FTP when accessing UNC thumbnail

[WorldEntityGravity]

Steps to reproduce

1. Use a UNC path for a library
2. Place a "folder.jpg" or "cover.jpg" thumbnail file in a series folder in the library
3. Update library / Analyze the series

Expected behavior

Komga should use a normal file transfer protocol when accessing thumbnails, like SMB or similar.

Actual behavior

It looks like Komga attempts to use FTP to access the thumbnail and in my case the NAS blocked the Komga server due to too many incorrect logins resulting in the entire media server crashing, fun times.

Logs

2023-10-30T14:11:12.459+01:00 ERROR 13824 --- [taskProcessor-1] o.g.k.domain.service.ThumbnailLifecycle  : Could not fix thumbnail: ThumbnailSeries(thumbnail=null, url=file://192.168.X.X/Media/Comics/Mousou%20Telepathy/Cover.jpg, selected=true, type=SIDECAR, mediaType=, fileSize=0, dimension=Dimension(width=0, height=0), id=0E1XXG5PG6FGK, seriesId=05J6N7P8AHZEC, createdDate=2023-10-29T21:35:24, lastModifiedDate=2023-10-29T21:35:24)
sun.net.ftp.FtpLoginException: Invalid username/password
	at java.base/sun.net.www.protocol.ftp.FtpURLConnection.connect(FtpURLConnection.java:335) ~[na:na]
	at java.base/sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:420) ~[na:na]
	at java.base/java.net.URL.openStream(URL.java:1317) ~[na:na]
	at org.gotson.komga.domain.service.ThumbnailLifecycle.getMetadata(ThumbnailLifecycle.kt:154) ~[classes!/:1.6.4]
	at org.gotson.komga.domain.service.ThumbnailLifecycle.access$getMetadata(ThumbnailLifecycle.kt:26) ~[classes!/:1.6.4]
	at org.gotson.komga.domain.service.ThumbnailLifecycle$fixThumbnailMetadataSeries$2.invoke(ThumbnailLifecycle.kt:72) ~[classes!/:1.6.4]
	at org.gotson.komga.domain.service.ThumbnailLifecycle$fixThumbnailMetadataSeries$2.invoke(ThumbnailLifecycle.kt:66) ~[classes!/:1.6.4]
	at org.gotson.komga.domain.service.ThumbnailLifecycle.fixThumbnailMetadata(ThumbnailLifecycle.kt:129) ~[classes!/:1.6.4]
	at org.gotson.komga.domain.service.ThumbnailLifecycle.fixThumbnailMetadataSeries(ThumbnailLifecycle.kt:66) ~[classes!/:1.6.4]
	at org.gotson.komga.domain.service.ThumbnailLifecycle.fixThumbnailsMetadata(ThumbnailLifecycle.kt:42) ~[classes!/:1.6.4]
	at org.gotson.komga.application.tasks.TaskHandler.handleTask(TaskHandler.kt:177) ~[classes!/:1.6.4]
	at org.gotson.komga.application.tasks.TaskProcessor.takeAndProcess(TaskProcessor.kt:60) ~[classes!/:1.6.4]
	at org.gotson.komga.application.tasks.TaskProcessor.processAvailableTask$lambda$2(TaskProcessor.kt:49) ~[classes!/:1.6.4]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:1623) ~[na:na]

Komga version

1.6.4 / 1.7.0

Operating system

Windows 11

Other details

Tested on both 1.6.4 and 1.7.0.

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
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• I have updated the app to the latest version.
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[github-actions]

🎉 This issue has been resolved in 1.7.1 (Release Notes)