filemanager: Fix for issue #238 large file download error in GDP mode

[Martin-Rehr]

When in GDP mode download of largefiles fails through downloadWrapper. This fix align GDP mode with non-GDP mode and serve large files without using the 'downloadWrapper'.

[jonasbardino]

The reasoning behind introducing the downloadWrapper is included in
#139
which was merged in
3766076

Basically the reworking of cat.py needs to be taken into account. By simply throwing it away I think we may e.g. again end up in the ugly case where download silently fails and produces a file with the error message in it instead of the file content.

I'm surprised that it's an issue even for the quite small files mentioned in #238 . Is it ajax blob hitting max size or how does it actually fail for such bigger files?

I don't remember if we enforce a cat size limit in production, but perhaps we should or adjust it to whatever low-enough value to force bigger downloads onto SFTP/WebDAVS if we can't fix the issue for huge files on HTTPS.

[Martin-Rehr]

The reasoning behind introducing the downloadWrapper is included in #139 which was merged in 3766076

Basically the reworking of cat.py needs to be taken into account. By simply throwing it away I think we may e.g. again end up in the ugly case where download silently fails and produces a file with the error message in it instead of the file content.

I'm surprised that it's an issue even for the quite small files mentioned in #238 . Is it ajax blob hitting max size or how does it actually fail for such bigger files?

I don't remember if we enforce a cat size limit in production, but perhaps we should or adjust it to whatever low-enough value to force bigger downloads onto SFTP/WebDAVS if we can't fix the issue for huge files on HTTPS.

ajax chokes and show an empty error, it's not 'cat.py' that fails.

It's not feasible to restrict 'cat.py' filesizes to the 'ajax' limit.