
var acquired = await packageLock.WaitAsync(TimeSpan.FromSeconds(30));
if (!acquired)
{
throw new InvalidOperationException($"Could not get a lock to write the package '{version.Id}' (version '{version.Version}') to '{path}'.");
}
try
{
if (!File.Exists(path))
{
using (var fileStream = new FileStream(path, FileMode.Create, FileAccess.Write))
{
await packageStream.CopyToAsync(fileStream);
}
}
}
catch (IOException)
{
// an IOException is thrown when another thread already downloaded this package
}
finally
{
packageLock.Release();
}
}
public string GetPackagePath(PackageVersion version)
{
return(Path.Combine(_settings.PackageDirectory, $"{version.Id}.{version.Version}.nupkg".ToLower()));
}