private ViewLocationCacheResult LocatePageFromPath(string executingFilePath, string pagePath, bool isMainPage)
{
var applicationRelativePath = GetAbsolutePath(executingFilePath, pagePath);
var cacheKey = new ViewLocationCacheKey(applicationRelativePath, isMainPage);
ViewLocationCacheResult cacheResult;
if (!ViewLookupCache.TryGetValue(cacheKey, out cacheResult))
{
var expirationTokens = new HashSet<IChangeToken>();
cacheResult = CreateCacheResult(expirationTokens, applicationRelativePath, isMainPage);
var cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.SetSlidingExpiration(_cacheExpirationDuration);
foreach (var expirationToken in expirationTokens)
{
cacheEntryOptions.AddExpirationToken(expirationToken);
}
// No views were found at the specified location. Create a not found result.
if (cacheResult == null)
{
cacheResult = new ViewLocationCacheResult(new[] { applicationRelativePath });
}
cacheResult = ViewLookupCache.Set<ViewLocationCacheResult>(
cacheKey,
cacheResult,
cacheEntryOptions);
}
return cacheResult;
}
private ViewLocationCacheResult OnCacheMiss(
ViewLocationExpanderContext expanderContext,
ViewLocationCacheKey cacheKey)
{
// Only use the area view location formats if we have an area token.
IEnumerable<string> viewLocations = !string.IsNullOrEmpty(expanderContext.AreaName) ?
_options.AreaViewLocationFormats :
_options.ViewLocationFormats;
for (var i = 0; i < _options.ViewLocationExpanders.Count; i++)
{
viewLocations = _options.ViewLocationExpanders[i].ExpandViewLocations(expanderContext, viewLocations);
}
ViewLocationCacheResult cacheResult = null;
var searchedLocations = new List<string>();
var expirationTokens = new HashSet<IChangeToken>();
foreach (var location in viewLocations)
{
var path = string.Format(
CultureInfo.InvariantCulture,
location,
expanderContext.ViewName,
expanderContext.ControllerName,
expanderContext.AreaName);
cacheResult = CreateCacheResult(expirationTokens, path, expanderContext.IsMainPage);
if (cacheResult != null)
{
break;
}
searchedLocations.Add(path);
}
// No views were found at the specified location. Create a not found result.
if (cacheResult == null)
{
cacheResult = new ViewLocationCacheResult(searchedLocations);
}
var cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.SetSlidingExpiration(_cacheExpirationDuration);
foreach (var expirationToken in expirationTokens)
{
cacheEntryOptions.AddExpirationToken(expirationToken);
}
return ViewLookupCache.Set<ViewLocationCacheResult>(cacheKey, cacheResult, cacheEntryOptions);
}
private ViewEngineResult CreateViewEngineResult(ViewLocationCacheResult result, string viewName)
{
if (!result.Success)
{
return ViewEngineResult.NotFound(viewName, result.SearchedLocations);
}
var page = result.ViewEntry.PageFactory();
var viewStarts = new IRazorPage[result.ViewStartEntries.Count];
for (var i = 0; i < viewStarts.Length; i++)
{
var viewStartItem = result.ViewStartEntries[i];
viewStarts[i] = viewStartItem.PageFactory();
}
var view = new RazorView(this, _pageActivator, viewStarts, page, _htmlEncoder);
return ViewEngineResult.Found(viewName, view);
}
