[deviantart] KeyError - 'files'

[kattjevfel]

Afaik this is not covered by #488, feel free to close if it is.

~ » gallery-dl --verbose https://www.deviantart.com/zemotion/art/shirotsuki-85835672
[gallery-dl][debug] Version 1.11.2-dev
[gallery-dl][debug] Python 3.8.0 - Linux-5.4.1-arch1-1-fsync-x86_64-with-glibc2.2.5
[gallery-dl][debug] requests 2.22.0 - urllib3 1.25.7
[gallery-dl][debug] Starting DownloadJob for 'https://www.deviantart.com/zemotion/art/shirotsuki-85835672'
[gallery-dl][debug] Updating urllib3 ciphers
[deviantart][debug] Using default API credentials (client-id 5388)
[deviantart][debug] Using DeviantartDeviationExtractor for 'https://www.deviantart.com/zemotion/art/shirotsuki-85835672'
[urllib3.connectionpool][debug] Starting new HTTPS connection (1): www.deviantart.com:443
[urllib3.connectionpool][debug] https://www.deviantart.com:443 "GET /_napi/da-browse/shared_api/deviation/extended_fetch?deviationid=85835672&username=zemotion&type=art&include_session=false HTTP/1.1" 200 None
[deviantart][error] An unexpected error occurred: KeyError - 'files'. Please run gallery-dl again with the --verbose flag, copy its output and report this issue on https://github.com/mikf/gallery-dl/issues .
[deviantart][debug] 
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/gallery_dl/job.py", line 48, in run
    for msg in self.extractor:
  File "/usr/lib/python3.8/site-packages/gallery_dl/extractor/deviantart.py", line 630, in items
    deviation = self._extract(data)
  File "/usr/lib/python3.8/site-packages/gallery_dl/extractor/deviantart.py", line 643, in _extract
    files = deviation["files"]
KeyError: 'files'
~ » gallery-dl -k https://www.deviantart.com/zemotion/art/shirotsuki-85835672       
usage: gallery-dl [OPTION]... URL...
gallery-dl: error: unrecognized arguments: -k
~ » gallery-dl -K https://twitter.com/mochipaipai/status/1189670070290546688                         
~ » gallery-dl -K https://www.deviantart.com/zemotion/art/shirotsuki-85835672
[deviantart][error] An unexpected error occurred: KeyError - 'files'. Please run gallery-dl again with the --verbose flag, copy its output and report this issue on https://github.com/mikf/gallery-dl/issues .

[Twi-Hard]

This wasn't happening to me after issue #488 came up but now it is so it's new.

[mikf]

The results of /shared_api/deviation/extended_fetch got changed.

There is now "media" field with all the components to build image URLs out of,
and the list of complete file URLs called "files" is gone.