StillImageRepresentation uploaded by knora-xml-import cannot be displayed in Salsah 1.5

[mrivoal]

Using knora on develop and running the knora-xml-import script with images as described in the doc results in an error in Salsah 1.5 and Knora API.

If a resource is a subclass of knora-base:StillImageRepresentation, even though the import with knora-xml-import went smoothly, I cannot display the resource at all. I got a 500 Internal Server Error and if a try to display the resource in the API (using http://0.0.0.0:3333/v1/resources/http%3A%2F%2Frdfh.ch%2F00FE%2FuYkYMpHoRfe7O29TPBb-BA), then I got the following error:

{"status":4,"error":"org.knora.webapi.InconsistentTriplestoreDataException: Unknown MIME type: image/jpx"}

But I can display without any problem a resource if it is not a a subclass of knora-base:StillImageRepresentation.

It can be easily reproduced using the test-data.xml.

[mrivoal]

@lrosenth could you maybe have a look at this? (not very urgent though, but I'm planning to use the library for a full data import which will include images.)

[subotic]

Could you maybe try the same thing with https://github.com/dasch-swiss/knora-api/releases/tag/v10.1.1 and not develop?

After this commit, there where some changes involving Knora-Sipi integration. It would be good to know if this issue was introduced recently or if it was there for a longer time.

[subotic]

And thanks for reporting :-)

[mrivoal]

You were right. With this version of Knora, I am able to display a StillImageRepresentation.

[subotic]

So the question is, was a bug introduced in knora-api or a breaking change requiring changes to knora-py?

[subotic]

@benjamingeer @tobiasschweizer could you maybe take a look at this issue? In recent commits of knora-api there was either a bug introduced or a breaking change.

[subotic]

What happens if you access the resource with v2?: http://0.0.0.0:3333/v2/resources/http%3A%2F%2Frdfh.ch%2F00FE%2FuYkYMpHoRfe7O29TPBb-BA

[tobiasschweizer]

I guess v2 allows for MIME types that v1 does not support:

https://github.com/dasch-swiss/knora-api/blob/4dad1d788c15a21c2d04bc2f14fc0081e638137a/webapi/src/main/scala/org/knora/webapi/responders/v1/ValueUtilV1.scala#L104-L125

image/jpx is not listed, only image/jp2.

[tobiasschweizer]

Maybe image/jpx could simply be added: see https://en.wikipedia.org/wiki/JPEG_2000, https://tools.ietf.org/html/rfc3745

[benjamingeer]

I think I had this problem too, and I solved it this way:

https://github.com/dasch-swiss/knora-api/pull/1233/files#diff-902f74f03286363fd8a94360df6c4753R109

[mrivoal]

@subotic I have finally tested the /v2/resources route on develop. I get to see the complete description of the resource if I use this route instead of v1.

[loicjaouen]

@benjamingeer so PR #1233 solves this issue? it should be in a coming release of knora-api, shouldn't it?

[benjamingeer]

@loicjaouen I don't know, I haven't looked at this issue myself. dasch-swiss/dsp-api#1233 is waiting for dasch-swiss/sipi#309.

[tobiasschweizer]

If you need that urgently, why don't you just add the missing mimetype as suggested in #21 (comment)?