Add specific application/x-binary mime type for bin extension files to mime type mapping

[AlexAndBear]

Enhancement: Add specific mime type for bin files

We've added the specific mime type 'application/x-binary' for bin files to the list of mime types.

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[kobergj]

@2403905 will take the review over. We are not sure this fixes it without side effects.

needs investigation

[2403905]

We map the mime type to files by extension and not only bin has type application/octet-stream, there are bpk, buffer and etc. in a mimeTypes map. We also set the application/octet-stream to any files w/o extension.

I think we should take a look at the ListSupportedMimeTypes

[2403905]

I think the problem is here https://github.com/owncloud/ocis/blob/4d5168f6c3ab182db596c996e8b9090f4dedc55e/services/collaboration/pkg/helpers/registration.go#L41

	mimeTypesMap := make(map[string]bool)
	for _, extensions := range appUrls {
		for ext := range extensions {
			m := mime.Detect(false, ext)
			mimeTypesMap[m] = true
		}
	}

The mime.Detect returns the "application/octet-stream" as default. So, we could skip there the "application/octet-stream" mime type.

[AlexAndBear]

~~And then the files w/o a mapped extension<>mime type have no mime type anymore? I think the default is there on purpose.

I am wondering why OnlyOffice and Collabora are configured to be able to open especially the application/ocet-stream mime type.

Shouldn't we just avoid that ?~~

NVM, you are totally right, I think that ^ is especially what you are trying to achieve 💪

[2403905]

Fixed in a ocis