While I'm sure the title could be improved for clarity, my meaning is thus:
When fetching a URL for a file download at
URLs don't necessarily correspond to actual directories on the server. Ultimately the path component of a URL is just a name; the server can translate that name to whatever it wants on the back end.
In this case it seems likely that
/dir1/dir2/ is a directory on the server, but even so that doesn't mean anything. The server knows about a resource named
/dir1/dir2/file.zip, but doesn't know anything about a resource named