fix: handle uppercase image extensions when pasting file paths #6005
+22
−3
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Bun.file() only recognizes lowercase file extensions for MIME type detection. When dragging images from Finder on macOS, files often have uppercase extensions like .PNG or .JPG, which causes Bun to return 'application/octet-stream' instead of the correct image MIME type. This meant pasted image paths were not recognized as images and wouldn't display the [Image 1] UI indicator. The fix adds a helper function that extracts the file extension, normalizes it to lowercase, and looks up the correct MIME type from a known list of image extensions.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
Fixes image detection when dragging/pasting file paths with uppercase extensions (e.g.,
.PNG,.JPG) from Finder on macOS.I airdropped these screenshots from my phone and dragging the to OpenCode doesn't work:
Problem
Bun.file()only recognizes lowercase file extensions for MIME type detection. When you drag an image from Finder that has an uppercase extension like/Users/nem035/Downloads/IMG_8048.PNG, Bun returnsapplication/octet-streaminstead ofimage/png:This caused pasted image paths to not be recognized as images, so they would be treated as plain text instead of showing the
[Image 1]yellow UI indicator.Solution
Added a helper function that extracts the file extension, normalizes it to lowercase, and looks up the correct MIME type from a known list of image extensions. This is used as the primary source for MIME type detection, with
Bun.file().typeas a fallback for other file types.