public List<dynamic> GetContents(HttpContextBase httpContext)
{
var hostKey = httpContext.GetHostKey();
var cacheKey = "__ReadOnlyFileSystemContentProvider_" + hostKey;
// todo: Verify that there is no security issue here using host this way. aka what if the host == "..\.." or something.
var contents = (List<dynamic>)httpContext.Cache.Get(cacheKey);
if (contents == null)
{
lock (_lock)
{
// two phase locking
contents = (List<dynamic>)httpContext.Cache.Get(cacheKey);
if (contents == null)
{
// The convention of this content provider is to look in the ~/App_Data/{host}/content folder for the content.
var contentVirtualPath = httpContext.GetHostDataPath("content/");
var contentPhysicalPath = httpContext.Server.MapPath(contentVirtualPath);
if (!Directory.Exists(contentPhysicalPath))
{
throw new Exception("No content found for host. Host: " + hostKey);
}
contents = this.getContents(contentPhysicalPath);
int cacheTimeoutSeconds = httpContext.GetConfigurationValue("cacheTimeoutSeconds", 0);
if (cacheTimeoutSeconds > 0)
{
// Add the contents to the cache, using all files in the app_data folder as the cache dependency. If any app_data changes, the cache will be refreshed. This may be bad for you if you put other data in the app_data folder.
httpContext.Cache.Insert(cacheKey, contents, new CacheDependency(Directory.GetDirectories(Path.Combine(contentPhysicalPath, ".."), "*", SearchOption.AllDirectories)), DateTime.UtcNow.AddSeconds(cacheTimeoutSeconds), Cache.NoSlidingExpiration);
}
}
}
}
return contents;
}
