New works on nhentai are 404'ing

[hmmmmyesfloor]

This isn't just an issue with gallery-dl because other downloaders are throwing invalids etc. I think I saw elsewhere that the reason for this was changing the file format on the site to .webp? Sorry i dont really use github so idk how this is supposed to work

[Hrxn]

Which version of gallery-dl are you using?

Without posting a verbose log of the gallery-dl invocation(gallery-dl -v <URL>) no one can tell what's actually going on..

[hmmmmyesfloor]

Sorry like i said im not sure how this kinda stuff works. I'm using the latest version, 1.27.7.

gallery-dl -v https://nhentai.net/g/538775/
[gallery-dl][debug] Version 1.27.7 - Executable (stable/windows)
[gallery-dl][debug] Python 3.8.10 - Windows-10-10.0.19045
[gallery-dl][debug] requests 2.32.3 - urllib3 2.2.3
[gallery-dl][debug] Configuration Files []
[gallery-dl][debug] Starting DownloadJob for 'https://nhentai.net/g/538775/'
[nhentai][debug] Using NhentaiGalleryExtractor for 'https://nhentai.net/g/538775/'
[urllib3.connectionpool][debug] Starting new HTTPS connection (1): nhentai.net:443
[urllib3.connectionpool][debug] https://nhentai.net:443 "GET /api/gallery/538775 HTTP/11" 200 None
[urllib3.connectionpool][debug] Starting new HTTPS connection (1): i.nhentai.net:443
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/1.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/1.jpg'
[download][error] Failed to download nhentai_538775_001.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/2.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/2.jpg'
[download][error] Failed to download nhentai_538775_002.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/3.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/3.jpg'
[download][error] Failed to download nhentai_538775_003.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/4.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/4.jpg'
[download][error] Failed to download nhentai_538775_004.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/5.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/5.jpg'
[download][error] Failed to download nhentai_538775_005.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/6.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/6.jpg'
[download][error] Failed to download nhentai_538775_006.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/7.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/7.jpg'
[download][error] Failed to download nhentai_538775_007.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/8.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/8.jpg'
[download][error] Failed to download nhentai_538775_008.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/9.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/9.jpg'
[download][error] Failed to download nhentai_538775_009.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/10.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/10.jpg'
[download][error] Failed to download nhentai_538775_010.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/11.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/11.jpg'
[download][error] Failed to download nhentai_538775_011.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/12.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/12.jpg'
[download][error] Failed to download nhentai_538775_012.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/13.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/13.jpg'
[download][error] Failed to download nhentai_538775_013.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/14.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/14.jpg'
[download][error] Failed to download nhentai_538775_014.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/15.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/15.jpg'
[download][error] Failed to download nhentai_538775_015.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/16.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/16.jpg'
[download][error] Failed to download nhentai_538775_016.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/17.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/17.jpg'
[download][error] Failed to download nhentai_538775_017.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/18.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/18.jpg'
[download][error] Failed to download nhentai_538775_018.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/19.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/19.jpg'
[download][error] Failed to download nhentai_538775_019.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/20.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/20.jpg'
[download][error] Failed to download nhentai_538775_020.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/21.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/21.jpg'
[download][error] Failed to download nhentai_538775_021.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/22.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/22.jpg'
[download][error] Failed to download nhentai_538775_022.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/23.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/23.jpg'
[download][error] Failed to download nhentai_538775_023.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/24.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/24.jpg'
[download][error] Failed to download nhentai_538775_024.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/25.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/25.jpg'
[download][error] Failed to download nhentai_538775_025.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/26.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/26.jpg'
[download][error] Failed to download nhentai_538775_026.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/27.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/27.jpg'
[download][error] Failed to download nhentai_538775_027.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/28.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/28.jpg'
[download][error] Failed to download nhentai_538775_028.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/29.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/29.jpg'
[download][error] Failed to download nhentai_538775_029.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/30.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/30.jpg'
[download][error] Failed to download nhentai_538775_030.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/31.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/31.jpg'
[download][error] Failed to download nhentai_538775_031.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/32.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/32.jpg'
[download][error] Failed to download nhentai_538775_032.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/33.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/33.jpg'
[download][error] Failed to download nhentai_538775_033.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/34.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/34.jpg'
[download][error] Failed to download nhentai_538775_034.jpg
[urllib3.connectionpool][debug] Resetting dropped connection: i.nhentai.net
[urllib3.connectionpool][debug] https://i.nhentai.net:443 "GET /galleries/3120944/35.jpg HTTP/11" 404 146
[downloader.http][warning] '404 Not Found' for 'https://i.nhentai.net/galleries/3120944/35.jpg'
[download][error] Failed to download nhentai_538775_035.jpg

[mikf]

Duplicate of #6442

[mikf]

[gallery-dl][debug] Version 1.27.7 - Executable (stable/windows)

Run gallery-dl --update-to dev. It should work after that.

[paolovinoya]

pip package files don't appear to have the updated code to include webp files yet.

Notice line 64 on your file:

cat nhentai.py | head -64 | tail -1
        extdict = {"j": "jpg", "p": "png", "g": "gif"}

If you're in a hurry, you can just edit the file to include it as per reference to Commit 1ddbcda, until the commit is finalized.
Add the webp json definition with:

$ cat nhentai.py | head -64 | tail -1
        extdict = {"j": "jpg", "p": "png", "g": "gif", "w": "webp"}

[mikf]

Or you use the following to install from master, which includes the fix in 1ddbcda:

python3 -m pip install -U --force-reinstall https://github.com/mikf/gallery-dl/archive/master.tar.gz