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Once the curator submits a packet, the EAS loader will detect the packet and move it from the secure drop box file system to a secure storage file system location designated for EAS. The EAS importer picks up the packet from the secure storage file system and runs a series of processes that convert the original packet, creating a copy for further processing. Both the original packet and the converted copy are kept in the EAS secure storage file system.
The EAS importer process converts performs the following conversion routines on the email content:
- Converts email messages to the EML standard format
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- (folders of .eml message files conforming to RFC-2822).
- Converts email attachments:
- Copies external attachments.
- Extracts embedded attachments.
- File names based on message subject are converted to random alpha-numeric strings (for increased security).
- Embedded files with no file name are renamed to unknown_EAS-generated_<random number> (previously these were named <random_number>_unknown).
- Embedded files with an invalid name are renamed to EAS-substituted_<random number>.
- Writes metadata supplied by the curator to an Oracle database.
- Associates rights metadata restrictions of “Rights basis: risk assessment” and “Secure Storage required:
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- unconfirmed”.
- Stores the metadata plus extracted email message content (headers and bodies) in a Solr index on the secure storage file system.