public virtual void CacheSearchResult(string folderPath, string pattern, IEnumerable <string> result)
{
_searchCache[new SearchQuery(folderPath, pattern)] = new CachedSearchResult()
{
Result = result,
CachedAt = DateTime.Now
};
}
public virtual bool GetCachedSearchResult(string folderPath, string pattern, out CachedSearchResult result)
{
var key = new SearchQuery(folderPath, pattern);
if (_searchCache.ContainsKey(key))
{
result = _searchCache[key];
return(true);
}
result = new CachedSearchResult();
return(false);
}
public IQueryable <V2FeedPackage> Search(string searchTerm, string targetFramework, bool includePrerelease)
{
var packages = PackageRepo.GetAll()
.Include(p => p.Authors)
.Include(p => p.PackageRegistration)
.Include(p => p.PackageRegistration.Owners)
.Where(p => p.Listed);
// Check if the caller is requesting packages or calling the count operation.
bool requestingCount = HttpContext.Request.RawUrl.Contains("$count");
var isEmptySearchTerm = string.IsNullOrEmpty(searchTerm);
if ((requestingCount && isEmptySearchTerm) || isEmptySearchTerm)
{
// Fetch the cache key for the empty search query.
string cacheKey = GetCacheKeyForEmptySearchQuery(includePrerelease);
IQueryable <V2FeedPackage> searchResults;
DateTime lastModified;
var cachedObject = HttpContext.Cache.Get(cacheKey);
var currentDateTime = DateTime.UtcNow;
if (cachedObject == null && !requestingCount)
{
searchResults = SearchV2FeedCore(packages, searchTerm, targetFramework, includePrerelease, useCache: false);
lastModified = currentDateTime;
// cache the most common search query
// note: this is per instance cache
var cachedPackages = searchResults.ToList();
// don't cache empty results in case we missed any potential ODATA expressions
if (!cachedPackages.Any())
{
var cachedSearchResult = new CachedSearchResult();
cachedSearchResult.LastModified = currentDateTime;
cachedSearchResult.Packages = cachedPackages;
HttpContext.Cache.Add(
cacheKey,
cachedSearchResult,
null,
currentDateTime.AddSeconds(DEFAULT_CACHE_TIME_SECONDS_V2FEED),
Cache.NoSlidingExpiration,
CacheItemPriority.Default,
null);
}
}
else if (cachedObject == null)
{
// first hit on $count and nothing in cache yet;
// we can't cache due to the $count hijack in SearchV2FeedCore...
return(SearchV2FeedCore(packages, searchTerm, targetFramework, includePrerelease, useCache: false));
}
else
{
var cachedSearchResult = (CachedSearchResult)cachedObject;
searchResults = cachedSearchResult.Packages.AsQueryable();
lastModified = cachedSearchResult.LastModified;
}
// Clients should cache twice as long.
// This way, they won't notice differences in the short-lived per instance cache.
HttpContext.Response.Cache.SetCacheability(HttpCacheability.Public);
HttpContext.Response.Cache.SetMaxAge(TimeSpan.FromSeconds(60));
HttpContext.Response.Cache.SetExpires(currentDateTime.AddSeconds(DEFAULT_CACHE_TIME_SECONDS_V2FEED * 2));
HttpContext.Response.Cache.SetLastModified(lastModified);
HttpContext.Response.Cache.SetValidUntilExpires(true);
return(searchResults);
}
return(SearchV2FeedCore(packages, searchTerm, targetFramework, includePrerelease, useCache: true));
}
public IQueryable <V2FeedPackage> Search(string searchTerm, string targetFramework, bool includePrerelease)
{
// Handle OData-style |-separated list of frameworks.
string[] targetFrameworkList = (targetFramework ?? "").Split(new[] { '\'', '|' }, StringSplitOptions.RemoveEmptyEntries);
// For now, we'll just filter on the first one.
if (targetFrameworkList.Length > 0)
{
// Until we support multiple frameworks, we need to prefer aspnet50 over aspnetcore50.
if (targetFrameworkList.Contains("aspnet50"))
{
targetFramework = "aspnet50";
}
else
{
targetFramework = targetFrameworkList[0];
}
}
// Check if the caller is requesting packages or calling the count operation.
bool requestingCount = HttpContext.Request.RawUrl.Contains("$count");
var isEmptySearchTerm = string.IsNullOrEmpty(searchTerm);
if ((requestingCount && isEmptySearchTerm) || isEmptySearchTerm)
{
// Fetch the cache key for the empty search query.
string cacheKey = GetCacheKeyForEmptySearchQuery(targetFramework, includePrerelease);
IQueryable <V2FeedPackage> searchResults;
DateTime lastModified;
var cachedObject = HttpContext.Cache.Get(cacheKey);
var currentDateTime = DateTime.UtcNow;
if (cachedObject == null && !requestingCount)
{
searchResults = SearchV2FeedCore(searchTerm, targetFramework, includePrerelease);
lastModified = currentDateTime;
// cache the most common search query
// note: this is per instance cache
var cachedPackages = searchResults.ToList();
// don't cache empty resulsets in case we missed any potential ODATA expressions
if (!cachedPackages.Any())
{
var cachedSearchResult = new CachedSearchResult();
cachedSearchResult.LastModified = currentDateTime;
cachedSearchResult.Packages = cachedPackages;
HttpContext.Cache.Add(cacheKey, cachedSearchResult, null,
currentDateTime.AddSeconds(ServerCacheExpirationInSeconds),
Cache.NoSlidingExpiration, CacheItemPriority.Default, null);
}
}
else if (cachedObject == null)
{
// first hit on $count and nothing in cache yet;
// we can't cache due to the $count hijack in SearchV2FeedCore...
return(SearchV2FeedCore(searchTerm, targetFramework, includePrerelease));
}
else
{
var cachedSearchResult = (CachedSearchResult)cachedObject;
searchResults = cachedSearchResult.Packages.AsQueryable();
lastModified = cachedSearchResult.LastModified;
}
// Clients should cache twice as long.
// This way, they won't notice differences in the short-lived per instance cache.
HttpContext.Response.Cache.SetCacheability(HttpCacheability.Public);
HttpContext.Response.Cache.SetMaxAge(TimeSpan.FromSeconds(60));
HttpContext.Response.Cache.SetExpires(currentDateTime.AddSeconds(ServerCacheExpirationInSeconds * 2));
HttpContext.Response.Cache.SetLastModified(lastModified);
HttpContext.Response.Cache.SetValidUntilExpires(true);
return(searchResults);
}
return(SearchV2FeedCore(searchTerm, targetFramework, includePrerelease));
}
