Serving files from Slivka

[warownia1]

We need to find a way to serve created data files from the server that will not cause the entire system to block. Serving files by Slivka app make one thread unavailable for further request processing while the file is being downloaded.

[warownia1]

Two distinct endpoints can be created for uploading/listing files e.g. /files or /tasks/{id}/files and for downloading file contents e.g. /media.
Content will be served by web server (Apache) while other operation are done by application server (uwsgi/gunicorn).
Caveat! Output files must be copied/linked to the media directory to be accessible.

[warownia1]

Setting Flask.config['USE_X_SENDFILE'] = True makes flask.send_file add X-Sendfile header to be handled by proxy server instead of serving the file directly.

[warownia1]

Required mod_xsendfile for Apache