Get orientation from Media object

answered 2022-06-15 14:37:59 +0800

MDuchemin
2560 ● 1 ● 6

Hey there,

In that case, you would need to use a dedicated PDF library, such iText, openPDF or other similiar "service side PDF handling library".

I expect that most PDF libraries would have the ability to give you the document format, or failing that, the page width and page height for you to compare.

Just a warning there: while most user will generate PDFs using a standard print paper format (usually A4), there is no spec in PDF that says they have to use a standard format.

You could create a 1px by 1px pdf containing a black dot, and it would be a valid PDF file. That's probably an edge case, but you should be aware of that in advance :D

answered 2022-06-10 12:34:04 +0800

MDuchemin
2560 ● 1 ● 6

Hi there,

The media you receive at the end of fileupload is just a wrapper for the byte content of the upload, with a few meta-data provided by the browser upload (name, size, extension, etc).

The orientation is not part of that metadata. It's also only applicable to a few file types.

If you need that information, you may need to read the file content at server-side, and retrieve the orientation from the file content itself.

What type files do you want to retrieve the orientation for? (image, pdf, word, etc?)