private string AppendFileChecksum(string filePath)
{
var fullFilePath = _httpCtx.Server.MapPath(filePath);
if (_memoryCacheService.Get <FileSystemWatcherBase>(fullFilePath + "-fsw") == null)
{
// Ensure a file system watcher exists
var fsw = _fswSvc.CreateFileSystemWatcher(fullFilePath);
fsw.NotifyFilter = NotifyFilters.LastWrite;
fsw.Changed += new FileSystemEventHandler(OnFileCreatedOrChanged);
_memoryCacheService.Default[fullFilePath + "-fsw"] = fsw;
}
// Get or update
return((string)(_memoryCacheService.Default[fullFilePath]
?? (_memoryCacheService.Default[fullFilePath] = CalculateFileHash(fullFilePath))));
}
