hpr_documentation/workflow/directory-structure.md

File Structure

We receive random files from random people on the Internet, so are treated with extreme care.

The HPR Database is used to track the status of each show as it is been processed, using a normally hidden table reservations. It is not publicly available as it contains the IP address of the host uploading the show as a security measure. Once the show is processed the IP address is removed from the table.

Information about the show process is available to the Janitors via stats.php.

A cron job */15 * * * * /home/hpr/bin/update-stats.bash > /dev/null 2>&1 runs every 15 minutes and saves the file to https://hub.hackerpublicradio.org/stats.json for anyone to use.

Input Directory Structure

The files are never processed by the front end HPR servers, and so all processing is done offline.

The files are downloaded by trusted Janitors that have the ability to scp/rsync the files from the HPR to a local machine for processing.

The directory structure is based on a combination of fields separated by the underscore (_) delimiter.

• Upload date and time UTC_TIMESTAMP() at reservation time.
• The requested episode number or 9999 if the reserve queue is to be used.
• The requested epidode date or 970-01-01 if the reserve queue is to be used.
• The random unique key for this request.

2339594445_9278_2044-02-24_aeb0579fcac318005d7550a60fd60403676c24d94148b
2339680845_9999_1970-01-01_4bd713699e5bc0978d5fef85a60f09bc7f70ef3488624

Shows destined for the reserve queue are moved to from the upload directory and placed the reserve directory using the script rename-reserve.bash.

It checks to see if a url to the show was provide, and attempts to download the file.

It renames the directory structure based on a combination of fields separated by the underscore (_) delimiter.

• Upload date and time UTC_TIMESTAMP() at reservation time.
• The hosts.hostid of the host.
• The random unique key for this request.
• The host name hosts.host of the host.
• The spaces replaced with underscore title of the episode.

When new hosts submit a show directly to the reserve queue, the Janitors will repost it to the first available slot in the normal queue.

2339680845_987_4bd713699e5bc0978d5fef85a60f09bc7f70ef3488624_Emperor_Ming_Top_tips_for_time_travel

Output Directory Structure

It should be possible to post the entire backlog to someone and have them plug it in and for any media player be able to play it. Each episode has it's own "album" which corresponds to a directory. The directory structure is kept as flat as possible with everything related to show 9876 in a single directory hpr9876. This is the least common denominator, and in no way precludes web services, or other applications.

We do however need to support other functionality so the Episodes are kept inside of the eps directory, the Hosts are in hosts/, and Series are in series/.

Layers

We get files from different locations. The source files are delivered by the hosts, some are generated by processing, and others are added by the Janitors that cleanup the show notes.

All these are combined and end up as a complete entity, on one of the HPR Origin servers.

From there is delivered made available via RSS, etc.