public static string VersionedContent(this UrlHelper helper, string contentPath)
{
var fullPath = helper.RequestContext.HttpContext.Server.MapPath(contentPath);
var version = AssetVersionCache.GetOrAddCachedVersion(fullPath, helper.RequestContext.HttpContext.Cache);
if (version != null)
{
var relativePath = helper.Content(contentPath);
// append hash to query string
return(AppendVersion(relativePath, version));
}
return(helper.Content(contentPath));
}
public static string GetOrAddCachedVersion(string filePath, Cache cache)
{
if (!File.Exists(filePath))
{
return(null);
}
var assetCache = GetOrCreateAssetCache(cache);
var version = string.Empty;
if (assetCache.ContainsKey(filePath))
{
version = assetCache[filePath];
}
else
{
version = AssetVersionCache.ComputeHash(filePath);
version = assetCache.GetOrAdd(filePath, version);
}
return(version);
}