public async Task Collect(SqlConnection connection, Uri serviceDiscoveryUri, DateTime?lastCreateTime, string fileName)
{
using (var context = new EntitiesContext(connection, readOnly: true))
using (var cursor = new FileCursor(CursorFileName))
using (var logger = new Logger(ErrorsFileName))
{
context.SetCommandTimeout(300); // large query
var startTime = await cursor.Read();
logger.Log($"Starting metadata collection - Cursor time: {startTime:u}");
var repository = new EntityRepository <Package>(context);
var packages = repository.GetAll()
.Include(p => p.PackageRegistration);
if (QueryIncludes != null)
{
packages = packages.Include(QueryIncludes);
}
packages = packages
.Where(p => p.Created <lastCreateTime && p.Created> startTime)
.Where(p => p.PackageStatusKey == PackageStatus.Available)
.OrderBy(p => p.Created);
if (LimitTo > 0)
{
packages = packages.Take(LimitTo);
}
var flatContainerUri = await GetFlatContainerUri(serviceDiscoveryUri);
using (var csv = CreateCsvWriter(fileName))
using (var http = new HttpClient())
{
// We want these downloads ignored by stats pipelines - this user agent is automatically skipped.
// See https://github.com/NuGet/NuGet.Jobs/blob/262da48ed05d0366613bbf1c54f47879aad96dcd/src/Stats.ImportAzureCdnStatistics/StatisticsParser.cs#L41
http.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent",
"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; AppInsights) Backfill Job: NuGet.Gallery GalleryTools");
var counter = 0;
var lastCreatedDate = default(DateTime?);
foreach (var package in packages)
{
var id = package.PackageRegistration.Id;
var version = package.NormalizedVersion;
var idLowered = id.ToLowerInvariant();
var versionLowered = version.ToLowerInvariant();
try
{
var metadata = default(TMetadata);
var nuspecUri =
$"{flatContainerUri}/{idLowered}/{versionLowered}/{idLowered}.nuspec";
using (var nuspecStream = await http.GetStreamAsync(nuspecUri))
{
var document = LoadDocument(nuspecStream);
var nuspecReader = new NuspecReader(document);
if (SourceType == MetadataSourceType.NuspecOnly)
{
metadata = ReadMetadata(nuspecReader);
}
else if (SourceType == MetadataSourceType.Nupkg)
{
var nupkgUri =
$"{flatContainerUri}/{idLowered}/{versionLowered}/{idLowered}.{versionLowered}.nupkg";
metadata = await FetchMetadataAsync(http, nupkgUri, nuspecReader, id, version, logger);
}
}
if (ShouldWriteMetadata(metadata))
{
var record = new PackageMetadata(id, version, metadata, package.Created);
csv.WriteRecord(record);
await csv.NextRecordAsync();
logger.LogPackage(id, version, $"Metadata saved");
}
}
catch (Exception e)
{
await logger.LogPackageError(id, version, e);
}
counter++;
if (!lastCreatedDate.HasValue || lastCreatedDate < package.Created)
{
lastCreatedDate = package.Created;
}
if (counter >= CollectBatchSize)
{
logger.Log($"Writing {package.Created:u} to cursor...");
await cursor.Write(package.Created);
counter = 0;
}
}
if (counter > 0 && lastCreatedDate.HasValue)
{
await cursor.Write(lastCreatedDate.Value);
}
}
}
}
