NHentai .webp Image Format Unsupported

[Eliolocin]

Bug description

Nhentai.net submissions lately now include .webp galleries, which Grabber currently cannot handle (it only handles .png, .gif, and .jpg formats). Images from these galleries that are .webp cannot be loaded or downloaded by Grabber. Logs show that Grabber attempts to resolve this by changing the extension to .jpg which still fails.

Steps to reproduce

1. Open Grabber
2. Make a Search Query using Nhentai.net
3. Galleries that are .webp will appear in the results and can be opened but their images will not load, including the thumbnail. Downloading these galleries also does not work.

Expected behavior

.webp Galleries should also be handled by Grabber the same way as other image extensions.

Context

Error Log Snippet of Grabber trying to load gallery thumbnails with unsupported (.webp) format by replacing its extension with .jpg instead:

[12:10:00.007][Info] [nhentai.net][Json] Receiving page https://nhentai.net/api/galleries/search?page=1&sort=date&query=japanese
[12:10:00.014][Info] [nhentai.net][Json] Parsed page https://nhentai.net/api/galleries/search?page=1&sort=date&query=japanese: 25 images (25), 0 tags (167), -1 total (278650), 11146 pages (11146)
[12:10:02.075][Warning] Error loading thumbnail (Error transferring https://t.nhentai.net/galleries/3117280/thumb.undefined - server replied: ), new try with extension JPG
[12:10:02.075][Warning] Error loading thumbnail (Error transferring https://t.nhentai.net/galleries/3117322/thumb.undefined - server replied: ), new try with extension JPG
[12:10:02.075][Warning] Error loading thumbnail (Error transferring https://t.nhentai.net/galleries/3117329/thumb.undefined - server replied: ), new try with extension JPG
[12:10:03.117][Error] Error loading thumbnail (Error transferring https://t.nhentai.net/galleries/3117280/thumb.jpg - server replied: )
[12:10:03.118][Error] Error loading thumbnail (Error transferring https://t.nhentai.net/galleries/3117322/thumb.jpg - server replied: )
[12:10:03.120][Error] Error loading thumbnail (Error transferring https://t.nhentai.net/galleries/3117329/thumb.jpg - server replied: )

System information

• OS: Windows 11
• Grabber version: 7.12.2 (x64)