Nachtrag: Das DownloadAndIgnoreCache (resp. DLCTL_PRAGMA_NO_CACHE) gilt nur für Dateien.
Zitat:
DLCTL_RESYNCHRONIZE and DLCTL_PRAGMA_NO_CACHE: These flags cause cache
refreshes. With DLCTL_RESYNCHRONIZE, the server will be asked for update
status. Cached files will be used if the server indicates that the cached
information is up-to-date. With DLCTL_PRAGMA_NO_CACHE, files will be
re-downloaded from the server regardless of the update status of the files.