Support for archive formats other than ZIPs + archives within archives

[aborel]

According to received information

• Libsafe Archive Extractor instances can act on one type in: .zip .7z .rar .tar .tar.gz .gz .tgz
• sub-archives can be handled through successive instances, operating on one file type as well.

A full general solution or an agreement on more specific requirements would be useful.

[aborel]

General solution to support any N formats with up to M nesting levels: M * N! instances would be run.
.tar.gz handled by a sequence of .gz + .tar => 720 * M successive instances. 120 if we ignore RAR, 24 if .tgz can be handled transparently with gz?

[aborel]

RAR https://rarfile.readthedocs.io/ => requires external unrar executable
tar, tar.gz, tgz: https://docs.python.org/3/library/tarfile.html

[aborel]

The app must be aligned with the preservation plans. Is it possible to define the preprocessors of a PP programmatically? Not seen in the API (v2 or v3), ex.

curl -X GET "https://acoua.epfl.ch/api/v2/preservationplans/19" -H  "accept: application/json" -H  "Authorization: Bearer XXXXXXXXXXXXXXXXX"

{
  "id": 19,
  "name": "PP_Zenodo_Manual_Import_005",
  "creation": "2023-07-05 09:10:12",
  "associatedArea": 4,
  "metadataSchema": 16,
  "metadataFilter": 11,
  "metadataParams": {
    "filterParam1": "C:\\libsafe\\conf\\Filters\\filter1001.datacite.configfile_as_param1.xslt",
    "filterParam2": "tentativeParent",
    "filterParam3": null,
    "filterParam4": null,
    "filterParam5": null
  },
  "metadataPattern": "Metadata.xml",
  "storageGroups": [
    {
      "id": 1,
      "writePriority": 0,
      "readPriority": 0
    },
    {
      "id": 2,
      "writePriority": 1,
      "readPriority": 1
    }
  ],
  "dipProfiles": [],
  "algorithms": [
    {
      "shortName": "md5",
      "isDefault": 1
    }
  ]
}

[aborel]

7z can indeed be extracted by Libsafe https://test-acoua.epfl.ch/catalog/object_details/577.0
Does the system allow several instances? It doesn't seem to work (Archive Extractor is greyed out in the 2nd preprocessor selector).