upload file in the flutter web with web view or another programing

Hi I need to receive user information and a zip file to register in Web Flutter, but the file_picker and ... package does not support uploading files zip to Web flutter. I have to find a way to this position .... Can be uploaded to a server in a web view or new web window via a webpage NodJS or php or ... Send and report the post to Flutter page and let Flutter listen to what happened on that page ... and do something? How can I do this? And is there another way to upload the file from the web Flutter to the server?