Bilder für Bibliotheks items hinzu fügen für detailed view #31

New Issue

Refactored the /download_book_cover route to process downloaded images entirely in-memory (using io.BytesIO) and save them directly to MongoDB GridFS. This eliminates the reliance on local file storage and instantly makes the image available for the frontend preview.

Security & Validation

Maintained strict SSRF protection, added 5MB chunked download limits, and enforced MIME-type validation before inserting data into the database.

Frontend Updates

Fixed Broken Image URLs

Replaced server-side Jinja syntax ({{ url_for(...) }}) inside JavaScript with reliable relative paths (/uploads/${filename}), fixing broken image links in both the detail modal and upload previews.

Separated Preview Containers

Created a dedicated #book-cover-preview-container to prevent manual image uploads from accidentally overwriting and deleting the fetched book cover's hidden input data.

Fixed Image Deletion State

Updated the removeImagePreview logic to rely on the DOM element's actual position rather than static loop indices, preventing array out-of-bounds errors when removing selected files.

Code Cleanup

Removed obsolete video detection and thumbnail processing logic from the detail modal to improve rendering stability.

Commit: c62b2b553d
PreRelease: v0.13.16-dev.7

## Fix image processing pipeline and book cover previews ### Backend Updates #### Direct GridFS Integration Refactored the /download_book_cover route to process downloaded images entirely in-memory (using io.BytesIO) and save them directly to MongoDB GridFS. This eliminates the reliance on local file storage and instantly makes the image available for the frontend preview. #### Security & Validation Maintained strict SSRF protection, added 5MB chunked download limits, and enforced MIME-type validation before inserting data into the database. ### Frontend Updates #### Fixed Broken Image URLs Replaced server-side Jinja syntax ({{ url_for(...) }}) inside JavaScript with reliable relative paths (/uploads/${filename}), fixing broken image links in both the detail modal and upload previews. #### Separated Preview Containers Created a dedicated #book-cover-preview-container to prevent manual image uploads from accidentally overwriting and deleting the fetched book cover's hidden input data. #### Fixed Image Deletion State Updated the removeImagePreview logic to rely on the DOM element's actual position rather than static loop indices, preventing array out-of-bounds errors when removing selected files. #### Code Cleanup Removed obsolete video detection and thumbnail processing logic from the detail modal to improve rendering stability. Commit: c62b2b553dbf83396d1c53a73ae663627f227cae PreRelease: v0.13.16-dev.7

Aiirondev commented

2026-08-16 21:22:59 +00:00