Web extension resources return incorrect MIME type

[jeanp413]

From gitpod-io/gitpod#10523

It seems the root cause of that bug is that Web extension resources served from openvsx return an incorrect MIME type
For example:

• Requesting for https://openvsxorg.blob.core.windows.net/resources/pomdtr/excalidraw-editor/3.0.1/extension/public/static/css/main.9cab4879.chunk.css returns Content-Type: text/plain when it should be text/css
• Requesting for https://open-vsx.org/vscode/asset/pomdtr/excalidraw-editor/3.0.1/Microsoft.VisualStudio.Code.WebResources/extension/public/static/js/main.34d01954.chunk.js returns Content-Type: text/plain when it should be application/javascript

Chrome doesn't complain but Firefox gives more useful logs

cc @amvanbaren

[amvanbaren]

I've replaced the fileType detection logic with Apache Tika. It supports more file types out of the box and it lets you configure custom file types too.

The bad news is that the getFileType method is also used when uploading a file to cloud storage:

openvsx/server/src/main/java/org/eclipse/openvsx/storage/GoogleCloudStorageService.java

Lines 71 to 72 in 72706d1

	var blobInfoBuilder = BlobInfo.newBuilder(BlobId.of(bucketId, objectId))
	.setContentType(StorageUtil.getFileType(fileName).toString());

openvsx/server/src/main/java/org/eclipse/openvsx/storage/AzureBlobStorageService.java

Lines 72 to 73 in 72706d1

	var headers = new BlobHttpHeaders();
	headers.setContentType(StorageUtil.getFileType(fileName).toString());

This means that all files that currently are incorrectly of type text/plain and all vsix packages (type should be application/vsix instead of application/octet-stream) need to be downloaded and re-uploaded with the correct Content-Type.

Luckily the release that is not running in production yet uses JobRunr to perform a long running migration in the background. The same technique can be used to re-upload files with the right Content-Type.

TODO

• Fix file type detection
• Re-upload all incorrect text/plain files
• Re-upload all *.vsix packages

[jeanp413]

This only matters for web extension (__web_extension tag) and I guess there're not many of those 🤞, do you have some numbers about the number of web extension?

[amvanbaren]

Ok, that would narrow it down. I don't know how many of the extensions are web extensions.

[amvanbaren]

Reminder

TODO

• Fix file type detection
• Re-upload all incorrect text/plain files
• Re-upload all *.vsix packages

[kineticsquid]

@amvanbaren Just making sure I'm following the discussion. This is not a change we're asking extension authors to make, but rather a batch process to 're-publish' extensions to have the file types registered correctly?