private XmlSitemapProvider[] CreateProviders(XmlSitemapBuildContext context)
{
return(_publishers
.Select(x => x.Value.PublishXmlSitemap(context))
.Where(x => x != null)
.OrderBy(x => x.Order)
.ToArray());
}
public async Task Run(TaskExecutionContext ctx, CancellationToken cancelToken = default)
{
var stores = _storeContext.GetAllStores();
foreach (var store in stores)
{
var languages = _languageService.GetAllLanguages(false, store.Id);
var buildContext = new XmlSitemapBuildContext(store, languages.ToArray(), _settingFactory, _storeContext.IsSingleStoreMode())
{
CancellationToken = cancelToken,
ProgressCallback = OnProgress
};
await _generator.RebuildAsync(buildContext);
}
Task OnProgress(int value, int max, string msg)
{
return(ctx.SetProgressAsync(value, max, msg, true));
}
}
protected virtual Task ProcessCustomNodesAsync(XmlSitemapBuildContext ctx, Multimap <int, XmlSitemapNode> sitemaps)
{
// For inheritors
return(Task.CompletedTask);
}
public virtual async Task RebuildAsync(XmlSitemapBuildContext ctx)
{
Guard.NotNull(ctx, nameof(ctx));
// TODO: (core) Check later if this is still necessary
//var dataTokens = _httpContextAccessor.HttpContext?.GetRouteData()?.DataTokens;
//if (dataTokens != null)
//{
// // Double seo code otherwise
// dataTokens["CultureCodeReplacement"] = string.Empty;
//}
var languageData = new Dictionary <int, LanguageData>();
foreach (var language in ctx.Languages)
{
var lockFilePath = GetLockFilePath(ctx.Store.Id, language.Id);
if (_lockFileManager.TryAcquireLock(lockFilePath, out var lockFile))
{
// Process only languages that are unlocked right now
// It is possible that an HTTP request triggered the generation
// of a language specific sitemap.
try
{
var sitemapDir = BuildSitemapDirPath(ctx.Store.Id, language.Id);
var data = new LanguageData
{
Store = ctx.Store,
Language = language,
LockFile = lockFile,
LockFilePath = lockFilePath,
TempDir = sitemapDir + "~",
FinalDir = sitemapDir,
BaseUrl = await BuildBaseUrlAsync(ctx.Store, language)
};
_tenantRoot.TryDeleteDirectory(data.TempDir);
_tenantRoot.TryCreateDirectory(data.TempDir);
languageData[language.Id] = data;
}
catch
{
await lockFile.ReleaseAsync();
throw;
}
}
}
if (languageData.Count == 0)
{
Logger.Warn("XML sitemap rebuild already in process.");
return;
}
var languages = languageData.Values.Select(x => x.Language);
var languageIds = languages.Select(x => x.Id).Concat(new[] { 0 }).ToArray();
// All sitemaps grouped by language
var sitemaps = new Multimap <int, XmlSitemapNode>();
var compositeFileLock = new AsyncActionDisposable(async() =>
{
foreach (var data in languageData.Values)
{
await data.LockFile.ReleaseAsync();
}
});
await using (compositeFileLock)
{
// Impersonate
var prevCustomer = _services.WorkContext.CurrentCustomer;
// no need to vary xml sitemap by customer roles: it's relevant to crawlers only.
// TODO: (core) Do not attempt to update CurrentCustomer entity if it is untracked (determine where applicable)
_services.WorkContext.CurrentCustomer = (await _customerService.GetCustomerBySystemNameAsync(SystemCustomerNames.SearchEngine, false)) ?? prevCustomer;
try
{
var nodes = new List <XmlSitemapNode>();
var providers = CreateProviders(ctx);
var total = (await providers.SelectAsync(x => x.GetTotalCountAsync()).ToListAsync(ctx.CancellationToken)).Sum();
var totalSegments = (int)Math.Ceiling(total / (double)MaximumSiteMapNodeCount);
var hasIndex = totalSegments > 1;
var indexNodes = new Multimap <int, XmlSitemapNode>();
var segment = 0;
var numProcessed = 0;
CheckSitemapCount(totalSegments);
using (new DbContextScope(_db, autoDetectChanges: false, forceNoTracking: true, lazyLoading: false))
{
var entities = EnlistEntitiesAsync(providers);
await foreach (var batch in entities.SliceAsync(ctx.CancellationToken, MaximumSiteMapNodeCount))
{
if (ctx.CancellationToken.IsCancellationRequested)
{
break;
}
segment++;
numProcessed = segment * MaximumSiteMapNodeCount;
ctx.ProgressCallback?.Invoke(numProcessed, total, "{0} / {1}".FormatCurrent(numProcessed, total));
var slugs = await GetUrlRecordCollectionsForBatchAsync(batch.Select(x => x.Entry).ToList(), languageIds);
foreach (var data in languageData.Values)
{
var language = data.Language;
var baseUrl = data.BaseUrl;
// Create all node entries for this segment
var entries = batch
.Where(x => x.Entry.LanguageId.GetValueOrDefault() == 0 || x.Entry.LanguageId.Value == language.Id)
.Select(x => x.Provider.CreateNode(_linkGenerator, baseUrl, x.Entry, slugs[x.Entry.EntityName], language));
sitemaps[language.Id].AddRange(entries.Where(x => x != null));
// Create index node for this segment/language combination
if (hasIndex)
{
indexNodes[language.Id].Add(new XmlSitemapNode
{
LastMod = sitemaps[language.Id].Select(x => x.LastMod).Where(x => x.HasValue).DefaultIfEmpty().Max(),
Loc = GetSitemapIndexUrl(segment, baseUrl),
});
}
if (segment % 5 == 0 || segment == totalSegments)
{
// Commit every 5th segment (10.000 nodes) temporarily to disk to minimize RAM usage
var documents = GetSiteMapDocuments((IReadOnlyCollection <XmlSitemapNode>)sitemaps[language.Id]);
await SaveTempAsync(documents, data, segment - documents.Count + (hasIndex ? 1 : 0));
documents.Clear();
sitemaps.RemoveAll(language.Id);
}
}
slugs.Clear();
}
// Process custom nodes
if (!ctx.CancellationToken.IsCancellationRequested)
{
ctx.ProgressCallback?.Invoke(numProcessed, total, "Processing custom nodes".FormatCurrent(numProcessed, total));
await ProcessCustomNodesAsync(ctx, sitemaps);
foreach (var data in languageData.Values)
{
if (sitemaps.ContainsKey(data.Language.Id) && sitemaps[data.Language.Id].Count > 0)
{
var documents = GetSiteMapDocuments((IReadOnlyCollection <XmlSitemapNode>)sitemaps[data.Language.Id]);
await SaveTempAsync(documents, data, (segment + 1) - documents.Count + (hasIndex ? 1 : 0));
}
else if (segment == 0)
{
// Ensure that at least one entry exists. Otherwise,
// the system will try to rebuild again.
var homeNode = new XmlSitemapNode {
LastMod = DateTime.UtcNow, Loc = data.BaseUrl
};
var documents = GetSiteMapDocuments(new List <XmlSitemapNode> {
homeNode
});
await SaveTempAsync(documents, data, 0);
}
}
}
}
ctx.CancellationToken.ThrowIfCancellationRequested();
ctx.ProgressCallback?.Invoke(totalSegments, totalSegments, "Finalizing...'");
foreach (var data in languageData.Values)
{
// Create index documents (if any)
if (hasIndex && indexNodes.Any())
{
var indexDocument = CreateSitemapIndexDocument(indexNodes[data.Language.Id]);
await SaveTempAsync(new List <string> {
indexDocument
}, data, 0);
}
// Save finally (actually renames temp folder)
await SaveFinalAsync(data);
}
}
finally
{
// Undo impersonation
_services.WorkContext.CurrentCustomer = prevCustomer;
sitemaps.Clear();
foreach (var data in languageData.Values)
{
if (_tenantRoot.DirectoryExists(data.TempDir))
{
_tenantRoot.TryDeleteDirectory(data.TempDir);
}
}
}
}
}
private async Task <XmlSitemapPartition> GetSitemapPartAsync(int index, bool isRetry)
{
Guard.NotNegative(index, nameof(index));
var store = _services.StoreContext.CurrentStore;
var language = _services.WorkContext.WorkingLanguage;
var exists = TryGetSitemapFile(store.Id, language.Id, index, out var file);
if (exists)
{
return(new XmlSitemapPartition
{
Index = index,
Name = file.Name,
LanguageId = language.Id,
StoreId = store.Id,
ModifiedOnUtc = file.LastModified.UtcDateTime,
Stream = file.OpenRead()
});
}
if (isRetry)
{
var msg = "Could not generate XML sitemap. Index: {0}, Date: {1}".FormatInvariant(index, DateTime.UtcNow);
Logger.Error(msg);
throw new SmartException(msg);
}
if (index > 0)
{
// File with index greater 0 has been requested, but it does not exist.
// Now we have to determine whether just the passed index is out of range
// or the files have never been created before.
// If the main file (index 0) exists, the action should return NotFoundResult,
// otherwise the rebuild process should be started or waited for.
if (TryGetSitemapFile(store.Id, language.Id, 0, out file))
{
throw new IndexOutOfRangeException("The sitemap file '{0}' does not exist.".FormatInvariant(file.Name));
}
}
// The main sitemap document with index 0 does not exist, meaning: the whole sitemap
// needs to be created and cached by partitions.
var wasRebuilding = false;
var lockFilePath = GetLockFilePath(store.Id, language.Id);
while (await IsRebuildingAsync(lockFilePath))
{
// The rebuild process is already running, either started
// by the task scheduler or another HTTP request.
// We should wait for completion.
wasRebuilding = true;
await Task.Delay(1000);
}
if (!wasRebuilding)
{
// No lock. Rebuild now.
var buildContext = new XmlSitemapBuildContext(store, new[] { language }, _services.SettingFactory, _services.StoreContext.IsSingleStoreMode())
{
CancellationToken = _asyncRunner.AppShutdownCancellationToken
};
await RebuildAsync(buildContext);
}
// DRY: call self to get sitemap partition object
return(await GetSitemapPartAsync(index, true));
}
