Uploaded files show up in priv/static/uploads like this: “uploads/live_view_upload-1662238207-966158677041787-1”
Since there is no file extension, I can’t figure out how to display the images after upload.
I know there must be a straightforward way to do this, but after playing around I couldn’t figure out an elegant solution besides parsing %Phoenix.LiveView.UploadEntry{}. Any help would be much appreciated. Thanks!
…or if the client name has no extension, then you can try to derive it from the content type with MIME.extensions/1
[extname] = MIME.extensions(entry.client_type)
…and if you have restricted allowed upload types with the :accept option on allow_upload/3 then it should always return an expected value.
…but none of that guarantees that the metadata is valid. If you need to know that those bytes are a JPEG you’ll need to use something like GenMagic which invokes libmagic under the hood and introspects the actual file bytes, and then invoke MIME.extensions/1 with the result mime_type to search for a known extension.
Using Path.extname solved the extension name issue. I had assumed that was why the images weren’t displaying, but that actually didn’t solve the issue, because I hadn’t realized that I needed to configure Plug to include the “images” folder in static assets. Now I see that the original guide would have worked out as is, without the extension name, if I had done that step when creating the folder in static.